ABB Relion 650 Series Applications Manual page 212

Section 12
Monitoring
The battery voltage has to be continuously monitored as the batteries can withstand moderate
overvoltage and undervoltage only for a short period of time.
• If the battery is subjected to a prolonged or frequent overvoltage, it leads to the ageing of the
battery, which may lead to the earlier failure of the battery. The other occurrences may be the
thermal runaway, generation of heat or increased amount of hydrogen gas and the depletion
of fluid in case of valve regulated batteries.
• If the value of the charging voltage drops below the minimum recommended float voltage of
the battery, the battery does not receive sufficient charging current to offset internal losses,
resulting in a gradual loss of capacity.
•
12.10 Insulation gas monitoring function SSIMG (63)
12.10.1 Identification
Function description
Insulation gas monitoring function
12.10.2 Application
Insulation gas monitoring function (SSIMG ,63) is used for monitoring the circuit breaker
condition. Proper arc extinction by the compressed gas in the circuit breaker is very important.
When the pressure becomes too low compared to the required value, the circuit breaker operation
gets blocked to minimize the risk of internal failure. Binary information based on the gas pressure
in the circuit breaker is used as input signals to the function. In addition to that, the function
generates alarms based on received information.
12.11 Insulation liquid monitoring function SSIML (71)
12.11.1 Identification
Function description
Insulation liquid monitoring function
12.11.2 Application
Insulation liquid monitoring function (SSIML ,71) is used for monitoring the circuit breaker
condition. Proper arc extinction by the compressed oil in the circuit breaker is very important.
206
If a lead acid battery is subjected to a continuous undervoltage, heavy sulfation occurs
on the plates, which leads to the loss of the battery capacity.
© Copyright 2013 ABB. All rights reserved
IEC 61850 IEC 60617
identification identification
SSIMG -
IEC 61850 IEC 60617
identification identification
SSIML -
1MRK 505 287-UUS B
GUID-358AD8F8-AE06-4AEA-9969-46E5299D5B4B v3
GUID-AD96C26E-C3E5-4B21-9ED6-12E540954AC3 v3
ANSI/IEEE C37.2
device number
63
GUID-A840E38C-CC42-4995-A569-A6092DDB81B2 v5
GUID-37669E94-4830-4C96-8A67-09600F847F23 v3
GUID-4CE96EF6-42C6-4F2E-A190-D288ABF766F6 v2
ANSI/IEEE C37.2
device number
71
GUID-140AA10C-4E93-4C23-AD57-895FADB0DB29 v5
Busbar protection REB650
Application manual