Battery Installation

4.5Battery Ground Fault Detection Set

In addition to any residual current device mounted externally and upstream the UPS or when optional isolation transformers are fitted to the UPS, an optional residual battery current device can be fitted to detect leakage current so as to ensure the normal operation of the system. Residual current range monitored: 30mA ~ 3000mA.

Power supply: 208VAC (L-L)

When a battery ground fault is detected, an alarm will appear on the UPS display panel.

The battery ground fault detection set contains one current transformer and one DC-sensitive residual current monitor. The connection of this set for UPS is shown in Figure 24.

Figure 24 Wiring of battery ground fault detection set

 

 

 

 

 

Current Transformer

 

 

Battery

 

 

 

 

W4-A140S

Battery Cabinet

 

 

 

 

 

 

 

Cabinet

 

 

 

 

 

 

 

Breaker

Batt_+

 

 

 

 

 

 

X

Batt_N

 

 

 

 

 

 

 

Batt_-

 

 

 

 

 

 

 

X

 

 

 

 

K1

K2

I2

I2

 

Static Bypass

 

 

 

 

 

Module

 

 

 

 

 

 

 

 

 

 

 

 

+15V

 

 

 

 

4

+12V

208VAC

 

UHW241M5

GND

J1

 

 

J5

2

 

 

-15V

 

 

BAT_GND

 

Power Board

 

 

 

 

 

 

 

 

Battery Ground

J9

 

 

 

 

 

APM

 

 

 

 

Fault Detection Device

 

 

 

 

 

 

 

ULC3661SCI

 

 

 

4.6Non-Standard Batteries

When batteries other than a matching battery cabinet are used, a remote battery disconnect switch with overcurrent protection is required per the National Electrical Code. Contact your local Emerson sales representative about this option. Refer to Figures 67 and 68 for details.

Install battery racks, cabinets and batteries in accordance with the manufacturer's instructions.

Verify that the battery area has adequate ventilation and battery operating temperature complies with the manufacturer's specifications and with all applicable national and local codes.

If you have any questions concerning batteries, battery racks or accessories, contact Liebert Services at 1-800-543-2378.

NOTE

The user-supplied battery DC bypass breakers or fuses should have a minimum overload rating of 8kA and 500V.

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Image 54
Emerson 115-120, 15-90KVA, 115-208, 115-480 Battery Ground Fault Detection Set, Non-Standard Batteries, Cabinet, Batt+ BattN
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115-600V, 115-208, 115-120, 115-50/60HZ, 115-480 specifications

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