Function
12
isoLR275_D00127_00_M_XXEN/07.2018
2.2
Device features AGH-LR
Coupling device required for ISOMETER® isoLR275,
each AGH-LR is specially adapted to the corresponding isoLR275
Nominal voltage range AC 0…793 V and DC 0…1,100 V
DIN rail mounting
2.3
Product description
The isoLR275 ISOMETER® in conjunction with the AGH-LR coupling device
monitors the insulation resistance of IT systems. It is suitable for universal use
in 3(N)AC, AC/DC and DC systems. AC systems may include extensive DC-sup-
plied loads, such as converters or thyristor-controlled DC drives. The adapta-
tion to the existing system leakage capacitances takes place automatically.
Only use the AGH-LR coupling device supplied with the device for adaptation
of the nominal voltage range.
isoLR275 can share the BMS bus with other bus devices.
The devices isoLR275 and AGH-LR are ideally adapted to each
other. The corresponding combination device required in each
case can be identified via the serial number on the device label.
For repair work, both devices should be sent in in order to gua-
rantee measuring accuracy.
Otherwise, the measuring accuracy might be reduced!
