INA_DAYS to certain value with
Ini inactive days
setting. The inactive days INA_DAYS
will reset to zero when there is change in auxiliary contact.
When the INA_DAYS exceeds the limit value defined with the
Inactive Alm days
setting, the MON_AL alarm is activated. The time during the day when alarm is
forwarded can be set with the
Inactive Alm hours
parameter. The warning signal
MON_ALM can be blocked by activating the binary input BLOCK.
7.2.4.3 Operation counter
This module calculates the number of operation cycles which means the
combination of opening and closing operation of switch. The operation counter
is increased on each opening operation of the switch.
The number of operations NO_OPR is available in the monitored data view. The
former operation counter value can be taken into use by writing the value to the
Counter initial Val
parameter setting and can be cleared by setting the parameter
Operation counter
in the clear menu from WHMI or LHMI.
The OPR_ALM operation warning is generated when the number of operations
exceeds the value set with the
Alarm Op number
threshold setting. However, if the
number of operations increases further and exceeds the limit value set with the
Lockout Op number setting, the OPR_LO output is activated.
The binary outputs OPR_ALM and OPR_LO are deactivated when the BLOCK input is
activated.
7.2.4.4 Contact travel time
This module calculates the contact travel time for the closing and opening
operation. the travel time can be calculated in two different ways based on setting
Travel time Clc
mode.
When setting
Travel time Clc
mode is “From Pos to Pos”, the contact travel time of
the earthing switch or disconnector is calculated from the time between auxiliary
contacts’ state change. The opening travel time is measured between the opening
of the POSCLOSE auxiliary contact and the closing of the POSOPEN auxiliary
contact. The closing travel time is measured between the opening of the POSOPEN
auxiliary contact and the closing of the POSCLOSE auxiliary contact.
Condition monitoring functions
1MRS759142 F
1378 REX640
Technical Manual
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