ACS850-04 drive modules (160 to 560 kW, 200 to 700 hp)

Grounding

These instructions are intended for all who are responsible for the grounding of the drive. 

WARNING! Ignoring the following instructions can cause physical injury, death, increased electromagnetic interference and equipment malfunction:

• Ground the drive, motor and adjoining equipment to ensure personnel safety in all circumstances, and to reduce electromagnetic emission and interference. 

• Make sure that grounding conductors are adequately sized as required by safety regulations.

• In a multiple-drive installation, connect each drive separately to protective earth (PE).

• Where EMC emissions must be minimized, make a 360° high frequency grounding of cable entries at the cabinet lead-through in order to suppress electromagneti disturbances. In addition, connect the cable shields to protective earth (PE) in order to meet safety regulations. 

Note: 

• Power cable shields are suitable for equipment grounding conductors only，when adequately sized to meet safety regulations.

• As the normal leakage current of the drive is higher than 3.5 mA AC or 10 mA DC, a fixed protective earth connection is required by EN 61800-5-1, 4.3.5.5.2.

Permanent magnet motor drives

These are additional warnings concerning permanent magnet motor drives. 

WARNING! Ignoring the instructions can cause physical injury or death, or damage to the equipment.

• Do not work on the drive when the permanent magnet motor is rotating. Also, when the supply power is switched off and the drive is stopped, a rotating permanentmagnet motor feeds power to the intermediate circuit of the drive and the supply connections become live 。Before installation and maintenance work on the drive:

• Stop the motor.

• Ensure that there is no voltage on the drive power terminals according to step 1 or 2, or if possible, according to the both steps.

1. Disconnect the motor from the drive with a safety switch or by other means. Measure that there is no voltage present on the drive input, output or DC terminals (U1, V1, W1, U2, V2, W2, UDC+, UDC-).

2. Ensure that the motor cannot rotate during work. Make sure that no other system, like hydraulic crawling drives, is able to rotate the motor directly or through any mechanical connection like felt, nip, rope, etc. Measure that there is no voltage present on the drive input, output or DC terminals (U1, V1, W1, U2, V2, W2, UDC+, UDC-). Ground the drive output terminals temporarily by connecting them together as well as to the PE.

General safety

These instructions are intended for all who install and service the drive. 

WARNING! Ignoring the following instructions can cause physical injury or death, or damage to the equipment:

• - Lift the drive module using the lifting lugs attached to the top and base of the unit. 

- Handle the drive module carefully. Make sure that the module does not fall down when moving it on the floor and during installation and maintenance 

work: Open the support legs by pressing each leg a little down (1, 2) and urning it aside. When ever possible secure the module also with chains.

- Do not tilt the drive module (A). It is heavy (over 160 kg [350 lb]) and its center of gravity is high. The module will overturn from a sideways tilt of 5 degrees. Do not leave the module unattended on a sloping floor.

- Push the drive module into the cabinet and pull it from the cabinet carefullypreferably with help from another person as shown below. Keep a constant pressure with one foot on the base of the module to prevent the module from falling on its back. Use safety shoes with metal toe cap to avoid foot injury. Do not use the ramp with plinth heights which exceed the maximum height marked on the ramp next to the fastening screw. (The maximum plinth height is 50 mm when the telescopic ramp is shortest and 150 mm when the ramp is longest.) Tighten the two fastening bolts of the ramp carefully. 

• Beware of hot surfaces. Some parts, such as heatsinks of power semiconductors, remain hot for a while after disconnection of the electrical supply.

• Make sure that dust from borings and grindings does not enter the drive when installing. Electrically conductive dust inside the unit may cause damage or malfunctioning.

• Ensure sufficient cooling.

• Do not fasten the drive by riveting or welding.WARNING! Ignoring the following instructions can cause equipment malfunction and damage to the fiber optic cables:

• Handle the fiber optic cables with care. When unplugging optic cables, always grab the connector, not the cable itself. Do not touch the ends of the fibers with bare hands as the fiber is extremely sensitive to dirt. The minimum allowed bend radius is 35 mm (1.4 in.).

Printed circuit boards

Safe start-up and operation

General safety

These warnings are intended for all who plan the operation of the drive or operate the drive. 

Permanent magnet motor drives

WARNING! Do not run the motor over the rated speed. Motor overspeed leads to overvoltage which may damage or explode the capacitors in the intermediate circuit of the drive. 

WARNING! Ignoring the following instructions can cause damage to the printed 

circuit boards:

• Wear a grounding wrist band when handling the boards. Do not touch the boards unnecessarily. The printed circuit boards contain components sensitive to electrostatic discharge. 

WARNING! Ignoring the following instructions can cause physical injury or death, or damage to the equipment:

• Before adjusting the drive and putting it into service, make sure that the motor and all driven equipment are suitable for operation throughout the speed range provided by the drive. The drive can be adjusted to operate the motor at speeds above and below the speed provided by connecting the motor directly to the power line. 

• Do not activate any automatic fault reset functions of the drive control program if dangerous situations can occur. When activated, these functions will reset the drive and resume operation after a fault. 

• Do not control the motor with an AC contactor or disconnecting device; instead, use the control panel keys and , or commands via the I/O board of the drive. The maximum allowed number of charging cycles of the DC capacitors, ie, power-ups by applying power, is five in ten minutes.

Note: 

• If an external source for start command is selected and it is ON, the drive will start immediately after an input voltage break or fault reset unless the drive is configured for 3-wire (a pulse) start/stop.

• When the control location is not set to local, the stop key on the control panel will not stop the drive.