Geni Swing Guitars

Output Transformer

Transformer based MIG Welders often use SCR's (Silicon Controlled Rectifier) as the means of controlling the weld output current. An electronic circuit determines when, and for how long current is allowed to flow to the weld output terminals. This is accomplished by triggering the SCR's with a PWM (Pulse Width Modulation) gating signal. The SCR's are switched on during the positive half cycle of the secondary voltage that is produced by the Main transformer assembly. This occurs at a 50 or 60Hz rate for a single phase Mains Input operated Welder. When the Welder is used with a three phase input supply the Sine wave cuts the Transformer primary winding three times as often. A well designed SCR based Welder will take advantage of this to effectively increase the DC switching rate.

The application of the Gating signal turns the SCR on for a period of time leading up to the zero crossing point of the incoming Sine Wave. At the Zero Crossing Point, the SCR turns off. Due to this, it is imperative that the firing or timing of the SCR's is synchronous with the incoming Supply voltage. The longer the waveforms 'on time', the greater the Weld output current. In other words, to achieve a greater Weld output current, the duty cycle ('On time' verses 'Off time') of the PWM gating signal must be increased.

Having said this it is also important to note that most Welders of this type will have a large Inductor (or Reactor) after the SCR switching circuit. The inductor provides energy to the Welding Arc during the time that the SCR's are switched off.

High current SCR's are usually packaged in a Stud Mount or Press-Pak (Hockey Puck) configuration. Stud Mounted SCR's are bolted directly into sheet metal work, which constitutes its Heatsink assembly. Hockey puck devices are mounted between two compression plates (this constitutes its Heatsink assembly). Hockey puck SCR's must be compressed in order to operate. This is an internal safety feature that helps ensure good contact with the Heatsink, and avoids thermal conductivity issues. Thermal Issues account for a large percentage of SCR failures. This can be attributed to poor mechanical connections to the Heatsink assembly and inefficient cooling arrangements. Factors to consider are: Cooling Fan operation, the use of Thermal Conductivity Pads/ Heatsink compound between SCR and Heatsink, and Torque settings for Hockey Puck devices. High Weld output currents amplify any problems in these areas.

Other SCR failures can be attributed to the occurrence of ESD events (Electro-Static Discharge) and EOS (Electrical Over Stress). Also, insufficient voltage snubbing due to degraded components in the Snubber network is another factor for consideration

David Willcocks is an Electronics professional, and Technical writer. For more information on Automated Test Equipment please visit http://www.imagineATE.com.

Sst150e Electronic Transformer Input: 120v Output: 150w $97.9 Input: 120V / Output: 12V 150W. Surface mount transformer with integral on/off switch. Dimensions: 7"L X 2"W X 1 1/2"H.

Sst60e Electronic Transformer Input : 120v Output: 60w $65.9 Input: 120V / Output: 12V 60W. Surface mount transformer with integral on/off switch. Dimensions: 5"L X 1 5/8"W X 1"H.

Isolation Transformer IS1000HG - transformer - 1000 Watt $419.99 Tripp Lite Isolation Transformer IS1000HG - Transformer - AC 120 V - 1000 Watt - 4 output connector(s)

Isolation Transformer IS250HG - transformer - 250 Watt $204.99 Tripp Lite Isolation Transformer IS250HG - Transformer - AC 120 V - 250 Watt - 2 output connector(s)

5A DC 24V Input to 12V Output Power Converter Transformer $18.49 Description:With this DC Transformer, you can transform a high input voltage into a low output voltage with output current of 5A.It uses an imported voltage stabilizing module for switching power supply with an input DC voltage of 24V and an output DC voltage if 12V and automatic protection against over current voltage overheat and short circuit.The Power Transformer allows you to charge a 12 volt items from a 24 volt system.Casing Material of this 5A Transformer: AlloyInput DC Voltavge: DC 24VOutput DC Voltavge: DC 12VRated Output Current: 5ADimension: ~10.6(L) x 9(W) x 4(H)cmWeight: 379gPackage Included:1 x DC 24V to 12V Transformer

Step-Down Transformer transformer - 5000 VA $566.99 APC Step-Down Transformer - Transformer ( rack-mountable ) - AC 208 V - 5000 VA - 4 output connector(s) - 2U - for P/N: SUA5000RMI5U

Transformer $6.49 Transformer

The Transformer $7.49 The Transformer

Hosa Technology Impedance Transformer $18.99 Before your next show, connect your microphone to a hi-Z input with this impedance transformer, which matches 200R output impedance to 50K input impedance.

