Motor Control Panels
This section describes Selectric’s standard motor control packages. These panels are designed to start, operate and control a single motor for use in an agricultural or industrial application. All of the standard control panels are UL listed and contain IEC or NEMA rated components.
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)
Full Starting Voltage Panels
Full starting voltage panels are motor control panels that use full rated voltage to start and maintain operation of the motor. These controls are suitable for applications in which the electrical service supplying the motor is sufficient in size to accommodate the starting current of the motor. Panel types under this category are: Magnetic Starters, Across the Line Combination Starters (circuit breaker type), and Across the Line Combination Starters (fusible type).
Reduced Starting Voltage Panels
Reduced starting voltage panels utilize various methods to reduce the magnitude of the current required to start a motor. These controls are used in applications where the electrical service supplying the motor is not sufficient in size to start the motor without a significant voltage “sag”, but the service is adequate to maintain a running motor. Panel types under this category are: Partwind (circuit breaker or fusible types), Autotransformer (combination or non-combination types), Star-Delta, and Solid State.
Variable Speed Motor Panels
Variable speed controls are used in applications where the speed of a motor must be continuously controlled. Many processes require this kind of flexibility. Variable speed controllers offer an additional advantage in that they can also reduce the starting current of a motor over that of an Across the Line panel.
Enclosure Dimensions
The dimensions listed are approximate. Certain conditions and/or options preclude the use of a specific enclosure for a given job. Underlined lettering indicates the manufacturer’s nominal dimensions for a given enclosure.
Magnetic Starters
Magnetic starter panels are used to start motors across-the-line in applications where a main disconnect is installed as a separate piece of equipment not supplied by Selectric. Please consult factory for submersible applications.
IEC Across the Line Combination Controllers (Circuit Breaker Type)
Across-the-Line combination controllers are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection. Please consult factory for submersible applications.
NEMA Across the Line Combination Controllers (Circuit Breaker Type)
NEMA Across-the-Line combination controllers are complete motor control packages used in Heavy Duty applications requiring a disconnecting means, starting circuitry, and motor overload protection. Please consult factory for submersible applications.
IEC Across the Line Combination Controllers (Fusible Type)
Across the Line combination controllers are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection. Please consult factory for submersible applications.
NEMA Across the Line (Fusible Type), Programmable Overload
Across the Line combination controllers are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection. The programmable overload provides the following protection: adjustable trip class from 5 to 30, low voltage, high voltage, voltage unbalance, over current, under current, current unbalance, ground fault current, rapid cycle timer, motor cool-down timer, dry well recovery timer. Please consult factory for submersible applications.
Partwinding Panels (Circuit Breaker Type)
Partwinding panels are used with specially designed motors. These panels are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection. Please consult factory for submersible applications.
Partwinding Panels (Fusible Type)
Partwinding panels are used with specially designed motors. These panels are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection. Please consult factory for submersible applications.
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.
Reduced Voltage Star-Delta Panels
Star-Delta panels are used with specially designed motors. These panels are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection. Please consult factory for submersible applications.
Solid State Reduced Voltage Panels (Soft Start)
Solid state starters are a popular choice for applications requiring programmable reduced voltage starting. Soft start panels are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, and motor overload protection.
Variable Speed Drive Panels (Variable Torque)
A variable speed drive (VSD) is required for applications needing programmable motor running speed. VSD panels are complete motor control packages used in applications requiring a disconnecting means, starting circuitry, VSD and motor overload protection. These VSD panels are medium duty (Variable Torque) configurations.
Pivot Disconnect Panel
Center pivot disconnects are used to control the operation of a center pivot sprinkler system from a location on the field’s edge. This configuration allows the irrigator to control the pivot without having to make a trip to the center of the field.
Simplex Control Panels
A simplex level control panel is the right choice for non-critical level control where a single pump or motor is utilized to drain or fill a process. In a “two float” configuration, the motor starts when one remote contact, a float switch for example, closes and the motor stops when the other remote contact opens. A “three float” configuration provides the same operating sequence, but a third remote contact is used as a high level or a low level alarm.
Duplex Control Panels
In a duplex control panel, two motors are used to drain or fill the process adding a level of reliability and easier maintenance. Duplex panels can be configured in a two, three or four “float” configuration. With two remote contacts (floats), only one motor runs at any given time (there is no “lag” operation). With three remote contacts, the motors are operated in a lead-lag mode. With four remote contacts, the motors are in lead-lag mode with an alarm output.
Fused Disconnect Switch
Fused disconnect switches are UL listed and suitable for use as service entrance equipment.
Auto Vacuum Prime System
Selectric introduces a dependable vacuum priming system for centrifugal pumps.
Power Factor Correction Capacitors
Capacitors are sized in accordance with industry standards but are listed in horsepower for ease of selection. Units will correct standard 3-Phase 3600 RPM and 1800 RPM motors to approximately 95% power factor. To correct to approximately 97% power factor, use the next sized larger unit. For 1200 RPM motors, use the next larger panel size. These and all Selectric products should only be installed by qualified personnel in accordance with applicable electrical codes.
Options and Accessories
Click here to download our latest list of Options and Accessories
Replacement Parts
Please call us with any questions regarding replacement parts. This website only lists a few products we stock.
Drawings and Dimensions
Consult Selectric for more information on Drawings and Dimensions.
