TEST-901D SUBSTATION CT TEST AND PRIMARY CURRENT INJECTION DEVICE

 TEST-901D is a professional, all-in-one test instrument specially developed for substation commissioning and maintenance. It integrates high-precision CT ratio detection, polarity verification, and 1000A primary current injection functions to meet on-site testing requirements of current transformers, circuit breakers and protective relays. With a 7-inch touchscreen, built-in thermal printer, USB data output and full protection mechanisms, it ensures stable, efficient and safe operation. Its compact structure and light weight make it an ideal solution for field electrical testing.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

GF106T6 Field-Use CT Tester with Data Storage & Printing

 Designed for tough on-site working conditions, the GF106T6 brings strong, stable CT testing to field and outdoor environments. It supports full testing of measurement, protection, and TYP-class current transformers, with 6-unit simultaneous testing to speed up daily inspection work.

Equipped with 10,000 groups of data storage, built-in thermal printer, and USB data export, it allows on-site data recording, report printing, and later file arrangement. The 7-inch touch LCD offers clear display and simple operation, while high accuracy and full standard compliance ensure test results are reliable and traceable.

This portable, all-in-one field tester is ideal for substation maintenance, power grid inspection, and on‑site equipment verification.

P8S High Sensitivity Current Probe for Low Current Leakage Detection

 This high-sensitivity probe excels at picking up faint leakage currents. It delivers steady signals and precise readings for electrical safety checks. The compact clamp allows easy live-line testing, fully meeting CAT III 600V safety requirements for field use.

Bullet Points

High sensitivity for accurate micro leakage current detection

Stable signal output for dependable test data

Easy non-invasive testing without wire disconnection

Compact structure, portable for various work scenarios

Strict safety certification for reliable field operation

GFUVE P8S Sensitive Leakage Current Probe, Detectable as Low as 1mA

The GFUVE P8S is a highly sensitive current probe engineered for micro leakage current testing, capable of capturing currents starting from just 1mA.

Fitted with high-grade permalloy core, it maintains 0.1% measurement precision, paired with broad frequency response and minimal phase shift to deliver consistent and trustworthy test data.

Featuring an 8mm compact clamp opening, it allows fast non-contact measurement on site. With CE and UL certifications, as well as compliance with CAT III 600V safety regulations, this probe is well-suited for equipment safety inspections, power system monitoring and on-site leakage current checks.

GFUVE P8S Premium Clamp CT | 0.1% Precision | 5/10/20A | European Certified

Engineered for professional electrical testing, the GFUVE P8S clamp CT adopts high-performance permalloy core to achieve outstanding measuring precision. It is your ideal pick for field calibration, power monitoring and harmonic testing tasks.

Core Features

Precision Grade: 0.1% & 0.2% available

Transformation Ratios: 1000:1, 2000:1, 2500:1 | Custom options supported

AC Current: 0~5A/10A/20A/30A, peak load up to 50A

Frequency Range: 10Hz to 500kHz, extendable to 2MHz

Minimal phase deviation: below 10 arcminutes for accurate power readings

8mm diameter jaw: portable and simple to operate

Safety Approval: CAT III 600V, fully compliant with EN 61010 & IEC norms

Wide Compatibility

Works seamlessly with meter calibrators, multimeters, oscilloscopes and power quality analyzers. Also great for leakage current inspection.

GF106T6 CT Tester Complying with IEC, IEEE & GB Specifications

 The GF106T6 is a professional multi-turn ratio current transformer tester developed following IEC, IEEE and GB criteria. It conducts accurate tests on metering, protective and TYP-type CT devices.

Full testing coverage includes transformation ratio, polarity, excitation features, ratio & phase error, coil resistance and load impedance. It supports six-channel parallel measurement and delivers testing precision up to 0.02%.

Outfitted with a 7-inch touch display, automatic demagnetization function, 10,000-set data storage, USB data export and integrated thermal printer, the device yields steady, reproducible and traceable test data. It serves well for routine work in substations, CT manufacturing plants, power labs and measurement institutions.

TEST-901D 1000A Portable Primary Current Injection Tester for Substation Commissioning

 The TEST-901D is a lightweight 1000A primary current injection tester tailored for substation commissioning, handover acceptance and daily power equipment maintenance. Adopting advanced ARM control technology and a high-power toroidal transformer, the unit delivers stable and powerful current output for on-site primary testing.

Configured with a 7-inch color touch screen, high-precision measurement modules, a built-in timing system and an integrated thermal printer, this intelligent test device supports fully automatic testing workflows. It accurately implements primary and secondary current measurement, CT ratio and polarity verification, as well as testing of circuit breaker operating current and action time. Equipped with comprehensive overload, over-temperature and short-circuit protection functions, it ensures safe and stable operation in complex field environments.

Weighing only 20kg with a compact and integrated structure, the tester features excellent portability for outdoor and on-site deployment. It is widely applied for primary current testing of switchgears, circuit breakers, protection relays and current transformers, effectively verifying the operational performance of power equipment and guaranteeing the safety and reliability of power distribution systems.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

T-3630 15kV High Precision Insulation Resistance Tester for Power System Inspection

 The T-3630 is a high-precision professional insulation testing instrument, purpose-built for full-scenario detection and performance evaluation in the power industry. It is widely applicable for insulation condition analysis of power grids, substations, generators, transformers, high-voltage cables and various power distribution equipment, delivering systematic and accurate test results for power equipment status assessment.

