Change Of State Of One Or More Output Relay Contacts; Relay Alarm Conditions - GE MiCOM P40 Agile Technical Manual

P44x/EN MR/Hb6
(MR) 7-8
1.2.3

Change of state of one or more output relay contacts.

If one or more of the output relay contacts has changed state since the last time that the
protection algorithm ran, then the new status is logged as an event. When this event is
selected to be viewed on the LCD, three applicable cells will become visible as shown below;
Contact Events
"OUTPUT CONTACTS"
"Event Value
010101010101010101010"
The Event Value is a 7, 14 or 21 bit word showing the status of the output contacts, where
the least significant bit (extreme right) corresponds to output contact 1 etc. The same
information is present if the event is extracted and viewed via PC.
1.2.4

Relay Alarm conditions.

Any alarm conditions generated by the relays will also be logged as individual events. The
following table shows examples of some of the alarm conditions and how they appear in the
event list:
Alarm Condition
Battery Fail
Field Voltage Fail
The previous table shows the abbreviated description that is given to the various alarm
conditions and also a corresponding value between 0 and 31. This value is appended to
each alarm event in a similar way as for the input and output events previously described. It
is used by the event extraction software, such as MiCOM S1 Agile, to identify the alarm and
is therefore invisible if the event is viewed on the LCD. Either ON or OFF is shown after the
description to signify whether the particular condition has become operated or has reset.
Alarm
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
Bit 15
Bit 16
Bit 17
Bit 18
Bit 19
Bit 20
Event Text
Battery Fail ON/OFF
Field Volt Fail ON/OFF
Event Text Explanation
Battery Fail Battery Fail
Field Volt Fail Field Voltage Fail
Prot'n Disabled Protection Disabled
F out of Range Frequency out of range
VT Fail Alarm VTS Alarm
CT Fail Alarm CTS Alarm
CB Fail Alarm CB Trip Fail Protection
I^ Maint Alarm Broken current Maintenance Alarm
I^ Lockout Alarm Broken current Lockout Alarm
CB Ops Maint No of CB Ops Maintenance Alarm
CB Ops Lockout No of CB Ops Lockout Alarm
CB Op Time Maint CB Op Time Maintenance Alarm
CB Op Time Lock CB Op Time Lockout Alarm
F.F. Pre Lockout Pre-alarm for lockout
F.F. Lock Excessive Fault Frequency Lockout Alarm
CB Status Alarm CB Status Alarm
Man CB Trip Fail CB Fail Trip Control
Man CB Cls Fail CB Fail Close Control
Man CB Unhealthy No Healthy Control Close
Control No C/S No C/S control close
A/R BAR Shot> A/R Lockout max shots
Measurements and Recording
MiCOM P442 & P444
Event Value
Bit position 0 in 32 bit field
Bit position 1 in 32 bit field