Operating manual
Brakes for Asynchronous Motors / Asynchronous Motors IE2
2
ID 442015_en.04
WE KEEP THINGS MOVING
07/2014
en
- Loosen cheese-head screws (5).
- Adjust the air gap to the rated value by applying an open-
jawed spanner to the adjusting nuts (4). Two calliper gauges
are necessary to measure the air gap; the deviations at the
three measuring points should not exceed ±0.05 mm.
- Tighten cheese-head screws (5).
- Replace fan guard (1).
Replace brake:
When the minimum lining thickness gmin is reached, replace
brake disc (6). During the replacement, inspect the anchor
disc (7), lining (motor B bearing bracket), friction disc (8) and
brass foil (if installed). Replace if excessively worn. Anchor
disc (7) available only complete with brake coil (2).
Fig. 1
3
Electrical connection
-
Without rectifier
, connected voltage U
DC
see specification
plate (Fig. 3)
-
With rectifier and external supply
U
AC
(Fig. 2, Fig. 4) fast
rectfier (Powerbox) also included.
See specification plate for connected voltage U
AC
.
AC switching (with bridge B).
DC switching (fast application of the brake).
Remove bridge B in Fig. 2, replace with switch contacts and
employ additional AC switching.
- With rectifier and direct U
AC
supply
from the motor
terminals.
Install the enclosed connecting bridges as shown in Fig. 5 and
Fig. 6.
The following applies for connected voltage of the brake
(U
AC
) according to specification plate and supply voltage
(U
3AC
):U
AC
= U
3AC
x 0.58 (Fig. 5), U
AC
= U
3AC
(Fig. 6).
Connection of the brake to motor terminals possible only
when the voltages are equal.
Permissible only for direct starting with supply.
Connected voltage with Powerbox rectifier 220 - 277 V
AC
, coil
voltage 115 (or 127) V
DC
.
Observe terminal designations on the component.
For other designs or other installed equipment, see separate
circuit diagram.
While making the motor connection, observe and comply with
the attached safety instructions and the respective operating
instructions. Observe connection designation and connection
plan!
To be observed while using rectifiers:
If the full nominal power is used, or if the motor is driven only
with its own ventilation in the lower speed range (at drive
controller), then it is possible for the temperature of the motor
housing surface to exceed the
maximum permissible
ambient temperature
for Powerbox fast rectifier
(75° C)
or
for one-way or bridge rectifier
(80° C)
. In this case, installation
in the terminal box is not advisable, as the higher
temperatures can lead to the premature failure of the rectifier.
Instead, the rectifier should be installed in the control cabinet.
Of course, here too, a position should be selected at which
the temperature is always lower than the permissible ambient
temperature! For use under increased temperature
conditions, or operation through drive controllers, we request
you to please discuss the matter with our sales engineers.