The device supports multi-level high-voltage output with a maximum of 15kV, covering an ultra-wide measurement range from 0.01MΩ to 50TΩ. Featuring 3% test accuracy and excellent anti-interference capability, it maintains stable and consistent detection data in complex electromagnetic environments. It can automatically calculate Polarization Index (PI) and Dielectric Absorption Ratio (DAR), enabling precise professional diagnosis of equipment insulation aging, dampness and internal hidden defects.

Integrating multiple practical functions including AC/DC voltage measurement, DC current detection and capacitance testing, the tester comes with 500-group local data storage, USB data transmission and matched PC analysis software to realize efficient data management and automatic report generation. Adopting an IP65 rugged portable housing, built-in rechargeable battery and large backlit LCD screen for clear viewing in low-light conditions, it is the ideal tool for power equipment maintenance, project acceptance and substation routine inspection, providing safe, efficient and professional insulation testing solutions for industrial and power systems.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/electrical-test-tool/hv-insulation-resistance-tester.html

GF106T6 Current Transformer Tester for Substation & Industrial Factory Inspection

 Engineered for rigorous substation commissioning and factory quality verification, the GF106T6 is a high-performance multi-turn ratio current transformer testing device. It is fully compatible with metering, protective and TYP-type CTs, capable of completing all mainstream testing items such as transformation ratio, polarity judgment, excitation characteristic, error characteristic curve, coil resistance and load impedance measurement.

Equipped with 6 synchronous testing channels and featuring precision up to 0.02%, this instrument strictly conforms to IEC, IEEE and national GB specifications, delivering consistent and accurate test data even under complex field and workshop working conditions.

Fitted with user-friendly 7-inch touch display, integrated printing function, USB and WiFi data transmission ports as well as 10,000 sets of built-in data storage space, it serves as an ideal efficient testing solution for on-site routine detection, product quality supervision and power equipment daily maintenance work.

GF211D Dual-Clamp Digital Phase Tester for On-Site Power Measurement

 The GF211D is a lightweight handheld dual-clamp phase tester, professionally developed for on-site electrical inspection and maintenance tasks. It delivers precise measurement of AC voltage (0–600V), AC current (0–20A), phase angle (0–360.0°), frequency, active and reactive power, as well as power factor. Fitted with two external clamp sensors, the device enables non-invasive current testing without wire disconnection, greatly simplifying field operation.

This smart electrical measuring instrument supports multiple practical detection functions, including discrimination between inductive and capacitive circuits, three-phase sequence verification, transformer connection inspection, phase relation analysis for differential protection, and wiring correctness validation. Adopting a high-definition 3.5-inch color LCD screen, it boasts 0.5% high measurement accuracy and an IEC-compliant isolated safety structure. Weighing merely 0.45kg and built with portability in mind, it can store up to 500 groups of measurement data. Suited for rigorous industrial scenarios, this tester is extensively applied in substations, power plants, manufacturing factories, mines and petrochemical industries to conduct efficient, secure and dependable on-site electrical testing.

TEST-901D 1000A Primary Current Injector for CT Ratio & Polarity Testing

 The TEST-901D is an all-in-one integrated testing instrument engineered for CT on-site verification. It integrates 1000A primary current injection, CT ratio testing and polarity detection into a single compact unit. Adopting an advanced ARM control system and equipped with a 7-inch colorful touch screen, the tester delivers straightforward human-machine interaction. It is capable of precisely capturing primary and secondary current data, calculating CT transformation ratio, and identifying polarity conditions automatically.

Featuring a high-accuracy sensing module and an embedded thermal printer, the equipment supports on-site data printing and reliable measurement output. Comprehensive protective mechanisms including overload, short-circuit and over-temperature protection ensure safe and stable operation during heavy-duty testing procedures. Widely applicable for substation commissioning, switchgear inspection and routine power equipment maintenance, this primary injection tester offers dependable performance for various power system verification tasks.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

T-3630 High Voltage Insulation Resistance Tester for Field On-Site Testing

 The T-3630 serves as a compact high-voltage insulation tester optimized for outdoor and on-site electrical diagnostics. Combining outstanding portability, stable measuring performance and superior environmental adaptability, this megohmmeter adopts an IP65-rated rugged housing with shockproof, dustproof and moistureproof properties. It maintains consistent working stability in harsh working scenarios including power stations, substations, oilfields and industrial facilities.

This handheld instrument provides adjustable high voltage output ranging from 250V to 15kV, with an ultra-wide insulation resistance measurement range reaching up to 50TΩ, ensuring exceptional resolution and testing precision. It is integrated with multiple testing functions, such as AC/DC voltage measurement, DC current detection, capacitance analysis, and automatic PI & DAR calculation. Equipped with data storage, USB data transmission and matched PC analysis software, it facilitates efficient data management.

