Bender NGRM700 - Measuring Range; Measurement Accuracy; Overload Capacity

Technical data
72
NGRM7xx_D00292_07_M_XXEN/02.2022
Tolerance t
trip
when set to
RMS............................................................................................................................................................–20…0 ms
Fundamental ......................................................................................................................0…+150 ms (filter time)
Harmonics...........................................................................................................................0…+150 ms (filter time)
Measuring current transformer ratio primary ..........................................................................................................1…10,000
Measuring current transformer ratio secondary....................................................................................................... 1…10,000
Measuring range........................................................................................................................................................ 2 x I
NGR nom
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 ..............................................................................................................................10…90 % U
NGR nom
Response delay, ground-fault relay..............................................................................................................≤ 40 ms (±10 ms)
Response delay, trip relay (configurable).....................................................................................................100 ms…48 h, ∞
Tolerance t
trip
when set to
RMS............................................................................................................................................................–20…0 ms
Fundamental ......................................................................................................................0…+150 ms (filter time)
Harmonics...........................................................................................................................0…+150 ms (filter time)
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