Variable Autotransformer
Todays deals on Variable Autotransformer?
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Variac Variable Autotransformer W10G3M Three Phase $799.00 |
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Powerstat Variable Autotransformer Superior Elect. 15A $599.99 |
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Variac Variable Autotransformer Auto Transformer 3490 $499.99 |
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Power Supply W/ Powerstat 21 Variable Autotransformer HV High Voltage $395.00 |
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POWERSTAT VARIABLE AUTOTRANSFORMER type 246U spec 177502 4.2KVA 240VAC IN -NEW- $395.00 |
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PowerStat Variable Autotransformer 236B $371.07 |
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Powerstat variable auto transformer 3.1 KVA $350.00 |
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Powerstat 2pf136 / 3pn136 Variable Autotransformer $338.17 |
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Powerstat Variac Variable Autotransformer N116BK 10A $299.99 |
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POWERSTAT VARIABLE AUTOTRANSFORMER F236-2 DOUBLE $250.00 |
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Powerstat Variable Autotransformer Variac 3PN216C 240V In, 0-280V 3.5A, 1.0 KVA $254.99 |
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Powerstat Variable Autotransformer 216BU FREE SHIPPING $232.00 |
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Powerstat Variable Autotransformer 216BU FREE SHIPPING $232.00 |
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POWERSTAT Variable Auto transformer 3PN116C 0-140V 10A $219.00 |
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Staco 1.4 KVA Variable Auto Transformer 3PN 1010 Topaz $195.00 |
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Staco Energy Products Variable Auto Transformer 3PN1020 $200.00 |
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POWERSTAT VARIABLE AUTOTRANSFORMER 3PN216C $199.00 |
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Staco Variable Autotransformer 1510C _ 151OC _15A 120v $175.00 |
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POWERSTAT VARIABLE AUTOTRANSFORMER 3PN116C $175.00 |
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Powerstat F226 Variable Autotransformer 50/60Hz 7.5Amps 2.1KVA $187.49 |
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POWERSTAT VARIABLE AUTOTRANSFORMER 126U USED 126U $175.00 |
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Staco Variable Autotransformer 0-120/140V 10A 1.4KVA Type SQ 1010 $175.00 |
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POWERSTAT 116BU 1.4 KVA VARIABLE AUTOTRANSFORMER 0-140 VOLTS OUTPUT NEW $175.00 |
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PowerStat 1 KVA Variable Auto Transformer 3PN 116 Topaz $155.00 |
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VARIAC VARIABLE AUTOTRANSFORMER $150.00 |
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PowerStat 1.4KVA Variable Auto Transformer 3PF116B USA Staco $150.00 |
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PowerStat Variable Auto Transformer 8AMP/5AMP Topaz $135.00 |
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Staco Variable Autotransformer 033-35O4, used $140.00 |
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General Radio W5MT3 Variable Auto Transformer USA PowerStat Staco $125.00 |
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SUPERIOR ELECTRIC CO 3PN116C POWERSTAT VARIABLE AUTOTRANSFORMER 50/60 1PH ~ USED $123.95 |
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116B SUPERIOR ELECTRIC POWERSTAT AUTOTRANSFORMER VARIABLE 140VOLTS / 1.4KVA * $125.00 |
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Powerstat Variable Autotransformer Variac 3PN116C 0-140V 10A., 1.4 KVA $114.99 |
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STACO ENERGY Variable Autotransformer Ooutput-120/140V TYPE 3PN1010 $100.00 |
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Technipower W8 Variable Autotransformer 120v 8.5a 60c $100.00 |
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POWERSTAT VARIABLE AUTO TRANSFORMER TYPE 39N116C $99.00 |
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POWERSTAT VARIABLE AUTOTRANSFORMER 116B AS IS 10A $89.00 |
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Staco Energy Variable Auto Transformer *New* Type 171 $100.00 |
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Pair of 2 Vintage General Electric Variable Autotransformer Variac Transformer $75.00 |
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POWERSTAT VARIABLE AUTOTRANSFORMER $79.99 |
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Superior Electric Powerstat Variable Autotransformer 116BU $98.99 |
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Superior Electric Company L116B Powerstat Variable Autotransformer $75.00 |
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STACO Variable Autotransformer Type 2PF 1010 2PF1010 $75.00 |
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POWERSTAT 116 VARIABLE AUTOTRANSFORMER AS IS $79.00 |
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Powerstat – 116B – Variable Autotransformer $75.00 |
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STACO VARIABLE AUTOTRANSFORMER TYPE 171 NEW 171 $75.00 |
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Variable Autotransformer $65.00 |
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Staco Type 171 Variable Autotransformer Panel Mount NIB $69.99 |
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Powerstat Variable Autotransformer Type 136B $49.99 |
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TENMA VARIABLE AUTO TRANSFORMER $80.00 |
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STACO variable autotransformer 120v type 171 Type 171 $70.00 |
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Vintage General Radio Variable Autotransformer (Variac) Type W10 0-115V 10 Amp $50.00 |
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Powerstat Variable Autotransformer 216L w/ Housing $67.50 |
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STACO … VARIABLE AUTOTRANSFORMER … TYPE 3PN 1010 GUARANTEED No Reserve $53.00 |
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SUPERIOR ELECTRIC 2PF10 POWERSTAT VARIABLE AUTOTRANSFORMER 0-132V. 1 AMP. $49.99 |
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NEW Staco Variable Autotransformer Type 501 Panel Mount FREE SHIPPING $59.99 |
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STACO variable autotransformer 120v type 171 Type 171 $47.50 |
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Staco Energy Products Variable Autotransformer Type 3PN171 Output 1.75A 120v $44.00 |
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Vtg Staco Inc Type 2 PF 1010 Variable Autotransformer Variac 120V / 140V Switch $41.00 |
