Vikrant Motors - Safety

How to Use Electric Motor

Flange Mounted  Installation

Installation B5

Installation B5

Installation B14

Installation B14

Installation B34

Installation B34

Installation B35

Installation B35

Installation V1

Installation V1

Installation V3

Installation V3

Foot Mounted  Installation

Installation B3

Installation B3

Installation B6

Installation B6

Installation B7

Installation B7

Installation B8

Installation B8

Wiring Guidelines

“Vikrant” motors up to 3kw normally designed for star connection for 415V, 50Hz, 3 Phase supply, but with increasing usage of 230V inverter, these motors are supplied with six terminals to create star or delta connection as required. Motors above 4kw are normally supplied with six terminals for star-delta connections. Motors with six terminals have to be connected in accordance with supply conditions. Verify the connection instruction before putting the motor in operation. With different connections of the motor, it is possible to use the same motor of different voltage supplies (Dual voltage motor).

Star Connection

Star Connection Diagram
Star Connection

On a six termination plate, connect U1, V1 and W1 with the link supplied along with the motor and connect three-phase supply wires to U2 , V2 and W2 to connect the motor in star connection.

Delta Connection

Delta Connection Diagram
Delta Connection

On a Six termination plate, connect V1-U2, U1-W2 and W1-V2 with the link supplied along with the motor and connect three-phase supply wires to U1, V1 and W1 to connect the motor in delta connection.

While changing the connections, ensure that the rated Voltage is maintained on the supply to brake, rectifier or any other type of accessories / equipment which are directly connected to the motor termination.

PROTECTION (ELECTRICAL)

DOL starting

kW/HP Average Current Fuse Rating Relay Range
0.37/0.5 1.1 4 1-2
0.55/0.75 1.4 6 1.2
0.75/1.0 1.9 6 1.2
1.1/1.5 2.6 6 2-4
1.5/2.0 3.7 10 2-4
2.2/3.0 4.8 16 3-6
3.7/5.0 7.8 16 6-12
5.5/7.5 11.2 25 6-12
7.5/10 15 25 10-16
9.3/12.5 18 35 18-24
11/15 21 35 18-24
15/20 27 50 16-32
18.5/25 33 63 24-45
22/30 39 63 24-45
30/40 53 100 32-63
37/50 65 100 50-90
45/60 78 160 50-90

STAR-DELTA starting

kW/HP Line Average Current Relay Range
Phase Fuse Rating
3.7/5.0 7.8 4.5 16 1.5-3
5.5/7.5 11.2 6.5 25 4-8
7.5/10 15 9 25 6-12
9.3/12.5 18 11 35 6-12
11/15 21 12.7 35 10-16
15/20 27 16.8 50 18-24
18.5/25 33 20.2 63 18-24
22/30 39 23.2 63 18-24
30/40 53 30.6 100 16-32
37/50 65 37.5 100 24-45
45/60 78 46.4 160 32-50
55/75 92 53.2 200 50-63

PLEASE PAY ATTENTION BEFORE STARTING YOUR ELECTRIC MOTOR

  • For your motor’s protection, you should have to check proper motor earthing connection.
  • For motor’s good working capacity :
    • 1.  For single phase : 230 Voltage ± 10%
    • 2.  For three-phase :400 Voltage ± 10%
  • If your motor working on low voltage or two phase then your motor loading capacity will be decrease and it may be caused some major fault [like damage motor winding].
  • Before start your motor, first you check wire connection, switches or starters in your wiring from your Technician. If not, then motor will get too hot or Problem occurs during starting under loading condition.
  • Installed / Store a motor far away from water as well as possible.
  • If your motor’s pulley will be install properly on shaft otherwise loosely or out surface condition may be effect on your motor’s performance, (like motor’s bearing is to be damaged too fast.)
  • If your motor running in overload then your motor also get too hot, so that condition please check your machinery & your motor’s loading capacity.
  • If any problems in your motor, you can contact the company immediately.
  • For good performance of your production, for your power bill and your motor related query, you should have to check your machine & motors from your technician on periodic maintenance.

If you keep in your mind all these important things then you can save your electricity as well as maintenance charge.

Reason of Winding failure of Electric Motors
Winding Single-Phased (Y-Connected)

Winding Shorted
Turn-To-Turn

Winding With Shorted Coil

Winding With Shorted Coil

Winding Grounded at Edge of Slot

Winding Grounded
at Edge of Slot

Winding Grounded at the Slot

Winding Grounded at the Slot

Shorted Connection

Shorted Connection

Winding Damage Due To Overload

Winding Damage
Due To Overload

Damage Caused By Locked Roto

Damage Caused
By Locked Rotor

Winding Damaged By Voltage Surge

Winding Damaged
By Voltage Surge

Winding Shorted Phased-To-Phased)

Winding Shorted
Phased-To-Phased

Winding Singl Phased (Y-Connected)

Winding Single Phased
(Y-Connected)

Winding Single-Phased (A-Connected)

Winding Single Phased
(A-Connected)

Phase Damaged Due to Unbalanced Supply Voltage

Phase Damaged Due to Unbalanced Supply Voltage