Earth fault detection systems
ISOSCAN EDS440
The ISOSCAN® EDS440 insulation fault locators are used in conjunction with iSOMETER® iso685-D-P or the test current generator PGH, to localize insulation faults in unearthed Localization of insulation faults in unearthed power supplies (IT systems) (IT systems). For this purpose, they use measuring current transformers to record the generated by the iso685-D-P or IRDH575 insulation monitoring device or the PGH PGH locating current generator and evaluate them accordingly accordingly. Up to 12 measuring current transformers can be connected to an EDS440 can be connected to one EDS440. A total of up to 21 Insulation fault locators can be connected via an RS-485 interface (BS bus protocol) and thus monitor up to 252 outgoing circuits.
- Automated insulation fault location during operation
- Application of the main circuits
- 12 measuring channels for measuring current transformers
- Transformer connection monitoring
- Universal system concept
- Modular and expandable design
- Transformer connection monitoring
- 12 measuring channels for measuring current transformer series CTAC..., WR..., WS..
- Fault memory behavior selectable
- Setting options enable individual adjustments
- Up to 21 EDS insulation fault locators in the system, 252 measuring channels
- Response sensitivity 2...10 mA
- AC residual current measurement with adjustable response value
- Two alarm relays with one NO contact each
- Working/quiescent current selectable
- External test/reset button via digital inputs
- Display via iso685-D-P or LED display
- Central display of faulty outputs
- Serial interface RS-485, BS bus address range 2...90
- Connection to higher-level control and visualization systems possible
- Insulation fault location in AC, 3AC and DC IT systems
- Main and control circuits in industrial plants and ships
- Diode-decoupled DC IT systems in power plants
- Networks for rooms used for medical purposes
Connection diagram to 3(N)AC mains with an iso685-D-P
* Communication between iso685-x-P and EDS44x-L takes place exclusively via BS bus (RS-485).
