Manual 37138C
ESDR 4T - Current Differential Protection Relay
Vector group
000
Transformer vector group
The transformer vector group can be set in this screen. Vector group Dd0 should be
set when the device is being used purely as generator differential protection.
The following applies:
HV = high-voltage side
LV = low-voltage side.
Vector group
Yd5
HV: -circuit arrangement, LV:
∆
-circuit arrangement, 5 × 30 ° = 150 °
Yy0
HV: -circuit arrangement, LV: -circuit arrangement, 0 °
Dy5
HV:
∆
-circuit arrangement, LV: -circuit arrangement, 5 × 30 ° = 150 °
Dd0
HV:
∆
-circuit arrangement, LV:
∆
-circuit arrangement, 0 °
Yz5
HV: -circuit arrangement, LV: Z-circuit arrangement, 5 × 30 ° = 150 °
Dz0
HV:
∆
-circuit arrangement, LV: Z-circuit arrangement, 0 °
Yd11
HV: -circuit arrangement, LV:
∆
-circuit arrangement, 11 × 30 ° = 330 °
Yy6
HV: -circuit arrangement, LV: -circuit arrangement, 6 × 30 ° = 180 °
Dy11
HV:
∆
-circuit arrangement, LV: -circuit arrangement, 11 × 30 ° = 330 °
Dd6
HV:
∆
-circuit arrangement, LV:
∆
-circuit arrangement, 6 × 30 ° = 180 °
Yz11
HV: -circuit arrangement, LV: Z-circuit arrangement, 11 × 30 ° = 330 °
Dz6
HV:
∆
-circuit arrangement, LV: Z-circuit arrangement, 6 × 30 ° = 180 °
Differential Protection
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Differential
protection ON
Differential protection
ON/OFF
ON
................Monitoring of the differential current is enabled and the following
screens of this option are displayed.
OFF
..............The monitoring is disabled and the following screens are not dis-
played.
NOTE
The following screens are only visible if the differential protection is enabled. These screens do not
appear if the monitoring is set to OFF.
Page 30/46
© Woodward