Powered by a built-in rechargeable 12V battery and fitted with a large backlit LCD screen for clear visibility in dim environments, the T-3630 significantly enhances the convenience and efficiency of field insulation testing. It is an indispensable testing instrument for equipment inspection, routine maintenance and outdoor power engineering tasks.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/electrical-test-tool/hv-insulation-resistance-tester.html

GF106T6 Multi-Functional 6-in-1 Current Transformer Tester

 The GF106T6 serves as an all-in-one six-channel current transformer testing device, effectively boosting detection efficiency for measurement, protection and TYP-type CT equipment. It enables synchronous testing of six current transformers at the same time, integrating CT transformation ratio verification, polarity detection, excitation characteristic test, error curve analysis, coil resistance testing and load impedance measurement into a single portable device.

Equipped with a 7-inch full-color touch display, it features intelligent automatic data computation, supports storage of 10,000 sets of test records, allows data export via USB interface and comes with an embedded printing module for instant report output. It streamlines field operating procedures and cuts down on-site test workload. Fully compliant with IEC, IEEE and national GB industrial specifications, this lightweight integrated testing instrument is widely applicable to substation project commissioning, factory product quality inspection, professional lab calibration and routine electric power system maintenance work.

GFUVE GF211D Portable Digital Dual-Channel Phase Tester

 The GFUVE GF211D is a lightweight handheld two-channel phase measuring instrument, tailored for reliable and speedy on-site electrical inspection tasks. Fitted with two clip-on current sensors, it realizes non-stop live line testing with no need to cut off circuits. It can precisely measure AC voltage, alternating current, phase difference, frequency, active power, reactive power as well as power factor.

Built with safe isolated input design, it adopts a 3.5-inch vivid color LCD screen for intuitive data reading. It boasts 0.5-level high measuring accuracy and can save up to 500 sets of test data. This device can easily distinguish inductive and capacitive loads, judge three-phase phase sequence, inspect transformer wiring status, confirm electric energy meter wiring correctness, and analyze phase relations of CT differential protection systems.

Lightweight at merely 0.45 kilograms and driven by rechargeable 9V lithium battery, this sturdy tester complies with IEC safety standards. It is widely applied in substation installation acceptance, daily power equipment maintenance, industrial electrical detection and on-site fault diagnosis for electric power, machinery manufacturing, petrochemical and other industries.

TEST-901D CT Calibrator & Primary Current Injection Tester

 TEST-901D CT Calibrator & Primary Current Injection Tester

The TEST-901D combines precise current transformer calibration with 1000A primary current injection capability, delivering all-round testing solutions for substation field work. It performs accurate CT ratio and polarity detection, and outputs high current to complete relay protection and circuit breaker performance verification.

Fitted with a 7-inch touch screen, it presents test data straightforwardly. Featuring superior measuring accuracy, internal thermal printing function and USB data transmission interface, alongside comprehensive safety protection design, this portable lightweight equipment effectively boosts efficiency for on-site CT calibration and power system commissioning operations.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

T-3630 Multi-Voltage High Voltage Insulation Resistance Tester

 T-3630 Multi-Voltage High Voltage Insulation Resistance Tester

The T-3630 high voltage insulation resistance tester is a professional multi-range megohmmeter designed for accurate insulation assessment. It provides adjustable test voltages up to 5kV, 10kV or 15kV, covering a wide resistance measurement range from 0.01MΩ to 50TΩ with 0.01MΩ resolution for reliable readings.

It integrates comprehensive measurement functions, including insulation resistance, AC/DC voltage, DC current and capacitance, and automatically calculates polarization index (PI) and dielectric absorption ratio (DAR). The large backlit LCD ensures clear visibility, while 500-group onboard memory and USB interface enable easy data storage, export and analysis.

Built with an IP65 dust‑proof and moisture-‑proof enclosure, powered by a rechargeable battery and featuring intuitive menu operation, the T-3630 is portable and durable. It complies with IEC standards and is widely used in substations, power cables, transformers, motors and general industrial electrical maintenance, delivering stable, repeatable and traceable test results.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/electrical-test-tool/hv-insulation-resistance-tester.html

T-3630 HV Insulation Megohmmeter with PI & DAR Function

 Designed as a professional handheld high-voltage insulation diagnostic instrument, the T-3630 is ideal for field and factory electrical maintenance work.It features adjustable output voltage from 250V to 15kV and an ultra-wide insulation resistance measuring range up to 50TΩ. The meter can automatically compute Polarization Index (PI) and Dielectric Absorption Ratio (DAR) to conduct comprehensive insulation condition evaluation.

Boasting compact size and rugged construction, it comes with IP65 ingress protection, a large backlit LCD display, 500 sets of data storage, USB communication interface and rechargeable battery supply. It is highly portable for on-site testing of transformers, motors, cables and other power equipment.

With steady measuring accuracy, outstanding anti-interference capability and user-friendly menu operation, the T-3630 ensures safe, reliable and efficient insulation assessment for power grids, telecom systems, oilfields and general industrial electrical scenarios.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/electrical-test-tool/hv-insulation-resistance-tester.html

 High Current Injection Test Instrument – TEST-901D

The TEST-901D is a lightweight, high-accuracy field testing device engineered for substation commissioning, relay protection checking and CT testing.It delivers steady high current output up to 1000A, enabling fast and precise primary injection tests.

