Users manual – MGE UPS Systems EPS 7000 User Manual
Page 45
Operation
page 2 —17
Users Manual
2.10
Shutdown
Shutdown procedures in this section apply to the EPS 7000 system under normal, emergency, overload, and mainte-
nance conditions.
2.10.1 Emergency Shutdown Using EPO
CAUTION:
Pressing the EPO disconnects the attached load. The
emergency power off (EPO) is to be used during emergency
situations only, where a hazard to personnel or equipment
exists, such as during a fire. DO NOT USE THE EPO TO
TURN THE UPS OFF; follow the procedures listed in
this section for turning the inverter on and off.
During an emergency situation, such as a fire in the computer or electrical room, the UPS and all downstream
devices can be instantly shut down by pressing the “emergency power off” (EPO) pushbutton on the front panel of
the UPS cabinet, or by pressing the “remote emergency power off” (REPO) optional pushbutton located within the
room.
The EPO or REPO pushbuttons should not be used for normal shutdown of the equipment; when activated, ground
paths may be broken (depending on installation) and sensitive loads attached to the UPS may lose safety ground
connection.
Each UPS module has an EPO feature that can be activated to shut down that module only, see section 1.5 Front
Panel.
2.10.2 Normal Shutdown
To shut down the UPS, press the “inverter off” pushbutton on the module front panel for 3 seconds. To restart, press
the “inverter on” pushbutton. Note that the transfer will occur only if the inverter is synchronized to the bypass;
otherwise, a forced transfer is needed, see section 2.11 Forced Transfers.
To isolate the SSC for maintenance, or to transfer the load to maintenance bypass input source (if present),
follow the procedure that applies to your configuration.
IMPORTANT:
When one UPS module in a shared system is shutdown, it
may cause the remaining modules to enter an overload or
current-limiting condition, if they are unable to fully support
the attached load. The remaining modules may shutdown
after a certain time or immediately (depending on the load
level), and the load may be transferred to the bypass AC
input source.