Air Motors - Brawn BGM33 Operation And Maintenance Manual

th
3389 ~ 128 Avenue Holland, MI 49424
ELECTRIC MOTORS, Cont.
INSULATION RESISTANCE
Check insulation resistance periodically. Any approved
method of measuring insulation resistance may be used,
provided the voltage across the insulation is at a safe
value for the type and condition of the insulation. A hand
crank megger of not over 500 volts is the most
convenient and safest method. Standards of the Institute
of Electrical and Electronics Engineers, Inc., recommend
that the insulation resistance of the stator windings at 75°
C, measured at 500 volts dc, after one minute should not
be less than:
Rated Voltage of Machine + 1000
1000
This formula is satisfactory for most checks. For more
information, see IEEE Standard No. 43 "Recommended
Practice for Insulation Resistance Testing of AC Rotating
Machinery."
CLEANING
WARNING
Do not attempt to clean the motor while it is operating.
Contact with rotating parts can cause severe personal
injury or property damage. Stop the motor and lock out
switch before cleaning.
The motor exterior must be kept free of oil, dust, water,
and chemicals. For fan cooled motors, it is particularly
important to keep the air intake openings free of foreign
material. Do not block air outlet or inlet.
On non-explosion-proof TEFC motors, a removable plug
in the bottom center of the motor frame or housing
permits removal of accumulated moisture. Drain
regularly.
Copyright 2015 BRAWN Mixer, Inc.
BGM-S
ERIES
Insulation Resistance
=
in Megohms
www.BRAWNMIXER.com
8/6/2015
O & M
PERATION
Phone: 616/399-5600 Fax 616/399-3084

AIR MOTORS

If your mixer was supplied with an air motor, certain
precautions must be taken as follows:
1. The mixer was shipped with a needle valve installed
on the motor inlet port. A muffler is provided for
installation at the exhaust port. The function of the
needle valve is to control the motor speed.
2. The air supply must be adequately sized to provide
the proper pressure and volume of clean filtered, dry
air. A pressure regulator followed by an air line
lubricator is required prior to connection to the
needle valve. A combination filter/regulator/lubricator
is commonly used for this purpose. The air line filter
should be capable of 25 micron or better.
3. Blow out the air supply line before connecting to the
motor to remove any dirt or debris in the air line.
4. The exhaust port must not be obstructed such as to
cause a back pressure on the motor. An obstructed
exhaust has an adverse affect on the air motor. This
may also cause the motor shaft seal to fail thus
pressurizing the gearbox and/or mixer drive housing
and causing seal failure.
AIR MOTOR ROTATIONAL
DIRECTION DIAGRAM
M
AINTENANCE ANUAL
Page 6 of 9