1.Self-Supervision Of The Rtd Module - ABB REM 610 Technical Reference Manual

REM 610
4.1.16.1.
98
Motor Protection Relay
Technical Reference Manual
Table 4.1.16-1 IRF codes
Fault code
131, 139, 195, 203, 222, 223
253
1)
May be corrected by formatting to the factory setting.
2) All settings will be zero during the fault.
For further information on internal relay faults, refer to the Operators Manual.
Warnings
In case of a warning, the relay will continue to operate except for those protection
functions possibly affected by the fault, and the green target LED (ready) will
remain lit as during normal operation. Further, a fault target message, which
depending on the type of fault includes a fault code, will appear on the LCD. If more
than one type of fault occur at the same time, one single numeric code which
indicates all the faults will be displayed. The fault target message cannot be
manually cleared but will disappear with the fault.
When a fault appears, the fault target message is to be recorded and stated when
ordering service. The fault codes are listed in the following table:
Table 4.1.16-2 Warning codes
Fault
Battery low
1)
Trip-circuit supervision
Power supply module temperature high 4
Communication module faulty or missing 8
RTD module faulty
Temperature sensor range error
Sensor circuit open or shorted (RTD1)
Sensor circuit open or shorted (RTD2)
Sensor circuit open or shorted (RTD3)
Sensor circuit open or shorted (RTD4)
Sensor circuit open or shorted (RTD5)
Sensor circuit open or shorted (RTD6)
Thermistor circuit open or shorted
(Thermistor1)
Thermistor circuit open or shorted
(Thermistor2)
Σ
1) The external fault warning can be routed to SO2 with SGF 1/8.
For further information on warnings, refer to the Operator's Manual.
Self-supervision of the RTD module
Each input sample is validated before it is fed into the filter algorithm. The samples
are validated by measuring an internally set reference voltage immediately after the
inputs have been sampled. If the measured offset voltage deviates from the set value
by more than 1.5 per cent from the measuring range, the sample will be discarded.
Type of fault
Internal reference voltage error
Error in the measuring unit
Weight value
1
2
16
32
64
128
256
512
1024
2048
4096
8192
16383
1MRS 755537