Reference Manual
Capacitor Bank Protect. Relay KSR1
Rev. 10
2018-09
4
Important Information!
If this sign appears besides a text passage, the reader is strongly advised to read the corresponding
information, because it is very important for the device’s usage! It can indicate safety advices or
information for the correct handling of the device. If the information is disregarded, the device may
become inoperable or even damaged!
1 Overview
The KSR1 is designed to monitor medium and high voltage capacitor banks. The KSR1 can be set to monitor current or
voltage, selectable in the menu. The device can monitor two threshold levels for Alarm / Trip. All thresholds / readings
can be either a current or voltage value or a percentage setting of the maximum value. Once the Alarm or Trip level is
reached, the appropriate relay will operate after the programmed delay time has elapsed. Both relays can be
programmed to stay in the Alarm/Trip position until a reset is performed by the user. If it is required, alternatively they
can be set to reset automatically, if the fault is cleared. A further relay can be used to signalize that an Alarm/Trip or
both Alarm+Trip have been occurred. The KSR1 provides details of the last 5 Alarm and Trip operations.
The KSR1 uses absolute values. For this reason, shown values are always positive independent of their actual direction
(meas. value increases / decreases).
Simplified diagram
Measured value
– Natural unbalance
= Value
Comparator
Value > limit
Delay time
Alarm / Trip
Adjusted threshold
Alarm / Trip
Yes
Yes
No
No
Adjusted delay time
for Alarm / Trip
Monitoring blocked
via DI1 & DI2
Switch output relay
Yes
No
Relay 1 TRIP
Relay 3 progr.
Relay 2 ALARM
!
