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The bigger safety switches are
DC-20-categorized
This means that the switch shall not operated when
loaded.
A handle that can padlocked into both positions is
available request.
All handles the enclosed switches can equipped
with padlocks, which prevent the operating O-position. Electrical
interlocking with push button, which installed the
door the enclosure, for operating the safety switch is
available accessory. There is
also lock frame available, which can provided with
key locking for Castell, Lowe&Fletcher Ronis.
From I-position to
O-position^fifst
the switch the
main circuit and
then the switch of
the magnetizing
circuit.o.
40
1SCC340006C0201
ABB
. Although the
safety switch DC-23 utilization
category able break full motor
current (4xIe), using the safety
switch motor controller not
recommended. Furthermore, connecting the
interlocking coil the control unit the rectifier bridge,
the breaking full DC-load can prevented. order prevent operating mistakes, they can
be equipped with various locking devices. auxiliary contacts the
utilization category\DC-23 safety
switch have earlybreak feature,
meaning that they open before the
contacts the safety switch--------
Connecting the auxiliary contacts
to the rectifier bridge control
circuit recommended, because
it enables the currentless
operation the safety switch
to OFF-position.
Interlocking
The n.
The switch disconnectors are
mechanically interlocked that they can be
perated only the right order:
From O-position
to I-position: first
the switch the
excitation circuit
and then the switch
of the main circuit.The operating principle safety switches
There are two switch disconnectors in
DC safety switches: one for the main circuit
and the other for the excitation circuit and
control circuit auxiliary contacts
