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PCT's ISO 9001, ISO 14001, and OHSAS 18001 certificates renewed
Pacific Crest Transformers is pleased to announce that its three key quality and environmental management certificates, ISO 9001, ISO 14001, and OHSA 18001, ...
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Resource Center
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Solar conversion systems, which had been lagging behind large scale wind farms in the renewable energy sweepstakes, are now coming on strong. Interest in transformers to be used for solar installations has quadrupled in the past year, now clearly outstripping wind farm equipment. Key reasons for the popularity include the fact that solar systems offer more constant loading, far less harmonics, ...
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Wind Turbine Step-up Transformers that boost turbine outputs from a few hundred volts to medium voltage distribution levels are failing at an alarming rate. This trend affects both liquid filled and dry type transformers. The purpose of this paper is to discuss the most likely causes of wind turbine step-up transformer failures experienced by developers ...
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Pacific Crest delivered a custom-built transformer solution that solved the client's problem, reduced costs,and resulted in lower line losses and higher efficiency.
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Our client designs and manufactures world class induction heating and melting equipment for various industries and applications ...
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Planning to invest in a wind Turbine Step-Up (WTSU) transformer, and concerned about its reliability? Listen to this podcast by Tom Steeber, VP Marketing and Sales, Pacificormers and learn how Wind Turbine Step-Up transformers can help increase your revenue and reduce costs.
The 5 minute podcast ...
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Blog
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Thursday - 24 Feb
Wind turbine transformers should be designed for the additional heating caused by harmonic loading and have an electrostatic shield between windings, neither of which are provided by conventional “off the shelf” transformer designs. Read on for more information on the role harmonics play in wind farm transformer design.
Harmonics Basics
Transformer design is based on the principal of creating a fluctuating magnetic field from a uniform sinusoidal input alternating voltage source to induce current flow in, and voltage potential across, an electrically separate conductor in that fluctuating field.
A purely uniform sinusoidal wave form is possible only theoretically. In real world transmission and distribution power systems, voltage and current waves get distorted from the ideal. In fact, total harmonic distortion (THD) of 1 to 2 percent is common at the point of generation. Also, non-linear loads such as switching actions, rotating machinery, variable frequency drives, and electronic devices of all types add further distortion to the ideal wave shape.
The cumulative distortions repeat every ...
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Wednesday - 23 Feb
The long cable runs and frequent switching operations found in multi-tower wind farms puts the wind turbine step-up transformer at greater risk than a conventional distribution or power transformer installations. Carefully locating the wind farm, along with using transformers with fault ride through capability, grounding transformers, surge arrestors, and properly rated transformer bushings, are among the strategies that can be used to counter the risks from switching surges and over-voltages at wind farms.
Locating Transformers at Wind Farms
The general rule of thumb for locating a transformer is to reduce the costs of large copper cables by placing the transformer in a manner that reduces the length of low voltage, high current cables. When this consideration is applied to wind farms, it follows that the wind generator and its associated transformer should be as close together as possible.
For land based sites, the turbine step-up transformer can either be located as near to the tower base as possible, or alternately, within the tower or nacelle. For off shore sites, the latter is the only realistic choice ...
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