Ups System Interface Wiring Preparation - Eaton 93E UPS Installation And Operation Manual

3.2.3 UPS System Interface Wiring Preparation

Control wiring for features and options should be connected at the customer interface terminal blocks located
inside the UPS.
Do not directly connect contactor contacts to the mains related circuits. Reinforced insulation is
required before connecting to the mains.
Read and understand the following notes while planning and performing the installation:
• Interface wiring should be rated for 24V, 1A minimum.
• For interface wiring from 30V to 600V, the wire should be rated for 600V, 1A minimum.
• Because of the REPO and building alarm wiring route in the UPS cabinet, the wire should be rated for a
minimum of 300V.
• Use twisted-pair wires for each input and return or common.
• All interface wiring and conduit is to be supplied by the customer.
• When installing external interface wiring between a REPO or building alarm and the UPS interface terminals,
conduit must be installed between each device and the UPS cabinet.
• If using the power terminal wiring channel, keep interface wiring separate from power wiring or use shielded
wire.
• If using conduit, install the interface wiring in separate conduit from the power wiring.
• All building alarm inputs require an isolated normally-open contact or switch (rated at 24 Vdc, 20 mA
minimum) connected between the alarm input and common terminal. All control wiring and switch contacts
are customer-supplied.
• LAN and telephone drops for use with Mini-Slot connectivity cards must be supplied by the customer.
• The REPO feature opens all contactors in the UPS cabinet and isolates power from your critical load. Local
electrical codes may also require tripping upstream protective devices to the UPS.
• The REPO switch must be a latching-type switch not tied to any other circuits.
• A jumper wire must be connected between pins 3 and 4 on the REPO terminal block if using a normally-
closed REPO switch.
• REPO wiring should be a minimum of 0.5~2.0 mm
• The REPO switch wiring must be in accordance with local regulations.
• The maximum distance between the REPO and the UPS cannot exceed 150 metres (500 feet).
WARNING
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Eaton 93E UPS (15-80 kVA, 380/400/415V) Installation and Operation Manual
UPS Installation Plan and Unpacking
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