D C Electro Magnetic Brakes

Product Description

Mill duty DC ElectroMagnetic Brakes are suitable for 220 Volts DC supply and are available for a drum diameters from 100mm to 800mm DC ElectroMagnetic brakes are used to retard or to stop moving loads or rotating masses and to prevent damage to men and equipments

FEATURES of D C Electro Magnetic Brakes

• Robust construction and simple design
• Reliable braking action
• Efficient transmission of forces
• Brakes shoes replacement without dismounting
• Ease of maintenance
• Ease of torque adjustment

AIR GAP

The brake is released by powerful short stoke electromagnet The gap between the coil and the armature is to be maintained to about  03 mm Brake coil is encapsulated with epoxy resin and is Class F insulation

TECHNICAL DATA

Class of insulation of coilF

Maximum operative voltage660V

Rated supply220V DC

SELECTION OF BRAKE SIZE

Brake torque of 180 to 250 of motor rated torque is sufficient for normal applications like Cranes Hoists and other material handling equipments  For CT  and  LT drives  braking  torque  of 180 to 150 of motor rated torque will ensure braking without excessive noise and mechanical jer

Rated motor torque is given by

Mb T  7162 x HP   OR  975 x KW

Where  KW or HP is motor rated power and RPM is motor rated speed in revolutions per minute

INTRODUCTION

The coils of DC Electromagnetic brakes need DC supply for operation DC rectifier panel converts AC mains supply to DC output supply Typical application examples are EOT Cranes conveyors rolling mills etc

Rectifier Panels are supplied with different combinations and can be offered for feeding single or multiple brake coils

THE STANDARD PANELS

The standard Panels can be offered for

Single Brake operated individually or

Two Brakes operated individually or

Two Brakes operated simultaneously

CONSTRUCTION

Brake Rectifier Panel is a fabricated sheet enclosure and has two sections the top compartment is for resistor assembly and bottom for controlling switch gear items like contractors rectifier bridges etc The unit is designed for floor mounting High quality rectifier has sufficient capacity to sustain overvoltage and current transients Wound Resistors have Nichrome  Eureka wires The Contractors and Timers are of suitable ratings and are from reputed manufacturers

DEGREE OF PROTECTION

The standard enclosure for rectifier unit conforms to IP54 degree of protection as per IS  13947 Part I   1993

The Resistor unit is IP 23