IG-150-EN version 04; 03/10/16
106
Protection functions. Description and settings General instructions
ekor.rps
4.25. Coil monitoring example
4.25.1. General description
Trip sealing: If it is set to "YES" when a tripping signal is sent,
this signal remains until it sees the circuit breaker opening,
even if the current has disappeared. If it is set to "NO" the
tripping signal disappears when the current falls below
the starting current (although it will be guarantied that the
relay remains excited for at least the time programmed in
the digital output programming).
The open and close failure timings provide the time margin
existing between the corresponding command and the signal
reception of the circuit breaker operation, to considerate that
this has operated correctly. If this is not the case an "event"
and a control signal will occur, and a relay will be activated
(if there is any programmed with that function) for the open
failure and another for the close failure.
4.25.2. Setting range (6 tables)
Setting Min Max Step Notes
Trip sealing
YES/NO
Opening failure timing [s]
0.1 5.0 0.01
Closing failure timing [s]
0.1 5.0 0.01
Table 4.38. Setting range
4.26. Breaker failure protection
4.26.1. General description
Output relays can be programmed as:
1. Breaker close failure. It looks after the input "52 status".
2. Breaker open failure. It looks after the input "52 status".
3. Open failure with overcurrent. It works according to a
settings group generically known as "breaker failure":
a. Enable
b. Phase restore current
c. Neutral restore current
d. Definite time
If the function is enabled, it works as follows: If the unit
gives a tripping signal or an external protection signal is
received through a digital input, a timer will be started; if
after the time programmed as "denite time" the current
in any phase is higher than the programmed as "phase
restore" or the neutral is higher than the "neutral restore",
the relay programmed as "open failure with overcurrent"
will be activated. The relay will be deactivated only when
phase and neutral currents fall under their restore values.
If a LED has been programmed as "breaker failure (open
failure with overcurrent)", it will be activated in the
same way as the relay, but it will be deactivated only by
acknowledgment through keyboard/display on "last fault",
as the LED which signalizes trips.
The external protection signal is internally memorized, this
means it can be an impulsive type.
On this way of functioning, it will not be looked at the
digital input of the circuit breaker status, but at the values
of the currents.
Those units, with single-phase breaker failure, give
individual signals for each pole. The reposition settings are
the same as those of the three-phase one. These functions
can be activated by digital inputs of external protection of
each pole.
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