Devices & Controls
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Class 6121 and Class 6131 Mill Duty DC Crane Control Panels (PDF)
These mill duty DC crane control panels are used to operate DC series wound motors in both hoist and travel drive applications. This control meets AISE and NEMA standards, and have been developed and refined by EC&M over the last 100 years. These extremely rugged crane control panels use the Class 7004 Type M LINEARC© contactor, Class 7001 Type K relays, and Class 7001 Type ST1 acceleration relays. The controllers can be derated for use in ambients up to 60°C.
Class 6125 Mill Duty Digital DC Crane Control Panels (PDF)
These mill duty DC crane control panels are used to operate DC series wound motors in both hoist and travel drive applications. This control meets AISE and NEMA standards. The hoists have been developed and refined using the same dynamic lowering hoist principal developed by EC&M over 100 years ago. IGBT technology is used to increase performance flexibility, reduce routine contactor maintenance, and improve energy savings. The controllers are rated for use at 40°C, but can be derated to 60°C.
Class 6140/ 6440 /6820 Manual-Magnetic Crane Disconnect Switches (PDF)
These manual or magnetically operated disconnect switches meet OSHA requirements for crane main disconnects. The Class 6140 DC disconnects, the Class 6440 AC disconnects, and the Class 6820 Magnet disconnects all are based on the superior Type M, LINEARC® Contactors.
Class 6170 Youngstown® Power Limit Switches for AC and DC Cranes (PDF)
This OSHA-required switch limits crane hoist over-travel in the hoisting direction. It is operated by crane hoist hook block and directly interrupts the hoist motor current. EC&M created the first power limit switches used on cranes to help provide the highest level of crane safety. Youngstowns® feature an automatic gravity reset mechanism, sealed bearings, and right- or left-hand operating arms.
Class 6417/6418 ENDEAVOR™ AC Variable Frequency Control (PDF) – For use with AC squirrel cage or wound rotor induction motors in open or closed loop systems. This drive may be used for crane travel and hoist motions. May be used with AC solenoid or rectifier operated brakes, and with power and control circuit limit switches. Controls are rated for 50°C as standard. The ENDEAVOR™ AC drive system is suitable for new installations or for retrofit of existing electromechanical control.
Class 6715 TabWeld® Resistors (PDF)
These are time-proven, workhorse resistors, built to withstand the punishing effects of conductive dust, shock, vibration and other severe environmental conditions. Applications include motor starter, acceleration, and speed regulation resistances for crane and mill drives, mill duty adjustable frequency dynamic braking resistance generator load banks. Custom resistor sets can be designed to fit individual customer applications.
Class 6815 Type A Lifting Magnet Controllers (PDF)
Thses controllers are designed to handle the large inductive currents switched during magnet operations. The Type A Magnet Controllers are designed for 31-130 ampere, generator-powered magnets. Applications include crawler cranes, mobile cranes, locomotive cranes, and DC generator-powered overhead traveling cranes.
Class 6815 Type M Lifting Magnet Controllers (PDF)
Designed for 15-175 ampere magnets supplied by rectifier or generator power sources.
Class 7001 Type K DC Relays (PDF)
The Type K relay has been designed for service as a mill duty current-sensing or voltage-sensing relay. General purpose relay versions also are available.
Class 7004 Type M LINEARC® DC Contactors (PDF)
Thses are extremely rugged, mill duty DC contactors. Built of the highest-grade materials and tested to the toughest duty standards, Type M contactors feature the LINEARC® arc extinction method for the longest tip life and lowest maintenance. The Type M also features steel pan mounting and readily accessible power and control terminations.
Class 7135 and 7136 DC Reduced-Voltage Motor Starters (PDF)
Constant or adjustable-speed starters, reduced-voltage motor starters are used with shunt or compound-wound DC motors. They bring the motor up to speed in a set time, independent of load. Applications include turbine emergency lube oil pumps, machine tools, conveyors, pumps, and blowers.
Class 7145 and 7146 DC Reversing Reduced-Voltage Motor Starters (PDF)
These starters include benefits listed with the 7135 and 7136 starters (above) but allow for motor reversing. These starters are available with dynamic braking for minimum stopping times. Reversing starters can be used on machine tools and conveyors.
Class 8501 Type SZF Frequency Relays (PDF)
Frequency relays are recommended for use in AC wound rotor motor circuits to monitor motor rotor frequency for acceleration. Type SZF relays operate an output relay set to change state at a specific programmed frequency. It is user-programmable both for frequency set-points and for operation mode.
Class 8503 Type M LINEARC® AC Contactors (PDF)
AC version of our Class 7004 Type M contactor. Ideally suited to control AC mill motors, these contactors are designed especially for heavy industry AC drives, such as cranes and mill auxiliaries. Furnished with a DC operating coil, rectifier blocks are available to supply power for several contactors.
Class 9004 Master Switches (PDF)
Provide speed and direction-control inputs for mill duty control panels used on cranes or mill drives.
Class 9055 Magnetic Current Overload Relays (PDF)
Provide motor overload protection in severe mill environments. These electromechanical relays provide either time-delayed or instantaneous overload trip settings from 0.38 to 6,600 amperes.