AMETEK CTs NetWave
9.10. Opt-3 IMD - Insulation Monitoring Device
The insulation monitor is an external device connected to the NetWave. It constantly monitors the insulation
resistance of the phases (L1, L2, L3) to the protective earth. In case the insulation resistance is below a set
limit, the safety circuit is tripped and the output of the NetWave is switched off.
The switch “FLOATING – PE” must be set to the “floating” position. Otherwise the insulation
monitor will detect the insulation failure and will switch off the NetWave.
To perform measurement where it is required to have N and PE connected, it is necessary to
disconnect the Insulation Monitor from the NetWave. Make sure to reinstall the safety circuit
directly to the NetWave.
The NetWave limits the output voltage to 600VDC when operating in the High Voltage DC
Mode (Opt-3 DC-EVR). This prevents the NetWave from damage in case of wrong electrical
connection of the outputs.
Insulation Monitoring Device (MD)
Manufacturer: Bender
Type: iso 685
Application: 3-ph NetWave up to 32 A
Voltage: AC :690 V, DC: 1000 V
The manual for this insulation monitor can be downloaded here:
https://www.bender.org/documents/manuals/iso685-D_D00022_M_XXEN.pdf
Connection schematic
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