APC AP9627 Step-Down Transformer Transformer - 5000 VA. Each $591.51 Manufacturer: APC. Each. The Step-Down Transformer converts high voltage (208 VAC) output into low voltage (120 VAC) output for powering low voltage AC equipment. Product Description: APC Step-Down Transformer transformer - 5000 VA Device Type: Transforme

T-60 Plug-In Transformer $75 The T-60 Plug-in Transformer is an electronic transformer, that uses a standard wall outlet. 10 feet of cable is provided for the output. Technical Specifications: 60VA maximum (20VA minimum) 120V AC, 50/60Hz input Short circuit, overload, and thermal protection

T Remote Transformer- T-300/277v $450 The T REMOTE MAGNETIC TRANSFORMERS are equipped with a circuit breaker in the metal housing. Multi-taps supply higher output voltage and compensate for voltage drop when used with a dimmer or remote transformer distances. Please contact manufacturer for further details. The T REMOTE MAGNETIC TRANSFORMER fulfills stringent product safety standard requirements. Transformer must be installed in a well ventilated location to allow heat dissipation. Matte chrome. 300W, 277V

Sytf4 - Apc - Symmetra Rm 5Kva Step-Down Transformer With Hardwire Input/Output - Step Down Transformer - 5Kva - 220V Ac - 120V Ac $611.91 symmetra Rm 5kva Step-down Transformer With Hardwire Input/output Converts High Voltage Output Into Low Voltage Output For Powering Low Voltage Ac Equipment. This Product Has Rack Based Design And Fit Into Any Standard 19 inch Rack. The Product Design Is Consistent With Other Apc Products, So You Can Be Assured Of Consistent Look And Feel. This Is Only 2u In Height And Deliver Up To 4.5 Kw To Your Load. This Is Designed To Work With The Apc Symmetra And Smart-ups 208v Products. [841415] UPC: 731304203483 UNSPC: 39121002 24L x 17.5W x 3.5H 95 LB

300W Recessed Remote Transformer $515 This remote magnetic transformer converts standard 120 or 277 volt line voltage to 12/24 volts, providing the necessary voltage for powering MonoRail, Kable Lite, Wall MonoRail or FreeJack low-voltage lighting systems. This transformer can be used to power lamps totaling up to 300 watts and is equipped with fast-acting secondary circuit breaker that will safely turn off the system should a short occur. Once the short has been removed the breaker can be reset. Compatible with Tech Lighting's LED elements. This transformer provides a single 300 watt output and must be used with a single-feed canopy or other power feed option (sold separately).

600W Recessed Remote Transformer $690 This remote magnetic transformer converts standard 120 or 277 volt line voltage to 24 volts, providing the necessary voltage for powering MonoRail, Kable Lite, Wall MonoRail or FreeJack low-voltage lighting systems. This transformer can be used to power lamps totaling up to 600 watts and is equipped with fast-acting secondary circuit breaker that will safely turn off the system should a short occur. Once the short has been removed the breaker can be reset. This transformer provides a single 600 watt output and must be used with a single-feed canopy or other power feed option (sold separately).

T Remote Transformer- T-150/120v $330 The T-150 series magnetic remote transformer features a metal enclosure with a covered wiring compartment. The core and coil are encapsulated for reliability and quiet operation. Boost tap with circuit breaker included in the housing. Technical Specifications: Transformer must be installed in a well ventilated location to allow heat dissipation. 150VA maximum 120V AC, 60Hz 12V AC output 15A circuit breaker on secondary 3 X .5" electrical connect knockouts

T Remote Transformer- T-300/120v $375 The T-300 series magnetic remote transformer features a metal enclosure with a covered wiring compartment. The additional boost tap output can be used to counter voltage drop do to longer powerfeeds. The core and coil are encapsulated for reliability and quiet operation. Technical Specifications: Transformer must be installed in a well ventilated location to allow heat dissipation. 300VA maximum 120V AC, 60Hz 12V/12.6V(boost tap) AC output Auto thermo shutoff (resttable) on primary 25A switch circuit breaker on secondary 5 X .5" electrical connect knockouts

T Remote Transformer- T-600/120v $525 The T-600 series magnetic remote transformer features a metal enclosure with a covered wiring compartment. Two 300VA circuits in a single case for a smaller footprint than two T-300's. The additional boost tap output can be used to counter voltage drop do to longer powerfeeds. The core and coil are encapsulated for reliability and quiet operation. Technical Specifications: Transformer must be installed in a well ventilated location to allow heat dissipation. 2 X 300VA maximum 120V AC, 60Hz input 12V/12.6V (boost tap) AC output Single primary feed for both circuits (not independently switchable) Auto thermo shutoff (resettable) on primary 2 X 25A switch circuit breaker on secondary 7 X .5" electrical connect knockouts

