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Q3BP Optional maintenance bypass circuit breaker (in single-module UPS system); optional mainte-
nance bypass circuit breaker in MBC cabinet (in shared systems).
Q4S Control or bypass circuit breaker (in single-module UPS systems); user-supplied bypass AC
input circuit breaker supplying the SSC (in shared systems).
Q5N Optional UPS isolation circuit breaker (in single-module UPS systems); UPS module isolation
circuit breaker (in shared systems); optional SSC isolation circuit breaker (in MBC).
QF1 Battery disconnect circuit breaker.
Remote
emergency power off A switch used for shutting down electrical equipment from a location away from the equipment.
SCR Silicon controlled rectifier.
Security bypass (key) Pushbutton on the hidden panel (UPS modules and SSC) allowing forced transfers and other
commands to be issued. The security key pushbutton must be held down while the desired
function is executed.
Shipping damage Any damage done to an article while it is in transit.
SPDT Single Pole Double Throw.
SSC Static switch cabinet (in shared systems).
Static Transfer An solid state switching mechanism electronically controlled to pass AC power directly from the
utility to an output load.
Technician Refers to an electronic technician qualified to maintain and repair electronic equipment. Not
necessarily qualified to install electrical wiring.
Test connector DB-9 type connector on the LCD panel allowing MGE UPS SYSTEMS Customer Support
Service technician to access programmable and diagnostic features of the system.
UVoltage.
UF Under frequency.
UL Underwriters Laboratories, Inc.
UPS Uninterruptible power system.
UV Under voltage.
VACVolts of alternating current.
Vb Battery voltage (in volts DC).
VDC Volts of direct current.
Via By way of.
VPC Volts per cell, the measure of the electrical potential of a storage cell, such as a battery.
XFMR Transformer.
Glossary
EPS 7000 Single Module
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