Three Phase 5A Adapter; Connecting To A Secondary Current Transformer (Ct) - AEMC PowerPad 3945 User Manual

Factors affecting accuracy
Conditions
Temperature
Relative humidity
Battery voltage
Position of a
20mm Ø 20 conductor
Live adjacent conductor
External fi eld
Rejection in common mode (AC)
Remanence in DC
Frequency of the
measurement signal

3.10 Three Phase 5A Adapter

The three phase transducer has three 5A
three output AC voltage circuits. All circuits are independent and isolated between
input and output. The output connectors are designed for use with the Model 3945
PowerPad™ with automatic sensor recognition and measurement adjustment.
The input connections accept either Ø4mm male plugs or rigid leads between 1 and
2.5mm 2 copper section inserted in the bottom hole after pressing on the connector.
Caution: This adapter can be used on measurement Category III
for voltages not exceeding 300V in relation to the ground according
to IEC 61010.

3.10.1 Connecting to a secondary current transformer (CT)

1. Make a short circuit between the two leads of each secondary current mea-
surement 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 paying attention to
the direction of the current fl ow (ground on P2) and the right phase order L1,
L2, L3.
22
(% of the output signal)
Range
64 to 82°F (18 to 28°C)
10 to 90% RH
6.5 to 10V
DC at 440Hz
DC at 1 Hz
DC at 2Hz
DC at 5Hz
50 and 60Hz
400 A/m
50 to 400Hz
+1300A at -1300A
DC
65Hz to 440Hz
440Hz to 1kHz
1kHz to 10kHz
input current circuits L1, L2, L3 and
AC
Ζerο: ≤2 A/°C
Scale: ≤300ppm/°C or
0.5% of Reading
<0.5% of Reading
<1% of Reading
<3% of Reading
<10% of Reading
<10mA/A
DC
Power Quality Analyzer Model 3945
Error
0.3%/10°C
≤1 A/V
(1" from clamp)
AC
<1.3A
>65dB
<4mA/A
-2%
-5%
-4dB