MGE UPS Systems 40-150kVA user manual Mechanical, Electrical, Proper trip settings

Installation and User Manual

2.4.2Mechanical

The Comet UPS can be mounted on a raised computer room floor, or flush-mounted on a concrete floor. All floors must be level. On a raised floor, conduits can be run below the floor, with cut-outs made in the floor tiles as shown on the installation drawings.

Allow at least three feet of clearance in front of the UPS for normal operation (access to the UPS controls). The Comet requires at least 36 inches top clearance for ventilation.

2.4.3Electrical

Electrical service for the Comet UPS should be supplied on its own dedicated branch circuit. Main input cables and upstream protective devices must be provided and sized per the National Electrical Code (NEC, ANSI/NFPA 70, latest issue), and as appropriate for your load and distribution requirements. Cable sizing data is provided on the installation drawings supplied with the equipment. The Comet 480/480V UPS is not a separately-derived source. The Comet 208/208V UPS is a separately derived source. The neutral must be grounded on a separately derived source (like the Comet 208/208V UPS).

CAUTION	The customer supplied upstream protective device shall open in one cycle
	when 10 times the output rated current is applied or in the event of an output
	short circuit when the unit is working on “Static Switch.”
	Refer to the upstream circuit breaker manufacturer’s characteristic curves for
	proper trip settings.

Table 2-1: Recommended upstream protective device sizing *.

INPUT VOLTAGE	40kVA	50kVA	65kVA	80kVA	100kVA	125kVA	150kVA
208	150A	175A	225A	300A	350A	450A	500A
220	150A	175A	225A	300A	350A	450A	500A
480	70A	80A	100A	125A	150A	200A	225A
600	60A	70A	80A	100A	125A	150A	200A

* Size determined using nominal input currents.

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