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Sigma Electricals
location Pokhran, Thane, Maharashtra

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Our Products

  1. Transformers 6 Products available

  2. Electronic Components

    1 Products available

Transformers

Our offered Product range includes Ultra Isolation Transformer, Auto Transformer, Power Transformers, Low Loss High Efficiency Transformers and Constant Voltage Transformer.

Ultra Isolation Transformer

Ultra Isolation Transformer
  • Ratio :
  • 1 : 1 Load Regulation
  • : Within 4%
  • DC Isolation :
  • Over 1000 Mega Ohms between any windings or windings to ground Interwinding Capacitance
  • : 0.005 PF maximum
  • Common Mode Noise Rejection :
  • Over 120 db Break Down Strength
  • : 2.5 KV
  • Acceptable Line Frequency :
  • 47 to 63 Hz Efficiency
  • : Greater than 95%

SALIENT FEATURES

Isolates the equipment from noisy powerline.Reduces powerline Noise, Surges, Spikes & Transients. High Insulation resistance.Provides the complete Electromagnetic & Electro static shielding.

Applications : Computers & Peripherals Analytical Instruments Communication Equipments CNC Machines Medical Instruments.

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Auto Transformer

Auto Transformer

The autotransformers are frequently used to convert local Power line Voltage to some other Voltage value needed for a particular piece of equipment. Most often, this conversion is from 125 Volts to 250 Volts, or 250 Volts to 125 Volts. Autotransformers may also be used in voltage reduction type, lighting energy saving units (economy models), it may also be used as soft-starters for squirrel-cage induction motors.

Unlike an Isolation transformer, autotransformers use common windings and offer no interference or disturbance isolation, it would obviously a low cost option for voltage ratio conversion . You add any Suppression or Filtering networks your system requires.

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Power Transformers

Power Transformers

Sigma specializes in designing and manufacturing, optimally designed Buck-Boost Transformers for your servo stabilizer/ solid-state stabilizer. Sigma also manufactures control transformers to suit your needs. Higher power transformers mainly used in power electronic equipment like Battery chargers, FCBC, UPS are supplied by sigma.

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Low Loss High Efficiency Transformers

Low Loss High Efficiency Transformers

There are strip wound cores, hence there is no air-gap in the flux path or the core can be built with distributed air-gap controlling the value of the (permiability).

The strip wound cores have minimum losses and have power ideal from small toroidal transformers to utility level distribution transformers. At sigma we have technology to design efficient magnetics in different configurations.

The cores are available in different BH curve fitting configurations. For example square are ( cobalt based ) which can be used to switch core.

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Constant Voltage Transformer

Constant Voltage Transformer
  • Input Voltage 170V - 270V (50Hz)
  • Output Voltage 220V/230V +/- 2%
  • Efficiency Better than 80% at rated load
  • Energy Storage 3 msecs.
  • Protection a.  Continuous output short circuit b.  Over load (Output droop characteristic
  • Correction Time Less than 40 Milliseconds
  • Output wave form Sinewave, THD less than 5%
  • CMRR Noise Rejection 100 dB    
  • Total galvanic Isolation 3 kV

SALIENT FEATURES

  • Stabilizer, Spike Suppressor, Line Filter, Isolation Transformer ALL IN ONE
  • Built-in Short Circuit & Overload Protection
  • No interruption at output for small duration line interruptions/Brown-outs.
  • Built-in Spike, Surge & RFI Suppression
  • No electrical noise, as no moving parts or semi-conductors are used.
  • 100 times faster than servo stabilizer.
  • Can work at very low voltages on partial load.
Power output (VA)
:
 150, 350, 500, 750, 1000, 1500, 2000, 3000, 5000
Input Voltage
:
 110, 220, 240, 380, 415 (any other on request)
Output Voltage
:
 110, 220, 240, 380, 415 (any other on request)
Single phase upto 5 KVA & Three Phase upto 15 KVA available
DC output regulated ( Battery Charger/ Instrumentation supplies types) could be supplied.
Inverter grade CVTs can also be designed and supplied.
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Isolation Transformers

Isolation Transformers

Controlled Power manufactures the widest range of power equipment for regulating, conditioning, isolating, purifying, and distributing incoming electrical power. State of the art technology is utilized in all products to optimize performance characteristics for various applications. This equipment is utilized in all products to optimize performance characteristics for various applications. This equipment is utilized to protect sensitive electronic systems from erratic operation and failure due to power line transients, noise, or factors due to high harmonic current caused by the load.

Product Features :
The ULTRA K has many features to assure the user of reliable, trouble free, safe operation if the proper K-rating is utilized. A Few of the many features are:
  • Multiple K-rating selection, K-4, K-7, K-13, K-20
  • Designed for linear and nonlinear loads
  • All Copper construction
  • Removes triplen harmonic currents from the line
  • High Efficiency
  • UL Listed for K-Factor Operation
  • Double or triple shield for high common mode noise attenuation
  • Transverse mode noise attenuation
  • Optional filter for additional high-frequency mode noise attenuation
  • Solves 88% of typical power disturbance problems
  • Heavy-duty cabinet construction
  • Optional lightning surge protection - CAT B3
  • Optional input/output breakers
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