GE Industrial Solutions LP11 924 Series 6 & 10 kVA - Manual (Page 33)

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OPM_LPU_11U_6K0_10K_1US_V010.Doc 32 User manual LP11 924 6 & 10 kVA UPS 1.0
5.3 - SHUTDOWN
Once the unit is in operation, there is no need to switch the unit on/off during use.
If the manual bypass switch (10 in Fig.19) is in position '1', switching off by the on/off switch (7 in Fig.19) results in a total
absence of the output voltage (also the bypass voltage) of at least 5 secs.
If you want to shut down a unit that is part of a parallel system, please refer to section 4.5.6.3.
If you want to shut down a standalone UPS: first determine whether
- the load may be switched off (section 5.3.1) or
- the load may not be switched off (section 5.3.3).
NOTE
Refer maintenance to qualified and skilled personnel only.
Refer to section 1.3 for further details
5.3.1 - SHUTDOWN OF THE UNIT WHEN LOAD SWITCHING OFF IS ALLOWED
1. Make sure that the load has been switched off.
2. Turn the switch ‘UPS on/off’ and circuit breakers ‘utility on/off’ and ‘bypass on/off’ into position ‘off’, in any sequence.
5.3.2 - RESTART
1. Follow section 5.2 ‘Start-up’ step 1-6.
5.3.3 - SHUTDOWN OF THE UNIT WHEN LOAD SWITCHING OFF IS NOT ALLOWED
This situation requires operation of the manual bypass switch.
See sections 3.5 and 5.1 for general information on the manual bypass switch (10 in fig. 19).
1. Make sure that:
- the circuit breaker ‘bypass on/off’ (9 in Fig.19) is in position 'on'
- the LCD screen shows the default screen
- the LCD screen does not show any alarm concerning bypass availability.
2. Turn the manual bypass switch into (service) position ‘2’.
The LCD screen should show: ‘ON MANUAL BYPASS’
3. Turn the switch ‘UPS on/off’ and circuit breakers ‘utility on/off’ and ‘bypass on/off’ into position ‘off’, in any sequence.
The power supplied to the load will not be affected.
5.3.4 - RESTART
1. Follow 5.2 ‘Start-up’ step 1-6.
5.3.5 - EMERGENCY SHUTDOWN SWITCH
If an emergency shutdown switch has been installed (see section 4.5.1.1-2, step 6) the UPS will stop immediately when
the switch is opened. Restart is only possible after closing the switch and turning the UPS off and on again with the UPS
on/off switch (7 in Fig.19).