MGE UPS Systems 250A - Manual (Page 32)

Page 32 - 34020201EN/AB
6. Appendices
6.5 Glossary
ALARM Major alarm signalling that the current in the output circuit considered is higher than 80%
of its rated value.
AUX ALARM INPUT Alarm indicating either:
◗ excessive temperature rise in the isolation transformer,
◗ actuation of the remote shutdown function.
DOWN Scroll button used to access previous measurement (metering mode) or setting (setup
mode).
Isolation transformer Optional transformer used to provide galvanic isolation between the distribution system
and the output circuits, to block reinjection of third-order harmonics upstream or to create
a neutral if the distribution system does not have one.
METER Function button for access to the next measurements (metering mode) or to return to
MONITORING mode (alarm or setup mode).
Output circuit Single-phase circuit (phase, neutral and earth) exiting the PMM module, protected by a
single standard circuit breaker (PMM module with 126 output circuits) or by a circuit
breaker with earth-leakage protection (PMM module with 60 output circuits).
OVER CURRENT Alarm indicating an overload on the PMM module.
OVER VOLTAGE Alarm indicating that the voltage of the distribution system is too high.
PMM Power Management Module (the device in question).
RS-232 Serial communication standard using a SUB-D 9-pin connector.
RS-485 Serial communication standard available via a screw-terminal block.
SELECT Function button used to obtain a fixed display if autoscroll (parameter rotation) is
activated, clear an alarm (alarm mode) or access the next parameter to be set (setup
mode).
UP Scroll button used to access next measurement (metering mode) or setting (setup
mode).
WARNING Minor alarm signalling that the current in the output circuit considered is between 60 and
80% of its rated value.