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Motor started will have overloads the contactor connect es line voltage.
The link in the star contactor is used to form the star point of three of the motor leads. On most star wound motors the star point is inside the motor windings. On a motor that can be used for star delta starting it is a six wire motor. The star point winding depends on the contactor to tie the coil ends together externally in the control panel of the star delta starter.
A motor starter is a contactor (heavy duty relay) which acts as a remote-controlled on/off switch between the supply and the motor. Its operating coil is energised through an auxiliary stop/start circuit. It also incorporates overload function which will automatically disconnect the motor in the event of a sustained overload current.
On the load side of the contactor. T1,T2,T3.
I think one is conventional starter motors and the other is Gear-reduction starter motor.
Motor started will have overloads the contactor connect es line voltage.
Which connects starter motor and the battery temporary to get sufficient power to starter motor.
It is on the starter itself and is called the starter solenoid. Heavy current is handled by the solenoid which is activated by the ignition switch. Current comes from the igniton switch, then to the s terminal on the starter which then connects heavy amperage to the starter motor itself.
That is the star point contactor that opens when it goes into the delta configuration.
No, it connects to the flywheel.
A definite purpose contactor is designed (and rated) for a specific load. So a lighting contactor is one example of a definite purpose contactor. A motor starter contactor is another example. So, a lighting contactor is a definite purpose contactor, but a definite purpose contactor is not necessarily a lighting contactor (it might be a motor starter, for instance).
yes
Various components can be added and removed from a contactor. Auxiliary contacts can be inserted in front of the main contacts, as well as a time relay in the case of motor starters (star/delta starter). Usually you should fit a overload relay when you use the contactor in a motor starter, this is inserted in the main contacts at the bottom. However, the internal components like the coil may never be changed or replaced.
In all cases of removing a starter motor disconnect the battery negative terminal, then take the old starter motor off and bolt the new one on. Then reconnect the battery negative terminal.
Electric current from the battery goes to solenoid, it clicks in and connects the full power of battery to starter main terminal, this spins the starter motor over, the starter Bendix gear on the end of the motor shaft spins around and forward about an inch to engage the gearing on the rim of the flywheel. This turns and when speed is up it throws the starter gear back to it's rest position.
You start with a normal one way circuit consisting of a three phase contactor and an three phase overload in series for the forward circuit. Then you add the reverse contactor in parallel with the forward contactor but with line one and line two crossed over i.e. when the reverse contactor is made, line one of the supply will be connected to line two of the motor and line two of the supply to line one of the motor. The control circuit must also be interlocked to prevent forward and reverse being energized at the same time.
Follow the thick red cable from the positive terminal on the battery. It leads straight to the starter motor.