Bender NGRM700 - Initial Commissioning; Response Values

Initial commissioning
57
NGRM7xx_D00292_07_M_XXEN/02.2022
8. Initial commissioning
The following parameters must be entered for initial commissioning:
 System voltage U
sys
(phase-to-phase)
The corresponding coupling device must be used depending on the system voltage:
for U
sys
≤ 4.3 kV: CD1000, CD1000-2, CD5000 (20 k)
for U
sys
> 4.3 kV: CD14400, CD25000 (100 k)
 Ratio of the used potential transformers (U
NGR nom
) if used
 NGR rated current (I
NGR nom
)
 Ratio of the used measuring current transformer
(600:1 for W… measuring current transformers)
 NGR rated resistance R
NGR nom
8.1 Response values
The following parameters can be adjusted:
 Trip threshold for voltage (U
NGR
)
 Trip threshold for current (I
NGR
)
 Trip threshold for resistance (R
NGR
)
Voltage trip threshold (U
NGR
)
The threshold is set as a percentage of U
NGR nom
.
Setting range of trip threshold U
NGR
: 10…90 % (factory setting 60 %)
Current trip threshold (I
NGR
)
The trip threshold is set as a percentage of I
NGR nom
.
Setting range of trip threshold I
NGR
: 10…90 % (factory setting 60 %).
Parameters are set in the
Main menu > 6. HRG, LRG settings.
Alternatively, you can follow the setup wizard
(Main menu > 8. Commissioning).
Low trip threshold values may lead to false tripping, while
with high trip threshold values the device may not trip at all.