ELR W 3/9-400
ELR W 3/9-500
Electronic Reversing-Load Relay
for 3-Phase Networks
Data Sheet
01/2005
Features
Electronic Reversing-Load Relay
ELR W 3/9...
ELR W 3/9... electronic reversing-load relays are the
practical and user-friendly further development of
electronic load relays for 3-phase networks.
The ELR W 3/9... is the fully electronic alternative to
mechanical contactors. It features a compact design
and low control power. A further advantage is the high-
quality, safe screw connection technology.
These components feature high switching
frequencies, virtually unlimited service life, no spark
interference, and completely silent switching at zero
voltage crossing. The compact, DIN rail-mountable
modules meet all the requirements of an electronic
reversing contactor circuit that has been designed
specifically for industrial applications. Both the
interlocking of control inputs and the complete wiring
of the load contacts are incorporated in the device.
Costly locking switches and contact wiring are thus a
thing of the past.
In accordance with DIN VDE 0110 and
DIN VDE 0636, a conductor cross section
of 1.5 mm2 (16 AWG), which must be
fitted with one fuse each (10 A slow-blow
as mains protection), is required to
connect the electronic load relay to the
3-phase network.
Cabling has been reduced to an absolute minimum.
Only the following must be applied:
–
Control voltage, supply voltage
input and output
–
3-phase load
The status is clearly indicated by separate LEDs for
"right rotation", "left rotation", "operating voltage" or
"impermissible control".
A short circuit between two phases at the moment of
switching is prevented by the integrated delay
between the control pulse and the load control.
RCV protective circuits on the output side reduce
voltage peaks that occur in the load circuit to a safe
level and prevent damage to the output electronics.
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