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HES-1W Low-Current CT Accuracy Testing System


1. Type of tested object: Low-Current CT

2. Type of object CT: Current Input / Current Output

3. Measure item: Ratio errors & Phase errors of the Small-Current CT

4. Testing system included:

HES-1W Low-Current CT Tester

HLW-3 Two-Stage Standard Current Transformer

HES CT Test Power

5.Main Technical Datas:

1) HES-1W Low-Current CT Tester (Bridge)

Product model:HES-1W
Display model:LED
Measure item:Ratio errors & Phase errors of the low-Current CT
Rated current:1mA, 2mA, 5mA, 20mA, 50mA
Multiplier:0.5, 1, 1.5, 2, 3
Accuracy class:±2%
Operation range:(1%-200%).In
Ratio error range:±0.0001% ~ ±19.99%(Three positions: 1.999', 19.99', 199.9')
Minimum resolution:0.0001%.
Phase error range:0.01' ~ ±900'(three positions: 9.00', 90.0', 900')
Minimum resolution: 0.01'
Alarm Function:Provided the sound & light alarm function when the polarity abnormal or ratio inconsistent.
Provided load for object CT:0Ω, 5Ω, 10Ω, 20Ω, 30Ω, 50Ω, 100Ω, 200Ω, 250Ω, 500Ω (COSφ=1.0)
Input load on standard side:10Ω (COSφ=1.0)
Communication Interface:Provided the RS232 serial communication interface
Power supply:AC 220V ± 10%
Power consumption:< 20VA

2) HLW-3 Two-Satge Standard Current Transformer

Product Description:HLW-3 Two-Stage Current Transformer
Primary Current (A):0.6,1,1.5,2.5,3,4,5,6,7.5,8,10,15,20,30,50,60
Secondary Current (mA):1, 1.5,2,2.5,3,10/3,4,5,20/3,7.5,8,10,15,50/3,20,25,30,100/3,50
Rated Current Ratio:Arbitrary combination of Pri,Current and Sec.Current
Accuracy Class:0.02%
Operation Range:(5%-300%).In
Secondary Burden:10Ω
Power Factor:COSΦ=1.0
Voltage Level:AC 600V
Operating Condition:Temperature: -5 oC ~ +40 oC
Relative Humidity (RH): up to 85% (max 90%)
Dimension (mm) :460x380x160
Weight ( kg ):~15kgs

3) HES CT 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