User manual
Strona 28 z 36
IU_M710P_MANUAL_05i00_ENG
3.11.6.
UPS – Uninterruptible Power Supply
The UPS system will maintain the full functionality of the device for 60 seconds after power failure or 200
seconds when the display backlight is turned off. The most common use of these system is in devices which
are away from the position of dispatcher, in tight spaces or in hazardous areas. The system is used very often
in facilities that do not have a guaranteed supply. It immunizes the device from short power outages which
allows to keep continuity of information about the state of the power facility. In case of a power failure, the
device, for the guaranteed time, can perform switching operations and send complete information about the
state of the bay to the SCADA system, which significantly speeds up the analysis of the situation. The system
reaches full capacity after 10 minutes of charging.
3.11.7.
RPS – Redundant Power Supply
RPS solution consists of two independent power supplies. The default power supply for the controller is
power supply No. 1. Make-before-break switching to the power supply No. 2 follows after detection of too
low supply voltage by the power supply No. 1. Information about switching to the power supply No. 2 is
logged in the Event Log. The redundant power supply is essential for important facilities where reliable
operation is paramount.
3.12.
Diagnostic
3.12.1.
SC - Self-check
Subject to self-check are: voltages (supply, reference, battery), memory (program and data), correctness of
internal module-to-module communication, calibration factors of measurement channels and device set
points. Following detection of damage that could pose threat to safe operation of the switchgear, device
operation is stopped, AL relay contacts are opened, optical signalization on the front panel is activated. Such
a state requires servicing.