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Resistance Boxes
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The Crane Control Equipments makes Resistance Boxes that are designed for both A.C. & D.C. applications. Our Stainless Steel Grid Resistance Boxes are used in winches,E.O.T Cranes, Rolling Mills, Steel Plants, Flour Mills, Cement Plants, Power Plants, Coil Mines etc., for speed controlling and developing of higher starting torque. We have carved a niche as one of the dominant Punched Steel Resistance Boxes Suppliers based in India. These resistance Boxes can be designed to BSS/NEMA/IEEE standards. We can also design and manufacture the resistors as per any specific standards specified by the customer. Generally the resistor grids are either made of Stainless Steel wire or Punched Steel Sheet or in Fechral Material. The Resistance boxes manufactured are suitable for a maximum temperature rise of 3750C as stipulated in BSS standards. Stainless Steel Grid Resistance Boxes:- In this case the resistor grids consist of corrosion resistant stainless steel wire or strips. Current rating generally ranges from 7 Amps to 80 amps continuous. Higher ratings are possible by using multiple parallel paths. The size of the wire is determined based on the technical data of the motor on which the Resistance Box is to be connected. The drawn resistor material is uniform in section and free from any flaw or unevenness which is likely to cause local heating. Suitable sizes of strips / wire are employed to give a wide range of current ratings. The Grids are supported in such a way that the adjacent Grids cannot touch each other even under the most severe conditions of service. The resistor elements consists of a continuous length of resistance wire or strip of uniform section formed into the required number of loops and bent so as to form frames with flanged edges similar to an element. These are then mounted on Mica insulated Steel rods with Mica Washers between Steel spacers acting as Grid spacers. The whole assembly thus forms a stack. Number of these stacks is formed to achieve the correct design of Resistance box required. Punched Steel Resistors:- In this case the Resistance boxes are made from Nickel Chromium Alloys Sheet Steel or Fechral as the case may be. Depending on the rating required the grids which are previously punched on a die fixture are assembled to from the desired Resistance Box. The inherent strength of the steel itself is quite high and owing to the reinforced and pressed construction the rigidity of the Punched Grid is even higher. Also since the grids are in form of Punched Sheet these are completely immune to shock and vibration. They function reliably under the worst operating conditions. These Resistors are available in a wide range from 19 amps to 234 amps continuous. Also the fixing dimensions and weight of various types of Grids are identical which means that different type of Grids required for various steps of Resistance would have identical size and mounting dimensions. The heat dissipation of Punched Steel Grids is uniform irrespective of the current rating. To enable us calculate the Resistance box we will be requiring the following information: Capacity of MotorRotor Voltage of MotorRotor Amps of MotorNo. of Steps and type of Grids required
UFI Box
19,500 - 20,000 Per piece
1 Piece (MOQ)
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Punched Grid Resistance Box
22,000 Per Piece
Decade Resistance Box
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Resistance Box
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We are leading supplier of Resistance Box
Resistance Box
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Resistance Box, Plug Pattern (766) Fitted in polished wooden box with bakelite top panel. Values are figured in front of respective sockets made of split brass contact blocks hold precision cut. Plug keys are made of brass and interchangeable. Plug keys are fitted in moulded bakelite top. The resistances are made of constantan wire, accuracy ± 0.1%. Ranges Total No. of Coils (ohms) Resistance (Ohms) a) 1-50 110 8 b) 1-100 210 9 c) 1-500 1110 12 d) 1-1000 2110 13 e) 1-5000 11110 16 f) 1-10000 21110 17
Resistance Boxes
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Application: Controlling motors with resistors is a universal method of speed control. The resistors are used to limit the in-rush current and adjust the torque and speed characteristics of an ac and dc motor By changing the resistant on the rotor (through contactor), you can limit the starting torque and speed of the motor for your specific application. SPEEDAGE make Resistors are designed to meet requirements of A.C & D.C. application for E.O.T. Cranes, Winches, Rubber Mills, Flour Mills, Coal Mines, Cement Mills, Power Plants, Conveyors, Coke Oven, Blowers etc. for Speed control and developing Starting Torque. The specification comply with BSS 587: 1957 ENCLOSURE FEATURES • overhung top with canopy to prevent standing water and will support heavy ice and snow.• Forged eyebolts are provided in all four corners for easy handling.• Removable front and rear louvered covers for easy access for connection and inspection.• Corrosion resistant nameplate provides complete ratings and manufacturer's information.• Galvanized Iron Sheet provides maximum protection. ENCLOSURE OPTIONS • Aluminum, mill galvanized, stainless steel and hot-dipped galvanized construction. Custom paint finish is also available.• Top or side mounted entrance bushing(s).• Screened covers for indoor applications.• Support stands for elevating the enclosure above ground.Stainless Steel Wire Grid type ResistorsStainless Steel Punched Grid type Resistors These are designed and manufactured for current ratings form 10 Amps. to 234 Amps. Continuous Resistors of higher ratings are manufactured by using 2 or more parallel paths. Resistors with short time ratings up to 3000 Amps. or even more for neutral grounding are possible which are suitable for system voltage up to 11 KV and above
Resistance Boxes
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The Resistance Boxes are used for heavy duty requirements of controlling the current in the circuit for various applications. Starting and speed control of AC Slip Ring motors with Resistors is a universal method. The resistor is used to limit the inrush current and control the torque and speed characteristics of an AC Slip Ring Motor.By changing the resistance in the Rotor Circuit in various steps (thru a Contactor), the starting torque and speed of the motor can be controlled to the desired value. APPLICATIONS : • EOT CRANES & WINCHES • RUBBER MILLS & FLOOR MILLS • COAL MINES & SUGAR MILLS • STEEL PLANTS & CEMENT PLANTS • POWER PLANTS & PAPER PLANTS
Resistance Box
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Resistance Box (Plug Type) is of a superior quality Heavy Brass Metal Blocks Size 7/16" are bound to Bakelite Plate by means of nuts and screws securing rigid fixation and eliminating any chance of contact error creping due to loosening of plugs and lugs which are cut to fine taper and are interchangeable. Plug heads are machine moulded, of heavy insulated Bakelite in beautiful shapes. The boxes are made of Teak-wood and nicely polished. We are renowned as one of the staggering High Power Resistance Box Suppliers in India. Great care is taken in preparing the wire wound resistance. Selected double Covered Eureka Wire is wound in Bakelite spools. Sufficient ageing and Heat Treatment is processed through to avoid any moisture effects. Solder Joints are sealed after calibration. The Decade Resistance Box is calibrated on imported Testing Bridge Accuracy ± 0.1%.
weather resistance thermocol packaging boxes
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weather resistance thermocol packaging boxes
resistors resistance boxes
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resistors resistance boxes, Neutral Grounding Resistors
Resistance Boxes
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Resistance Boxes, control gear equipment, Electro Hydraulic Thruster Brakes
Resistance Box
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eureka wires, Resistance Wire
