Polarity Test Apparatus High Performance Current Voltage Transformer CT PT Vt Tester

Descriptions
CT and PT Tester is the revolutionary testing system for various CTs and PTs according to standards IEC61869-2 (IEC60044-1,60044-6), IEC61869-3(IEC60044-2) and IEEE/ANSI C57.13. The Analyzer can automatically complete the test within seconds by one click of the patented multifunctional rotary mouse. It allows to test the knee-point voltage up to 40kV CTs and PTs on-site in power grids or in manufacturers' production facilities or test labs. 

CT and PT Tester CTP-200 is only 9kg(9.84 lbs), which is easy to carry on testing site.

Main Features
1) Able to test Protection CTs, Measuring CTs, TP class CTs and inductive PTs
2) Test excitation characteristic and error curve based on low-frequency measurement principle
3) Measure ratio, polarity, ratio error and phase displacement error based on voltage method
4) Automatic demagnetization of the CT after test.
5) Adopt patented multifunctional rotary mouse to replace the keypad
6) Adopt 5.7 inches LCD screen for display
7) Adopt DSP, ARM and embedded LINUX operation system
8) Both local test and PC remote test available
9) Higher measurement accuracy: 0.05 %
10) Print test results directly by built-in thermal printer
11) Small and light weight (9kg / 19.84 lbs) for easy transport

Application
-CT/PT excitation and saturation test
-Accuracy measurement of ratio and phase angle
-Secondary loop burden measurement
-Winding resistance measurement
-Saturated and non-saturated inductance test
-Transient CT parameters test
-CT/PT polarity test
-CT nameplate guess

Technical Data
○Test Standard: IEC61869-2(IEC60044-1,60044-6), IEC61869-3(IEC60044-2), IEEE/ANSI C57.13
○Maximum Knee Voltage Measurement: 40kV 

○Output Range:
voltage: 0~180V(RMS)
current: 0~12A(RMS), 36A(peak value) 

○Voltage Measurement Accuracy: ±0.05%
○CT Ratio Measurement:
range:1~30000
accuracy: ±0.05% 

○PT Ratio Measurement:
range:1~10000
accuracy: ±0.05% 

○Phase Measurement:
accuracy: ±2min
resolution: 0.01min 

○Secondary Winding Resistance Measurement:
range: 0~300Ω
accuracy: 0.1%±1mΩ 

○Burden Measurement:
range: 0~300VA
accuracy: 0.1%±0.1VA

 
○Memory Capacity: >3000 groups test results 

○Power Supply

○Environmental Conditions

○Miscellaneous

○Safety Standards, Electromagnetic Compatibility

Ratio error and phase angle error of CT tested by voltage measurement method 

Figure1 CT's equivalence principle diagram

CT's equivalence principle is shown as figure1. As we can know from the figure, the main reason of causing ratio error and phase angle error is the error of excitation loss's current Iex and turns ratio Np/Ns. So for 5%, 20%,100%,120% rated current output, if Iex amplitude and phase position and true turns ratio Np/Ns are known, then the ratio error and angle error of CT at this time can be calculated. The tester calculates the ratio error and phase angle error of CT by the measured turns ratio Np/Ns and excitation loss Iex.

Turns Ratio Np/Ns can be got by inputting voltage on the secondary side under no-load condition and test the primary induced voltage. Iex can be got by test the secondary side's excitation characteristics. Because Iex is determined by the induced electromotive force of secondary circuit, Iex amplitude and phase angle can be got from excitation characteristics. When the secondary current and the secondary load are known, Vex value is also can be got by calculation and get Iex value by checking out the excitation characteristics data table.
CT and PT Tester CTP-200P was showed at THE 9TH INTERNATIONAL EXHIBITION ON ELECTRICAL TECHNOLOGY & EQUIPMENT in SECC, Ho Chi Minh City. 
CT and PT Tester CTP-200P is portable and reliable instrument for testing Current Transformers and Potential Transformers indoor or outdoor. 

CT and PT Tester CTP-200P is calibrated in in the third party laboratory accredited under ISO/IEC 17025. The calibration report is shown as below. 

HAOMAI ELECTRIC POWER AUTOMATION is established in 1999 and located in Wuhan of China, which is specialized in developing and manufacturing electrical power test and measurement instruments. HAOMAI products are widely used in power grid, petrochemical, metallurgy, railway, coal mine, research institutes and all kinds of large-scale factories or enterprises.mainly focuses on the sales and services of Protection Relay Test System, CT/PT Analyzer, Battery Load Tester, Transformer Testing Equipment, Circuit Breaker Analyzer, Partial Discharge Detector etc. electrical power test and measurement instruments.
 
HAOMAI follows total quality criteria, and always maintains standardized process and procedures for continuous growth. HAOMAI has been certified by ISO 9001:2015, ISO 14001:2015 and OHSAS 18001:2007.
 
HAOMAI builds own RELAYSTAR laboratory and performance test laboratory, and possesses professional production equipment and testing instruments in factory, such as Agilent 34401A 6 1/2 High-precision Meter, FLUKE Multi-meter, EMH Standard Meter, CLOU Standard Power Source, Oscilloscope, Phase Meter, Insulation Test System, High Voltage Dividers, AC High Voltage Generator, Time Calibration Tester, Standard Micro-resistance etc.
 
HAOMAI is China well-known mark recognized and approved by State Administration for Industry & Commerce of People's Republic of China, and enjoys high reputation in domestic and foreign markets.
 
HAOMAI now is the key supplier for SGCC(State Grid Corporation of China) and CSG(China Southern Power Grid). Till 2018 HAOMAI products have been sold to 34 different countries. 
 
HAOMAI always sticks to the faith of "cooperation and sharing", takes the "technology and market" as the direction, "creation and innovation" as the soul, listens to clients carefully, and improves the technology, upgrades the products, optimizes the service and tries all to be the global leader in electrical power test and measurement instruments field.