Equipped with an intuitive touchscreen, integrated thermal printer and comprehensive safety protection functions, the unit is compact and highly portable for convenient on-site use.It effectively boosts the efficiency of field tests and equipment verification, and is widely applied in power commissioning, substation upkeep and electrical system inspection.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

Professional Dual Clamp Phase Angle Meter GF211D

 The GF211D Phase Angle Meter is a professional handheld tester specially designed for field inspection and maintenance of power systems.It applies dual-clamp non-contact measurement technology, allowing safe and rapid testing without power outage or wire disconnection.

The device supports comprehensive phase angle testing among voltage, current, and their combined signals. It also delivers precise measurement of voltage, current, frequency, power and power factor.Boasting 0.5% high accuracy, a 3.5-inch color screen and 500-group data storage capacity, it provides clear visual reading and easy data record management.

With a compact and lightweight body and full compliance with IEC safety regulations, the GF211D is ideal for substation commissioning, power plant routine inspection, industrial electrical maintenance and on-site fault diagnosis, effectively guaranteeing reliable and secure operation of power equipment.

Primary Current Injection Test Equipment for Power System – TEST-901D

 Primary Current Injection Test Equipment for Power System – TEST-901D

The TEST-901D is a professional portable primary current injector tailored for power system commissioning, routine maintenance and quality acceptance inspection.It offers stable high-current output ranging from 0 to 1000A, supporting accurate testing of current transformers, protective relays, circuit breakers and other primary power equipment.

Equipped with a 7-inch touch display, intelligent control system, integrated thermal printer and comprehensive safety protection design, the device features high measurement accuracy, simple operation and excellent durability.Compact and lightweight for easy transport, it is extensively applied in substations, power plants and industrial electrical facilities to deliver fast, dependable on-site primary current testing.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

GF106T6 Multi-Range CT Test Analyzer

 The GF106T6 is a professional multi-range current transformer analyzer designed for full-range CT inspection and verification. It covers an extensive ratio testing scope and performs reliable measurement for metering, protection and TYP-class CTs with steady and consistent performance.Equipped with a 7-inch high-definition touch screen and one-touch automatic operation, it integrates comprehensive testing functions to simplify complicated testing tasks both on-site and in laboratories. Supported by large-capacity data storage, USB report export and built-in printer, it realizes full-process data management, perfectly fitting routine testing, factory quality inspection and substation commissioning projects.

GF211D: Portable Dual-Clamp Phase Sequence Analyzer

 The GF211D is a lightweight handheld dual-clamp phase tester optimized for safe, convenient and high-precision on-site electrical measurement. It integrates phase detection, voltage and current monitoring, power parameter analysis and circuit identification into a single compact unit, effectively simplifying routine electrical commissioning and daily maintenance procedures. Featuring a 3.5-inch high-definition color LCD screen, the instrument delivers straightforward data readings and intuitive vector visualization for field operation. Adopting a non-contact clamp structure, it enables live-line current measurement without wire cutting or power outage, significantly enhancing on-site operational safety and working efficiency. With Class 0.5 high measurement accuracy, a broad testing range and comprehensive safety protection design, it fully satisfies technical requirements for substation relay inspection, transformer wiring verification, industrial electrical maintenance and power grid field testing. Boasting portable weight, built-in battery supply and rugged mechanical structure, the GF211D acts as a stable and trustworthy measuring instrument for electrical technicians and field maintenance personnel.

GF106T6 Automatic Multi-CT Comprehensive Test System

 The GF106T6 is a fully automated professional system developed for high-efficiency current transformer testing. It enables simultaneous testing of up to six CT units, allowing one-touch automatic completion of ratio, polarity, error characteristic, excitation curve, demagnetization and winding resistance measurements. The system automatically calculates knee-point voltage, error curves and key accuracy indicators, drastically cutting manual workload and boosting overall testing productivity.Integrated with a 7-inch touch display, large-capacity data storage, USB data export and on-site printing functions, this all-in-one CT tester delivers a complete and user-friendly solution for substation commissioning, factory incoming inspection, laboratory calibration and on-site power maintenance work.

1000A AC/DC Digital Clamp Meter – GFUVE

This high-performance GFUVE clamp meter safely handles measurements up to 1000A AC/DC current and 1000V voltage. Built with True RMS technology, it ensures precise and reliable measurement results.

It is capable of inrush current capture, non-contact NCV detection, temperature measurement, and features low-pass filtering specially designed for inverter system testing.

Boasting a compact and lightweight body, the instrument complies with strict CAT III safety standards. It is perfectly suited for industrial maintenance, power inspection work and on-site electrical fault diagnosis.

T-3630 High Voltage Insulation Resistance Testing Meter

The T-3630 high voltage digital insulation resistance tester is a professional multifunctional instrument tailored for insulation measurement on transformers, motors, power cables and other electrical assets. It adopts advanced integrated circuit technology, with adjustable test voltage ranging from 250V to 15kV, and an ultra-wide measuring range from 0.01MΩ up to 50TΩ with excellent resolution.

