Identification; Functionality; Function Block; Signals - ABB REC650 Technical Manual

1MRK 511 287-UEN A
6.9.1
6.9.2
6.9.3
6.9.4
Technical manual

Identification

Function description
Pole discordance protection

Functionality

Circuit breakers and disconnectors can end up with the phases in different positions
(close-open), due to electrical or mechanical failures. An open phase can cause
negative and zero sequence currents which cause thermal stress on rotating machines
and can cause unwanted operation of zero sequence or negative sequence current
functions.
Normally the own breaker is tripped to correct such a situation. If the situation persists
the surrounding breakers should be tripped to clear the unsymmetrical load situation.
The pole discordance function operates based on information from the circuit breaker
logic with additional criteria from phase selective current unsymmetry.

Function block

CCRPLD
I3P* TRIP
BLOCK START
CLOSECMD
OPENCMD
EXTPDIND
IEC08000041 V1 EN
Figure 59: CCRPLD function block

Signals

Table 79: CCRPLD Input signals
Name Type
I3P GROUP
SIGNAL
BLOCK BOOLEAN
CLOSECMD BOOLEAN
OPENCMD BOOLEAN
EXTPDIND BOOLEAN
IEC 61850 IEC 60617
identification identification
CCRPLD
SYMBOL-S V1 EN
Default Description
- Three phase group signal for current inputs
0 Block of function
0 Close order to CB
0 Open order to CB
0 Pole discordance signal from CB logic
Section 6
Current protection
ANSI/IEEE C37.2
device number
52PD
PD
137