Functions
286
7UM62 Manual
C53000-G1176-C149-3
2.45
Auxiliary Functions
The auxiliary functions of the 7UM62 relay include:
•
processing of messages,
•
processing of operational measured values,
•
storage of fault record data.
•
Commissioning aids.
2.45.1 Processing of Messages
After the occurrence of a system fault, data regarding the response of the protective
relay and the measured quantities should be saved for future analysis. For this reason
message processing is done in three ways:
LEDs and
Binary Outputs
(Output Relays)
Important events and conditions are displayed, using LEDs on the front panel of the
relay. The relay also contains output relays for remote signaling. All LEDs and binary
outputs indicating specific messages can be freely configured. The relay is usually
delivered with a default setting. The SIPROTEC
®
4 System Manual describes in detail
how to proceed for the configuration. The default settings on delivery are listed in the
Appendix of this manual, Section .
The output relays and the LEDs can be operated in a latched or unlatched mode
(individually settable for each one).
The latched conditions are protected against loss of the auxiliary voltage. Please
observe the following:
−
If necessary, clear stored indications by pressing the ”LED-Reset” key.
−
Remotely using a binary input,
−
Using one of the serial interfaces,
−
Automatically at the beginning of a new pickup.
Condition messages should not be stored. Also, they cannot be reset until the criterion
to be reported is cleared. This applies to messages from monitoring functions, or
similar.
A green LED displays operational readiness of the relay, and cannot be reset. It goes
out if the self-check feature of the microprocessor recognizes an abnormal
occurrence, or if the auxiliary voltage is lost.
When auxiliary voltage is present, but the relay has an internal malfunction, then the
red LED (ERROR) lights up and the processor blocks the relay.
Fault Information
Display or Personal
Computer
Events and conditions can be read out on the display on the front cover of the relay.
Using the front operator interface or the rear service interface, for instance, a personal
computer can be connected, to which the information can be sent.
In the idle condition, as long as no system fault is present, the display field can display
selected operating information (overview of operating measurement values). In the
case of a system fault, information about the system fault appears instead
(spontaneous display messages, see also Section 2.44.1.1). After the fault related
