Installation guide

1027574 UPS 450-550 kVA (2x225 - 2x275 kVA) 19
Revision E User’s and Installation Guide
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 as described in Chapter 5: “Installing options and accessories”.
WARNING
Do not directly connect relay contacts to the mains related circuits. Reinforced insulation to the
mains is required.
Read and understand the following notes while planning and performing the installation:
• Install the interface wiring (for example, building alarm, relay output, battery breaker trip, and X-
Slot) separate from the power wiring. The wiring should have double insulation and rated at Uo/U =
300/500 Volts.
• All interface wiring is to be provided by the customer.
• When installing internal interface wiring to X-Slot terminals, route the wiring through the internal
opening in the X-Slot communication bay.
• All building alarm inputs or remote features 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 relay and switch contacts are customer-supplied. Use twisted-pair wires for each
alarm input and common.
• The building alarms can be programmed to display the alarm functional name.
• LAN and telephone drops for use with X-Slot cards must be provided by facility planners or the
customer.
• The UPS Battery Aux and 48 Vdc Shunt Trip signal wiring from the UPS must be connected to the
DC source disconnect device.
• Battery Aux and 48 Vdc Shunt Trip wiring should be a minimum of 1.5 mm
2
.
• The Remote EPO 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 Remote EPO switch must be a dedicated switch not tied to any other circuits.
• A jumper wire must be connected between pins 1 and 2 on TB1, if the normally-closed Remote
EPO contact is not used.
• Remote EPO wiring should be a minimum of 0.75 mm
2
and a maximum of 2.5 mm
2
.
• The maximum distance between the Remote EPO and the UPS cannot exceed 150 meters.
• Alarm relay contacts have a maximum current rating of 5A and a switched voltage rating of 30 Vac
and 28 Vdc.
• Alarm relay wiring should be a minimum of 0.75 mm
2
.