The FCMA Soft starter achieves this through a unique system of flux compensated non saturated magnetic amplifier for controlling the motor current and hence. Frequently asked questions about FCMA soft starters. 1. What is the difference between an FCMA and conventional magnetic amplifier or saturable core reactor . Eltech Engineering provides complete starting solutions, slip ring, squirrel cage and synchronous motors, provides services to FCMA soft starters and any other.

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FCMA Soft Starter

Thursday, May 13, Blogger Buzz: Blogger integrates with Amazon Associates. Posted by Hitesh Vadnagare at 4: Such high values of current stater following implications.

To eliminate these harmful effects, Soft Starters are used which reduce the starting current considerably and allow the motor to accelerate gradually. The Soft starters provide gradual increase in voltage up to rated voltage ensuring even acceleration. To summarize, Soft Starters can optimize the starting performance of motors and motor manufacture can concentrate on improving running performance to ensure lower life cycle costing.


Types of Soft Starters Various reduced voltage starting options have been available. An aggregate of approx. The FCMA is connected in series with the motor either on the line or neutral side, fc,a that the starting current is limited to a low value. As the motor speed increases the impedance of FCMA reduces steplessly to keep the current constant and increase the motor torque so that the load is accelerated. The FCMA works on the principle of superimposition of sinusoidal fluxes on a common magnetic core where the net flux is the vector sum of the two components.

As the net flux is sinusoidal the FCMA does not generate any harmonics.

FCMA Soft Starters

The motor current is kept constant due to the balancing effect of Cemf feedback. This aspect is thoroughly tested and certified while testing in India and Europe.

FCMA is totally non-saturable and hence does not generate any harmonics. The bypass device is designed for bypass duty i. The magnet is provided with a retentive core so that even in the event of control supply failure the osft opens only after 0. An additional coil protection relay is provided for additional safety.


This is innovative technology for incremental motor voltage and torque at constant reduced current. The values of starting current can be adjusted at site and six such adjustments are provided. No forced cooling required. No special protections are required for soft starters.

Conventional motor protections are sufficient. Closed transition hence no momentary disconnection of supply. It can also optimize total power system. This leads to large saving in Genset capacity and cost. Additionally the Genset will run at optimum strter and efficiency, leading to fuel saving.

B] Transformer starting Considerations — Transformer p.

This leads to saving in transformer capacity and cost. Posted by Hitesh Vadnagare at 3: Blogger integrates with Amazon Assoc About Me Hitesh Vadnagare View my complete profile.