Power Quality Analyzer Model 3945-B
29
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
(add PowerPad
®
accuracy ±0.5% ± 1ct)
Currents < (Primary x 5) ÷ (Secondary x 1000) will be displayed as zero on
the PowerPad
®
with this probe.
Range:
5A
Output / Input Ratio:
0.2mV/mA
AC
Dimensions:
6.00 x 3.74 x 3.38" (153 x 95 x 86mm)
Weight:
1.98 lbs (900g)
Impermeability:
IP50 per EN 60529 (electrical IP2X for the terminals)
Electrical safety:
Double Insulation, 300V CAT III
Pollution Degree 2 per IEC 61010-1
Operating Temperature:
5° to 131°F (-15° to 55°C), 0 to 90% RH
Storage Temperature:
-40° to 185°F (-40° to 85°C), 0 to 90% RH
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
5mA to 50mA
50mA to 1A
1A to 6A
Error %
0.35% + 1.5mA
0.25% + 1mA
0.25% + 0.5mA
Phase Error
0.5°
0.4°
0.33°
Primary Voltage Loss:
< 0.3V
Permanent Overload:
10A
Temperature Influence:
< 0.1% par 25K
Frequency Influence
65Hz to 500Hz
500Hz to 1kHz
1kHz to 5kHz
Error
0.1%
0.3%
0.5%
Phase error
0.1°
0.2°
1°