13
EDS460-490_D00085_01_M_XXEN/02.2016
3. System description
3.1 Features
3.1.1 Areas of application
Insulation fault location in AC, AC / DC and DC IT systems
Main and control circuits in industrial installations and ships
Diode-decoupled DC IT systems in power stations
Systems for medical locations
3.1.2 Standards
The standard for unearthed power supply systems (IT systems) IEC 60364-4-41
requires that a first fault is to be eliminated with the shortest practicable delay.
Fast insulation fault location is possible with EDS systems.
3.1.3 System versions
EDS460, EDS461, EDS490 or EDS491 insulation fault locators differ in their re-
sponse sensitivity and/or number of alarm relays.
3.1.4 System features
Universal system concept;
Modular design, hence easily adaptable to the individual conditions of
the system;
Measuring current transformers in various sizes and types of construc-
tion;
Communication between the components via BMS bus (two-wire);
All measuring current transformers are scanned simultaneously;
Central indication of faulty sub-circuits;
Various setting options allow individual adjustments;
Connection to higher level control and visualisation systems can easily
be established.