Bender EDS440-L - 3 Function; Features; Areas of Application; Standards

EDS44x_D00201_07_M_XXDE/06.2020
10
Function
3. Function
3.1 Features
3.1.1 Areas of application
• Insulation fault location in AC, 3(N)AC and DC IT systems
• Main circuits and control circuits in industrial plants and ships
• Diode-decoupled DC IT systems in power plants
• Systems for medical locations
3.1.2 Standards
The standard for unearthed power supplies (IT systems) DIN VDE 0100-410 (VDE 0100-
410):2007-06 (IEC 60364-4-41:2005, modified) requires that the first insulation fault is to
be eliminated with the shortest practicable delay. EDS systems enable fast localisation of
this insulation fault.
3.1.3 System variants
The insulation fault locators EDS440-x and EDS441-x differ depending on their response
sensitivity. The EDS440-x is suitable for main circuits.
The EDS441-x can be used in control circuits and in circuits in medical locations.
* High response sensitivity with large system leakage capacitances
** In combination with CTAF...SET series measuring current transformers
-L -S -LAB-4 -LAF-4
EDS
440
Channel LED
BS bus
I
∆L
= 2…10 mA
Main circuits
Digital inputs and
outputs
No channel LED
BB bus
I
∆L
= 2…10 mA
Main circuits
No internal
voltage supply
Channel LED
BS bus
I
∆L
= 10 mA **
Main circuits
Digital inputs and
outputs
EDS
441
Channel LED
BS bus
I
∆L
= 0.2…1 mA
Control circuits
Digital inputs and
outputs
No channel LED
BB bus
I
∆L
= 0.2…1 mA
Control circuits
No internal
voltage supply
Channel LED
BS bus
I
∆L
= 0.2…1 mA*
Control circuits
W…AB current
transformers
Digital inputs and
outputs
3.1.4 System properties
• 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 series W…, WR…, WS… measuring current transformers
• 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: EDS440 2…10 mA, EDS441 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 button
• Central display of faulty outgoing circuits
• Serial interface RS-485, BS bus address range 2…79
•
Connection to higher-level control and visualisation systems possible .
3.1.5 Compatibility
Legend:
BS bus: Full compatibility, communication via BS bus
BB bus: Full compatibility, communication via BB bus
◊ = Full compatibility, no communication possible
# = Limited compatibility + communication via BS bus
Limited display of messages on the device.
Limited parameterisation via the device possible.
! = Limited compatibility + communication via BS bus
Display of all messages on the device.
No parameter setting via the device possible.