Help with Toroidal Transformers specifications:
Primary Specifications
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| Primary Configuration | The size and cost of a transformer increases with the number of leads. A 5-lead primary requires more copper than a quad (2+2) primary. A ladder is the least economical primary configuration. | ||
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| Single | Single-phase transformers with single configuration have only one winding in the primary side and can accept only one nominal voltage. | ||
| Dual | Single-phase transformers with dual configuration have dual windings in the primary side and can accept two nominal voltages. This configuration helps to reduce fault current levels. A 2-lead voltage selector must be provided. | ||
| Quad (2+2) | Single-phase transformers that use the quad (2+2) configuration have dual windings in the primary side where each winding has a tap for accepting two nominal voltages. | ||
| 5-Lead | Single-phase transformers with 5-lead voltage selectors can accept five possible nominal voltages. The primary winding is arranged so that it can accept the 5 voltage ratings. | ||
| Ladder | The ladder configuration is a model used with multiple winding transformers. A ladder transformer consists of windings in a cascade and a series of inductances connected between adjacent windings. | ||
| Other | Other unlisted, specialized, or proprietary configuration. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Primary Frequency: | Frequency of incoming voltage signal to primaries. | ||
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| 50 Hz | The primary is rated only for 50 Hz. | ||
| 60 Hz | The primary is rated only for 60 Hz. | ||
| 50 / 60 Hz | The primary is rated for both 50 and 60 Hz. | ||
| 400 Hz | The primary is rated only for 400 Hz (aerospace). | ||
| Other | Other unlisted frequency option. | ||
| Search Logic: | Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Maximum Primary Voltage Rating | The maximum primary voltage rating is the input voltage range of the transformer. Transformers for use with several nominal voltages need more than one primary winding. Enter the maximum voltage required for the application. Matching products will list all primary voltages available in addition to the maximum specified. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Secondary Specifications
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| Maximum Secondary Voltage Rating | The maximum secondary voltage rating is the output voltage range of the transformer. A transformer may provide more than one secondary voltage. Enter the maximum voltage required for the application. The matching products will list all secondary voltages available in addition to the maximum specified. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Power Rating (VA) | The rated power of the transformer is the sum of the VA (volts x amps) for all of the secondary windings. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Operating Temperature: | Full required range of ambient operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Output Voltage | |||
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| AC | Alternating current (AC) waveform output voltage values are typically expressed as RMS values. Consult the manufacturer for waveform options. | ||
| DC | With direct current (DC) secondary voltage output, consult the manufacturer for the type of rectification. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Other Specifications
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| Mounting / Form Factor | |||
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| Chassis Mount | A chassis-mounted transformer has tabs to facilitate screwing it down. | ||
| Chip Transformer | Chip transformers have a form factor of an integrated circuit (IC) chip. They are typically manufactured using thin-film technology. | ||
| Dish / Disk Mount | A simple rubber washer and metal disk or dish secures the transformer to the chassis or board. There is usually a through-hole in the middle of the disk that allows for a screw to hold the transformer down. | ||
| H-Frame | H-frame mounting is used in applications where high vibration or shock is present. It is an "H" shaped frame that the transformer sits on. The frame is secured to the chassis or board. | ||
| Modular Jack | Magnetics incorporated into the RJ-45 form factor ensure high common mode noise immunity, while maintaining signal integrity. | ||
| Pad-Mounted | Pad-mounted transformers are mounted on the ground, sitting on a concrete (or other material) pad. They are normally step-down transformers used in power distribution systems to step down the voltage from the high voltage terminals of an underground distribution system to the low voltage of the end user’s needs. | ||
| PC / PCB Mount | Any of a variety of signal transformers mounted on PCBs. They can either be surface-mounted or through-hole configurations, using the soldering method to hold the transformers. PC-mount transformers offer a small footprint for the design engineer looking to measure sensor current or voltage on a computer board. Some applications for PC or PCB transformers include sensing current overload, ground fault detection, metering, isolated current feed-back signal in switch mode power supplies, motor current load / overload, lighting, switch controls, ultra-sound current, high resolution sonar current, and isolated bi-directional current sensor with full wave bridge. | ||
| Other | Other unlisted, specialized, or proprietary transformer mounting techniques. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Standards / Compliance | |||
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| RoHS Compliant | Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether. RoHS became effective on July 1, 2006. | ||
| ANSI | American National Standards Institute (ANSI) does not itself develop American National Standards, but it facilitates standards development by establishing consensus among qualified groups. | ||
| CSA | Canadian Standards Association (CSA) establishes standards of safety for products and helps preserve the environment. CSA tests and certifies products for national in international companies. | ||
| IEC | International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. | ||
| MIL-STD | The transformer satisfies U.S. military standards or specifications (MIL-SPEC). There are many testing standards associated with MIL standards. | ||
| UL | Underwriters Laboratories Inc. (UL) is an independent, not-for-profit product safety testing and certification organization. | ||
| TUV | TÜV Rhineland Berlin-Brandenburg appraises tests and certifies technical equipment and products according to international quality standards, and then registers those in compliance. | ||
| VDE | The Germany-based VDE Testing & Certification Institute is accredited on a national and international level in the area of testing electrotechnical products. Testing is conducted for safety, electromagnetic compatibility, and other characteristics. | ||
| WEEE Compliant | Waste Electrical and Electronics Equipment (WEE) is a European Union (EU) Directive that aims to encourage the reuse, recycling, and recovery of electrical and electronic equipment, and to improve the environmental impact and performance of this equipment. WEEE establishes the requirements and criteria for the collection, treatment, recycling, and recovery of this equipment. It makes producers responsible for financing these activities, and retailers and distributors must provide means for consumers to return used or obsolete equipment without charge. | ||
| Other | Any other agency that that tests or certifies electrical, electronic, or electrotechnical products. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Features | |||
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| Waterproof | The transformer has a waterproof case. | ||
| NEMA Enclosure | The transformer's enclosure satisfies NEMA standards. | ||
| Outdoor Use | The transformer can be used outdoors. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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