User Manual Liebert Hipulse E Chapter 8 - Operating Instructions
Single or '1+N' UPS System Operator Control and Display Panel
(07/04) Page 8-5
Figure 8-3 EPO on UPS module
20 Emergency Stop — housed beneath a safety cover to prevent inadvertent operation
When the emergency stop switch is pressed it disables the static switch block entirely (so removing load
power). It also disables the rectifier and inverter, and trips the battery circuit breaker. Under normal
circumstances it does not remove UPS input power since this is applied through a manually controlled external
isolator; however, if the UPS input supply is connected via a circuit breaker having an electrical trip facility,
emergency power off can be used to drive the external circuit breaker's trip circuit.
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