Ups System Interface Wiring Preparation; Table 3-9. Recommended Dc Input Battery Disconnect Circuit Breaker Ratings - Eaton 93PM Installation And Operation Manual

There is no manual DC disconnect device within the UPS.
Battery voltage is computed at 2 volts per cell as defined by Article 480 of the NEC. Rated battery current is
computed based on 2 volts per cell.
External DC input overcurrent protection and disconnect switch is to be supplied by the customer. Table 3-9
lists the maximum ratings for continuous-duty rated circuit breakers satisfying the criteria for both.
Recommended disconnect size is based on a maximum full load discharge time less than 3 hours. For longer
discharge times a larger disconnect may be required.

Table 3-9. Recommended DC Input Battery Disconnect Circuit Breaker Ratings

UPS Model
Eaton 93PM-100
Eaton 93PM-100
Eaton 93PM-100
Eaton 93PM-100
Eaton 93PM-100
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 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:
Use Class 1 wiring methods (as defined by the NEC) for interface wiring from 30V to 600V. The wire should
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be rated for 600V, 1A minimum. 12 AWG maximum wire size.
Use Class 2 wiring methods (as defined by the NEC) for interface wiring up to 30V. The wire should be rated
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for 24V, 1A minimum.
Because of the battery shunt trip and battery detect (battery aux) wiring route in the UPS cabinet, the wire
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should be rated for a minimum of 300V.
Use twisted-pair wires for each input and return or common.
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All interface wiring and conduit is to be supplied by the customer.
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When installing external interface wiring between a building alarm, relay output, battery breaker trip, or
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Minislot and the UPS interface terminals, conduit must be installed between each device and the UPS
cabinet.
If using conduit, install the interface wiring in separate conduit from the power wiring.
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All building alarm inputs require an isolated normally-open contact or switch (rated at 24 Vdc, 20 mA
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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 Minislot connectivity cards must be supplied by the customer.
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The UPS battery aux signal wiring from the UPS must be connected to the battery disconnect device.
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Eaton 93PM UPS (60–100 kW, 480V) Installation and Operation Manual P-164000227—Rev 2
Output Rating
UPS Rating
60 kW
70 kW
80 kW
90 kW
100 kW
WARNING
UPS Installation Plan and Unpacking
480V
200A
225A
250A
300A
300A
www.eaton.com/powerquality 3-15