CT PT Analyzer Manufacturer for Accurate Current Transformer and Voltage Transformer Testing and Performance Analysis
The CTA-4000 Series CT PT Analyzer is an automated diagnostic test set engineered for current transformers (CT) and voltage/potential transformers (PT). Operating on the low-frequency test method, it evaluates excitation characteristics, ratio, phase displacement, winding resistance, and burden across 1 kV to 500 kV substation classes. Built for high-efficiency commissioning and factory quality control, the system completes multi-parameter evaluation in a single automated test cycle.
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Current Transformer Field Tester• The NRH70C is a next-generation on-site calibration instrument for current transformers (CTs) and voltage transformers (VTs).. • It eliminates the need for standard CTs, boosters, load boxes, and -
![Instrument Transformer Comprehensive Tester]()
Instrument Transformer Comprehensive TesterThe NRHG902 Instrument Transformer Comprehensive Tester is designed for field and laboratory testing of current transformers (CT) and voltage transformers (VT). Key features include:. • Compliant
Standards & Calibration
IEC 60044-1 / IEC 61869-2:
Instrument transformers — Part 2: Additional requirements for current transformers.
IEEE C57.13:
IEEE Standard Requirements for Instrument Transformers.
IEC 60044-2 / IEC 61869-3:
Instrument transformers — Part 3: Additional requirements for inductive voltage transformers.
raceable Calibration:
T Each unit is factory-calibrated using reference standards traceable to ISO/IEC 17025 accredited laboratories. Calibration reports include excitation linearity, ratio error verification, and phase displacement validation.
Product Series
|
Model |
Application Scope |
Max Excitation Voltage / Current |
Core Feature |
|
Field Portable |
On-site substation commissioning & routine maintenance |
1000V / 5A |
Lightweight field chassis, battery/AC dual power, automated report generation |
|
Substation Master |
High-voltage transmission substations & heavy-duty CTs |
2500V / 10A |
High knee-point voltage testing, multi-tap automated switching unit |
|
Factory Benchtop |
Instrument transformer manufacturing QA & lab testing |
2500V / 600A (Primary injection) |
PLC integration, barcode scanner interface, batch data export for production lines |
Technical Specifications
|
Parameter |
Specification |
Test Method / Standard |
|
Excitation Characteristic Test |
Output Voltage: 0V to 2500V; Output Current: 0A to 10A (Accuracy: plus/minus 0.5 percent reading) |
Low-Frequency Voltage/Current Injection |
|
CT Ratio Measurement Range |
1 A to 25,000 A / 1 A or 5 A |
Automatic Ratio Calculation |
|
CT Ratio Measurement Accuracy |
Plus/minus 0.05 percent |
Comparison against Standard Reference |
|
Phase Displacement Accuracy |
Plus/minus 1 minute (Resolution: 0.1 min) |
Vector Analysis via DSP |
|
Winding Resistance Measurement |
Range: 0 to 300 ohms (Accuracy: plus/minus 0.2 percent plus 2 digits) |
DC Two-Terminal / Four-Terminal Method |
|
Burden Measurement Range |
0 to 300 VA (Accuracy: plus/minus 0.5 percent plus 2 digits) |
Secondary Load Simulation |
|
Knee Point Detection |
Automatic calculation of 10 percent and 5 percent error curves |
IEC / IEEE Automated Algorithm |
|
Display & Control |
8.4-inch sunlight-readable TFT touch screen |
Embedded Industrial Linux OS |
|
Data Storage & Interface |
10,000 test records, dual USB host ports, Ethernet |
USB flash drive export (Excel / PDF) |
|
Power Supply |
AC 220V plus/minus 10 percent, 50 Hz/60 Hz |
Built-in Overload & Short-Circuit Protection |
|
Ingress Protection & Enclosure |
IP65 (lid closed), Ruggedized transit case |
IEC 60529 standard enclosure |
|
Dimensions & Weight |
460 mm x 350 mm x 200 mm; 9.8 kg (main unit) |
Portable Field Chassis |
Applications
Substation Commissioning:
Routine acceptance testing of newly installed current and voltage transformers in high-voltage switchyards prior to grid energization.
Preventive Maintenance Outages:
Annual diagnostic evaluation of insulation degradation, core saturation limits, and winding resistance changes in operating substations.
Protection Class Verification:
Rapid verification of metering and protection class accuracy limits (e.g., 5P, 10P, TPS, TPX classes) under simulated fault conditions.
Transformer Manufacturing Quality Control:
Final production line inspection of tap ratios, polarity, and excitation knee-points for instrument transformer manufacturers.
Our production facility operates under an ISO 9001:2015 certified quality management system dedicated to precision electrical test equipment:
Component Burn-in Screening: Power amplifier modules and DSP boards undergo 48-hour thermal aging and full-load stress testing at 50 degrees Celsius prior to assembly.
Precision Signal Calibration: Internal reference channels are calibrated using automated multi-channel digital calibrators to guarantee ratio and phase accuracy across all temperature ranges.
OEM / ODM Customization Support:
Customized software user interface localized for regional utility test standards.
Specialized hardware interfaces and test lead configurations for non-standard bushing CTs.
Private labeling and custom front-panel branding for equipment distributors.
Factory Show
FAQ
Q: How does the analyzer test CT excitation characteristics without high-voltage external supplies?
A: The unit utilizes an internal high-voltage, low-frequency programmable power source. By injecting low-frequency test signals (typically 25 Hz or 50 Hz equivalent), it safely sweeps up to 2500V to generate complete excitation curves without requiring bulky step-up transformers on site.
Q: Can this analyzer test multi-tap current transformers automatically?
A: Yes. The software automatically steps through all tap combinations sequentially once the wiring is connected. It records and plots excitation curves, ratios, and winding resistances for every tap ratio without requiring manual reconnections.
Q: Does the instrument automatically calculate knee point voltages?
A: Yes. The embedded microprocessor automatically processes the voltage and current data pairs captured during the test and calculates the 10 percent and 5 percent knee-point voltages and currents according to IEC and IEEE standards, displaying the results directly on screen.
Q: How are test results exported and compiled into utility reports?
A: Test data is saved in internal memory and can be exported directly via USB flash drive in standard PDF or Excel formats. The included PC reporting software allows test engineers to compile raw data, generate audit-ready reports, and archive historical trends.
Q: What is the maximum primary current simulation for CT burden testing?
A: The system simulates secondary burden loads from 0 to 300 VA directly at the transformer terminals, evaluating secondary loop impedance and performance under rated operational burdens.
Q: What calibration documents are provided with the shipment?
A: Each analyzer ships with a factory inspection report, an electrical safety compliance certificate, and an ISO/IEC 17025 traceable calibration certificate detailing measured errors for ratio, phase, and resistance.
Request for Quotation
Need a robust, high-accuracy CT/PT testing solution for utility fleets or distribution inventory?
Contact our technical application team for detailed engineering documentation, tender specifications, or factory-direct procurement options.
Email: wang@transformer-test.com
Lead Time: 5 to 10 business days for standard stock units; 15 to 20 business days for custom OEM branding or specialized software languages.
Package Includes: CT PT Analyzer Main Unit, Power Cord, Dedicated Test Lead Set (Kelvin clips and high-voltage leads), Grounding Cable, USB Flash Drive with PC Software, Calibration Certificate, Rugged Transit Transport Case.
Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the most reliable ct pt analyzer manufacturers and suppliers in China, also supports customized service. Please feel free to wholesale advanced ct pt analyzer at competitive price from our factory. Contact us for quotation.
CT Field Tester, Instrument Transformer Tester, Current Transformer Field Tester
