ABB RER620, Technical Manual

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Section 6
1MAC309294-MB F
Condition monitoring functions
364 RER620
Technical Manual
The operation counter counts the number of operations based on the state change of the
binary auxiliary contacts inputs
POSCLOSE_A(_B,_C)
and
POSOPEN_A(_B,_C)
.
The number of operations
NO_OPR
is available through the Monitored data view on the
LHMI or through tools via communications. The old circuit breaker operation counter
value can be taken into use by writing the value to the parameter and in the clear menu
from WHMI or LHMI.
Alarm limit check
The operation alarm is generated when the number of operations exceeds the value set with
the threshold setting. However, if the number of operations increases further and exceeds
the limit value set with the setting, the output is activated.
The binary outputs and are deactivated when the
BLOCK
input is activated.
6.1.4.5 Accumulation of I
y
t
Accumulation of the I
y
t module calculates the accumulated energy.
The operation of the module can be described by using a module diagram. All the modules
in the diagram are explained in the next sections.
Figure 198: Functional module diagram for calculating accumulative energy and
alarm
Accumulated energy calculator
This module calculates the accumulated energy I
y
t. The factor y is set with the Current
exponent setting.
The calculation is initiated with the
POSCLOSE_A(_B,_C)
input open events. It ends
when the RMS current becomes lower than the Acc stop current setting value.
Accumulated
energy
calculator (A)
I_A
POSCLOSE_A
RST_IPOW
BLOCK
Alarm limit
check
IPOW_LO
IPOW_ALM
Accumulated
energy
calculator (B)
I_B
POSCLOSE_B
Accumulated
energy
calculator (C)
I_C
POSCLOSE_C