Sigma Electricals Pokhran, Thane, Maharashtra

 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.

Three-legged, saturable-core reactor. SECOND HALF CYCLE another approach to solving the problem of load flux affecting control flux is shown in figure. Figure shows a toroidal saturable-core reactor. The shape of these cores is a toroid (donut shape). The windings are wound around the cores so that the load flux aids the control flux in one core and opposes the control flux in the other core.

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.

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

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.

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.

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

We design and build AC as well as DC Chokes as per customer requirement. We have standard designs to support line reactors as well as output reactors for AC and DC drives. We also have standard designs to support Power Factor controllers, where the chokes are built to reduce harmonics. One only needs to specify KVAR rating. We can design filters to support harmonic mitigation. We can design reactors to integrate into your systems, like Battery chargers, UPS, Static Line conditioners (power factor and harmonic correction), Charging chokes for microwaves/ pulse modulators…. The list is unlimited.

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.