Sedgwick SM255t, Инструкция по эксплуатации и обслуживанию, Страница: 13 / 32

SM255t Operation/Maintenance Instructions Page 13 of 32
5.0 Switch Gear
5.1 The 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. 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.
5.2 Start / Stop Buttons
The motor is then started by pushing the green (power on) button on the starter panel and
stopped using the red (power off) button. The mushroom headed lock-off stop switch, once
pressed will remain locked in the off position. To restart the machine, it is necessary to release
the off button by twisting it in a clockwise direction.
5.3 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.
5.4 Brake Release Switch
Machines fitted with an electro-magnetic brake unit are also equipped with a ‘Brake
Release’ switch. This switch makes it possible to release the brake mechanism, allowing the
operator to rotate the spindle when changing or adjusting the cutting knives. To operate the
switch first turn the isolator to ON, release the mushroom headed lock-off stop switch, and
turn the brak
e release to ‘BRAKE RELEASE’. It is not possible to start the motor with the switch
in this position. To start the motor, turn the switch back to the RUN position.
5.4 Emergency Foot Operated Latching 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.