Table of Contents
Advertisement
REG 316*4 1MRB520049-Uen / Rev. F
F. Setting instructions
Settings: Current and voltage inputs
A three-phase group must be used for the current input.
The following can be set for the voltage input:
· single-phase input using U
· three-phase delta group
· three-phase star group.
Setting: Phi
The angle Phi determines the angle of the slip line and is moni-
tored to detect slip. The impedances Z
line.
Phi is also used to check power direction, i.e. the polarity of the
c.t's:
60°... 90°
240°...270°
Setting: Z
A
Z
is the impedance of the slip line and marks the limit of zone 2.
A
It is also used for measuring phase-angle (see 'WarnAngle' and
'TripAngle').
Z
should be set to the impedance between the location of the
A
protection and the off-load voltage of the equivalent circuit for the
entire power system.
Setting: Z
B
Z
is the impedance of the slip line in the reverse direction and
B
marks the limit of zone 1. It is also used for measuring phase-
angle (see 'WarnAngle' and 'TripAngle').
Z
should be set to the generator reactance X
B
rection (negative sign).
Setting: Z
C
Z
divides the slip line into two zones. Zone 1 lies between Z
C
and Z
and zone 2 between Z
C
Z
should be set to the impedance from the location of the pro-
C
tection up to the first busbar.
RS
A ,
c.t. neutral on the line side
i.e. connection according to Fig. 12.4
c.t. neutral on the generator side.
and Z
.
C
A
ABB Switzerland Ltd
Z
and Z
lie on this
B
C
' in the reverse di-
d
3-267
B
Advertisement
Chapters
Table of Contents
