Powerware 650825 kVA operation manual Distributed Bypass Power Wiring Preparation

UPS INSTALLATION PLAN AND UNPACKING

SThe REPO switch wiring must be in accordance with NEC Article 725 Class 2 requirements.

SThe maximum distance between the REPO and the UPS cannot exceed 150 meters (500 feet).

SAlarm relay contacts have a maximum current rating of 5A and a switched voltage rating of 30 Vac and 28 Vdc.

SAlarm relay wiring should be a minimum of 22 AWG.

3.2.4Distributed Bypass Power Wiring Preparation

Read and understand the following notes while planning and performing the installation:

SAll distributed bypass UPS rectifier inputs must come from one source and all bypass input feeds must come from one source.

SDistributed bypass UPS input wiring size requirements and output wiring size requirements from the UPSs to the tie cabinet or distribution panel are the same as listed in Table 3-4on page 3−9 and Table 3-5on page 3−10.

SIf the load requires a neutral, a bypass source neutral must be provided. If the load does not require a neutral and there is no neutral conductor connected at the bypass input, a neutral to ground bonding jumper must be installed. Install neutral conductors from the UPSs to the common point of connection (tie cabinet), and then install a system neutral to ground bonding jumper. The bonding jumper must be copper wire. DO NOT install both a source neutral and a bonding jumper.

If the recommended system neutral bonding jumper installation method cannot be accomplished, each UPS should have a separate neutral to ground bonding jumper installed. See Table 3-4or Table 3-5for UPS neutral bonding jumper wire sizes. The bonding jumper must be copper wire. DO NOT install both a source neutral and a bonding jumper.

SThe UPS cannot be installed in a high−resistance ground application.

SMOBs with dual auxiliary contacts are to be provided by the customer. Table 3-16on page 3−17 lists the recommended rating for the MOBs.

3−20 EATON Powerware® 9395 UPS (650–825 kVA) Installation and Operation Manual S 164201725 Rev 2 www.powerware.com