ImpedanceAng
X
R
Z1
Fw
d
Z1
Re
v
IEC10000176-2-en.vsd
IEC10000176 V2 EN
Figure 68:
Mho, offset mho characteristic for Zone 1 with setting parameters Z1Fwd,
Z1Rev and ImpedanceAng
The three impedance zones can be time delayed individually by setting the parameter
tZx
(where
x
is 1-3 depending on selected zone). For instantaneous operation set the parameter
tZx
to 0.00 s for the particular zone. To enable the zone, the operation mode for the zone,
x
(where
x
is 1-3 depending on selected zone), has to be set to
Enable-Zone
.
The function are blocked in the following ways:
•
Activating of input BLOCK blocks the whole function.
•
Activating of the input BLKZ (fuse failure) blocks all output signals.
The activation of input signal BLKZ can be made by external or internal fuse failure
function.
Section 7
1MRK 502 048-UUS A
Impedance protection
164
Technical manual