The unit combines DC/AC voltage detection, DC current measurement and capacitance testing, alongside DAR and PI analysis functions to fulfill all-round testing requirements. Designed with IP65 protection, it offers outstanding shockproof, dustproof and moisture-proof performance. It is equipped with a large backlit LCD, 500-set data storage, USB communication and supporting PC software, as well as a rechargeable battery system.

Suitable for power utilities, industrial maintenance, oilfield operations, telecommunications and electromechanical industries, the T-3630 provides stable output, high measurement accuracy and simple operation, ideal for both field high-voltage inspection and laboratory insulation testing.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/electrical-test-tool/hv-insulation-resistance-tester.html

TEST-901D Primary Current Injection Test Device with High Output

 The TEST-901D is a high-performance all-in-one testing unit, capable of delivering a maximum output current of 1000A. It is professionally developed for primary current injection testing in power system applications.

This instrument supports accurate current measurement, CT ratio and polarity checking, circuit breaker time testing, as well as relay performance verification. It is fitted with a 7-inch color touchscreen, an integrated thermal printer, high-stability output circuitry and comprehensive protection functions.

With a compact footprint, lightweight design and user-friendly operation, the TEST-901D serves as an ideal testing solution for substation commissioning, daily equipment maintenance and factory acceptance tests.

For more information about our products, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

GFUVE Handheld Phase Angle & Voltage Meter – 3.5 Inch Color Screen

 Equipped with a high-brightness 3.5-inch color LCD screen, this GFUVE digital phase angle voltmeter presents sharp and legible measurement data, perfectly visible even in dim outdoor working conditions. It integrates the functions of a voltmeter, ammeter, phase angle meter and power parameter tester into a compact handheld device, enabling 0–360.0° full-range phase measurement among dual voltage, dual current, and voltage-current signals.

It adopts two clamp sensors to realize non-contact current sampling, allowing safe live-line inspection without cutting off any wiring. Built with high-precision circuitry, it achieves an accuracy of 0.5% for voltage, current, phase angle, frequency, active/reactive power and power factor. The large display intuitively shows vector diagrams, real-time measured values and analysis results, while built-in memory for 500 data groups facilitates on-site record keeping and subsequent data review.

Featuring a lightweight portable body, rechargeable battery supply and IEC safety certification, this all-in-one measuring instrument is an optimal choice for substation maintenance, power engineering projects, industrial electrical checks and field fault diagnosis.

GF106T6 0.02% High Accuracy Current Transformer Analyzer

The GF106T6 is a high-accuracy multi-ratio current transformer analyzer developed for professional CT testing. Boasting a precision level as high as 0.02%, it provides stable and highly repeatable test results for CT transformation ratio, polarity, ratio & phase error, excitation properties, knee point voltage, and secondary winding resistance.

The device supports simultaneous testing of up to 6 CT units. Equipped with a 7-inch touch LCD screen, automatic error computation, onboard data storage and integrated printing function, it balances outstanding precision with simple operation. Fully compliant with IEC, IEEE and GB international standards, this professional CT testing instrument is perfectly suited for laboratory calibration, factory routine inspection and substation commissioning projects.

 

GF106T Portable CT/PT Analyzer for Substation Commissioning

 The GF106T is a portable, all-in-one CT and PT analyzer engineered for substation commissioning, on-site verification and acceptance testing of current and voltage transformers. It integrates comprehensive test capabilities, including excitation characteristics, transformation ratio, polarity, error curves, secondary load and winding resistance, allowing engineers to perform full-range CT/PT testing efficiently in the field.

Featuring a 7-inch touchscreen display, an integrated thermal printer, USB data export and storage for up to 3,000 test records, the unit enables quick report generation and reliable data archiving. Its compact portable design, wide measurement range, high accuracy of 0.2%, and compliance with IEC and GB standards make it a dependable and indispensable instrument for substation commissioning, power system maintenance and field engineering projects.

GF312V2S Interface and Communication Configuration

 The GF312V2S is equipped with a practical and site-optimized interface layout, paired with a 7-inch 800×480 color TFT touch screen to deliver straightforward operation and crystal-clear data display.It comes fully built with mainstream communication interfaces such as USB, RS232 and Ethernet, with Bluetooth and Wi-Fi available as optional extras. This enables smooth data transmission, remote control via PC software, and convenient connection with mobile applications.

To accommodate meter calibration requirements, the unit is fitted with an intelligent optical sampling port, 3-channel pulse input and programmable pulse output, realizing precise synchronization with connected energy meters. It can also be easily linked with external printers, external keyboards and a wide range of clamp-on current transformers, allowing highly flexible on-site deployment.

All onboard interfaces adopt high-isolation design and comply with CAT III 600V safety rating, delivering reliable operation and enhanced safety even in complex and harsh field conditions.

Industrial-Grade GF208D AC/DC Clamp Meter for On-site Electrical Testing

 The GF208D is a heavy-duty industrial AC/DC clamp meter built for versatile and reliable on-site electrical measurement. Supporting up to 1000V and 1000A measurement range, this handheld meter integrates abundant practical testing functions to simplify daily electrical maintenance. It is equipped with inrush current capture, non-contact voltage detection (NCV), data hold and auto-ranging functions for efficient one-key operation. Featuring LoZ low-impedance mode and LPF low-pass filtering, it effectively eliminates ghost voltage and filters inverter interference to ensure precise readings in complex power environments. With an intuitive LCD screen and built-in flashlight, the GF208D guarantees clear visibility even in dim working conditions. Additional temperature measurement and data storage further enhance its usability, making it an ideal portable measuring tool for industrial inspection, circuit debugging and field maintenance.

