Bender NGRM750 Schnellstart-Handbuch - Seite 4
Blättern Sie online oder laden Sie pdf Schnellstart-Handbuch für Monitor Bender NGRM750 herunter. Bender NGRM750 8 Seiten. Neutral grounding resistor monitor (ngr)
Seite druckenNGRM700 (HRG), NGRM750 (LRG)
Measuring current transformer selection
Depending on the system to be monitored, a suitable measuring current transformer has to be chosen. All common
measuring current transformers (50 mA or 5 A on the secondary side) can be used. The following table helps you with
the choice:
System type
I
NGR
f
Transformation ratio of
Bender measuring current
transformer
Connecting cable
I
Δn
Type
CT: terminal k
CT: terminal l
4
NGRM7xx_D00292_07_Q_XXEN/11.2022
AC + DC
1...25 A
0...3800 Hz
Measuring range (see
CTUB103 manual)
5 A 100:1
10 A 200:1
25 A 500:1
max. 30 m
provided cable
or 0.75...1.5 mm²/AWG 18...16
CTUB103
CTUB103
CTAC...
24 V
S1(k) S2(l)
NGRM7...: 50 mA
NGRM7...: C
AC
5...25 A
42...3800 Hz
600:1
max. 40 m
CTAC..., WS...
k
l
WS...
k
l
NGRM7...: 50 mA
NGRM7...: C
AC
5...1000 A
50/60 Hz
max. 25 m (4 mm²/AWG 12)
max. 40 m (6 mm²/AWG 10)
CTB31...51
Every standard current
transformer can be used.
CTB
k
l
NGRM7...: 5 A
NGRM7...: C
AC
10...2000 A
50/60 Hz
NGRM7...: 5 A
NGRM7...: C