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HES-1E Low-Voltage PT Accuracy Testing System


1. Type of tested object: Low-Voltage PT

2. Type of object PT: Voltage Input / Voltage Output

3. Measure item: Ratio errors & Phase errors of the Small-Voltage PT

4. Testing system included:

HES-1E Low-Voltage PT Tester 

HJF-2 Inductive Voltage Divider

HES PT Test Power

5. Main Technical Datas:

1). HES-1E Low-Voltage PT Tester (Bridge)

Product model:HES-1E
Display model:LED
Measure item:Ratio errors & Phase errors of the low-Voltage PT&CT
Rated voltage:22.5mV, 150mV, 200mV, 225mV, 1.5V, 1.625V, 2V, 3.25V, 4V, 6.25V
Multiplier:1/3, 1/2, 1/√3, 1
Accuracy class:±2%
Operation range:(20%-120%).Un
Ratio error range:±0.001% ~ ±19.99%(Two positions: 1.999%, 19.99%)
Minimum resolution:0.001%.
Phase error range:0.1' ~ ±900'(Two positions: 90.0', 900')
Minimum resolution: 0.1'
Alarm Function:Provided the sound & light alarm function when the polarity abnormal or ratio inconsistent.
Input Load:- On Standard side: >10MΩ, COS==1.0
- On Test Object side: >10MΩ, COS==1.0
Communication Interface:Provided the RS232 serial communication interface
Power supply:AC 220V±10%
Power consumption:< 20VA

2) HJF-2 Inductive Voltage Divider 

Accuracy Class:0.005%
Input Voltage:AC 100V, 150V, 300V, 600V (AC 0~600V)
Variablle Output Voltage:AC 0- 11.111V
Power Factor:COSΦ=1.0
Operating Range:(20%-120%) x Un
Operating Condition:Temperature: 10 oC~+40 oC

Relative Humidity (RH): up to 85% (max 90%)

3) HES PT Test Power

Input Voltage:AC 220V±10%  50/60Hz
Output Current:AC 5A, 50A, 100A
Rated Capacity:~500VA
Output Voltage:Provided the Coarse adjustment & Fine adjustment
Adjustment Model:Manual adjustment