Osborne Transformer Corp.
Osborne Transformer’s name is known by groups of professional electrical engineers. Why? Perhaps it´s because they have been overexposed to high voltage – or maybe they’re confusing our transformers with plastic toys (and movies) for kids. We can’t figure it out… fortunately other areas of industry keep us busy in the meantime.
- (800)229-9410
(586)468-9410 - (586)468-4828
- sales@osbornetransformer.com
- 33258 Groesbeck Highway
Fraser, MI 48026
United States
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Current Transformers
The Institute of Electrical and Electronic Engineers defines a current transformer (IEEE Std C57.13) as “a transformer intended to reproduce in its secondary circuit, in a definite and known proportion, the current of its primary circuit with the phase relations substantially preserved”. Its primary winding is connected in series with the conductor carrying the current to be measured or to be controlled and its secondary winding is connected to the measuring, protection or control devices. Osborne designs and manufactures current transformers which are used for instrumentation applications, others which are used for power system synchronizing applications and others which are used in protection circuit application. They have been designed to meet specified current ratios, burden impedance and transformation errors.
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EMC Testing Inductors
Electromagnetic Compatibility (EMC) testing is a somewhat unique discipline within the world of electrical product development and analysis. Electromagnetic Compatibility (EMC) testing is primarily concerned with understanding and mitigating the affects of Electromagnetic Interference (EMI).
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Potential Transformers
Osborne Potential Transformers (PT’s) are used to reduce higher system voltages to lower values that are appropriate for instrumentation and/or protection circuits. They have been designed to meet specified current ratios, and burden impedance at a specified transformation error. One area of unique Osborne expertise is in designing for phase shift when potential transformers are to be used for power measuring applications.
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Auxiliary Potential Transformers
Osborne Auxiliary Potential Transformers (Aux PT’s) are used in utility and commercial industrial power systems. Osborne works with our clients to identify the safety advantages of using auxiliary potential transformers (Aux PT’s) to establish protection schemes for high voltage equipment. Aux PT’s step the voltage down to safer levels, normally below 600 V AC.
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Isolation Transformers
Osborne’s Isolation Transformers are used to step-up, step-down and isolate voltages in single phase circuits. Isolation may be used to provide output circuit immunity from voltage spikes and noise (both common-mode and transverse-mode) present on the input system. The isolation can allow separate grounds on both the input and output sides of the transformer. Osborne also designs with a range of electrostatic shielding to provide several levels of noise immunity.
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Filament Transformers
Osborne designs and produces high impedance and unregulated Filament Transformers. An unregulated filament transformer supplies a specified voltage and current to the filament of an electron vacuum tube. High impedance filament transformers are designed around a tungsten tube filament. Osborne often works with our clients to increase the life-span of their vacuum tubes through the use of a regulated voltage supply.
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Saturable Reactor Inductors
Osborne Saturable Reactors are designed to provide a variable output voltage through the use of variable impedance connected in series with a constant impedance load. Each saturable reactor’s impedance is determined by the application of DC power to a control winding. As the level of power supplied to the control winding is increased, the saturable reactor becomes more saturated. This reduces the impedance of the AC gate winding, and increase the amount of the supply voltage that is transferred to the load. Conversely, as the power is reduced to the control winding, the reactor becomes less saturated, the gate winding has more impedance and less of the input voltage is provided to the output impedance. This approach provides excellent quality, reliability, and control when designed to match the requirements of a specific application.
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Air Core Inductors
Osborne designs our Air Core Inductors to realize their advantage of high linearity. We also work with our clients to identify and mitigate any potential disturbances that could result from electromagnetic fields created. The air core design approach is known to create strong electromagneticfields. Osborne develops electromagnetic circuit models, if necessary, to ensure that our clients build effective and reliable circuits.
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Auxiliary Current Transformers
Osborne Auxiliary Current Transformers are often used to reduce system currents to lower values appropriate for instrumentation and/or protection circuits. The Aux CT’s are designed for specific current ratios and burden impedance with a known transformation error. Osborne’s units are built for high performance and longevity in the most demanding environments.
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Rectifier Transformers
Osborne’s Rectifier Transformers are used in conjunction with various rectification configurations to convert AC input to DC output(s). Key characteristics include regulation, transformer utilization and AC ripple. Osborne rectifier transformer designs are often engineered to operate in advanced rectifier circuit applications.
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Harmonic Trap Inductors
Osborne designs harmonic trap inductors to work in conjunction with capacitors in power systems to prevent specific line-frequency harmonics from flowing back to the power source (point of common connection). This power quality design approach prevents harmonic currents from flowing to the main facility power system and/or to the utility power system. The Osborne system also reduces unnecessary power losses and power-system pollution.
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DC Load Simulating Inductors
Osborne has developed a wide range of DC load simulation inductors that are known for the transients they produce. Osborne DC load simulation inductors are unique and innovative because they are engineered to produce a precise time constant current transient during the current charge cycle.Another distinguishing feature of our load simulation inductors is that they produce a precise voltage transient during the current discharge cycle. The resulting test circuit can be used to accurately replace real loads in a variety of circuit simulation applications.
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High Frequency Current Transformers
Osborne High Frequency Current Transformers operate at frequencies higher than 50/60 Hertz. Their purpose is to reduce high frequency system currents to lower values that are appropriate for instrumentation and/or protection circuits. They have been designed to meet specified current ratios, and burden impedance at a specified transformation error. One area of unique Osborne expertise is in designing for phase shift when high frequency current transformers are to be used for power measuring applications.
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AC Load Simulating Inductors
Osborne designs our AC Inductors to provide the desired inductance and to perform effectively with the dissipation characteristics presented to the circuit. Dissipation characteristics depend on circuit current and operating frequency. The Osborne design approach is unique to the extent that we design for frequency effects. The resulting inductors deliver superior performance.
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DC Filter Inductors
Osborne DC filter inductors (aka filter chokes) are commonly used in AC to DC conversion circuits to present an inductive voltage drop to the AC component of rectified current. This inductive voltage drop acts as a filter. Osborne designs filter inductors to components to function effectively (without saturation) in the presence of the DC current. Osborne will work with you to mitigate the impact of ripple frequency in conversion circuits. Every Osborne DC filter choke is designed for high performance with special consideration given to your circuit´s power supply frequency and conversion configuration.
