DYNAMICS GROUP Dings 8-61003-67B Petunjuk Manual - Halaman 2

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Halaman Cetak
WARNINGS
A.
Read this bulletin carefully before installing or operating the brakes. Failure to comply
with the installation or operating instructions cancels all warranties and may cause
injury to personnel and damage to property.
B.
DESCRIPTION
The 60 and 70 Series brake for hazardous location is a direct acting, electromagnetically
released, spring set brake that utilizes rotating and stationary disc contact to supply
positive braking action. Brakes can be mounted independently of any other equipment
by using a U.L. listed foot mounting bracket, or mounted in a location approved by U.L.
to an electric motor listed for corresponding hazardous locations. The brakes are
equipped with a thermal overload mechanism that will prevent the external surfaces of
the unit to reach or exceed the lowest temperature for the Classes and Groups for which
the brakes are listed.
C.

OPERATING INFORMATION

When the external surface of the brake approaches the specified temperature limit, the
thermal overload mechanism will automatically release the brake and hold it in the
released position. The thermal overload mechanism prevents the surface temperature of
the brake from rising to a level that could ignite the surrounding gases or dusts by
releasing the brake and therefore, stopping a further increase in temperature. Once the
brake has been released by the thermal overload mechanism, control over the rotation of
the motor and movement of the load is lost. This uncontrolled rotation of the motor and
movement of the load could cause injury to personnel and damage to property.
The brake is also equipped with a thermal switch. When properly wired into the motor
starting circuit, the thermal switch shuts down the motor before the thermal overload
mechanism releases the brake. When the thermal switch activates, it stops the motor and
load, preventing the uncontrolled motion described above.
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