CT PT Comprehensive Analyzer

Product Introduction

The MECTP-W120P Comprehensive Transformer Tester offers comprehensive functionality to meet diverse testing requirements for CTs and PTs, including excitation characteristics, turns ratio, and polarity. It automatically generates key parameters and error curves, complying with multiple national and IEC standards. Employing both low-frequency and square-wave methods, the instrument features simplified operation and standardized wiring. It stores up to 3,000 data sets with non-volatile memory, weighs only 7.5 kg, and offers exceptional portability. Ideal for power engineering installations, equipment maintenance, and product quality inspection.

Product Parameter (specification)

1) Input power supply voltage	AC100~264V; 50~60Hz
2) Output	0~180Vrms, 12Arms, 36A (peak)
3) Voltage measurement accuracy	Range;2~100Vrms, Accuracy;±0.1%
4) CT ratio measurement	Range;1~50000, Accuracy;±0.1%
5) PT ratio measurement	Range;1~50000, Accuracy;±0.1%
6) Phase measurement	Accuracy;±2 min, Resolution;0.5 min
7) Winding resistance measurement	Range;0~300Ω, Accuracy;0.2% ±2mΩ
8) AC load measurement	Range;0~1000VA, Accuracy;1% ±0.2VA
9) Current Boost Function (Optional)	Range;0~200A; Duration;0~600S
10) Operating Environment	Temperature;-20°C~50°C, Humidity;≤90%
11) Dimensions & Weight	Dimensions;40mm×260mm×140mm, Weight≈7.5kg

Product feature and application

★Comprehensive functionality meets testing requirements for excitation characteristics (i.e., volt-ampere characteristics), transformation ratio, polarity, secondary winding resistance, secondary load, ratio error, and phase angle error of various CTs (e.g., protection, metering, TP-type), while also supporting testing of excitation characteristics, transformation ratio, polarity, and secondary winding resistance for electromagnetic units of various PTs.

★ Automatically provides key parameters including knee point voltage/current, 10%(5%) error curve, accuracy limit factor (ALF), instrument security factor (FS), secondary time constant (Ts), remanence coefficient (Kr), and saturation inductance.

★ Tests comply with various transformer standards including GB1208 (IEC60044-1), GB16847 (IEC60044-6), and GB1207, automatically selecting applicable standards based on transformer type and rating.

★ Utilizes advanced low-frequency testing methodology to handle CTs with breakpoints up to 80kV.

★ The instrument employs the internationally popular square wave method, producing a more perfect excitation curve.

★ The instrument can store 3000 sets of test data, which is not lost in the event of a power failure.

★ Testing is simple and convenient, completing CT direct resistance, excitation, ratio, and polarity tests with a single button. Except for load testing, all other CT tests use the same wiring method.

★ Easy to carry, the instrument weighs approximately 7.5 kg.

Prodection details

I. Power Engineering Infrastructure Construction and Installation/Commissioning

For new substations, power plants, distribution rooms, and similar projects, conduct full-parameter verification of CTs (protection-grade, transient protection-grade, metering-grade, zero-sequence-type) and PTs. This includes testing excitation characteristics, transformation ratios, polarity, winding resistance, load capacity, and other parameters to ensure compliance with standards such as GB1208 and GB16847. Verify suitability for specialized installation scenarios like transformer bushing CTs and GIS switch CTs.

II. Power Equipment Operation, Maintenance, and Inspection

Regular Maintenance: Periodically test critical parameters of operational CTs/PTs, compare against historical data, and predict equipment aging or moisture ingress issues.

Fault Diagnosis: Address metering inaccuracies or protection malfunctions by identifying causes such as winding short circuits, core saturation, or excessive load.

Load Verification: After secondary circuit load changes, test load impedance and power factor to ensure errors remain within permissible limits.

III. Transformer Production and Quality Inspection

Factory Acceptance Testing: Perform full parameter testing on all CT/PT types per standards, automatically generating test reports as product qualification documentation.

IV. Other Applications

Laboratory Calibration: Used for research scenarios such as transformer performance studies and standard calibration.

Field Emergency Testing: The instrument is lightweight (7.5 kg) and compatible with wide-range power supplies (100–264 V), meeting outdoor and on-site emergency testing requirements.

Company Qualifications

FAQ

1)What are the grounding requirements for the MECTP-W120P Instrument Transformer Comprehensive Tester as outlined in its safety precautions?

Answer: This instrument is equipped with a protective grounding terminal. Before testing, the grounding terminal on the side of the instrument must be reliably grounded. Additionally, when conducting CT tests, one end of the CT primary side must also be grounded. Dual grounding ensures operational safety and testing accuracy.

2)What scenarios does the self-test function of the MECTP-W120P Instrument Transformer Comprehensive Tester primarily serve? How can the self-test verify the normal operation of the voltage measurement circuit?

Answer: The self-test function checks for instrument damage and verifies the integrity of the measurement circuit (requires a multimeter). To verify the voltage measurement circuit: When selecting voltage testing, short-circuit one S1 to another S1 and one S2 to another S2. Measure the voltage between S1 and S2 using the multimeter's voltage range. If the reading matches the actual voltage displayed by the instrument, it indicates that the device's voltage output and measurement circuitry are functioning correctly.

3)What operations does the report function menu of the MECTP-W120P Instrument Transformer Comprehensive Tester support?

Answer: The report function menu supports four core operations: 1. Open: After selecting a single test report, view its parameter information and data. 2. Import: Import test reports from a USB drive that comply with the instrument's file format. 3. Export: After selecting multiple test reports, export them to a USB drive. 4. Delete: Select unwanted test reports to remove them from the instrument

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