Siemens Siprotec 7UM611 User Manual

2.28 Measurement Supervision
173
7UM61 Manual
C53000-G1176-C127-3
Malfunction Responses of the Monitoring Functions
Depending on the type of malfunction detected, an indication is sent, a restart of the
processor system initiated, or the device is taken out of service. After three unsuccess-
ful restart attempts, the device is also taken out of service. The operational readiness
NC contact operates to indicate the device is malfunctioning. Also, the red LED
"ERROR" lights up on the front cover, if the internal auxiliary voltage is present, and
the green "RUN" LED goes out. If the internal auxiliary voltage fails, then all LEDs are
dark. The following table summarises the monitoring functions and the malfunction re-
sponses of the device.
Table 2-7 Summary of Malfunction Responses of the Device
1)
After three unsuccessful restarts, the device is taken out of service.
2)
DOK = "Device Okay" = Operational readiness relay drops off, protection and control func-
tions are blocked. Operator communication is still possible
Monitoring possible causes Malfunction Re-
sponse
Indication (No.) Output
Auxiliary Supply Voltage
Loss
external (aux. voltage) in-
ternal (converter)
Device shutdown all LEDs dark DOK
2)
drops out
Internal Supply Voltag-
es
internal (converter) or refer-
ence voltage
Device not in operation LED ”ERROR"
“Error A/D-conv.”
(FNo. 181)
DOK
2)
drops out
Battery Internal (battery) Indication “Fail Battery”
(FNo. 177)
Hardware Watchdog internal (processor failure) Device not in operation
1)
LED ”ERROR" DOK
2)
drops out
Software Watchdog internal (processor failure) Restart attempt
1)
LED ”ERROR" DOK
2)
drops out
Working Memory ROM internal (hardware) Aborted restart, Device
not in operation
LED flashes DOK
2)
drops out
Program Memory RAM internal (hardware) during startup LED flashes DOK
2)
drops out
during operation:
Restart attempt
1)
LED ”ERROR"
Settings memory internal (hardware) Restart attempt
1)
LED ”ERROR" DOK
2)
drops out
Sampling frequency internal (hardware) Device not in operation LED ”ERROR" DOK
2)
drops out
1 A/5 A changeover Jumper for 1 A/5 A miscon-
nected
Device not in operation
indication
LED ”ERROR"
“Error1A/5Awrong”
(FNo. 192)
DOK drops out
2)
Current Sum internal (measured value
acquisition)
Indication “Failure Σ I”
(FNo. 162)
as allocated
Current Symmetry External (power system or
current transformer)
Indication “Fail I balance”
(FNo. 163)
as allocated
Voltage sum internal (measured value
acquisition)
Indication “Fail Σ U Ph-E”
(FNo. 165)
as allocated
Voltage symmetry external (power system or
voltage transformer)
Indication “Fail U balance”
(FNo. 167)
as allocated
Voltage phase se-
quence
external (power system or
connection)
Indication “Fail Ph. Seq. U”
(FNo. 176)
as allocated
Current phase se-
quence
external (power system or
connection)
Indication “Fail Ph. Seq. I”
(FNo. 175)
as allocated
"Fuse Failure Monitor" external (voltage transform-
ers)
Indication “VT Fuse Failure”
(FNo. 6575)
as allocated
Trip Circuit Monitoring external (trip circuit or
control voltage)
Indication “FAIL: Trip cir.”
(FNo. 6865)
as allocated
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Siemens Siprotec 7UM611 Specifications

General

Brand	Siemens
Model	Siprotec 7UM611
Category	Relays
Language	English