Bender Replacement B98018006 Coupling Device

Bender B98018006 Coupling Device (AGH150W-4) is a high‑voltage accessory designed to extend the nominal voltage range of Bender ISOMETER insulation‑monitoring systems. It is intended for use with the ISOMETER iso685 series to monitor insulation resistance on AC and DC IT networks, including unearthed systems. The device connects to the monitored circuit via two poles and to the ISOMETER via the AK160 terminal to AK or L1/L2/L3, enabling monitoring up to AC 0–1150 V and DC 0–1760 V. The AGH150W‑4 variant carries Art. No. B980180062 (distributors also list it as B98018006). All protective earth connections at the ISOMETER must be bonded to the protective earth conductor for safe operation. Standards compliance includes DIN EN 45545-2 and DIN EN 50155, reflecting suitability for railway and other safety‑critical environments. This coupling device is used with the AGH150W family to expand the nominal voltage range of iso685 ISOMETER devices, providing a practical solution when insulation testing and monitoring require higher voltage operation.