Reference Current And Connection Of Bcb - Liebert APM 150 User Manual

6.10 Reference Current And Connection Of BCB

Table 6-3 provides recommended BCB rated current and connection cable CSA.
Table 6-3 Reference table for selection of BCB rated current and connection cable CSA (recommended)
Max. battery discharge current (both
positive and negative) )at full load
30-cell
battery Reference rated current of BCB
Connection cable CSA
Max. battery discharge current (both
positive and negative) at full load
32-cell
battery Reference rated current of BCB
Connection cable CSA
Max. battery discharge current (both
positive and negative) at full load
34-cell
battery Reference rated current of BCB
Connection cable CSA
Max. battery discharge (both positive and
negative) current at full load
36-cell
battery Reference rated current of BCB
Connection cable CSA
Max. battery discharge (both positive and
negative) current at full load
38-cell
battery Reference rated current of BCB
Connection cable CSA
Max. battery discharge (both positive and
negative) current at full load
40-cell
battery Reference rated current of BCB
Connection cable CSA
1. If the external battery is configured to have separate wiring of positive terminal and negative terminal (that is, four wires
will be led out from the battery side), for the UPS, due to the limitation of the rated current, it is recommended to use a 4P
DC MCCB (DC rated voltage of the breaker meeting 1-pole 250Vdc, 2-pole 500Vdc, 3-pole 750Vdc, rated breaking
capacity limit being 35kA) or two 2P DC MCCBs (DC rated voltage of single breaker meeting 1-pole 250Vdc, 2-pole
500Vdc, rated breaking capacity limit being 35kA). Connections between the battery, BCB and UPS are shown in
Figure 6-3.
2. If the external battery is configured to use CT wiring (that is, three wires will be led out from the battery side), it is
recommended to use a 4P DC MCCB, with DC rated voltage of the breaker meeting 1-pole 250Vdc, 2-pole 500Vdc, 3-pole
750Vdc, and rated breaking capacity limit being 35kA. If the battery cell number ranges from 30 to 34, for cost-saving
purpose, refer to Figure 6-4 for the connections between the battery, BCB and UPS. If the battery cell number ranges from
36 to 40, refer to Figure 6-5 for the connections between the battery, BCB and UPS.
3. The max. battery neutral cable current can reach half of the current of the battery positive and negative cables. When
sizing the neutral cable, refer to this cable, and take the neutral cable currents as half of the currents listed in the table.
Liebert APM 150 Integrated UPS Single Module And Parallel System
Item
UPS rating (kVA)
Unit
30
A 105 210
A 150 250
mm 2 35
A 100 200
A 150 250
mm 35
2
A 94 186
A 100 200
mm 2 35
A 88 176
A 100 200
mm 2 25
A 84 168
A 100 200
mm 2 25
A 80 160
A 100 200
mm 2 16
Chapter 6 Battery
60 90
315
350
70 120
300
350
70 120
282
300
70 95
264
320
50 95
252
260
50 95
240
250
35 70
User Manual
53
120
420
450
150
400
450
150
376
400
120
352
400
120
336
350
120
320
320
95