Bender NGRM700, Manual, Page: 72 / 80

Technical data
72 NGRM700_D00292_04_M_XXEN/09.2019
Coupling
R
S
for
U
sys
≤ 4.3 kV .......................................................................................................... CD1000, CD1000-2, CD5000 (20 kΩ)
R
S
for
U
sys
> 4.3 kV ...................................................................................................................... CD14400, CD25000 (100 kΩ)
Monitoring
U
NGR
U
NGR
with
R
S
= 20 kΩ ............................................................ DC / 50/60 Hz / 50…3200 Hz; (400/√3) … ≤ (4300/√3) V
U
NGR
with
R
S
= 100 kΩ ..............................................................DC / 50/60 Hz / 50…3200 Hz; > (4.3 /√3) …(25/√3) kV
Measuring range.................................................................................................................................................. 1.2 x
U
NGR
nom
Overload capacity ...............................................................................................................................................2 x
U
NGR
for 10 s
Measurement accuracy ................................................................................ 2 % of
U
NGR nom
with
U
NGR nom
= (
U
sys (L-L)
/√3)
Voltage response value ............................................................................................................................ 0…100 %
U
NGR
nom
Response delay ground-fault relay...............................................................................................................≤ 40 ms (±10 ms)
Response delay trip relay (configurable)...................................................................................................... 100 ms…24 h, ∞
Tolerance
t
trip
when set to
RMS............................................................................................................................................................–20…0 ms
Fundamental ......................................................................................................................0…+150 ms (filter time)
Harmonics...........................................................................................................................0…+150 ms (filter time)
PT ratio primary ......................................................................................................................................................... 1…10,000
PT ratio secondary ..................................................................................................................................................... 1…10,000
DC immunity in case of active
R
NGR
measurement
with
R
S
= 20 kΩ ............................................................................................................................................ DC ±12 V
with
R
S
= 100 kΩ .......................................................................................................................................... DC ±60 V
Digital inputs
Galvanic separation .................................................................................................................................................................. no
Length connecting cables .......................................................................................................................................... max. 10 m
U
in
............................................................................................................................................................................. DC 0 V, 24 V
Overload capacity ....................................................................................................................................................... –5…32 V
Digital outputs
Galvanic separation .................................................................................................................................................................. no
Length connecting cables .......................................................................................................................................... max. 10 m
Currents (sink) for each output .............................................................................................................................. max. 300 mA
Voltage .................................................................................................................................................................................. 24 V
Overload capacity ....................................................................................................................................................... –5…32 V