It is commonly used with systems powered by traditional diode-bridge DC bus supply rectifiers or diesel-driven DC generators. The unit prevents overhauling or
2015年12月16日 — Control systems are an essential part of an overhead crane or hoist DC cranes to modern, safe, and effective controls is to convert cranes to need to manually control the crane on catwalks or over boiling metal, etc.
Control braking is dynamic lowering, countertorque or eddy current load brake. crane bridge and trolley. The dc motors are intermittent duty, rated one hour or 1/2 With Mechanical. Load Brake. Handling. Hot Metal. Not Handling. Hot Metal.
maintenance of overhead cranes powered by DC motors. Two large prints are provided, as well as an answer key for effective study of the principles involved.
DC crane control panels are motor controllers that provide multi-speed control Reversing plugging control for bridge and trolley drives All three standards require that a hoist drive handling hot metal be equipped with more than one brake.
control the speed and direction of the crane motors driving the gantry, trolley, boom, cable Earlier crane systems used DC drives and motors, but most regions of the world are now in the harsh environment of a metal rolling mill. Example of
brake or DC dynamic lowering controls providing two independent braking means movable structures. Bridge brakes on early cranes and span-control brakes metal linings can withstand extreme disc temperatures. Caliper disc brakes are
Dynapower's DC crane rectifiers have been designed to power any DC crane Control Precision: Voltage/current ±1% (higher precision available upon request)
Selection principle of electric equipment for metallurgical overhead crane cranes allow adopt ac drive and dc transmission at the same time, The control circuit
bridge cranes, bucket/grapple cranes, portal/whirly cranes, turbine cranes, tramways, and coke oven drives. AC hoist controller with compensated DC dynamic lowering Hot Metal, Infrared, Proximity and Optical Detectors and Sensors.
Hot metal handling crane means an overhead crane used for transporting or The control circuit voltage shall not exceed 600 volts for a.c. or d.c. current.
EMH engineered crane hoists include infinitely variable speed control of all motions. EMH long-lasting, durable crane hoists are equipped with DC rectified
作者：A Bhatia · 被引用次数：2 — of Bridge Crane. ❖ Essential Terminology when Specifying Overhead Cranes Controls - Controls for an EOT crane are usually mounted in an operator pendant or remote voltage at pendant pushbuttons shall not exceed 150 volts for AC and 300 volts for DC. bracket or trolley using a solid metal rod known as a lug.
WASHINGTON, D.C.. Document Name: Date of Action: e. ASME B30.2-2005: Overhead and Gantry Cranes Recommended Arrangement of Controllers (Radio Crane Control. Transmitter (2) windows with metal sash and heat-resisting,.
Metallurgical Crane Technical Requirements First, for the purpose of hoisting the molten metal by the universal bridge crane, it should be consumption brake, SCR power supply, DC power supply speed regulation, and other lifting for a long time should take protective measures for its electronic control equipment.
