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tTrip
: Time delay of the operation.
ContSel
: Operation of the contact based pole discordance protection. Can be set:
Off
/
PD signal from CB
. If
PD signal from CB
is chosen the logic to detect pole
discordance is made in the vicinity to the breaker auxiliary contacts and only one
signal is connected to the pole discordance function. If the
Pole pos aux cont.
alternative is chosen each open close signal is connected to the IED and the logic to
detect pole discordance is realized within the function itself.
CurrSel
: Operation of the current based pole discordance protection. Can be set:
Off
/
CB oper monitor
/
Continuous monitor
. In the alternative
CB oper monitor
the
function is activated only directly in connection to breaker open or close command
(during 200 ms). In the alternative
Continuous monitor
function is continuously
activated.
CurrUnsymLevel
: Unsymmetrical magnitude of lowest phase current compared to
the highest, set in % of the highest phase current. Natural difference between phase
currents in 1 1/2 breaker installations must be considered. For circuit breakers in 1
1/2 breaker configured switch yards there might be natural unbalance currents
through the breaker. This is due to the existence of low impedance current paths in
the switch yard. This phenomenon must be considered in the setting of the
parameter.
CurrRelLevel
: Current magnitude for release of the function in % of
IBase
.
1MRK 505 388-UEN B
Section 7
Current protection
Busbar protection REB650 2.2 IEC
129
Application manual
Содержание REB650
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