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Fig 1
Fig 2
Fig 3
Fig 4
1 Powerpact 4 250A powerboard
The Powerpact 4 250A powerboard can be mounted horizontally or
vertically to allow maximum flexibility of cable entries. Do not drill on
busbar elevation, i.e. top of enclosure. To allow the installation of the
Compact NSX MCCB or switch disconnector a factory fitted cassette is
added to the device. The board is also available with cut-outs to accept
meters. For each 3 or 4 pole breaker to be metered a current transformer
and a meter should be ordered separately. Fit the meters according to
section 8.2 d-e. Instead of an auxiliary busbar a terminal bar is supplied.
1.1 Fitting an incoming MCCB or switch disconnector
The incomer can be situated anywhere along the busbar stack, however
we recommend fixing on the left (if board is mounted horizontal). Ensure
that the main incomer label is fitted adjacent to the incoming device.
Remove the front cover from the panelboard by loosening the 4 captive
screws.
Check if the jaws of the cassette on the device are fully open (Fig 1).
a. Place the incoming device onto the mounting plate. Push the cassette
onto the bars (Fig 2).
b. Fix the device to the mounting plate using an M5 bolt (Fig 3).
c. Tighten shear head bolts on cassette using a 17mm A/F socket or ring
spanner (Fig 4). The top half of the hexagon head will shear off when
the required tightening torque is reached.
d. Note: Prepare yourself for this action and ensure you do not slip when
the bolt head shears off.
e. Place the terminal shield on the incoming device and screw down with
the two fixing screws (Fig 5).
f. If adjustable MCCBs are fitted set them according to the setting guide
in section 12.
g. Reverse procedure to remove an incoming device. For removing or
refitting an incoming device with sheared off bolts use a 17mm 12 point
socket (for refitting in combination with a torque wrench set to 20 Nm).
1.2 Fitting outgoing MCCBs
Fitting outgoing devices is the same as incoming devices. See 1.1.
1.3 Blanking plates
a. Any unused outgoing way must be shrouded with a blanking plate.
Blanking plates should be fitted before refitting door and cover
assembly.
Push the blanking plate into the slot on top of the busbar shrouding,
which runs down the centre of the busbars on all unused outgoing
ways (Fig 6).
b. Clip the other end of the blanking plate into the mounting plate (Fig 7).
Fig 5
Fig 6
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Fig 7
Fig 8
Fig 9
Fig 10
Fig 11
2 Powerpact 4 250A panelboard
The Powerpact 250A panelboard will accept top or bottom entry main
cable without modification (The board has to be inverted for top entry). The
board is designed to accept either 3 or 4 pole incoming devices can be a
MCCB or a switch disconnector. To allow the
installation of the Compact NS MCCB or switch disconnector a factory
fitted cassette is added to the device.
2.1 Fitting an incoming MCCB or switch disconnector
a. Remove incoming transparent shroud fitted at the bottom right of the
board (Fig 8).
b. follow step 1.1 b-e.
c. Connect the incoming cable using 25mm max width crimps and M6/M8
bolts. The required tightening torques for the bolts are: 100A M6 10Nm
and 160/250A M8 15Nm.
d. If adjustable MCCBs are fitted set them according to the setting guide
in section 12.
e. Reverse procedure to remove an incoming device. For removing or
refitting an incoming device with sheared off bolts use a 17mm 12 point
socket (for refitting in combination with a torque wrench set to 20 Nm).
2.2 Fitting outgoing MCCBs
a. Check if the jaws of the cassette on the device are fully open (Fig 1)
b. Align the circuit breaker into position and push onto bars (Fig 9).
c. Fix the device to the mounting plate using an M5 bolt (Fig 10).
d. Tighten shear head bolts on cassette using a 17mm A/F socket or ring
spanner (Fig 11). The top half of the hexagon head will shear off when
the required tightening torque is reached.
e. Note: Prepare yourself for this action and ensure you do not slip when
the bolt head shears off.
f. Connect the cables using 25mm max width crimps. Tightening torque
for the bolts are: 100A M6 10Nm and 160/250A M8 15 Nm.
g. If adjustable MCCBs are fitted set them according to the setting guide
in section 12.
h. Reverse procedure to remove an outgoing MCCB. For removing or
refitting an outgoing MCCB with sheared off bolts use a 17mm 12 point
socket (for refitting in combination with a torque wrench set to 20 Nm).
2.3 Blanking plates
Any unused outgoing way must be shrouded with a blanking plate. See
section 1.3 for fitting blanking plates.
3 Powerpact 4 400/630A panelboard
The Powerpact 400/630A panelboard can be inverted for top entry. The
board is supplied with a spare set of labels to correctly label the board.
Ensure that a top entry incoming device is selected. The board is designed
to accept either 3 or 4 pole incoming devices.
The incomer rating can be a 250A, 400A or 630A and can be a MCCB or a
switch disconnector. The incoming device can also be a direct incomer kit.
To allow the installation of the Compact NSX MCCB or switch disconnector
a factory fitted cassette is added to the device.
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