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Powerpact 4 panelboards
Metering facilities for
incoming and outgoing
circuits
Technical
Section 9
Dimensions
Section 10
The arrangement consists of side extension boxes that house the meters and also
provide additional cabling space. Meters and current transformers are ordered
separately to meet the needs of the installation. The necessary cable looms are
included wi th the steelwork. The meters are mounted on hinged doors. The box
also contains the auxiliary busbar that provides the 240V control supply for the
meters. The left hand extensions have sufficient meter positions for half the number
of outgoing ways. The right hand extensions have positions for half the number of
outgoing ways plus three additional positions. These extra positions may be used
for additional metering or mounting surge arresters, control fuses etc. The lower
two positions have a transparent window and DIN rail. This can be removed if not
required.
Note: the meters, CT modules and surge arresters must be ordered separately
Incoming and outgoing metering for boards up to 630A
(This arrangement is not applicable for boards fitted with MGPINC direct
connections).
When both incoming and outgoing metering is required there is a very cost
effective solution by incorporating the incoming metering into the right hand side
extension box. Components required are:
n
Standard extension box MG6CEX to provide the required cable spreading space
n
Current transformer module to fit on line side of incoming breaker.
n
PM750MG meter.
n
Two MGPC2025 corner units, optional
The meter should be cabled to the CT module according to the diagram supplied.
(loom not supplied). The auxiliary supply to the meter should be taken from one
phase and neutral and must be suitably fused.
Note. A warning notice should be placed in the board as the voltage connections
are taken off the live side of the main breaker.
MG6Cxx 630A board
Incoming metering kit 400A
MG64M
630A
MG66M
MG8Cxx 800A board
Incoming metering kit 800A
MG88M
630A & 800A outgoing metering side extension boxes
6 way board
Left hand side (*)
3 meter positions
MGPCM6L
Right hand side (*) 7 meter positions
MGPCM6R
12 way board
Left hand side (*)
6 meter positions
MGPCM12L
Right hand side (*) 9 meter positions
MGPCM12R
18 way board
Left hand side (*)
9 meter positions
MGPCM18L
Right hand side (*) 11 meter positions
MGPCM18R
(*) When the board is inverted for top entry main cables these side extensions fit
on the other side of the board.