GF211D Dual-Channel Digital Phase Angle Meter – Wiring Instructions

The GF211D digital phase angle meter is engineered for safe, convenient, and high-reliability on-site phase measurement. Designed with dual voltage input terminals (U1, U2) and dual clamp current inputs (I1, I2), the instrument enables live-line testing without cable stripping or power shutdown, ensuring efficient and non-destructive field wiring.

It supports three mainstream wiring measurement modes: voltage-to-voltage phase testing, current-to-current phase testing, and voltage-to-current phase testing, covering most conventional power inspection scenarios. With clearly marked terminals, quick-connect cables, and non-contact current clamps, the device simplifies wiring procedures while lowering operational risks.

Integrated with automatic phase recognition, a high-definition LCD display, and reliable overload protection, the GF211D delivers stable and repeatable test data with minimal manual intervention. Even operators with limited experience can complete accurate phase detection effortlessly. Ideal for substation relay commissioning, transformer wiring verification, and industrial electrical maintenance, this phase angle meter serves as a practical and dependable tool for daily power field testing.

GF106T6 Professional Current Transformer Test & Calibration Analyzer

The GF106T6 Current Transformer Analyzer is a professional high-precision testing instrument, specially developed for metering, protection and TYP-class current transformers.It achieves an outstanding accuracy level up to 0.02% and covers a wide transformation ratio range of 1 to 50000. The device can accurately measure CT ratio error, phase error, excitation characteristics, knee point voltage and winding resistance in one go.

Equipped with 6-channel simultaneous testing and automatic demagnetization functions, the instrument fully complies with IEC, IEEE and GB international standards. It is widely applicable for laboratory calibration, factory incoming inspection and substation on-site commissioning.

Featuring a 7-inch intuitive touch screen, large-capacity data storage, USB data export and a built-in printer, the GF106T6 greatly simplifies operation, data recording and report output, perfectly meeting the demands of high-precision CT testing and daily field work.

Industrial-Grade T-3630 15kV Insulation Resistance Megohmmeter

The T-3630 15kV High Voltage Insulation Resistance Tester is a robust industrial-grade instrument, purpose-built for precise insulation assessment of high-voltage assets. It delivers stepped high-voltage outputs up to 15kV, covering an ultra-wide resistance range of 0.01MΩ to 50TΩ with 0.01MΩ resolution and 3% accuracy, ensuring dependable diagnostic results.

Combining multi-functional testing capabilities, it supports PI/DAR polarization index & dielectric absorption ratio analysis, AC/DC voltage measurement, DC current and capacitance testing—all essential for comprehensive on-site insulation evaluation. Encased in an IP65-rated rugged housing, it offers excellent protection against dust, moisture and impact for harsh environments.

Designed for user efficiency, the tester features a large backlit LCD, 500-group data storage, USB connectivity with PC software, and a built-in rechargeable battery. Compact and lightweight at only 2.75kg, it is ideal for fieldwork. Widely adopted in power systems, transformer maintenance, cable testing, motor inspection and industrial electrical applications, the T-3630 is your reliable solution for professional high-voltage insulation testing.

TEST-901D Integrated Primary Current Injection Test Device

The TEST-901D is a lightweight all-in-one 1000A primary current injection test set, tailored for substation commissioning and on-site power maintenance.It is widely applied for CT ratio and polarity verification, circuit breaker performance testing, relay protection inspection and full-range primary current injection tests.

Adopting a high-precision acquisition module, the unit ensures stable output and accurate test results. It is fitted with a 7-inch color touch screen for intuitive data viewing, a built-in thermal printer to generate test reports on site, and comprehensive safety protection design for reliable field use.

With an ultra-light weight of only 20kg, the compact structure enables easy carrying and flexible deployment. It is an ideal testing solution for power plants, substations and electrical engineering maintenance projects.

GF312V2S Three-phase Reference Meter – Interfaces & Technical Overview

The GF312V2S three-phase reference meter integrates comprehensive and highly reliable interface configurations, enabling efficient on-site calibration and intelligent data management. It comes with built-in USB, RS232 and Ethernet ports, while Bluetooth and Wi-Fi are available as optional modules to ensure stable connection with computers, mobile applications and external printers.

Designed for synchronous meter verification, the unit is fitted with 3-channel pulse input and programmable pulse output, as well as an optical sampling port dedicated to energy meter testing. It adopts a 7-inch 800×480 high-resolution color touch LCD, which clearly displays real-time waveforms, vector diagrams and test results for intuitive operation.

Supporting connection with an external keyboard and thermal printer, the device simplifies field operation and on-site report printing. All interfaces feature reinforced isolation and circuit protection, fully complying with CAT III 600V safety requirements to maintain stable and reliable operation under complex and harsh field conditions.

