MGE UPS Systems Galaxy PW user manual System start-up, Start-up of a module

start-up

User’s Manual

system start-up

single-UPS unit or redundant parallel UPS

See figure 15.

Proceed in the following order:

■close the upstream switches supplying normal and bypass AC source power (on the LV switchboard);

■close normal AC input switch Q1. The system powers up:

❏ the rectifier/charger automatically starts, ❏ green light 1 on the control panel goes on,

❏ light 2 turns red;

■close bypass AC input switch Q4S:

❏green lights 3 and 5 on the control panel go on;

■ close inverter output switch Q5N; ■ close battery circuit breaker QF1;

❏light 2 goes off;

■open maintenance bypass switch Q3BP;

■press the "inverter on" button 7 on the control panel:

❏ the green "inverter" light 4 flashes,

❏ the inverter starts, then, if the bypass AC source transfer conditions are satisfied, the load is transferred to the inverter if the on-line mode is selected.

❏ the green "static-bypass" light 3 goes off,

❏ the green "inverter" light 4 shines for on-line mode.

parallel UPS unit for increased output

See figure 16.

Proceed in the following order:

■check that all load devices are off or that the load is disconnected;

■close the upstream switch supplying normal AC source power (on the LV switchboard);

■close the normal AC input circuit break- ers Q1 on the UPS units. The system powers up:

❏ the rectifier/chargers automatically start, ❏ the green "rectifier/charger" lights 1 in the control panels go on,

❏ lights 2 turn red;

■close the battery circuit breakers QF1; ❏ lights 2 go off;

❏ green lights 3 and 5 on the control panels go on;

■close output switches Q5N for the inverters and in the external bypass unit;

■open maintenance bypass switch Q3BP in the external bypass unit;

■press the "inverter on" button 7 on each control panel:

❏ the green "inverter" lights 4 flash;

■when a sufficient number of inverters are ready, the inverter-output contactors close:

❏ the green "inverter" lights 4 shine per- manently green;

❏ the "static-bypass" lights 3 go off.

start-up of a module

start-up of a rectifier/charger

■rectifier/charger start-up is automatic when the normal AC input circuit breaker

Q1 is closed:

❏the green "rectifier/charger" light 1 on the control panel goes on;

■ close battery circuit breaker QF1.

WARNING Rectifier/charger start-up is automatic when normal AC input circuit breaker Q1 is closed. DC voltage is present in the DC bus.

start-up of an inverter

When the rectifier/charger is on:

■press the "inverter ON" button 7 on the control panel;

❏ the green "inverter" light 4 flashes.

Single-UPS unit

■the inverter starts, then, if the bypass AC source transfer conditions are satis- fied, the load is transferred to the inverter if the on-line mode is selected. For on- line mode:

❏ the green "inverter" light 4 remains on, ❏ the "static-bypass" light 3 goes off.

Parallel UPS unit

	Q1	Q4S		Q3BP		Q5N			Q1	Q5N
1	1	0	1	0	1	0	1	1	1	0	1
	0								0
										QF1

2	1		1		1		1	2
	0	0		0		0
								Q1	0	I	Q5N

3	1		1		1		1	3	1	0	1
		0		0		0
	0								0
			QF1
4
	1		0	I
5			1		1		1
	0	0		0		0
6								4

■the inverter starts and awaits the start of the other inverters;

■when they are all on or enough have been started to supply the rated load power, the output switch for each running inverter closes and the load is supplied with power:

❏ the green "static-bypass" light 3 goes off,

❏ the green "inverter" light 4 on the con- trol panels of the running inverters goes on.

Fig. 15 Fig. 16

Start-up 13