Terminals And Direction Of Rotation - ABB MT Série Manuel D'installation, D'exploitation Et De Maintenance

2. Installation
Putting into service (starting)
Reception check
Immediately upon receipt check the machine for external
damage and if found, inform the forwarding agent without
delay.
Check all rating plate data, especially voltage and
winding connection (star or delta). The type of bearing is
specified on the rating plate of all motors except the
smallest frame sizes.
Remove transport locking if employed.Turn shaft by
hand to check free rotation.
Do not exceed permissible loading values of bearings
stated in the product catalogue.
Motors equipped with roller bearings: Running the
motor with no radial force applied to the shaft may
damage the roller bearing.
Motors equipped with angular contact bearing:
Running the motor with no axial force applied in the right
direction to the shaft may damage the angular contact
bearing.
Motors equipped with regreasing nipples:
When starting the motor for the first time, or after long
storage of the motor, apply the specified quantity of
grease until grease is forced out of the grease outlet.
For details see section "Manual lubrication" on page 8.
Insulation resistance check
Measure insulation resistance before commissioning and
when winding dampness is suspected.
Resistance, measured at 25°C, shall exceed the
reference value, i.e. 10 M ohm (measured with 500 V dc
Megger)
WARNING
Windings should be discharged immediately after
measurement to avoid risk of electric shock.
Insulation resistance reference value is halved for each
20°C rise in ambient temperature.
If the reference resistance value is not attained, the
winding is too damp and must be oven dried.
Oven temperature should be 90°C for 12-16 hours
followed by 105°C for 6-8 hours.
Drain hole plugs, if fitted, must be removed and closing
valve, if fitted, must be opened during heating.
Windings drenched in seawater normally need to be
rewound.
4
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 Office or see the publication 'The Motor Guide'
(also available on the internet on www.abb.com/
motors&drives).

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 figure 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.
Handling
Storage
The machine should always be stored indoors, in dry,
vibration free and dust free conditions.
Unprotected machined surfaces (shaft-ends and flanges)
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 fitted, should preferably be
energised.
The characteristics of electrolytic capacitors, if fitted to
ABB / Low Voltage Motors / Manual 11-2002