Functional Demo of GF312V2S Data Printing

The GF312V2S is equipped with practical on-site data printing capability by connecting an external thermal printer. It can directly print out test records, waveforms, vector diagrams and error reports. Featuring one-click screen capture and printing, the device allows users to instantly acquire clear hard copies, which are ideal for calibration certification, project handover and file archiving. Adopting standard communication interfaces for connection, it delivers stable and high-speed printing performance in field scenarios. This greatly boosts the working efficiency of on-site instrument calibration and inspection management.

GF106T6 CT Tester – Touch Screen & Data Printing Function

The GF106T6 CT Tester comes with a 7-inch user-friendly TFT touch LCD and a built-in thermal printer, enabling convenient and high-efficiency current transformer testing.

It supports one-touch operation, intuitive parameter display, and on-site data printing. The device also provides storage for up to 10,000 data sets, alongside USB and WiFi data export to generate test reports in Word or PDF format.

Built for multi-channel measurement, it can test up to 6 CT units at the same time with outstanding stability. It covers comprehensive testing items including ratio, polarity, excitation characteristics, error curves, winding resistance and load tests.

Featuring simple operation and complete data management functions, this tester is widely applied in substation commissioning, factory incoming inspection, laboratory calibration and power equipment maintenance.

Digital Smart Phase Angle Meter – 0 to 360.0 Degree Full Range Measurement

This intelligent handheld phase angle meter provides accurate phase difference measurement across 0–360.0°. It is applicable to dual voltage, dual current, and voltage-current combined testing in live power systems. Equipped with dual clamp sensors, it allows safe and non-intrusive measurement without cutting off any wiring.

The device integrates high-precision testing of AC voltage, current, frequency, as well as active power, reactive power and power factor. It can automatically distinguish inductive and capacitive circuits, identify phase sequence, and verify wiring connection correctness. Fitted with a 3.5-inch color LCD screen for clear data viewing, it supports storage of up to 500 data sets for on-site recording and subsequent offline analysis.

Boasting 0.5% measurement accuracy, a portable and durable body design, IEC safety certification and battery-powered operation, this instrument is ideal for substation maintenance, industrial electrical inspection, power project commissioning and on-site fault diagnosis.

Data Print Function of TEST-901D Instrument

The TEST-901D features an integrated thermal printer, enabling one-touch printing of test data such as CT ratio, polarity, primary and secondary current values, as well as complete test results. It allows quick on-site data logging and archiving, streamlining fieldwork efficiency and convenience for substation commissioning and maintenance tasks.

T-3630 Integrated Insulation Resistance Testing Function

The T-3630 insulation resistance testing capability delivers professional, stable and highly accurate insulation assessment for various electrical assets and insulating materials. It offers adjustable output voltages spanning 100V to 15kV, supporting an ultra-wide measurement range from 0.01MΩ to 50TΩ, with 0.01MΩ resolution and 3% accuracy.

It automatically calculates the Dielectric Absorption Ratio (DAR) and Polarization Index (PI), enabling efficient analysis of insulation aging, moisture ingress and performance deterioration. Built with robust anti-interference performance and IP65 rugged construction, it ensures dependable measurements in demanding field environments, including power grids, industrial maintenance, oilfields and telecommunications sites.

Equipped with data logging, alarm alerts and USB data export, the T-3630 provides safe, standardized and efficient testing for routine inspections, factory calibrations and equipment acceptance procedures.

GFUVE 208D Clamp-On Meter Functional Introduction

GFUVE 208D is a 1000A AC/DC digital clamp meter equipped with a 6000-count display, true RMS measurement and auto-ranging function.It can safely measure current, voltage, resistance, capacitance, frequency, duty cycle and temperature, and also supports NCV non-contact voltage detection, LoZ low-impedance anti-false voltage measurement, LPF low-pass filtering for inverter testing, and inrush current capture.

Compliant with CAT III 1000V / CAT IV 600V safety grades, the meter features a lightweight and rugged design, perfectly suitable for industrial, power utility and field electrical testing applications.

T-3630 High Accuracy AC Voltage Measurement Unit

The T-3630 delivers stable and precise AC voltage measurement for electrical maintenance and high-voltage equipment inspection. As a multifunctional high-voltage insulation resistance tester, it supports 0–1000V AC voltage measurement with 0.1V high resolution and 3% accuracy, providing reliable test data for power systems, transformers, cables, motors and industrial electrical devices.

Equipped with a large gray backlight LCD screen, USB data communication, 500 sets of data storage and IP65 rugged enclosure, the T-3630 ensures safe, efficient and user-friendly AC voltage testing in both field and laboratory environments.

For more product details, please visit our official website: https://www.gfuvegroup.com/electrical-test-tool/hv-insulation-resistance-tester.html

TEST-901D Full Version High Precision CT Ratio Polarity Tester

The TEST-901D Full Version is a professional 1000A primary current injection test set, specially designed for CT ratio test, polarity check and primary current injection test. It is equipped with a 7-inch color touch LCD, high-precision measurement module, built-in thermal printer and full-range protection functions. Featuring compact structure, light weight and stable performance, it is widely used for current transformer, protective relay and circuit breaker testing in substation commissioning and maintenance.

