APC 20 - 200 KVA user manual Parallel UPS for increased output, Isolate all UPSs

Maintenance (cont.)

Parallel UPS for increased output

See figure 29.

◗isolate all UPSs

Proceed in the following order (see figure 30):

◗shut down the inverters (press the "inverter OFF" buttons 9 for three seconds),

◗close switch Q3BP and open switches Q5N and Q4S in the parallel- connection unit,

◗open switches Q1, QF1 and Q5N on the UPS units.

◗start-up

Following servicing, proceed in the following order (see figure 31):

◗close switches Q5N on the UPS units,

◗close switch Q4S, then switch Q5N, in the parallel-connection unit,

◗open switch Q3BP in the parallel- connection unit,

◗close switches Q1 and QF1 on the UPS units,

◗start the inverters (press the "inverter ON" buttons 8 ).

Note:

We recommend that you call on the after-sales support department to carry out these operations.

Note that for parallel UPSs for increased output, the entire installation must be bypassed because it is not possible to isolate just one UPS unit.

					Q3BP
		1	Q1	Q5N	Q5N
				QF1
2	Q4S	2	Q4S
			Galaxy 1
		1
		2	Galaxy 2
		1
		2	Galaxy 3
		1
		2	Galaxy 4

Fig. 29

MGe™ Galaxy™ PW 20 to 200 kVA
1							or			2	3		4	5
								bypass 150, 360 kVA
								Q4S	0	1	0	1	0	1
								Q3BP	0	1	0	1	0	1
								Q5N	0	1	0	1	0	1
		Q1	Q4S			Q5N				2	3		4	5
5	0	1	0	1		0	1	bypass 600 kVA
				QF1				Q4S		1		1		1
6										0		0		0
								Q3BP		1		1		1
				0	I
										0		0		0
7	0	1	0	1		0	1	Q5N		1		1		1
										0		0		0

Fig. 30

MGE™ Galaxy™ PW 20 to 200 kVA

1	Q1	Q4S	Q5N	or			2	3		4	5
	1	0 1	0 1		bypass 150, 360 kVA
0
					Q4S	0	1	0	1	0	1
					Q3BP	0	1	0	1	0	1
					Q5N	0	1	0	1	0	1

		Q1	Q4S			Q5N			2	3	4	5
5	0	1	0	1		0	1
								bypass 600 kVA
				QF1
6								Q4S	1	1		1
				0	I					0		0
7								Q3BP	1	1		1
									0	0		0
								Q5N	1	1		1
									0			0

Fig. 31

36 - E-51028230XT/BG