Bender ISOSCAN W Series - System Variants; System Properties

ISOSCAN® EDS440 and EDS441
2.2.3 System variants
The devices ISOSCAN® EDS440 and EDS441 differ depending on their response sensitivity. EDS440 is suitable
for main circuits. EDS441 can be used in control circuits and in circuits in medical locations.
-L -S -LAB-4 -LAF-4
EDS440 Channel LED
BS bus
I
ΔL
= 2…10 mA
Main circuits
Digital inputs and
outputs
No channel LED
BB bus
I
ΔL
= 2…10 mA
Main circuits
No internal voltage
supply
Channel LED
BS bus
I
ΔL
= 10 mA
2)
Main circuits
Digital inputs and
outputs
EDS441 Channel LED
BS-Bus
I
ΔL
= 0.2…1 mA
Control circuits
Digital inputs and
outputs
No channel LED
BB bus
I
ΔL
= 0.2…1 mA
Control circuits
No internal voltage
supply
Channel LED
BS-Bus
I
ΔL
= 0.2…1 mA
1)
Control circuits
W…AB current
transformers
Digital inputs and
outputs
1) High response sensitivity with large system leakage capacitances
2) In combination with CTAF...SET series measuring current transformers
2.2.4 System properties
■
Universal system design
■
Modular design, therefore easily adjustable to the given circumstances
■
Measuring current transformers available in various sizes and versions
■
CT connection monitoring
■
Twelve measuring channels for series W…, WR…, WS… measuring current transformers
■
Optional extension by twelve 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.
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