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Isolation Transformer: used to establish a new neutral-ground bond in order to correct common mode and other grounding problems. A transformer can provide conversion of a Delta system (3 wire) to a Wye connected (4 wire) system. A shielded isolation transformer provides excellent protection from all types of N-G disturbances (impulses, RMS voltage, and high frequency noise). It also protects against voltage transients and spikes while offering full rd galvanic isolation, traps 3 harmonic and triplen harmonics. We hereby introduce ourselves as a manufacturer of dry type power transformers and reactors. We are established in this field since 2003. Our Dry Type Transformer adopt high quality low loss silicon sheet and arranged non-bobbin coil winding technology, and we apply vacuum pressure impregnating (VPI) process and solidify baking process to achieve insulation class H or C. Our transformers are widely used on any occasions where voltage is below 1000V and frequency below 400 Hz, and equipment’s which require voltage to step up or down. For small to medium capacity transformers, we apply enamel wire winding, and we apply foil winding for large capacity ones. Features 1) There are air flows between coil's layer to layer and between coil to core, resulting fast heat dissipation, and low temperature rise. 2) High grade iron core and winding can be wire or foil. 3) Small volume, light weight and good workmanship. 4) After vacuum pressure impregnating, the whole transformers and reactors are moisture proof and mildew proof. Insulation class H or C. 6) Lower audio noise. 7) Nomex based insulation system for foil winding transformers. Type 1) Step up Isolation Transformer 2) Step down Isolation Transformer Testing Our all magnetics are tested as per routine test mentioned as per IS2026. We can carry out other type testing as per your need. Applications of Isolation Transformers There is also some special application of isolating transformers, such us pulse transformers which transmit rectangular pulse signals and provide the electrical isolation. This type is suitable in some computer network designs, CNC machines, etc. Our products range is as under: 1) Single/3 phase Transformer, upto 300KVA, 50Hz - 400Hz. 2) Scott Connected (3phase - 2phase conversion)/ Open delta type (3phase--single phase conversion) 3) Input Chokes for A.C/D.C Drives, from 1hp to 750hp drives 4) Output Chokes for A.C/D.C Drives, from 1hp to 750hp drives 5) DC filter choke 6) Harmonic Filter Choke 7) Transformers for Plasma Welding Machines 8) Transformers with induction heating purpose.
Auto transformer is kind of electrical transformer where primary and secondary shares same common single winding. So basically it’s a one winding transformer. We hereby introduce ourselves as a manufacturer of dry type power transformers and reactors. We are established in this field since 2003. Our Dry Type Transformer adopt high quality low loss silicon sheet and arranged non-bobbin coil winding technology, and we apply vacuum pressure impregnating (VPI) process and solidify baking process to achieve insulation class H or C. Our transformers are widely used on any occasions where voltage is below 1000V and frequency below 400 Hz, and equipment’s which require voltage to step up or down. For small to medium capacity transformers, we apply enamel wire winding, and we apply foil winding for large capacity ones. Features 1) There are air flows between coil's layer to layer and between coil to core, resulting fast heat dissipation, and low temperature rise. 2) High grade iron core and winding can be wire or foil. 3) Small volume, light weight and good workmanship. 4) After vacuum pressure impregnating, the whole transformers and reactors are moisture proof and mildew proof. Insulation class H or C. 5) Lower audio noise. 6) Nomex based insulation system for foil winding transformers. Type 1). Step up Auto Transformer 2). Step down Auto Transformer Testing Our all magnetics are tested as per routine test mentioned as per IS2026. We can carry out other type testing as per your need. Applications of Auto Transformers Compensating voltage drops by boosting supply voltage in distribution systems. Auto transformers with a number of tapping are used for starting induction and synchronous motors. Auto transformer is used as variac in laboratory or where continuous variable over broad ranges are required. Our products range is as under: 1) Single/3 phase Transformer, upto 300KVA, 50Hz - 400Hz. 2) Scott Connected (3phase - 2phase conversion)/ Open delta type (3phase-single phase conversion) 3) Input Chokes for A.C/D.C Drives, from 1hp to 750hp drives 4) Output Chokes for A.C/D.C Drives, from 1hp to 750hp drives 5) DC filter choke 6) Harmonic Filter Choke 7) Transformers for Plasma Welding Machines 8) Transformers with induction heating purpose.
