5: Operating Instructions
38
TS_610_01 PowerWAVE 6000 S3 (60-120kVA) User Manual 21/10/19
5.4
How to transfer the load to the maintenance bypass
It may be necessary to transfer the load to the maintenance bypass supply to perform certain service or maintenance
operations – for example, when repairing a module in a standalone or capacity parallel module system.
This procedure is normally carried out by a trained service engineer and is not usually part of the day-to-day management
of the UPS system.
Initial conditions:
This procedure assumes one of the following initial conditions.
1. The UPS system is operating normally, ‘on inverter’
In which case continue with step 3 below:
2. The UPS system is operating with the load ‘on bypass’ due to either
• a system fault
• severe overload
• loss of redundancy
• or operating in ‘ECO’ mode
In which case continue with step 7 below:
Transfer the load to the UPS static bypass:
3. On the UPS control panel (on any module in a parallel-module system) press the
ENTER
key once to access the menu
system.
4. Using the
UP/DOWN
keys, move the cursor so that it is adjacent to
COMMANDS
and then press the
ENTER
key.
5. Using the
UP/DOWN
keys, move the cursor so that it is adjacent to
LOAD
TO
BYPASS
and then press the
ENTER
key.
a) The UPS system will transfer the load to static bypass (on all UPS modules in a parallel-module system).
6. On the module control panel(s), verify that:
a) The
INVERTER
LED has extinguished.
b) The
BYPASS
LED is green.
c) The LCD displays
LOAD NOT PROTECTED
.
CAUTION:
Before you carry out this procedure, warn the critical load user that the load will not be supplied with
processed, backed-up power once the transfer to maintenance bypass has been performed.
LINE 1
LINE 2
BY PASS
INVERTER
BATTERY
LOAD
LINE 1
LINE 2
BY PASS
INVERTER
BATTERY
LOAD
LINE 1
LINE 2
BY PASS
INVERTER
BATTERY
LOAD
