Galaxy PWTM 100 to 225 kVA
operation in on-line mode
normal operation
Normal AC source power is available (see figure 5).
■lights 1 , 4 and 5 shine green on the control panel;
■the power necessary for the load is pro- vided by the normal AC source (1) through the rectifier/charger (A) and the inverter
(B);
■the rectifier/charger (A) also supplies the power to float charge and recharge the battery if any.
The rectifier/charger output voltage (DC) is regulated to supply:
❏ the
❏ a single charge voltage for sealed lead- acid batteries.
The voltages depend on the number of battery cells and the battery manufacturer. Factory set, they may also be adjusted by
An electronic board continuously mea- sures the battery temperature and auto- matically adjusts the voltages.
Note:
In parallel Galaxy PW™ systems, the power drawn by the load is equally shared between the different units.
1 | 4 | 5 |
1 |
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2 |
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A | B |
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1 |
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| D |
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| C |
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2 |
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Fig. 5
operation with the normal AC source down
See figure 6.
In the event of a normal AC source failure or voltage outside specified tolerances of ±10% in amplitude (±15% optionally), the rectifier/charger (A) stops and the battery
(D)supplies the necessary backup power to the load via the inverter (B). The bat- tery,
Lights 2 , 4 and 5 shine green.
The user is warned of battery operation by the slow beeping of the buzzer 6 (see figure 16) and the message "LOAD PRO- TECTED, BATTERY DISCHARGING", fol- lowed by the remaining backup time and the percent load.
This information is also available via volt- free changeover contacts for remote con- trol devices.
2 | 4 | 5 |
1 |
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2 |
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A | B |
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1 |
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| D |
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| C |
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2 |
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Fig. 6
battery time
The available battery time during a normal AC source outage depends on the:
■rated capacity of the battery;
■power consumed by the load;
■temperature of the battery;
■age of the battery.
The specified battery time corresponds to a minimum duration at full rated load. The actual backup time can therefore be greater if the system operates below its full rated load during the normal AC source outage. Operation on battery power can be extended beyond the speci- fied time by reducing the load power con- sumption (by disconnecting
A "low battery" warning signal is sent via
2shines red (not flashing). The mes- sage "LOAD NOT PROTECTED, ON- LINE MODE" is displayed and the buzzer sounds continuously.
If the bypass AC source also fails, the load is no longer supplied. The inverter automatically shuts down when the time on battery power exceeds three times the specified backup time.
NOTE
The "low battery shut- down" warning signal can be sent with an adjustable time delay prior to the effective end of battery power.
6 | Introduction |