26. - 28.11.2019
Electric Automation - Systems & Components
|Date:||26. - 28. November 2019|
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The insulation fault locators ISOSCAN® EDS440 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 IRDH575 or the locating current injector PGH and evaluate them correspondingly. Up to 12 measuring current transformers can be connected to an EDS440. In total, up to 21 insulation fault locators can be connected via an RS-485 interface (BS bus protocol) and thereby up to 252 outgoing circuits can be monitored.
iso685-D: This device variant ISOMETER® iso685-D features a high-resolution graphic LC display and operating controls for direct operation of the device functions. It cannot be combined with an FP200.
iso685-S: This device variant ISOMETER® iso685-S features neither a display nor operating controls. It can only be used in combination with the FP200 and it is operated via this front panel.
Option "W": The ISOMETER®s with and without integrated display are available with option „W“ for extreme climatic and mechanical conditions (ISOMETER® iso685W-D and iso685W-S).
The 6-channel residual current monitor RCMS150 is intended for measurement of AC and DC fault currents in earthed systems, which can emerge from insulation faults on loads with six-pulse rectifiers or one-way rectifiers with smoothing. The device can measure residual currents up to IΔ = 500 mA in a frequency range of DC 0…2 kHz. Two separately adjustable response values allow a distinction to be made between prewarning and alarm.
The device features an RS-485 interface which can be used to transfer measured values and alarm values. Setting parameters is also possible via this interface.
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