Brake type

• single disc brake mounted by means of a special mounting kit.

 

Braking principle

• by means of loose springs. The brake is lifted electro-mechanically with direct current voltage 205 V DC.

Supply

• standard single side rectifier 400V AC/DC, with possibility to switch also direct current side.

Cooling

• T.E.F.C. IC 411 according IEC 34-6 with standard external cooling.
  Protection class
• brake and electric motors IP55.

 

Adjustment

• reduction of the braking torque by means of adjustment ring (40% max.)

 

Special executions

• on request for instance:
    - manual brake release
    - separate motor cooling 230 V/AC or 400 V/AC
    - built-up to pole-changing motors
    - brake motors IP56
    - T.E.N.V. for S2 duty (so without cooling fan)
    - motors with increased output.

 

Description

• At high switching frequencies and/or mass of inertia the heat dissipation of the motor and the brake is to be considered.
• The operating temperature is determined by the braking energy (Q) and the (starting) losses of the motor transformed into heat.
• Whether temperature limits are being reached, can only be established when the running conditions are known. The table shows the maximum allowable braking energy QE

 

Special features

• low rotating mass
• short built-up method
• air gap adjustable without disassembling the brake
• brakes at power failure

 

Maintenance

• The brakes are practically maintenance free, but the friction material will of course wear over a period of time (depending on the switching frequency and the mass inertia to be braked).Therefore it is necessary to check the width of the air gap for the maximum value (see table SL max.). When this maximum value is reached, it is possible to re-adjust the motor for a number of times. When the minimum thickness of the friction disc is reached after a certain number of adjustments, it has to be replaced. The friction disc is allowed to wear a few mm as indicated in the table by B.

 

Adjusting the nominal air gap

• remove the fanhood (9)
• loosen the socket head bolts (11)with 3 turns
• turn the hollow air gap adjustment bolts (2) one full turn to the outside
• screw down the socket head bolts (11) and measure the airgap with a feeler gauge. Repeat the above mentioned three steps until the nominal air gap SL(see table) is established all around.
• mount the fan (8) and the fanhood (9)
• submit the brake motor to a running test

 

Replacing the friction disc

• remove the fanhood (9)
• remove the fan (8) by means a pulling tool
• loosen the 3 or 4 socket head bolts (11) in the brake coil case (5)
• remove the brake coil case (5) and leave the thrust piece (10) on the shaft
• replace the friction disc (6) and record for your own information, if required, the replacement date on the new disc
• screw down the 3 or 4 hollow airgap adjustment bolts (2) as far as possible into the brake coil case (5)
• refit the brake coil case (5)
• screw down the 3 or 4 socket head bolts (11). The hollow airgap adjustment bolts (2) can now be unscrewed again up to the brake disc surface. Now the air gap is zero
• adjust the air gap as described in the previous section.

 

Adjustment of the brake torque

• The brake is standard adjusted on the nominal brake torque. It can be reduced by a maximum of 40% by turning the adjustment ring (12), which is on the brake coil case, towards the fan according to the table below.