ABB Relion REQ650, Applications Manual

Page: 148 / 340

6.12.3 Setting guidelines
The parameters for the Pole discordance protection CCRPLD are set via the local HMI
or PCM600.
The following settings can be done for the pole discordance protection.
GlobalBaseSel : Selects the global base value group used by the function to define
( IBase ), ( UBase ) and ( SBase ).
Operation : Off or On
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.
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.
CurrRelLevel : Current magnitude for release of the function in % of IBase .
6.13 Broken conductor check BRCPTOC
6.13.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Broken conductor check BRCPTOC - 46
6.13.2 Application
Conventional protection functions can not detect the broken conductor condition.
Broken conductor check (BRCPTOC) function, consisting of continuous current
unsymmetrical check on the line where the IED connected will give alarm or trip at
detecting broken conductors.
Section 6
1MRK 505 291-UEN A
Current protection
142
Application manual