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VINTAGE ADJUST-A-VOLT VARIABLE AUTO TRANSFORMER 100 BU 120 VOLTS 1.25 AMP!!!1 $24.99 |
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SUPERIOR ELECTRIC POWERSTAT N10B 0-132 V VARIABLE AUTOTRANSFORMER – VARIAC $26.00 |
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Statco Energy Variable AutoTransformer $21.00 |
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Vintage Staco Type 2 PF 1010 Variable Autotransformer Variac 120V / 140V Switch $25.00 |
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VARIAC VARIABLE VOLTAGE AUTOTRANSFORMER 0-125V @6A $1.00 |
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Vtg General Radio Co Type W5MT3 Variable Autotransformer Variac 120V 0-140V Load $20.51 |
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Powerstat 0-280V Variable Power Autotransformer Variac $399.99 |
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NEW Superior Powerstat 1256DU Variable Autotransformer $1,600.00 |
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Staco 240V Variable Autotransformer 6020C $999.00 |
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Superior Electric Powerstat Variable Autotransformer $985.00 |
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Superior Ele. Powerstat Variable Autotransformer Type# 146T, Single Phase! $750.00 |
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Powerstat Variable Autotransformer Type# 146, Single Phase! $750.00 |
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STACO 5010C VARIAC 120VAC IN 0-140VAC OUT 7KVA 50A Variable Autotransformer NEW $749.99 |
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Staco 2520 Variable Autotransformer,240V 50/60HZ ABC310* $700.00 |
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Staco 5010 Variable Autotransformer, 120V 50/60HZ 50A, ABC311* $600.00 |
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Powerstat 236 B 236B Variable AutoTransformer Variac $584.16 |
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Superior Electric Staco 3PN226 Variable Autotransformer Variac DP124202 7303D $499.99 |
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General Radio 2-Gang Variac W20G2 0-140 VAC 40A GenRad Variable Autotransformer $499.95 |
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POWERSTAT VARIAC VARIABLE AUTOTRANSFORMER 115VAC INPUT 0-135VAC OUTPUT 1156-B $400.00 |
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POWERSTAT 126T VARIABLE AUTO TRANSFORMER – Untested $350.00 |
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POWERSTAT VARIABLE AUTOTRANSFORMER 1126-2S $325.00 |
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Staco Energy Products Variable Autotransformer 3PN1010 $300.00 |
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Superior Elec Powerstat 126 Variable Autotransformer $299.99 |
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Superior Powerstat variable autotransformer type 136bu, input 120v output 0-140v $299.99 |
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Staco Energy Products: 3PN1510 Variable Autotransformer. Tested Good. W $299.99 |
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Staco Energy Products Variable Auto Transformer 3PN1020B $275.00 |
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Powerstat 1156-B Variable Autotransformer Transformer $250.00 |
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STACO 1220 Variable autotransformer 240V, 60Hz, ABC172* $250.00 |
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Superior Powerstat Variable Autotransformer 236 2.5 KVA $250.00 |
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STACO 1020CT Variable autotransformer 240V 50/60HZ, ABC173* $250.00 |
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Superior Electric Powerstat Variable Auto Transformer Type 3TF236 Spec BP57502 $250.00 |
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STACO 3PN2210 3PN2210B VARIABLE AUTOTRANSFORMER 120 VAC VARIAC Hydrogen Cell pwr $249.99 |
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Superior Electric 216CT Powerstat Variable Autotransformer Staco Variac 7303B $249.99 |
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General Radio Co Variac 0-120V Variable Autotransformer Type W20 $249.99 |
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General Radio W20 Variac 120V Variable Autotransformer NOS No Brushes $200.00 |
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NEW AUTO TRANSFORMER VARIABLE AUTOTRANSFORMER 0-130V OUTPUT INPUT 100V VOLT 120V $200.00 |
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Genrad/Penril Technipower Variac W20M Variable Autotransformer 0-140V Load $199.99 |
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Powerstat Variable Autotransformer 116BU 1.4KVA $199.99 |
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Superior Electric Powerstat EMT4207P Motorized Variable Autotransformer Variac $199.95 |
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1 USED STACO TYPE 0333504 VARIABLE AUTO TRANSFORMER $169.99 |
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Staco Variac Energy Products Variable Autotransformer Type 3PN1010 $165.17 |
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TRANSFORMER SUPERIOR ELECTRIC 1 KVA POWERSTAT VARIABLE AUTO-TRANSFORMER $165.00 |
Variable Autotransformer Questions
Autotransformer
A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer’s coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer’s core, and thus a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF) or “voltage” in the secondary winding. This effect is called mutual induction.
A variety of types of electrical transformer are made for different purposes. Despite their design differences, the various types employ the same basic principle as discovered in 1831 by Michael Faraday.
The different types of transformers include power transformers, instrument transformers, pulse transformers, RF transformers, audio transformers, etc.
An autotransformer is an electrical transformer with only one winding. The auto- prefix refers to the single coil rather than any automatic mechanism. In an autotransformer a portion of the same winding acts as part of both the primary and secondary winding.
The winding has at least three taps where electrical connections are made. The voltage source and the electrical load are each both connected to two taps with one tap at the end of the winding being a common connection to both circuits. Each tap along the winding corresponds to a different source or load voltage.
Autotransformers are frequently used in power applications to interconnect systems operating at different voltage classes, for example 138 kV to 66 kV for transmission. Another application is in industry to adapt machinery built for 480 V supplies to operate on a 600 V supply. They are also often used for providing conversions between the two common domestic mains voltage bands in the world (100-130 and 200-250).
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