Constant Voltage Transformer: The Ferroresonant Transformer , F erroresonant Regulator or C onstant-Voltage Transformer is a type of saturating transformer used as a voltage regulator. These transformers use a tank circuit composed of a high-voltage resonant winding and a Capacitor to produce a nearly constant average output voltage with a varying input current or varying load. The circuit has a primary on one side of a magnet shunt and the tuned circuit coil and secondary on the other side. The regulation is due to magnetic saturation in the section around the secondary. The ferroresonant approach is attractive due to its lack of active components, relying on the square loop saturation characteristics of the tank circuit to absorb variations in average input voltage. Saturating transformers provide a simple rugged method to stabilize an AC power supply. Older designs of ferroresonant transformers had an output with high harmonic content, leading to a distorted output waveform. Modern devices are used to construct a perfect sine wave. The ferroresonant action is a flux limiter rather than a voltage regulator, but with a fixed supply frequency it can maintain an almost constant average output voltage even as the input voltage varies widely. The ferroresonant transformers, which are also known as Constant Voltage Transformers (CVTs) or ferros, are also good surge suppressors, as they provide high isolation and inherent short-circuit protection. A ferroresonant transformer can operate with an input voltage range ±40% or more of the nominal voltage. Output power factor remains in the range of 0.96 or higher from half to full load. Because it regenerates an output voltage waveform, output distortion, which is typically less than 4%, is independent of any input voltage distortion, including notching. Efficiency at full load is typically in the range of 89% to 93%. However, at low loads, efficiency can drop below 60%. The current-limiting capability also becomes a handicap when a CVT is used in an application with moderate to high Inrush Current like Motors, Transformers or Magnets. In this case, the CVT has to be sized to accommodate the peak current, thus forcing it to run at low loads and poor efficiency. Minimum maintenance is required, as transformers and capacitors can be very reliable. Some units have included redundant capacitors to allow several capacitors to fail between inspections without any noticeable effect on the device's performance. Output voltage varies about 1.2% for every 1% change in supply frequency. For example, a 2 Hz change in generator frequency, which is very large, results in an output voltage change of only 4%, which has little effect for most loads. It accepts 100% single-phase switch-mode power supply loading without any requirement for derating, including all neutral components. Input current distortion remains less than 8% THD even when supplying nonlinear loads with more than 100% current THD. We Arzoo Energy with the Experience of more than 16 years as the manufacturer of many Electrical Products are the known manufacturer of Constant Voltage Transformers. SAVE POWER,SAVE WORLD
Our Dry Type Transformer adopt high quality low loss silicon sheet and arranged non-bobbin coil winding technology, and we apply vacuum pressure impregnating (VPI) process and solidify baking process to achieve insulation class H or C. Our transformers are widely used on any occasions where voltage is below 1000V and frequency below 400 Hz, and equipments which require voltage to step up or down. For small to medium capacity transformers, we apply enamel wire winding, and we apply foil winding for large capacity ones. Features • There are air flows between coil's layer to layer and between coil to core, resulting fast heat dissipation, and low temperature rise. • High grade iron core and winding can be wire or foil. • Small volume, light weight and good workmanship. • After vacuum pressure impregnating, the whole transformers and reactors are moisture proof and mildew proof. • Insulation class H or C. • Lower audio noise. Type Isolation Transfonner: used to establish a new neutral­ ground bond in order to correct common mode and other grounding problems. A transformer can provide conversion of a Delta system (3 wire) to a Wye connected (4 wire) system. A shielded isolation transformer provides excellent protection from all types of N-G disturbances (impulses, RMS voltage, and high frequency noise). It also protects against voltage transients and spikes while offering full galvanic isolation, traps 3rd harmonic and triplen harmonics.
We Arzoo Energy the leading Manufacturer and Exporter of Industrial Automatic Voltage Controller (AVC) upto 500KVA , Silicon Power Rectifiers (0-500V, up to 2000 Amps), Distribution & Power Transformer up to 15 MVA with 11/22/33 KV Class, HT & Built in AVRs, Dry type & Isolation Transformers along with Special Purpose Transformers. We Command a highly skilled & experienced workforce at our plant guided by a team of competent Engineers which are highly experienced in this line. We believe in Quality oriented products and with State of the Art technology. We have established a renowned name as Arzoo Energy that has made a major Break-through in the field of engineering and electricity saving. Our high quality product and efficient services to our valued customers have enabled us with ample success. We would like to inform you that we are one of the leading manufacturers of above mentioned products and assure you that we are in position to supply the same with best quality and strong services after sale. We would like to inform you that in our AVC and rectifiers, we use Rolling contact type regulators where carbon roller are rolling on both sides of the coil, resulting in lesser wear and tear of the system. Also the overall cross-section area of the copper used in these regulators is more, resulting in increase in overall duty cycle of the equipment. The economic life of our stabilizers is easily 15-20 years. So, you can plan stabilizers as per your running load , keeping in mind your future expansions plans.
