Automatic Starter to Ease up your Work
Transformer Testing Made Easy with DVDF Test Set
The dvdf test set will serve remarkably for the automatic operation ability given in it. Just set it at the right measurement as per your demands and the device will come in handy for Induced Over Voltage withstand Test of 3-Phase Distribution and Power Transformer ranging from 16 KVA to 50 MVA rating along with 3-Phase Motor Generator set , 3-Phase Motorised variable auto transformer of suitable quantity.
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By this test we can checks the inter term insulation.For a transformer of 11 KV/433 V class 866 volts are applied at the 433 volts winding sidewith the help of the generator for 1 minute. This induces 22 KV on 11 KV side. The 50 Hz frequency of the 866 V supply is also increased to 100 Hz. As a top dvdf test set suppliers in India, we S.B.Electrotech have made this device as much handy as possible. Our engineers have designed the product to match the strength in the transmission for residential and industrial purposes. Just be with us, the best dvdf manufacturers in india and use our product today and have the absolute manufacturing/repairing work done right!
- Motor Generator Set.
- Fully Automatic Starter.
- Desk type CONTROL PANEL.
- Intermediate Auto Transformer.
- Three Phase Variable Auto Transformer.
- Digital Meters will be provided for all parameters.
- KEY ITEMS FOR TRANSFORMER TEST BENCH.
- Automatic Tripping arrangement will be provided in all Individual Setup.
- Digital Timer is provided along with ON-OFF Switch to set the Testing Duration Time.
A complete common Test Bench to perform No Load Test (OC Test), Full Load Test (SC Test), Induced Over Voltage withstand Test (DVDF Test), High voltage test for LT & HT, To measure NO load & Full Load Losses, Efficiency, Impedance, Insulation and other Electrical parameters of 3-Phase Distribution and Power Transformer ranging from 16 KVA to 50 MVA rating along with 3-Phase intermediate Transformer of Suitable capacity, 3-Phase Motorized variable auto transformer of suitable capacity :- 440 Volts Input & 0-470 Volt output, Motor Generator set of Slip Ring Motor & Induction Motor along with suitable contactors, Panel meters &Required accessories.
| Input | 415 V, 3 Phase, 4 Wire, 50 Hz A.C |
| For DVDF Test | 0 – 1000 V, 3 Ph. 100 Hz. At Four Different Taps. |
| Duty | Intermittent |
For DVDF functionality, Control and the same Loading transformer unit along with the same variable motorized auto transformer are used. ( N.B. Generally, above 1 MVA, there comes into place an additional 3rd unit in the form of variable auto transformer. Above 3 MVA, the Loading Transformer comes into place as an additional 4th unit ). The inclined front panel has indicating lamps, HRC fuses, push buttons, mode changing rotary switches, voltmeter selector rotary switches, digital frequency meter ( for DVDF ) along with its toggle switch to indicate Input/output frequency and these are all part of ‘ Control unit’. 1 no. Digital voltmeter of 96 sq.mm. is provided for Input voltage measurement and 1 no.
Digital AC voltmeter of 96 sq.mm. for measuring the Output voltage. Besides these, 3 individual Digital ammeters of 96 sq.mm. are also connected to 3 different phases for measuring Output currents in the respective phases and all these meters are for DVDF purpose. Mounted inside are current measuring CT’s, voltage measuring P.T’s ( for DVDF purpose ), contactors, automatic star-delta starters ( for DVDF ) , loading transformer, variable auto transformer ( if rating is above 1 MVA, the auto transformer will be treated as a separate unit as previously mentioned in nota-bene. ) 4 nos. casting wheels at the bottom of powder coated sturdy steel cabinet is provided for easy mobility. 4 nos. lifting hooks are also there for lifting purpose. All nomenclatures are engraved in anodized aluminum plates which are placed on the inclined front panel.
One Three Phase Intermediate Booster Transformer of Intermittent Rating is used to boost the Motor Generator Output Voltage to the desired voltage level for applying in the Transformer Under Test. Three phase Booster Transformer is used to give a Long Lasting Life Cycle to the Motor-Generator Set. High Quality Copper is used for winding of the Three Phase Intermediate Booster Transformer.
| Input | 415 V, 3 Phase, 4 Wire, 5, 50 Hz A.C |
| For DVDF Test | 0 – 1000 V, 3 Ph. 100 Hz. At Four Different Taps. |
| Duty | Intermittent |
| Cooling | Air Natural Cooled |
THREE PHASE VARIABLE AUTO TRANSFORMER is used to vary the Output Voltage continuously.
SALIENT FEATURES :-
- The drop in Voltage from “No Load to Full Load” is minimal.
- It provides an output voltage waveform, which is a distortion-less replica of the input voltage waveform.
- Careful Copper & Core selection and design assures the user of low watt loss, as compare to other controllers.
- A Glass smooth commutator, special sintered bushing for the shaft and perfect assembling of coils results in low operating torque for all Variable Auto Transformer.
- A special Silver Plating Technique is used on the Commutator, enabling it to withstand high overloads and maintain Proper contact . It also ensures smooth operation, long life & increased resistance to corrosion.
| Input | 440 V, 3 Phase-4 Wire,50 Hz, AC |
| Output | 0 – 470 V, 3 Phase, 50 Hz, AC |
| Capacity | As per system requirement. |
| Cooling | Air Natural Cooled / Oil Cooled |
THREE PHASE MOTOR GENERATOR SET is used in TRANSFORMER TEST BENCH to perform Induced Over Voltage Test (Double Voltage Double Frequency Test). MOTOR GENERATOR SET is a combination of Three Phase Slip Ring Motor & Three Phase Induction Motor. It provides Variable Output Voltage Motor will be in Old Casing, Newly Winded & Heat Varnished to reduce the Voltage & give a Long Lasting Life time. Two Motors are Coupled with each other on a MS Channel Frame.
- For Slip-Ring Motor UPTO 600 HP
- For Squirrel Cage Motor UPTO 300 HP
- Input : 415 V Three Phase, 50 Hz through Fully Automatic Starter.