isoHR685W-x-I-B_D00261_05_M_XXEN/12.2021
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Coupling devices
12. Coupling devices
Coupling devices extend the nominal system voltage range of an ISOMETER®.
Depending on the configuration, systems up to a nominal system voltage of 12 kV can be
monitored.
12.1 Connection using the AGH150W-4(DC)
Danger
Risk of electric shock!
The coupling device is operated with high voltage, which can be life-thre-
atening in case of direct contact. Make sure that only electrically skilled
persons work on or with the device. Read the operating manual of the
coupling device carefully.
PE
U
S
2A
L+
L-
Type: AGH150W-4
Nominal voltage: DC 0…1760 V
Operative uncertainty: 15 % min. +/- 5 k
Ω
Art.-No.: B 98 018 006
Behaviour of system:
• If the ISOMETER® is operated with a coupling device, this device must be specified in
the commissioning assistant during commissioning or in the device menu later on.
• If a coupling device is selected during the commissioning or in the device menu, the
ISOMETER® automatically sets the system type to 3AC. This setting must not be
changed.
• If the ISOMETER® is operated with a coupling device, the DC alarm and the coupling
monitoring are deactivated.
• If the ISOMETER® is operated with a coupling device, the values of the coupling
monitoring, the DC offset and the measured values are not determined correctly.
12.2 Connection using the AGH150W-4(3(N)AC)
PE
U
S
2A
L1
L2
L3
N
Type: AGH150W-4
Nominal voltage: 3(N)AC 0…1150 V
Operative uncertainty: 15 % min. +/- 5 k
Ω
Art.-No.: B 98 018 006