Introduction to Stabilizer: The embedding of microprocessor chip technology and power electronic devices in the design of intelligent AC voltage stabilizers (or automatic voltage regulators (AVR)) led to produce high-quality, stable electric power supply in the event of significant and continuous deviation of mains voltage. As advancement to the conventional relay type voltage stabilizers, modern innovative stabilizers use high performance digital control circuits and solid state control circuitry that eliminates potentiometer adjustments and allows the user to set voltage requirements through a keypad, with output start and stop facility. What is a Voltage Stabilizer? It is an electrical appliance which is designed to deliver a constant voltage to a load at its output terminals regardless of the changes in the input or incoming supply voltage. It protects the equipment or machine against over voltage, under voltage, and other voltage surges. Why Voltage Stabilizers Are Needed? Generally, each and every electrical equipment or device is designed for a wide range of input voltage. Depending on the sensitivity, the working range of the equipments are limited to a specific values, for instance, some equipments can tolerate ± 10 percent of the rated voltage while others ± 5 percent or less. The voltage fluctuations (rise or dip of the magnitude of rated voltage) are quite common in many areas, especially at terminated lines. The most common reasons for voltage fluctuations are lighting, electrical faults, faulty wiring and periodic turning off the device. These fluctuations create mishap to the electrical equipments or appliances Servo Controlled Voltage Stabilizers These are simply termed as servo stabilizers (work on servomechanism which also known as negative feedback) and the name suggests it uses a servo motor to enable the voltage correction. These are mainly used for high output voltage accuracy, typically ±1 percent with input voltage changes up to ± 50 percent. The figure below shows the internal circuit of a servo stabilizer which incorporates servo motor, auto transformer, buck boost transformer, motor driver and control circuitry as essential components. In this stabilizer, one end of buck boost transformer primary is connected to the fixed tap of the auto transformer, while other end is connected to the moving arm that is controlled by the servo motor. Secondary of the buck boost transformer is connected in series with incoming supply which is nothing but stabilizer output. Electronic control circuit detects the voltage dip and voltage rise by comparing the input with built-in reference voltage source. When the circuit finds the error, it operates the motor that in turn moves the arm on the autotransformer. This could feed the primary of buck boost transformer such that a voltage across the secondary should be the desired voltage output. Most servo stabilizers use embedded microcontroller or processor for the control circuitry to achieve intelligent control. These stabilizers can be single-phase, three-phase balanced type or three-phase unbalanced units. In single phase type, a servo motor coupled to the variable transformer achieves the voltage correction. In case of a three-phase balanced type, a servo motor is coupled with three auto transformers such that stabilized output is provided during fluctuations by adjusting the output of the transformers. In an unbalanced type of servo stabilizers, three independent servo motors coupled with three auto transformers and they have three separate control circuits. There are various advantages of using servo stabilizers compared with relay type stabilizers. Some of these are higher correction speed, high precision of stabilized output, capable to withstand inrush currents, and high reliability. However, these require periodic maintenance due to the presence of motors.
A manufacturer of dry type power transformers and reactors.
Harmonic Distortion Sources and Effects Events over the last several years have focused attention on certain types of load on the electrical system that results in power quality problems for the user and utility Equipment which has become common place in most of the facility. Non - linear loads generates voltage and current harmonics, which can have adverse effect on equipments, which are designed for operation as linear loads (i.e. Loads designed to operate on a sinusoidal waveform of 50 or 60 Hz.) Effects of non-linear load: Higher heating losses in the transformers Harmonic can have a detrimental effect on emergency generators, telephone and other sensitive electrical equipments. When receive power compensation (in the form of passive power factor improving capacitors) is used with non-linear loads, resonance condition can occur that may result in even higher levels of harmonic voltage and current distortion, thereby causing equipment failure, disruption of power services, and fire hazards in extreme conditions. The electrical environment has absorbed most of these problems in the past. However, the problem has now increased in a magnitude where Europe, the US, and other countries have proposed standards to responsible engineer system considering the electrical environment. IEEE 519-1992 and IEC 555 have evolved to become a common requirement cited when specifying equipment on newly engineered projects. The broad band harmonic filter was designed in part, to meet this specification. The present IEEE 519-1992 document establishes acceptable levels of harmonics (voltage and current) that can be introduced into the incoming feeders by commercial and industrial users. Where there may have been little cooperation previously from manufacturing to meet such specification, the adoption of IEEE 519-1992 and other similar world standards now attract the attention of everyone. Generation of harmonics: Harmonics are sinusoidal wave forms. They have frequency in multiple of fundamental frequency. They are produced by equipment