• Brand NameStarlit Electricals
• Capacity40 KVA
• ConstructionIndoor Varnish Impregnated Dry type with
• No of Phases3 / 3 enclosure
• Vector GroupDyn11
• Tapping ArrangementOffline tap changer with tap changing
• Insulation ClassB / F Links
• Ratio433 / 433

• Brand NameStarlit Electricals
• Capacity500HP
• No. of PhasesThree Phase
• Insulation Level0.66/3 kV
• Voltage Rating415 V
• Tapings50%, 65%, 80%
• Duty Cycle6 starts per hour and 20 seconds per start
• Class of InsulationA
• CoolingOil - Cooled
• ConstructionIndoor, with enclosure and first filling of oil

• Brand NameStarlit Electricals
• Rating500 KVA
• Ratio11000 / 433 V
• Tap ChangerBy means of offload tap changer
• Tapings+/- 2.5% , +/-5%
• Vector GroupDyn11
• Type of CoolingONAN
• No. of Phases3/3 A
• Insulation Level12/28/75 KV
• App StdIS 2026

Owing to the vast experience of this domain, Starlit Electricals is engaged in manufacturing and supplying Residual Voltage Transformer. RVTs are used for residual earth fault protection and for discharging capacitor banks..   RVTs are used for residual earth fault protection and for discharging capacitor banks. The secondary residual voltage winding is connected in open delta. Under normal conditions of operation, there is no voltage output across the residual voltage winding. When there is an earth fault, a voltage is developed across the open delta winding which activates the relay. 3 phase RVTs typically have 5 limb constructions. Tests A number of routine and type tests have to be conducted on VT s before they can meet the standards specified above. The tests can be d. classified as: Accuracy tests to determine whether the errors of the VT are within specified limits. Dielectric insulation tests such as power frequency withstand voltage test on primary and secondary windings for one minute. Induced High Voltage test: The voltage is induced on the secondary winding at frequency of 100 or 150 Hz for 6000 cycles to verify the with stand ability of the V.T at higher voltages. Impose tests with 1.2/50us wave Positive and Negative flashes of equal magnitude. Temperature rise tests Verification of terminal markings and polarity the routine tests are carried out in the test lab located in our factory premises itself. The type tests are conducted at NABL accredited labs such as ERDA or CPRI located in India.  

• Open Circuit Voltage0 to 5 KV or 0 to 10 KVAC. The above voltage can be continuously varied from zero to full value and is continuously monitored by Analog/Digital Panel meter.
• Test Current2 mA to 20 mA OR 3 mA to 100 mA
• Accuracy of Reading Power±2%
• Requirements Safety230 volts AC, ± 10%, 50/60 Hz
• PrecautionsVoltage on test terminals. High Voltage on test jig appears only after the variac is set to zero and gradually increased. There is a trip device to trip if the current increases than the required value
• Trip settingsThe tripping can be reset by a pot which can be varied as peruse requirement
• Accuracy Of Reading±2%
• Power Requirements230 volts AC, ± 10%, 50/60 Hz
•  Protection provided with zero start to prevent accident availability of High

High Tension Current Transformer is used to measure the current for HT consumer.   d to measure the current for HT consumer.

High Tension Current Transformer is used to measure the current for HT consumer.   d to measure the current for HT consumer.

We have gained expertise in delivering a quality range of Earthing Transformers with various capacities. The wide range of Earthing Transformers offered by our firm is well designed by experts in compliance with the international quality standards.   In cases where the neutral point of three phase system is not accessible like the system connected to the delta connected side of an electrical power transformer, an artificial neutral point may be created with help of a zigzag connected Earthing Transformer. This is a core type transformer with three limbs. Every phase winding in zigzag connection is divided into two equal halves. One half of which is wound on one limb and other half is wound on another limb of the core of transformer. End point of all three windings ultimately connected together and forms a common neutral point. Now if any fault occurs at any of the phases in delta connected system, the zero sequence fault current has close path of circulating through earth as shown in the figure. In normal condition of the system, the voltage across the winding of the Earthing Transformer is 1/V3 times of rated per phase voltage of the system. But when single line to ground fault occurs on any phase of the system, as shown in the figure, zero sequence component of the earth fault current flows in the earth and returns to the electrical power system by way of earth star point of the Earthing Transformer. It gets divided equally in all the three phases. Hence, as shown in the figure,    the currents in the two different halves of two windings in the same limb of the core flow in opposite directions.  And therefore the magnetic (lox set up by these two currents will oppose and neutralize each other. As there is no increase in flux due to fault current, there is no extra dcp/dt means no extra voltage induced across the winding   and no choking effect occurs to impede the tow of fault current. So it can be concluded like that, the zigzag type Earthing or grounding transformer maintains the rated supply voltage at normal current as well as when a solid   single line to ground fault current flows through it. The rated voltage of an Earthing or grounding transformer is the line to line voltage on which it is intended to be used. Current rating of this transformer is the maximum neutral current in Amperes that the transformer is designed to carry in fault condition for a specific time. Generally the time interval, for which transformer designed to carry the maximum fault current through it safely, is taken as 9 second.  

• Brand NameStarlit Electricals
• Rating500 KVA
• Ratio11000 / 433 V
• Tap ChangerBy means of offload tap changer
• Tapings+/- 2.5% , +/-5%
• Vector GroupDyn11
• Type of CoolingONAN
• No. of Phases3/3 A
• Insulation Level12/28/75 KV
• App StdIS 2026

• Brand NameStarlit Electricals
• Capacity500HP
• No. of PhasesThree Phase
• Insulation Level0.66/3 kV
• Voltage Rating415 V
• Tapings50%, 65%, 80%
• Duty Cycle6 starts per hour and 20 seconds per start
• Class of InsulationA
• CoolingOil - Cooled
• ConstructionIndoor, with enclosure and first filling of oil

• Ratio440/200V
• Rating:15KVA
• Insulation Level0.66/2.5KV
• Primary Tapping+2.5, +5%
• Transformer Class‘B’/’F’
• App. Std.11171/1985.
• ConstructionIndoor,Varnish Impregnated dry type/Cast Resin in open execution.

Owing to the vast experience of this domain, Starlit Electricals is engaged in manufacturing and supplying Residual Voltage Transformer. RVTs are used for residual earth fault protection and for discharging capacitor banks..   RVTs are used for residual earth fault protection and for discharging capacitor banks. The secondary residual voltage winding is connected in open delta. Under normal conditions of operation, there is no voltage output across the residual voltage winding. When there is an earth fault, a voltage is developed across the open delta winding which activates the relay. 3 phase RVTs typically have 5 limb constructions. Tests A number of routine and type tests have to be conducted on VT s before they can meet the standards specified above. The tests can be d. classified as: Accuracy tests to determine whether the errors of the VT are within specified limits. Dielectric insulation tests such as power frequency withstand voltage test on primary and secondary windings for one minute. Induced High Voltage test: The voltage is induced on the secondary winding at frequency of 100 or 150 Hz for 6000 cycles to verify the with stand ability of the V.T at higher voltages. Impose tests with 1.2/50us wave Positive and Negative flashes of equal magnitude. Temperature rise tests Verification of terminal markings and polarity the routine tests are carried out in the test lab located in our factory premises itself. The type tests are conducted at NABL accredited labs such as ERDA or CPRI located in India.