Motor Starting Solutions

Need of Motor Starting Solution

Induction Motor during starting generates high starting current (Typically 6 to 7 times of full load current)
These leads to sudden dips in voltage & sudden jerk on the equipment
Such high current may results in increase winding temp, weakening winding & other adverse effect.
Hence it is preferred to start motor with FCMA/ Electronic soft starter or variable frequency drive (VFD).

Benefits of Motor Starting solutions

The Lower inrush current of Soft Starting reduces mechanical stress and minimizes penalties from the utility company.
Extending system lifetime due to reduced mechanical wear on:

The Motor
Belts and pulleys
Gears and chains
Couplings and bearings
Cavitation and water hammer in pumps

Reducing electrical effects:

Reducing the heavy current surge on the electrical supply which can be severe enough to cause voltage dips and flickering lights.
Pitting and burning of contacts due to high currents which are many times the motor full-load current.
The power cables run cooler.
Less stress upon Electrical Distribution system.

A) FCMA Soft Starter

FCMA Soft Starter working principle

FCMA soft starter full form is FLUX COMPENASTED MAGNATIC AMPLIFIER soft starter are step less, reduced voltage starter which ensures constant starting low current with incremental voltage & torque to the motor – to achieve smooth acceleration of motor. The soft Starter connected in series of the motor and thus controls the starting current & torque. As the motor speed increases FCMA impedance decreases due to back emf feedback to achieve incremental voltage & torque for the motor while keeping the current constant. A voltage across the motor increases smoothly from the starting value (50 – 60 %) to run value(94-98%) with motor speed. A built in contactor closes to ensure full voltage running of the motor. By pass contactor operation can be Time, Current or Speed based.

BENEFITS OF FCMA SOFT STARTER

Easy to Install & Operate.
Harmonic free starting eliminates electrical supply disturbance.
No Electronic component hence highly reliable in harsh electrical supply conditions like low voltage& frequency.
FCMA soft starter can be used for Squirrel cage as well as slip ring motors.
Available in Line side & Neutral side models.
Almost fail safe
Suitable for hazardous conditions like chemical, steel, sugar etc.

TYPES OF FCMA SOFT STARTER PRODUCTS

Soft Starter for a squirrel cage motor: Flux compensated Magnetic Amplifier (FCMA) soft starters are step-less reduce voltage starters that ensure a constant low starting current with incremental voltage and torque to the motor to achieve smooth acceleration of the motor.

Application of Squirrel Cage Motor: Pump, Fan, Blower, Compressor, Chiller, Test Bed etc.
Models Available: FCMA Soft Starter wiring diagram.

2.Soft Starter for Slip Ring motor: For slip ring motors we offer Automatic Slip Regulators (ASR) & Rotor Controller (RC) panels which are connected to rotor terminals of the motors so that the starting current is limited to a low value with a required starting torque.

Application of Slip Ring Motors: Leveler, Cutter, Fibrizor, Cane Chopper, Ball Mill, ID Fan, Mixing Mill, Shredder, etc.
Models Available:

We offer following rating of FCMA soft starter :

LT soft starter : – 11KW to 3MW for voltage 220 to 690 volts.
MV/HT soft starter : – 100KW to 10MW for voltage 2.2KV to 11KV.

B) Electronic Soft starter & Variable Frequency Drive (VFD)

When any AC induction motor becomes lightly loaded, the power factor and the efficiency decrease. This is caused by the inherent design of the motor and the laws of physics, and leads to energy being wasted. These are known as excitation losses.

Soft Starter continually monitors the power factor, recognizing when the motor is becoming lightly loaded and then instantly employing strategies to reduce the losses by controlling the voltage and current supplied to the motor to match the load conditions. This not only increases the part load power factor, but reduces the energy consumption in kW.

When the motor becomes fully loaded, the power factor increases, and Soft starter automatically bypasses itself to ensure the most efficient use of energy in all motor load conditions.See this example of the energy savings that could be made using Our Electronic Soft starter.