T Remote Transformer- T-600/277v $615 The T-600 series magnetic remote transformer features a metal enclosure with a covered wiring compartment. Two 300VA circuits in a single case for a smaller footprint than two T-300's. The additional boost tap output can be used to counter voltage drop do to longer powerfeeds. The core and coil are encapsulated for reliability and quiet operation. Technical Specifications: Transformer must be installed in a well ventilated location to allow heat dissipation. 2 X 300VA maximum 277V AC, 60Hz input 12V/12.6V (boost tap) AC output Single primary feed for both circuits (not independently switchable) Auto thermo shutoff (resettable) on primary 2 X 25A switch circuit breaker on secondary 7 X .5" electrical connect knockouts

Ultra-Slim Premium Electronic Transformer $115 With a height of only 0.5", the Ultra-Slim Premium Electronic Transformer is the preferred choice for even the tightest areas. Features: Input Voltage: 120V. Output Voltage: 12V. Maximum Output: 60W. Short Circuit Overload Protection. Dimmable with Standard Incandescent Dimmer. Includes 79" plug-in power cord. Auto reset technology - no fuses.

Compact Ecoline Electronic Transformer $74.89 Utilizing the latest SMD technology comes the Compact Ecoline Electronic Transformer from American Fluorescent. Features: Input Voltage: 120V. Output Voltage: 12. Maximum Wattage: 60W. Short Circuit, Overload and Overheat protection. Soft start for maximum lamp life. Dimmable with a Standard Incandescent Dimmer. Provides 79" plug-in power cord.

Markbass Super Di Transformer $199.99 Now it's possible to upgrade the DI output of any Little Mark head (including the discontinued Little Mark II). The Markbass SUPER DI Transformer is optimized to give pure, full, rich, linear sound at all frequencies, handling extreme transients without introducing any distortion or coloration. It's like putting a SUPER PRO DI BOX inside your amp! The modification is very simple and can be performed by any authorized Markbass service center.

Hosa MIT156 LineMatching Transformer $31.19 This adaptor is designed to match 600R output impedance to 2.5K input impedance. It may be used to connect a microphone to a portable recording device camcorder or PC. Maximizes signal fidelity when using impedance mismatched gear. Minimizes high frequency and level loss caused by signal reflections. Eliminates noise and hum caused by an impedance mismatch. Connector: XLR3F to 3.5 mm TRS. Impedance Transformer: XLR3F to 3.5 mm TRS. Length: 18 .

Smart-UPS RT 5000 - transformer - 5000 VA $689.99 APC Smart-UPS RT 5000 - Transformer - AC 230 V - 5000 VA - 3 output connector(s) - 3U - 19"

Aquatec TACS11448 8800 Series 120 Volt Transformer $51.18 Transformer model MECA9051 for Aquatec 8800 Series High Flow Booster Pump. Input: 115V 60Hz 53 watts. Output: AC 24v 2 amp.

APC AP9626 30A Step-Down Transformer $503.99 Input: 208V Output Voltage: 120V AC Features: Step down transformer placed upstream of the UPS to avoid inrush current and saturation eliminating need to oversize transformer APC Step-Down Transformer , Input: 208V , Input Connections: NEMA L6-30P , Output: 120V , Output Connections: NEMA 5-20R Parts: 1 year limited Labor: 1 year limited

Smart-UPS RT Tower Isolation/Step-Down Transformer - transformer - 4600 VA $745.99 APC Smart-UPS RT Tower Isolation/Step-Down Transformer - Transformer - AC 200 V - 4600 VA - 12 output connector(s) - for P/N: SU2200RMXLTNET SUA3000RMT2U SUA5000RMI5U SURT7

EN-B24PZ-AR Electronic Transformer 24V 300W $129.9 The EN-B24PZ-AR 24V 300W Low Voltage Electronic Transformer from WAC Lighting is designed to be used as an enclosed remote transformer. In the case of a system overload or short circuit the transformer will revert to a "hold" position and then automatically reset the system when the problem is solved. System protection is designed to last several hours. Features: Input Voltage: 120V. Output Voltage: 24V Minimum load: 100W, Maximum load: 300W. Enclosure has separate compartments for transformer, line and low voltage wiring. Transformer may be safely loaded to 10037; of stated capacity. Built-in auto reset, soft start, short and overload circuit protection features. Soft start delayed start extends lamp life. Dimmable with Low Voltage Electronic Dimmer.

