Insulation fault locator ISOSCAN® EDS441

• Automatic insulation fault location • Application control circuits • 12 measuring channels for measuring current transformers • CT connection monitoring • Universal system concept The insulation fault locators ISOSCAN® EDS441 are used in connection with the ISOMETER® iso685-D-P or the locating current injector PGH to locate insulation faults in unearthed power supply systems (IT systems). They detect locating current signals generated by the insulation monitoring device iso685-D-P  or the locating current injector PGH and evaluate them correspondingly. Up to 12 measuring current transformers can be connected to an EDS441. In total, up to 50 insulation fault locators can be connected via an RS-485 interface (BS bus protocol) and thereby up to 600 outgoing circuits can be monitored. • Universal system concept • Modular design, therefore easily adjustable to the given circumstances • Measuring current transformers available in various sizes and versions • CT connection monitoring • 12 measuring channels for measuring current transformer series CTAC…, WR…, WS… • Optional extension by 12 relay channels • Fault memory behaviour selectable • Up to 50 EDS insulation fault locators in the system, 600 measuring channels • Response sensitivity 0.2…1 mA • AC residual current measurement with configurable response value • Two alarm relays with one N/O contact each • N/O or N/C operation selectable • External test/reset • Central indication of faulty outgoing circuits • Serial interface RS-485, BS bus address range 2…79, Modbus RTU • Connection to higher-level control and visualisation systems possible