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3.12.1 Connecting to Secondary Current Transformer (CT)
WARNING: Use caution when connecting to a secondary current trans-
former.
1.
Short the two leads of each secondary current measurement transformer.
2.
Never open a secondary circuit of a CT if its primary circuit is connected to a
supply voltage. In any case, disconnect the primary measurement transformer
circuit from the supply network.
3.
Connect each CT secondary to the input of the 5A adapter in the correct order
(ground on P2) and the right phase order L1, L2, L3.
3.12.2 Specifications
Currents < (Primary x 5) ÷ (Secondary x 1000) will be displayed as zero on
the PowerPad
Range:
Output / Input Ratio:
Dimensions:
Weight:
Impermeability:
Electrical safety:
Operating Temperature: 5° to 131°F (-15° to 55°C), 0 to 90% RH
Storage Temperature:
Reference Conditions: 73°F (23°C) ±3K, 50 to 85% RH, 50/60Hz ±2Hz
Current measurement according to IEC 44-1 Class 0.5
Range
Error %
Phase Error
Primary Voltage Loss: < 0.3V
Permanent Overload:
Temperature Influence: < 0.1% par 25K
Frequency Influence
Error
Phase error
Power Quality Analyzer Model 3945-B
(add PowerPad
with this probe.
®
5A
0.2mV/mA
AC
6.00 x 3.74 x 3.38" (153 x 95 x 86mm)
1.98 lbs (900g)
IP50 per EN 60529 (electrical IP2X for the terminals)
Double Insulation, 300V CAT III
Pollution Degree 2 per IEC 61010-1
-40° to 185°F (-40° to 85°C), 0 to 90% RH
5mA to 50mA
0.35% + 1.5mA
0.5°
10A
65Hz to 500Hz
0.1%
0.1°
accuracy ±0.5% ± 1ct)
®
50mA to 1A
0.25% + 1mA
0.4°
500Hz to 1kHz
0.3%
0.2°
1A to 6A
0.25% + 0.5mA
0.33°
1kHz to 5kHz
0.5%
1°
29
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