using frequency conversion technology. They are also generated due to power drawing pattern of non-linear loads. Mitigation of Harmonic Distortion For resolution of harmonic problem, various techniques have been proposed to reduce the impact of load harmonic currents on the input current to an electrical system. Essentially, the intent of all these techniques is to make the input current more continuous so as to reduce the overall current harmonic distortion. The various techniques can be classified into four broad categories, a) The use of line reactors and / or DC link chokes b) Installation of passive filters (series, shunt, and low pass broad brand filters) c) Phase multiplication (12-pulse, 18-pulse rectifier system.) d) Harmonic compensation by active filtering. Harmonic protection filters are used for improvement of power factor and part elimination of harmonics. They are nothing but a combination of reactors and capacitors, suitably detuned. They are useful when distortion is 15 to 40 %. Advantages of Harmonic Filters: a) Protect capacitors from harmonic overloading. b) Eliminate upto 97 % predominant harmonics. c) Avoid harmonic amplification in the system. d) Improve power factor. This system can be configured to operate in fully automatic mode. The objective is to eliminate high level of harmonic current to acceptable level to comply with utility regulation. They provide traps for individual harmonics frequency and provide reactive power compensation at fundamental frequency. Harmonic filtering offers the following benefits: 1) Elimination of power factor penalty. 2) Improvement in reduction in energy bill.( due to improvement of PF) 3) Release of additional VA capacity in the system. 4) Improvement in voltage profile. 5) Reduction in line losses 6) Reduction in harmonic currents. 7) Improvement in overall power quality. 8) Improvement in life of electrical equipment. 9) Improvement in system reliability.
Harmonic Distortion Sources and Effects Events over the last several years have focused attention on certain types of load on the electrical system that results in power quality problems for the user and utility Equipment which has become common place in most of the facility. Non - linear loads generates voltage and current harmonics, which can have adverse effect on equipments, which are designed for operation as linear loads (i.e. Loads designed to operate on a sinusoidal waveform of 50 or 60 Hz.) Effects of non-linear load: Higher heating losses in the transformers Harmonic can have a detrimental effect on emergency generators, telephone and other sensitive electrical equipments. When receive power compensation (in the form of passive power factor improving capacitors) is used with non-linear loads, resonance condition can occur that may result in even higher levels of harmonic voltage and current distortion, thereby causing equipment failure, disruption of power services, and fire hazards in extreme conditions. The electrical environment has absorbed most of these problems in the past. However, the problem has now increased in a magnitude where Europe, the US, and other countries have proposed standards to responsible engineer system considering the electrical environment. IEEE 519-1992 and IEC 555 have evolved to become a common requirement cited when specifying equipment on newly engineered projects. The broad band harmonic filter was designed in part, to meet this specification. The present IEEE 519-1992 document establishes acceptable levels of harmonics (voltage and current) that can be introduced into the incoming feeders by commercial and industrial users. Where there may have been little cooperation previously from manufacturing to meet such specification, the adoption of IEEE 519-1992 and other similar world standards now attract the attention of everyone. Generation of harmonics: Harmonics are sinusoidal wave forms. They have frequency in multiple of fundamental frequency. They are produced by equipment using frequency conversion technology. They are also generated due to power drawing pattern of non-linear loads. Mitigation of Harmonic Distortion For resolution of harmonic problem, various techniques have been proposed to reduce the impact of load harmonic currents on the input current to an electrical system. Essentially, the intent of all these techniques is to make the input current more continuous so as to reduce the overall current harmonic distortion. The various techniques can be classified into four broad categories, a) The use of line reactors and / or DC link chokes b) Installation of passive filters (series, shunt, and low pass broad brand filters) c) Phase multiplication (12-pulse, 18-pulse rectifier system.) d) Harmonic compensation by active filtering. Harmonic protection filters are used for improvement of power factor and part elimination of harmonics. They are nothing but a combination of reactors and capacitors, suitably detuned. They are useful when distortion is 15 to 40 %. Advantages of Harmonic Filters: a) Protect capacitors from harmonic overloading. b) Eliminate upto 97 % predominant harmonics. c) Avoid harmonic amplification in the system. d) Improve power factor. This system can be configured to operate in fully automatic mode. The objective is to eliminate high level of harmonic current to acceptable level to comply with utility regulation. They provide traps for individual harmonics frequency and provide reactive power compensation at fundamental frequency. Harmonic filtering offers the following benefits: 1) Elimination of power factor penalty. 2) Improvement in reduction in energy bill.( due to improvement of PF) 3) Release of additional VA capacity in the system. 4) Improvement in voltage profile. 5) Reduction in line losses 6) Reduction in harmonic currents. 7) Improvement in overall power quality. 8) Improvement in life of electrical equipment. 9) Improvement in system reliability.
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