Kongsberg Simrad MF90, Installation Manual

Page: 210 / 426

208
476671/B
Checking the hosting motor’s 3-phase AC connections
The electric hoisting motor on the hull unit requires 3-phase AC power for operation. The
physical connections to the motor are made inside the terminal box on the motor. To avoid
serious damage to the hoisting motor, and to ensure that the motor operates properly,
you must verify that the electrical connections are made in accordance with the supplied
3-phase AC voltage.
Prerequisites
• The MF90 system is turned off.
• The circuit breaker for the 3-phase AC power is closed. AC power is connected.
• All cable connections are made.
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 hoisting motor is mounted vertically at the top of the gantry. The upper part of the motor
is fitted to a gear box. This gear box is connected to the hoisting spindle using a timing belt.
The electrical connections to the hoisting motor are made inside the terminal box. The
3-phase supply voltage for the motor can be 230, 380 or 440 VAC at 50 or 60 Hz.
WARNING
High voltages are used. This equipment must be serviced only by qualified personnel
familiar with high-voltage equipment and the potential hazards involved. Failure to
observe this precaution could result in bodily injury.
Procedure
1 To disconnect power, disengage the circuit breaker for the 3-phase AC voltage.
2 Remove the cover on the power connections terminal box on the hoisting motor.
3 Verify that the electrical connections to the hoisting motor are made in accordance
with the supplied 3-phase AC voltage.
Refer to the illustration.
Simrad MF90 Installation Manual