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9395P 250 kVA / 275 kVA / 300 kVA
User’s and Installation Guide
4.5
Distributed Bypass Tie Cabinet Installation
NOTE
The tie cabinet must contain Module Output Breakers (MOBs) with dual auxiliary contacts for
control of the system. Without dual auxiliary MOBs, UPMs are not allowed to go to bypass
individually during servicing. All UPMs will go to bypass instead of only the UPM needing
service, decreasing critical load protection. With dual auxiliary MOBs, one UPM can be
bypassed while the remaining UPMs support the load as long as the remaining UPMs have the
capacity to do so.
If installing a distributed bypass system, install the customer-supplied tie cabinet or distribution panel
according to the tie cabinet or distribution panel manufacturer's instructions and all applicable codes
and regulations, including the NEC, Article 480. After the tie cabinet is installed, proceed to
paragraph 4.6 to complete the wiring of the UPS.
4.6 Installing UPS external and battery power wiring
NOTE
• The UPS cabinet is shipped with a debris shield covering the ventilation grill on top of the unit
(see Figure
4‐4).
Do not remove the debris shield until installation is complete. However,
remove the shield before operating the UPS. Once the debris shield is removed, do not place
objects on the ventilation grill.
• Remove the UPS cabinet top or bottom conduit landing plate to drill or punch conduit holes
(see Figure
4‐4).
• If the load requires a neutral, a bypass source neutral must be provided.
Use the procedures in the following sections to connect the external and battery power wiring.
• DO NOT install both a source neutral and a bonding jumper. See
Table 3‐7 for
neutral
bonding jumper wire sizes. Bonding jumper must be copper wire.
CAUTION
• The UPS cabinet is shipped with a debris shield covering the ventilation grill on top of the unit
(see Figure
4‐4).
Do not remove the debris shield until installation is complete. However,
remove the shield before operating the UPS. Once the debris shield is removed, do not place
objects on the ventilation grill.
Summary of Contents for Power Xpert 9395P 250 kVA
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