Help with DC Motor Starters specifications:
Standard Rating
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| Rating Standard: | |||
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| NEMA Rated | Starter sizes refer to a standardized rating system for electrical performance. The NEMA size ratings are categorized by the continuous current rating and horsepower at the rated voltages. | ||
| IEC Rated | The IEC sizes are rated at the thermal current rating (the current the contactor can withstand without overheating) or the operational current (the capability of the contactor to make and break the current under different IEC Utilization Categories. eg. Utilization Category AC-1). | ||
| 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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| Device Technology: | |||
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| Solid State | The device uses solid-state technology. | ||
| Electromechanical | The device uses electromechanical technology. | ||
| 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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Environment
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| Operating Temperature: | This is the full required range of ambient operating temperature. | ||
| 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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NEMA Rated Starters
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| NEMA Rating: | Starter sizes refer to a standardized rating system for electrical performance. The NEMA size ratings are categorized by the continuous current rating and horsepower at the rated voltages. | ||
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| 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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IEC Rated Starters
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| IEC Rating: | The IEC sizes are rated at the thermal current rating (the current the contactor can withstand without overheating) or the operational current (the capability of the contactor to make and break the current under different IEC Utilization Categories. e.g. Utilization Category AC-1). | ||
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| 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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Starter Ratings
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| Continuous Current: | Continuous current is also called continuous ampere rating. Typically, a manufacturer will list the NEMA size and the Ampere Rating for that size. | ||
| 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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| Thermal Current: | IEC ratings are based on thermal current. | ||
| 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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| Motor Voltage: | |||
| 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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| DC Horsepower: | |||
| 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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Number of Poles
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| Number of Poles: | |||
| 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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Control Circuit Voltage
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| Control Voltage (Separate Control): | The control voltage, if different from the Motor Voltage. This is called "separate control" and means that the control circuit gets its power form a separate source, usually lower in voltage form the motor's power source. | ||
| 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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Motor Protection
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| Overload Protection: | |||
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| Eutectic | Eutectic overload relays consist of a eutectic (melting) alloy and a heater coil. When an overload occurs, the heater coil heats the eutectic alloy tube. The heat melts the alloy tube attached to tripping device, initiating a switching action. | ||
| Bimetallic | A bimetallic device is made of two strips of different metals that are permanently joined together. Heating the strip causes it to bend because the metals expand and contract at different rates. The strip is attached to a spring on a contact. As the strip bends, the spring pulls the contacts apart, breaking the circuit. | ||
| Solid State | The solid-state relay measures current or a change in resistance instead of generating heat to facilitate a trip. The solid-state relay also provides advanced functions (i.e. ambient temperature sensing, programmable trip time and detecting changes in current). | ||
| 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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| Low Voltage Protection? | If the line voltage drops or fails, the contactor will latch open and stop the motor. It must be manually reset to restart the motor. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Phase Failure (Loss) Trip? | If power fails is one wire of a polyphase circuit, power is interrupted in all the wires. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Phase Reversal (Unbalance) Trip? | If phase rotation reverses in a polyphase circuit, power is interrupted in all wires of the circuit. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Starter Type
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| Multi-speed Starter? | Multi-speed starters are designed to be operated at constant frequency and voltage. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Reduced Voltage Starter (RVS)? | Reduced voltage starters (RVS) use motor windings that may be reconnected to form different numbers of poles to change speed. It is designed to be operated at constant frequency and speed. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Reversing? | Reduce voltage starters are used when there is a need to avoid overloading the power distribution system (utilities impose limits on the amount pf power their customers may draw at any one time) or to avoid unnecessary wear and tear on equipment by reducing starting torque. The five main types of Reduced Voltage Starters are Primary Resistor, Autotransformer, Part Winding, Wye Delta and Solid State. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Full Voltage Non-reversing Starter? | Full-voltage non-reversing starters are designed with two contactors (one for forward direction and one for reverse) and an overload relay. The contactors are mechanically and electrically interlocked. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Manual Starter? | Manual starters are the most commonly used general purpose starter. These starters connect the incoming power directly to the motor and are particularly suitable for squirrel cage motors. They can be used in any application where the motor runs in only one direction, at one speed and where the draw of inrush current at start up is not a concern. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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DC Starter Specifications
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| Current-line Acceleration? | Current-line acceleration refers to mechanical linkages from the buttons or toggle force the contacts to open and close, starting and stopping the motor. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Time-limit Acceleration? | When the starting current is light the motor will accelerate rapidly. When it is heavy the motor will require more time to accelerate. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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