571 Operation/Maintenance Instructions Page 10 of 19
Three phase machines only:
1 fuse blown
Machine jammed
It is possible for 3 phase machines to
operate with only 2 phases of the
supply. This will create an overload
situation and will eventually cause
premature failure, this is known as
single phasing. Check all fuses.
Check spindle is free to rotate, clean
as necessary.
For a motor (particularly a single-phase
permanent capacitor motor) to reach
its required starting torque a healthy
line voltage is essential.
5.0 Switch Gear
5.1 Start / Stop Buttons
The motor is started by pushing the green (power on) button on the starter panel, and stopped
using the red (power off) button.
5.2 Circuit Protection
In case of a mains failure the starter is fitted with no volt release protection and will not restart
without being switched on again. The starter is also fitted with an overload protection device.
An electrical overload occurs where an electric motor is subjected to a greater load than it was
designed for. This can be caused by short circuit, by incorrect installation, or by misuse
(including poor machine maintenance). The inbuilt breaker will therefore help prevent damage
to the motor should such a situation occur. The motor cannot be restarted until the breaker has
reset itself.
5.3 Optional Padlockable Isolator
With this switch in the OFF position the machine is effectively isolated
from the supply to allow personnel safe access for maintenance or repair
work and to prevent dangerous restarts. In order to prevent unauthorised
use of the machine the switch can also be secured in the OFF position
using a padlock.
To operate the machine, first turn the isolator to the ON position.
5.4 Optional Emergency Foot Operated Stop Switch
This switch is provided for use in emergency situations only. We do not
recommend that it is used in lieu of the stop switch on the front of the
starter panel. The foot switch, once pressed will remain locked in the off
position. To restart the machine it is necessary to release the switch by
pulling it towards you.
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