Autotransformer Combination Panels
Autotransformers are used to reduce the starting voltage on a motor. Once running, the motor receives full line voltage for normal operation. The combination panels listed in this section are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection. Please consult factory for submersible applications.
New Utility Transformers allow higher available Fault Currents. When advised, we can provide controls with proper interrupting ratings. Short Circuits may cause welding, which is not considered a failure of the Contactor. (see UL508, Para 53)
Autotransformer Combination panels include:
- NEMA 3R Enclosure;
- Main circuit breaker with lockable handle;
- 3 Magnetic Contactors;
- Transition timer;
- Motor starting autotransformer;
- Adjustable thermal overload protection;
- Reset pushbutton;
- Fused control circuit;
- Hand-Off-Auto selector switch with pushbutton (Start & Bypass);
- Terminal block for remote device.
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