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Due to RMS continuous product improvement policy this information is subject to change without notice. 1B230/Issue F/15/08/07/2/5
BLOCK INSTANTANEOUS TRIPS OUTPUT
A Block Instantaneous Trips output (RLY Block Inst Pr) can be
arranged to block the trip function of non-discriminating
protection, such as low set instantaneous overcurrent or earth
fault protection, or distance protection operating with Zone 1
extension. This function is used to ensure that the final trip to
lock out for a persistent fault is made by discriminating protection
& can be set at the front panel to operate after the first trip, after
the second trip or to OFF (Function disabled).
The output relay is normally reset and to operates (contact
closes) to block non-discriminating protection.
This is suitable for most modern protective relays such as
Ohmega & Argus.
CIRCUIT BREAKER AUXILIARY CONTACT
An auxiliary contact on the circuit breaker (Closed when the CB is
tripped) is required to monitor the operation of the CB using the
INP CB Aux Switch.
LINE VOLTAGE INTERLOCK INPUT
Line status information is derived from input INP Line Volt Mon.
This feature inserts additional checks in the auto reclose initiation
and dead time start logic, such that an auto reclose cycle can only
be initiated if the line was live until immediately before the
protective relay operation, and the dead time cannot start until the
line has gone dead.
Front panel switch selection of Live Line IN or OUT.
CB RECLOSE SPRING STATUS INPUT
Application of a control voltage to the INP Spring Charge input
will defer the CB reclose output pulse (RLY CB Close Sig) until
the signal is removed. This function is used to ensure that the CB
will not receive a reclose pulse until after the reclose spring is
fully charged.
The spring charged signal is taken from an auxiliary switch
contact on the circuit breaker.
If the INP Spring Charge input defers the CB reclose output
pulse for 60s the 1B230 will go to lockout.
MAIN PROTECTION INTERFACE
Two input types are provided to interface with the main protection
to initiate the reclose cycle:
1. Shunt initiate Voltage input to INP Main Protn Shunt
Pulse Length >40 m Sec
2. Series initiate Current input to INP Main Protn Series
(optional) Current >1.2 Amp DC
Pulse Length >40 m Sec
Resistance <0.5 ohm
SAFE TO CLOSE INPUT
A control voltage to the INP Safe To Close input must be applied
before a CB close pulse can be output.
If the CB reclose output pulse is delayed for 60s by the INP Safe
to Close input is not being applied, the 1B230 will go to lockout.
DRIVE TO LOCKOUT INPUT
Application of a voltage pulse to the INP Drive To Lockout input
will drive the 1B230 to the lockout condition.
Function Details
RESET RELAY FROM LOCKOUT
The 1B230 may be reset from the lockout condition in 3 ways:
1. Application of a voltage pulse to the INP Reset Lockout input;
2. Pressing the front panel reset button;
3. Interruption of the auxiliary supply for >10s.
RECLOSE OPERATION
Front panel switch selection of Single (1) or double Shot (2)
Front panel switch selection of Lockout (L) or Auto Reset (A)
The contact closure output pulse (RLY CB Close Sig) is of 2
second duration.
TIME DELAY SETTING RANGES
Dead Time 1 (Reclose 1): 5 to 180s
Dead Time 2 (Reclose 1): 5 to 180s
Reclaim Time Delay: 5 to 60s
TIMING ACCURACY
Repeat ± 1% of setting
Setting ± 2% of max. setting
OPERATION INDICATORS
LED indication of relay healthy
LED indication of reclose in progress - Initiation to reset or lockout
LED indication of block non discriminating protection
LED indication of relay in lockout condition
OPTIONAL COUNTER (Cumulative)
7 Digit (non reset).
STATUS INPUT SUMMARY
Description Signal Comments
INP CB Aux Switch Steady state Apply volts
INP Main Protn Shunt Pulse Apply volts
INP Main Protn Series Pulse Apply current (Optional)
INP Safe To Close Steady state Apply volts
INP Spring Charge Steady state Apply volts
INP Drive To Lockout Pulse Apply volts
INP Reset Lockout Pulse Apply volts
INP Line Volt Mon Steady State Use Live Line In switch
RELAY OUTPUT SUMMARY
Description Signal Comments
RLY A/R In Prog Steady state 1 C/O follows LED
RLY CB Close Sig 1 2s pulse 1 C/O
RLY CB Close Sig 2 2s pulse 1 C/O
RLY Block Inst Pr Steady state 1 C/O
RLY A/R Lockout Steady state 1 C/O
RLY Fail alarm Steady state 1 C/O P/U when healthy
