Setting Of Timers For Distance Protection Zones - ABB REL670 2.2 IEC Applications Manual

Section 8
Impedance protection
8.5.3.10
8.6
8.6.1
8.6.2
8.6.3
282
The minimum operating fault current is automatically reduced to 75% of its set
value, if the distance protection zone has been set for the operation in reverse
direction.

Setting of timers for distance protection zones

The required time delays for different distance-protection zones are independent of
each other. Distance protection zone1 can also have a time delay, if so required for
selectivity reasons. One can set the time delays for all zones (basic and optional) in
a range of 0 to 60 seconds. The tripping function of each particular zone can be
inhibited by setting the corresponding Operation parameter to Off. Different time
delays are possible for the ph-E (tPE) measuring loops in each distance protection
zone separately, to further increase the total flexibility of a distance protection.
Additional distance protection directional function
for earth faults ZDARDIR
Identification
Function description
Additional distance protection
directional function for earth faults
Application
The phase-to-earth impedance elements can be supervised by a phase unselective
directional function based on symmetrical components (option).
Setting guidelines
AngleRCA and AngleOp: these settings define the operation characteristic. Setting
AngleRCA is used to turn the directional characteristic, if the expected fault current
angle does not coincide with the polarizing quantity to produce the maximum
torque. The angle is positive, if operating quantity lags the polarizing quantity and
negative if it leads the polarizing quantity. The setting AngleOp (max. 180 degrees)
defines the wideness of the operating sector. The sector is mirror-symmetric along
the MTA (Maximum Torque Axis).
Directional elements for earth-faults must operate at fault current values below the
magnitude of load currents. As phase quantities are adversely affected by load, the
IEC 61850 IEC 60617
identification identification
ZDARDIR
S00346 V1 EN-US
Line distance protection REL670 2.2 IEC
1MRK 506 369-UEN B
SEMOD154704-138 v1
SEMOD175630-1 v3
GUID-39299546-12A2-4D9D-86D0-A33F423944E4 v2
ANSI/IEEE C37.2
device number
-
SEMOD154885-5 v9
SEMOD154897-5 v6
Application manual