Kongsberg Simrad MF90, Installation Manual

Page: 216 / 426

214
476671/B
Checking the operation of the Hoisting and Lowering contactors
The
Hoisting Contactor
(K301) and the
Lowering Contactor
(K302) are located on the upper
DIN rail in the Motor Control Unit. Each contactor operates on +24 VDC supplied by the
internal power supply. When activated, the
Hoisting Contactor
(K301) starts the motor in
order to hoist the transducer. The
Lowering Contactor
(K302) starts the motor to lower
the transducer.
Prerequisites
Before you can do this task, the
following prerequisites must be met:
• The MF90 system is turned off.
• The circuit breaker for the 3-phase
AC power is closed. AC power is
connected.
• The transducer is in its upper position
with the
Upper Limit Switch
(S304)
activated.
You must be equipped with a standard
set of tools. This tool set must comprise
the normal tools for electronic and
electromechanical tasks. This includes
different screwdriver types, pliers,
spanners, a cable stripper, a soldering
iron, etc. Each tool must be provided
in various sizes. We recommend that all
tools are demagnetized to protect your
equipment.
Context
The following conditions must be set to activate
Hoisting Contactor
(K301):
• The
Hoist/Lower Switch
(S302) must be set to HOIST or REMOTE .
• The
Lowering Contactor
(K302) must be deactivated.
• The
Upper Limit Switch
must be deactivated with the transducer in its lower position or
on its way up.
• The
Hand Crank Switch
(S203) must be closed with the hand crank in its storage position.
The following conditions must be set to activate
Lowering Contactor
(K302):
• The
Hoist/Lower Switch
(S302) must be set to LOWER or REMOTE .
• The
Hoisting Contactor
(K301) must be deactivated.
Simrad MF90 Installation Manual