Page 139 - L . V S W I T C H G E A R

Contactor intelligent

The idea of working:
TLJpes of thermal
overload:
when the motor current increase form a reason, the
thermal degree increase in the thermal coils which con- thermal overload connected at
nected in series with motor coils, so the thermal degree contactor by wires .
increase, then this coils stretching and this stretching
led to move part inside it, the movement of this part led
to disconnect connected point and this point in series
ĐŽŶŶĞĐƟŽŶ ǁŝƚŚ ĐŽŶƚĂĐƚŽƌ ďŽƵďŝŶĂ ƐŽ ĚŝƐĐŽŶŶĞĐƚ ƚŚĞ
current of contactor.

Thermal overload connected
directly.
There is three poles connected
directly to contactor.
&ƵŶĚŝŶŐ ůĂƌŐĞ ŐƌĂĚĂƟŽŶ Ăƚ ƚŽƉ
right for ampere in blue color
ĂŶĚ ƐĞƚ ŝƚ Ăƚ ƐƉĞĐŝĮĐ ǀĂůƵĞ Ăƚ ŝƚ
disconnects the motor.
&ŽƵŶĚŝŶŐ ƐŵĂůů ŐƌĂĚĂƟŽŶ Ăƚ ůĞŌ
ƐŝĚĞ ŝŶ /ƚ ŐƌĂĚĂƟŽŶ ͕ , ͗
;ĐŽŶŶĞĐƚƐ ĂŶĚ ĚŝƐĐŽŶŶĞĐƚ
ĂƵƚŽŵĂƟĐͿ͘

For right working must be manual con- , ;ĐŽŶŶĞĐƚƐ ĂŶĚ ĚŝƐĐŽŶŶĞĐƚ
manual).
nected, due to if it automaƟc connected

and occur fault, it start working again

aŌer cooling the thermal coils.

There are 3 points (U-V-W) or (1-3-5) connected to con-
tactor directly.
There are (T1-T2-T3) or (2-4-6) main points connected to
power circuit.
The helping point: open contact 97, 98 and closed con-
tact 96, 95 which connected to control circuit.

For maintenance:

By avometer we select the buzzer and check the coils for
ĐŽŶƚĂĐƚŽƌ ϭϭ ĂŶĚ Ϯ ŵƵƐƚ ĚŽ ďƵnjnjĞƌ͘
LJ ƐĞůĞĐƟŶŐ ǀŽůƚĂŐĞ ĂŶĚ ŵĞĂƐƵƌĞ ƚŚĞ ǀŽůƚĂŐĞ ďĞ-
tween 3 phases for input terminals and output terminals
to know the input and output of it.

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