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Step 2: Voltage and Current Inputs
Fig 1.8 Voltage and Current Connector
Voltage Input
Item
Description
Pin name
V
1
, V
2
, V
3
, V
n
Connector
Terminal block
Wire
2.1 to 3.5 mm
2
[ 14 to 12 AWG]
Rating
1
0 ~ 600V 3 ~ L-L[Line to line], 0 ~ 457V 3 ~ L-N[Line to neutral]
Burden
0.02VA/phase @220V
Impedance
3M
Ω
/phase
Compliance
Pollution degree 2, Installation Category
Ⅲ
Caution
In three phase 3 wire open delta direct connection mode, line to line voltage should not exceed
457V because the voltage is applied to the inputs of phase voltage.
PT[Potential Transformer]
PTs are required for all systems with voltage levels greater than these above. The meter inputs can
be used with PTs that have secondaries rated between AC 0V and 457V. PTs should comply with
IEC 61010-1 2
nd
Edition, Pollution Degree 2, Overvoltage Category
Ⅲ
.
Caution
In case where PTs are required, fuses should be installed on the secondary of the PTs.