EPO in Parallel Systems

In parallel systems each UPS unit must have its own dry contact (voltage free) connected to J108. The drawing below shows a “Normally Closed” installation of three UPS units in parallel.

WARNING: For parallel and separate systems with common EPO, each UPS unit must be connected to a separate dry contact.

WARNING: Parallel EPO wiring between more UPS units can result in critical UPS malfunctioning.

990-1957C-001 MGE™ Galaxy™ 3500 10-30 kVA 208/220 V Single and Parallel Installation

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