ABB REG316 4 Series Operating Instructions Manual page 299

REG 316*4 1MRB520049-Uen / Rev. F
Trip1
defines the tripping channel activated by the tripping output
of stage 1 of the function (tripping logic).
ZA
Forwards impedance
also used for determining phase-angle.
ZB
Reverse impedance
is also used for determining phase-angle.
ZC
Impedance of the zone limit
tween ZB and ZC and the beginning of zone 2 between ZC
and ZA.
Phi
Angle of the slipping characteristic and of ZA, ZB and ZC. Phi
also determines the energy direction:
60°...90°
240°...270°
WarnAngle
Rotor angle above which alarm of potential slipping is given
(rotor angle > WarnAngle).
TripAngle
Rotor angle below which first 'Trip1' and the 'Trip2' are is-
sued (rotor angle < TripAngle).
1)
The impedance unit 1.000 UN/IN represents an impedance of 100%. Thus if the imped-
ance setting in percent is known, it can be set directly, e.g. the setting for 10% is 0.100.
An impedance of 1.000 UN/IN corresponds to a current of 1 I
neutral voltage U / 3 in all three phases. The respective positive-sequence impedance
N
is U / 3 / I :
N N
U I
N
N
100 V 1 A
100 V 2 A
100 V 5 A
200 V 1 A
200 V 2 A
200 V 5 A
. ZA marks the end of zone 2 and is
1)
1)
. ZB marks the beginning of zone 1 and
c.t. neutral on the line side
c.t. neutral on the generator side.
Impedance unit
57.735 W /ph
28.868 W/ ph
11.547 W /ph
115.470 W/ ph
57.735 W /ph
23.094 W /ph
ABB Switzerland Ltd
1)
. ZC is the end of zone 1 be-
at the rated phase-to-
N
3-261