ABB Relion REQ650, Applications Manual

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12.8.3 Setting guidelines
The function does not have any parameters available in Local HMI or Protection and
Control IED Manager (PCM600).
GlobalBaseSel : Selects the global base value group used by the function to define
( IBase ), ( UBase ) and ( SBase ).
12.9 Station battery supervision SPVNZBAT
12.9.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Station battery supervision function SPVNZBAT U<> -
12.9.2 Application
Usually, the load on the DC system is a constant resistance load, for example, lamps,
LEDs, electronic instruments and electromagnetic contactors in a steady state
condition. A transient RL load exists when breakers are tripped or closed.
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.
•
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.
1MRK 505 291-UEN A
Section 12
Monitoring
277
Application manual