EN-B12PY-AR Electronic Transformer 12V 250W $127.9 The EN-B12PY-AR 12V 250W Low Voltage Electronic Transformer from WAC Lighting is designed to be used as an enclosed remote transformer. In the case of a system overload or short circuit the transformer will revert to a "hold" position and then automatically reset the system when the problem is solved. System protection is designed to last several hours. Features: Input Voltage: 120V. Output Voltage: 12V Minimum load: 100W, Maximum load: 250W. Enclosure has separate compartments for transformer, line and low voltage wiring. Transformer may be safely loaded to 10037; of stated capacity. Built-in auto reset, soft start, short and overload circuit protection features. Soft start delayed start extends lamp life. Dimmable with Low Voltage Electronic Dimmer.

Tc2 Electronic Transformer- Tc2-150/120v $285 The TC2-150 Electronic Transformer comes with multiple secondary outputs and integrated circuit breaker. Complete wiring diagrams and installation instructions are included with all transformers. Recommended for distances less than 10 feet from canopy. Technical Specifications: 3 X 60VA maximum (10VA minimum, 20VA dimming) 120V AC, 50/60Hz 11.7V AC output Class II rated Short circuit, overload, and thermal protection 5 X .5" electrical connect knockouts Remote power feed up to 10 feet (18 gauge wire)

Tc2 Electronic Transformer- Tc2-300/120v $375 The TC2-300 Electronic Transformer comes with multiple secondary outputs and integrated circuit breaker. Complete wiring diagrams and installation instructions are included with all transformers. Recommended for distances less than 10 feet from canopy. Technical Specifications: 6 X 60VA maximum (10VA minimum, 20VA dimming) 120V AC, 50/60Hz 11.7V AC output Class II rated Short circuit, overload, and thermal protection 7 X .5" electrical connect knockouts Remote power feed up to 10 feet (18 gauge wire)

Tq Remote Transformer- Tq-150/120v $885 The TQ-150 series magnetic remote transformer features a metal enclosure with a covered wiring compartment, which can be be surface mounted or recessed in a wall. The additional tap outputs can be used to counter voltage drop do to longer power feeds. A toroidal coil is used for reliability and efficient operation. Optional debuzzing choke (TCK-300) is available for dimming applications, sold separately. Technical Specifications: 120V AC, 60Hz input 11/12/13/14/15V AC output Auto thermo shutoff (resettable) and switch circuit breaker on primary 15A switch circuit breaker on secondary 25 X .5" electrical connect knockouts

Tq Remote Transformer- Tq-300/120v $1131 The TQ-300 series magnetic remote transformer features a metal enclosure with a covered wiring compartment, which can be surface mounted or recessed in a wall. It can be equipped with optional debuzzing choke (TCK-300) for dimming application. The additional tap outputs can be used to counter voltage drop do to longer power feeds. A toroidal coil is used for reliability and efficient operation. Technical Specifications: 300VA maximum 120V AC, 60Hz input 11/12/13/14/15V AC output Auto thermo shutoff (resettable) and switch circuit breaker on primary 25A switch circuit breaker on secondary 25 X .5" electrical connect knockouts

Tq Remote Transformer- Tq-300/277v $1200 The TQ-300 series magnetic remote transformer features a metal enclosure with a covered wiring compartment, which can be surface mounted or recessed in a wall. It can be equipped with optional debuzzing choke (TCK-300) for dimming application. The additional tap outputs can be used to counter voltage drop do to longer power feeds. A toroidal coil is used for reliability and efficient operation. Technical Specifications: 300VA maximum 277V AC, 60Hz input 11/12/13/14/15V AC output Auto thermo shutoff (resettable) and switch circuit breaker on primary 25A switch circuit breaker on secondary 25 X .5" electrical connect knockouts

Enzis 300W Direct Feed Transformer $432 The 300W electronic Enzis transformer can be mounted over a standard 4" junction box to supply a maximum of 300 watts. The Enzis 300W Direct Feed Transformer is for use with the Enzis system only. Technical Specifications: 300VA maximum (50VA minimum) 120V AC, 50/60Hz input 11.7V AC output Suitable for dry locations only Short circuit, overload and thermal protection

Enzis 150W Direct Feed Transformer $315 The 150W electronic Enzis transformer can be mounted over a standard 4" junction box to supply a maximum of 150 watts. The Enzis 150W Direct Feed Transformer is for use with the Enzis system only. Technical Specifications: 150VA maximum (20VA minimum) 120V AC, 50/60Hz input 11.7V AC output Suitable for dry locations only Short circuit, overload and thermal protection