The ultimate solution for flexibility, code compliance and
performance for protecting motor circuits The PowerPact® Electronic Motor Circuit Protectors (MCP) offer simple solutions that deliver more reliable start-ups, provide better protection for your equipment and adjust for a wide range of your motor starters. The unique design of the PowerPact MCPs includes two dials to allow a customer to quickly and confidently adjust settings based on the characteristics of the motor. The first dial allows for Full Load Amperes (FLA) adjustment across the range of the frame size, while the second dial selects the type of motor protection based on Automatic 1 for Standard Efficiency or Automatic 2 for High Energy Efficient. Dial 2 also allows for traditional motor protection from 8 to 13 times the selected FLA. These simple adjustments are all you need to ensure your motor circuit is set to the in-rush characteristics of the motor and is a fully National Electrical Code® (NEC®)-compliant installation. This new product has a number of significant advantages in managing your facility’s motorized equipment:
PowerPact More Reliable Start-ups of Your Equipment
Electronic MCPs Motor in-rush creates many problems for sizing and setting the circuit breaker in motor circuits. The high in-rush demands of energy-efficient motors can create nuisance tripping or installations that are not NEC compliant. The PowerPact MCP has instantaneous trip points that align with the motor and NEC to ensure your installation will work every time.
Easier Installations With a wide adjustment range, there is no need to swap devices to cover the horsepower range of a starter. For example, the 30A MCP has an FLA adjustment range of 1.5A to 27A, covering the entire range of NEMA size 00, 0 and 1 starters. The settings align directly with information published on the Settings for Standard or motor nameplate. Likewise, just five MCPs cover the complete range from Energy-Efficient Motors 1/2 hp to 200 hp at 480V. The automatic setting on the PowerPact MCP allows for a transient motor in-rush to safely High SCCR Ratings clear before aligning the protection to the The PowerPact MCP also helps achieve high Short Circuit Current Rating motor’s locked rotor current. Device settings (SCCR) needed to meet recent code changes for industrial control panels. align directly with the various classifications They deliver up to 100kA at 480V SCCR when used in combination with found on the motor nameplate. Square D® NEMA or Telemecanique® IEC motor starters. Better Equipment Protection and Safety The PowerPact MCP provides for quick and decisive tripping when your motor exceeds its current limitations, improving the longevity of your equipment. This eliminates a common misapplication that occurs when instantaneous trip points are adjusted too far above the motor’s locked rotor current to avoid nuisance tripping on high in-rush currents. The mechanism is also designed to ensure that the handle of the breaker provides positive indication that the contacts are in the ON, OFF or tripped position.
Lower Life Cycle Costs
This product delivers high performance levels and precise adjustment for a wide variety of motor circuits. It also eliminates the need to stock the wide variety of fuses required to keep your equipment running. Application of PowerPact® Electronic MCPs PowerPact® MCPs are magnetic only instantaneous-trip circuit breakers. They are designed to offer short circuit protection and meet NEC® requirements when installed as part of a UL listed combination controller having motor overload protection. MCP circuit breakers accept the same accessories and terminals as the equivalent PowerPact thermal-magnetic circuit breakers. Determine the horsepower rating from the nameplate of the motor. Select an MCP with an ampere rating recommended for the horsepower and voltage involved. When using the automatic settings, the MCP microprocessor automatically adjusts the trip setting for both current and time to align with the start-up characteristics for the motor type, whether it be standard or energy efficient. This includes a dampening means to accommodate a transient motor in-rush current without nuisance tripping of the circuit breaker.
Based on 2005 NEC table 430.52 Based on 2005 NEC table 430.250 Maximum Rating or Setting of MCP Selection by Horsepower Ratings of Induction Type Motor Protective Devices Squirrel-Cage and Wound Rotor Motors Three Phase 60 Hz AC Full Load Percentage of Full-Load Current Suffix Type of Motor 200V 230V 460V 575V Amperes Setting Not to Exceed^ 1/2 – 5 hp 1/2 – 7.5 hp 3/4 – 15 hp 1 – 20 hp 15 – 25 M71 A,B,C,D Standard 800% 1300% 5 – 10 5 – 15 10 – 30 15 – 40 14 – 42 M72 10 – 25 15 – 30 25 – 60 30 – 75 30 – 80 M73 Energy 20 – 40 25 – 50 50 – 100 60 – 125 58 – 130 M74 B,E 1100% 1700% Efficient 40 – 60 50 – 75 100 – 150 125 – 200 114 – 217 M75 ^ See NEC Exception No. 1 to table 430.52. Listed voltages are rated motor voltages. Corresponding system voltages are 200, 220 to 240, 440 The NEC 1300% maximum setting may be inadequate for to 480 and 550 to 600 volts. Select wire and circuit breakers on the basis of horsepower rather than instantaneous-trip circuit breakers to withstand current surges nameplate full-load current per NEC 430.6(A) for general motor applications. typical of the magnetization current of autotransformer type reduced voltage starters, or open transition wye-delta starters Per NEC 430.3, part-winding motors should select two circuit breakers, each at not more than one during transfer from “start” to “run,” constant horsepower multi- half the allowable trip setting for the horsepower rating. The two circuit breakers should be operated speed motors, and motors labeled “high efficiency.” simultaneously as a disconnecting means per NEC 430.103.
Short Circuit Current Ratings (SCCR) of PowerPact MCP Combinations
J Interruption L Interruption Contactor/Starter 200 – 240V 480V 600V 200 – 240V 480V 600V dc
See www.squared.com/ul508A for specific ratings and combination ID numbers.
Tested to meet NEC and UL 508A requirements for short circuit current ratings as part of an approved combination controller. National Electrical Code and NEC are registered trademarks of the National Fire Protection Association, Quincy, MA.
Schneider Electric - North American Operating Division
1415 South Roselle Road Palatine IL 60067 For more information on the Square D® PowerPact Tel: 847-397-2600 Fax: 847-925-7500 Electronic Motor Circuit Protector, contact your nearest www.us.squared.com Square D distributor or visit www.us.squared.com/mcp
