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Technical data

NGRM7xx_D00292_07_M_XXEN/02.2022

Monitoring R

NGR

Measuring input R

...................................................................................................................................................< 33 V RMS

Measuring range NGR (with R

= 20 kΩ) active........................................................................................................0…10 kΩ

Measurement uncertainty for T = 0…+40 °C................................................................................................±20 Ω

Measurement uncertainty for T = –40…+70 °C........................................................................................... ±40 Ω

Measuring range NGR (with R

= 100 kΩ) active......................................................................................................0…10 kΩ

Measurement uncertainty for T = 0…+40 °C................................................................................................±30 Ω

Measurement uncertainty for T = –40…+70 °C........................................................................................... ±80 Ω

HRG

Setting range R

NGR nom

............................................................................................................................. 15 Ω…5 kΩ

Response value <R

NGR nom

.........................................................................................................10…90 % R

NGR nom

Response value >R

NGR nom

.....................................................................................................110…200 % R

NGR nom

LRG

Setting range R

NGR nom

............................................................................................................................. 0.1…200 Ω

Response value >R

NGR nom

..................................................................................................................... 200…500 Ω

Response delay, NGR-fault relay ..............................................................................................................................7 s (±2.5 s)

Response delay, trip relay..............................................................................................................................................0…48 h

Monitoring I

NGR

Measuring circuit 5 A

Nominal measuring current I

.............................................................................. DC / 50/60 Hz / 50…3200 Hz 5 A

Maximum continuous current ..............................................................................................................................2 x I

Overload capacity.................................................................................................................................10 x I

for 0.03 s

Measurement accuracy................................................................................................................................ ±2 % of I

Load..................................................................................................................................................................... 10 mΩ

Measuring circuit 50 mA

Nominal measuring current I

.........................................................................DC / 50/60 Hz / 50…3200 Hz 50 mA

Maximum continuous current ..............................................................................................................................2 x I

Overload capacity......................................................................................................................................10 x I

for 2 s

Measurement accuracy................................................................................................................................ ±2 % of I

Load.........................................................................................................................................................................68 Ω

Measuring circuits 5 A and 50 mA

Response value I

NGR

......................................................................................................................10…90 % I

NGR nom

Response delay, ground-fault relay.............................................................................................. ≤ 40 ms (±10 ms)

Response delay, trip relay (configurable)......................................................................................100 ms…48 h, ∞