ABB RET670 - Setting Parameters

IBase: Base current in primary A. This current is used as reference for current setting.
It can be suitable to set this parameter to the rated primary current of the protected
object where the current measurement is made.
tTrip: Time delay of the operation.
ContactSel: Operation of the contact based pole discrepancy protection. Can be set:
Disabled/PD signal from CB. If PD signal from CB is chosen the logic to detect pole
discrepancy is made in the vicinity to the breaker auxiliary contacts and only one signal
is connected to the pole discrepancy 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
discrepancy is realized within the function itself.
CurrentSel: Operation of the current based pole discrepancy protection. Can be set:
Disabled/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.
CurrUnsymPU: Unsymmetrical magnitude of lowest phase current compared to the
highest, set in % of the highest phase current. Natural difference between phase
currents in breaker-and-a-half installations must be considered. For circuit breakers in
breaker-and-a-half 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.
CurrRelPU: Current magnitude for release of the function in % of IBase.
3.7.9.3 Setting parameters
Table 108: CCRPLD (52PD) Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
IBase 1 - 99999 - 1 3000 Base current
tTrip 0.000 - 60.000 s 0.001 0.300 Time delay between trip condition and trip
signal
ContactSel Disabled
PD signal from CB
Pole pos aux cont.
- - Disabled Contact function selection
CurrentSel Disabled
CB oper monitor
Continuous monitor
- - Disabled Current function selection
CurrUnsymPU 0 - 100 % 1 80 Unsym magn of lowest phase current
compared to the highest.
CurrRelPU 0 - 100 %IB 1 10 Current magnitude for release of the function
in % of IBase
Section 3 1MRK504116-UUS C
IED application
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Application manual