INTORQ BFK458 - Maintenance and Repair; Checking the Air Gap; Release; Voltage

Maintenance and repair
INTORQ | BA 14.0168 | 11/2018 65
8.3.3 Checking the air gap
DANGER
Danger: rotating parts!
The motor must not run while the air gap is being checked.
1. Measure the air gap s
L
between the armature plate and the stator near the fastening screws using a
feeler gauge. (Refer to table Rated data for air gap specifications
,Page23 for the values.)
2. Compare the measured air gap to the value for the max. permissible air gap s
Lmax
. (Refer to table
Rated data for air gap specifications
,Page23 for the values.)
3. Adjust the air gap to s
LN
. (Refer to Adjusting the air gap
,Page66).
8.3.4 Release / voltage
DANGER
Danger: rotating parts!
The running rotor must not be touched.
DANGER
There is a risk of injury by electrical shock!
The live connections must not be touched.
1. Check the brake functionality when the drive is running: The armature plate must be tightened and the
rotor must move without residual torque.
2. Measure the DC voltage at the brake.
– Compare the measured voltage to the voltage specified on the name plate. A deviation of up to
10% is permitted.
– When using bridge/half-wave rectifiers: After switching to one-way voltage, the measured DC
voltage may drop to 45% of the voltage specified on the name plate.