Bender NGRM700 Quick Start Manual
1
Quickstart
Neutral Grounding Resistor Monitor
Intended use
The NGRM700 is only intended for use in high-resistance earthed systems. In these systems, the NGRM700 monitors
the current through the NGR,
the voltage between the star point of the transformer and earth
(voltage drop across the NGR),
the condition of the neutral grounding resistor (NGR),
line-to-line and line-to-earth voltages.
This quick-start guide does not replace the operating manual of the device.
Download: www.bender.de/manuals
Safety instructions
Removing FP200-NGRM
Connection X1
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
An electric shock
Damage to the electrical installation
Destruction of the device
Before installing and connecting the device, make sure that the installation has
been de-energised. Observe the rules for working on electrical installations.
I1 Pulser IN
I2 Reset IN
I3 Test IN
A Modbus RTU (A)
B Modbus RTU (B)
Ground
M+ Analogue output
Q2 Open Collector: Pulser OUT
Q1 Open Collector: System health
+ Output for supply of external relays (+24 V, max. 100 mA)
DANGER
PH 1
X1 ETH
R
OFFON
1
2
X1
ETH
R
max. 5 m
Switch
RJ45:
Remote
RJ45:
Ethernet
I1
I2
I3
A
B
M+
Q2
Q1
+
NGRM700
NGRM700_D00292_02_Q_XXEN/06.2018
EN
2
NGRM700_D00292_02_Q_XXEN/06.2018
Dimension diagrams basic enclosure and FP200-NGRM
a
k
j
i
hgf
e
d
cb
l
3
55.50
61.40
63.35
150
125
230
245
205
223.50
211
a
k
j
i
h
g
f
e
d
c
b
l
0.12
2.19
2.42
2.49
5.91
4.92
9.06
9.65
8.07
8.80
8.31
mm in
6 0.236
Mounting position
top
a
f
e
d
c
b
a
f
e
d
c
b
mm in
135.5
65.5
35.6
144
72
5.8
5.33
2.58
1.40
5.67
2.38
0.23
5.43+0.02/-0
in
138+0.5/-0 mm
2.60+0.02/-0 in*
66+0.5/-0 mm*
max. 5.3 mm
* IP 65:
68+0.7/-0 mm
2.68+0.03/-0 in
max. 0.21 in
3
NGRM700_D00292_02_Q_XXEN/06.2018
Connection ≤ 690 V
Connection > 690 V
k
l
AC/DC
24...240 V
6 A6 A
A1
A2
L1 L2 L3
R
S
E
C
50mA
5A
NGR
NGRM700
CT
Rs (G1)
E (G)
N
CD...
31 32 3421 22 24
11 12 14
FP200-NGRM
X1
Dig. IN/OUT Ethernet
6 A6 A6 A
L1
L2
L3
NGR
fault
Ground
fault
Trip
Circuit breaker
The "N" connection of the
CD-series coupling device
should be as close to the
transformer star point as
possible.
k
l
AC/DC
24...240 V
6 A6 A
A1
A2
L1 L2 L3
R
S
E
C
50mA
5A
NGR
NGRM700
CT
Rs (G1)
E (G)
N
CD...
31 32 3421 22 24
11 12 14
FP200-NGRM
X1
Dig. IN/OUT Ethernet
PT *
L1
L2
L3
NGR
fault
Ground
fault
Trip
Circuit breaker
* The PT ratio can be
selected on the NGRM700
The "N" connection of the
CD-series coupling device
should be as close to the
transformer star point as
possible.
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