For more product details, please visit our official website: https://www.gfuvegroup.com/primary-injection-test-equipment/1000A-primary-current-injection-test-equipment.html

GF211D 20A/600V High Precision On-site Phase Angle Meter

GF211D is a lightweight and portable handheld phase angle meter, specially developed for quick and safe field measurement tasks.It adopts non-contact dual-clamp current sensing and dual-channel voltage measurement, capable of precisely detecting phase angle, voltage, current, frequency and related power parameters.

Equipped with a 3.5-inch color screen and featuring 0.5% high measurement accuracy, the device runs on built-in battery with easy portability.It is widely applicable for substation commissioning, industrial equipment maintenance and various on-site electrical inspection work.

High Accuracy 3-Phase Secondary Current Injection Tester TEST-330B

The TEST-330B three-phase secondary current injection test set is an ideal high-end instrument designed for precision testing that requires accuracy up to 0.1% or higher. It is widely applicable not only for testing all types of protection relays and related equipment, but also acts as a versatile universal calibrator.

This intelligent secondary injection unit supports adjustable AC and DC current and voltage output, and can produce harmonics from the 2nd to the 21st order. It features a maximum output current of 90A and a maximum output voltage of 300V. Matched professional PC control software is available to realize remote control and automatic testing operations easily.

With outstanding testing accuracy and reliable stable performance, the TEST-330B is well suited for R&D, production verification and type testing of protection and metering device manufacturers. It is also an excellent choice for daily testing, debugging and commissioning work in power utilities and power grid companies.

GF106T6 Tester Accessory Introduction

The GF106T6 is equipped with a full range of specially configured accessories, enabling stable and user-friendly CT testing for both field on-site and laboratory applications.

Its standard configuration consists of premium primary and secondary test leads, sturdy connecting clamps, a dedicated grounding cable, a power supply line, and a rugged carrying case for convenient transportation and equipment protection.

These well-matched accessories guarantee firm connection wiring, minimal signal interference, and precise data transmission during CT ratio, polarity, excitation characteristic, DC resistance and error measurement tests.

Combined with the integrated thermal printer and USB data export capability, the complete accessory package supports efficient on-site work, real-time data recording and automatic report generation. It is perfectly suited for substation commissioning, factory quality inspection and daily routine maintenance tasks.

GF106T6 High Precision Multi-Ratio CT Analyzer

The GF106T6 multi-ratio CT analyzer is designed for field and laboratory testing of measurement-class, protection-class, and TYP-class current transformers. It supports automatic simultaneous testing of up to 6 CTs, covering excitation characteristics, transformation ratio, polarity, degaussing, ratio & phase error, 5% / 10% error curves, secondary winding resistance, and secondary burden.

Equipped with a 7-inch TFT touch color display, it offers primary current injection up to 100A or 1000A, a built-in mini thermal printer, and USB data export functionality. Compliant with IEEE C57.13, IEC60044, IEC61869, and GB/T20840-1/2 standards, the GF106T6 provides a comprehensive and user-friendly test solution for metering and protection CTs.

For more product details, please visit our official website:https://www.gfuvegroup.com/ct-pt-analyzer/multi-ratio-ct-analyzer.html

GF106T6 Current Transformer Ratio, Polarity, Error, Excitation and DC Resistance Test

The GF106T6 is a professional multi-ratio CT analyzer engineered for accurate testing of measurement, protection, and TYP-class CTs in both field and lab environments.

It supports simultaneous testing of up to 6 units, with full test coverage including ratio, polarity, ratio & phase error, excitation characteristics, knee point voltage, 5%/10% error curves, secondary DC resistance, and burden tests.

Designed for efficiency and reliability, it features a 7-inch touch TFT color LCD, 0.02% high precision, USB data export, built-in thermal printer, and 10,000 sets of data storage. Compliant with IEC60044, IEC61869, IEEE C57.13, and GB standards, it is widely used by power utilities, substations, CT/PT factories, and electrical labs worldwide.

GF106T6 Data Output Printing Test

The GF106T6 is a high-performance multi-ratio CT analyzer, featuring robust data recording and printing capabilities. It is capable of conducting comprehensive current transformer tests, covering ratio, polarity, error, excitation characteristics and DC resistance, and allows simultaneous testing of up to 6 CT units.

Built with an integrated thermal printer, the device supports on-site printing of test reports. It also provides USB data export, supports storage of up to 10,000 data sets, and enables report generation in Word and PDF formats.

Adopting a 7-inch touch LCD screen and delivering high measurement accuracy of 0.02%, the instrument complies with IEC, IEEE and GB standards. It is perfectly suited for field and laboratory applications, delivering easy data archiving and flexible output options.

IEEE PES T&D 2026 | We're here in Chicago!

The IEEE PES T&D Conference & Exposition 2026 is officially underway in Chicago, USA, from May 5–7 — and our team is right here!

Come meet us at Booth 1953 to experience our latest innovations in power system testing up close, including the GF106T6 multi-ratio CT analyzer and our full line of high-precision electrical test solutions. It's the perfect chance to connect with our experts, discuss your project needs, and see how our technology can elevate your field and laboratory testing workflows.

We're here and ready to meet with you — see you at the show!#IEEE PES #TD 2026 #Power Systems #Electrical Testing #CT Analyzer #Trasformeter Test Equipment #Circuit Breaker test equipment