I. Application:DW**0 air circuit breaker (hereinafter
referred as ACB), is suitable for distribution network of AC *0Hz,
with rated voltage of **0V/**0V, rated current of **0A ~ ***0A. It
can be used to distribute electric energy, protect the circuit and
power equipment against overload, under-voltage, short-circuit,
single-phase earthing, etc. ACB has intelligent protection
function, accurate fault diagnosis, good selectivity, high
sensitivity, and can improve the reliability and security of power
supply. Its easy to operate. Whats more, the operating mechanism
and related accessories produced by our factory is fully adapted to
this product.
II. Working Description of the Operating Mechanism:The product
includes operating modes of manual and electric, and adopts closing
method of spring energy storage (pre-energy storage). Closing speed
has nothing to do with electric and manual operation. The product
adopts a cam to compress a set of springs to achieve the purpose of
energy storage, and has a trip-free function.
The ACB has three operating positions:
a ) Energy storage: electrically operated or manually
operated external force drives the cam to rotate. Energy storage
lever is on the cam, the lever compresses the energy storage spring
as the cam rotates. When the cam rotates to a certain angle, energy
storage ends through a series of drive inside the mechanism.
b) Closing: press the ON (on the intelligent trip
unit or the supplied by the user to connect the energy -
releasing electromagnet), so that the energy - releasing tripping
Axle rotates, energy storage lever trips. Under the force of energy
storage spring, the spindle rotates driven by a powerful series of
transmission, so that the contact is closed.
c) Disconnect: pressing the OFF or the signal from
overcurrent, undervoltage and shunt,and test trip signal on the
intelligent trip unit, so breaking trip Axle rotates, and lever
trips, linkage mechanism changes, then the ACB is disconnected
rapidly under the reaction force of the contact and the reset force
of the spring.
* Interlocking mechanism: its installed on the right
panel of the ACB, stack assemble the ACB with rod connecting
interlock, to flat the ACB(fixed or drawout type) and interlock it
by steel cable, when one of the ACB is on, another will be off, the
interlocking mechanism should be installed by the user.
