Emerson 400V, 50 and 60 Hz, 30-200kVA user manual Battery Cabinet, Bypass Current Sharing Inductors

Options—For Assembly Inside the UPS Cabinet

Figure 72 Battery Start Option for UPS with external battery

Blue

Green

Red

1 GND

2 IN

3 P12

TMP-2

Temperature

Transport

GND4
OUT	3
P12	2

OT6-4 LM35

+

Batt-P

Contactor

Auxiliary Contact

Main Contact

Contactor

Control Coil

J12-33

J12-34

+

Batt-P

J15-1

J15-2

X7
2	3	4

Monitor Board

-U2

Batt-N

-

Battery

Cabinet

									Detection Board
Soft-In						Soft-Out			-M4
	Battery Black-Start						Black-Start Resistor
			Board
	1 2			-1	-2	P-Bus		P-Bus
		X2- X2-		X1	X1	N-Line		N-Line
				P		N
	C			NO		Black-Start LED
+	Manual Press-Button					AL6-M				UPS
	(AB6M)

Batt-N

NOTE

Battery contactor opens after Inverter shutdown at end of battery discharge. Battery Start settings disable the end of discharge trip command to external battery circuit breaker.

9.1.5Bypass Current Sharing Inductors

Applicable in paralleled UPS configurations to ensure that the (passive) static bypass switches, when activated, share the load current. The inductors provide droop type current compensation for the oth- erwise inherent current dispersion due to SCR and cable impedance differences.

Table 26 Bypass current sharing inductors-dimensions, values

	Dimensions	Inductor
UPS	WxLxH, mm (in)	Value (uH)
30/ 40 kVA	70x100x140	122
	(2.8x3.9x5.5)
60/80 kVA	140x100x200	65
	(5.5x3.9x7.9)
100/120kVA	210x100x250	40
	(8.3x3.9x9.8)
140/160kVA	160x190x240	26
	(6.3x7.5x9.4)
200kVA	160x190x240	22
	(6.3x7.5x9.4)

Three bypass current sharing inductors are assembled within each UPS cabinet without requirement of additional footprint. The resulting degree of unbalance is typically less than 20% of the rated sys- tem current depending on the external cable configuration. Cable lengths from the Bypass supply to each UPS module and from the UPS module output to the paralleling point should be kept as identi- cal as possible.

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