Emerson 50 and 60 Hz, 400V BCB or, Batt-N, Contactor, Battery Ground Fault Detection

Options—For Assembly Inside the UPS Cabinet

9.1.6Battery Ground Fault Detection

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 from the battery into the PE (Protective Earth) Residual current range monitored: 30~3000mA.

Power supply voltage for the set: AC230V (L-N);

When a battery ground fault is detected, an alarm will appear on the UPS display panel. An additional Dry contact fault Alarm signal is available for remote monitoring:

Table 27 Dry contact fault alarm signal is available for remote monitoring

Terminal	Name	Definition
21	Common	Battery Ground Fault Detection – can be
		programmed as Alarm or Pre-Alarm
22	NC
24	NO

The Battery ground fault detection set contains one CT (current transformer) and one DC sensitive residual current monitor. The connection of this set for UPS is illustrated as follows.

Figure 74 Battery ground fault detection set connections

Battery			Current				BCB or
			Transformer
			W1-A358				Contactor
							X
Batt-N
		K1	K2	I2	I2		Monitor Board
Socket	Output						-U2
	Phase	A1			11	4	+12V
		A2			14	2	IN DRY-X3
	Output					BtG
	Neutral	Battery Ground
							UPS
		Fault Detection
		Resys B470
		(AC230)

The Battery Ground Fault Detection Set is assembled within the UPS cabinet.

108