Direct-On-Line Or Star/Delta Starting; Terminals And Direction Of Rotation; Handling; Storage - ABB MT serie Installations- Betriebs Und Wartungshandbuch

Drain hole plugs, if fi tted, must be removed and closing
valve, if fi tted, must be opened during heating.
Windings drenched in seawater normally need to be
rewound.
2.1.3 Direct-on-line or star/delta
starting
The terminal box on standard single speed machines
normally contains 6 winding terminals and at least one
earth terminal.
Earthing must be carried out according to local
regulations before the machine is connected to the
supply voltage.
The voltage and connection are stamped on the rating
plate.
Direct-on-line starting (DOL):
Y or D winding connections may be used.
e.g. 660 VY, 380 VD indicates Y-connection for 660 V
and D-connection for 380 V.
Star/Delta starting (Y/D):
The supply voltage must be equal to the rated voltage
of the machine in D-connection.
Remove all connection links from the terminal block.
For two-speed, single phase and special machines,
supply connection must follow the instructions inside
the terminal box.
If direct-on-line starting lasts for more than 10 seconds
or Y/D starting more than 30 seconds, consult ABB
Sales Offi ce or see the publication 'The Motor Guide'
(also available on the internet on www.abb.com/
motors&drives).
2.1.4 Terminals and direction of
rotation
Direction of rotation is clockwise when viewing the shaft
face at the machine drive end, when the line phase
sequence L1, L2, L3 is connected to the terminals as
shown in the fi gure 1.
To alter the direction of rotation, interchange the
connection of any two line cables.
If the machine has a uni-directional fan, ensure that the
direction of rotation is according to the arrow marked on
the machine.
ABB / Low Voltage Motors / Manual 12-2004

2.2 Handling

2.2.1 Storage

The machine should always be stored indoors, in dry,
vibration free and dust free conditions.
Unprotected machined surfaces (shaft-ends and
fl anges) should be protected with anti-corrosive
treatment.
It is recommended that shafts be rotated periodically by
hand to prevent grease migration.
Anti condensation heaters, if fi tted, should preferably be
energised.
The characteristics of electrolytic capacitors, if fi tted to
single-phase motors, will require "reforming" following
periods of storage exceeding 1-2 years.
Contact ABB Sales Offi ce for details.

2.2.2 Transportation

Machines fi tted with cylindrical-roller and/or angular
contact bearings must be fi tted with locking devices
during transport.

2.2.3 Lifting

Lift the motor using the lifting lugs only, if not otherwise
stated in the separate lifting instruction.
The center of gravity of motors with the same frame
may vary due to different outputs, mounting
arrangements and auxiliary equipment.
Check that eyebolts or the lifting lugs integrated with the
motor frame are undamaged before lifting. Damaged
lifting lugs must not be used.
Lifting eyebolts must be tightened before lifting.
If needed the position of the eyebolt must be adjusted
with suitable washers.
Ensure that proper lifting equipment is used and that
the sizes of the hooks are suitable for the lifting lugs.
Care must be taken not to damage auxiliary equipment
and cables attached to the motor.
5 – GB