Nabrico DF-1 N Series, Owner'S Manual

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NABRICO DF-1 N ELECTRIC WINCH Owner’s Manual
OM-DF1-021-A
E.1 NORD BRAKE TECHNICAL INFORMATION
MOTOR BRAKES
INSTALLATION & MAINTENANCE
RETAIN FOR FUTURE USE
General Instructions
This manual describes general operating and maintenance
guidelines for a majority of brake products shipped by NORD
Gear. This instruction manual is not intended to include a
comprehensive listing of all details or procedures required
for installation, operation and maintenance.
Brakes covered in this manual are manufactured by PRECIMA.
Please feel free to contact NORD with any questions about
the supplied brake components.
Safety Notice
Only qualified personnel should attempt installation, opera-
tion and maintenance of NORD brakes. Read this manual in
its entirety before operating, commissioning, servicing, or as-
sembling the motor brake. If you have a question about a
procedure or are uncertain about any detail, seek clarifica-
tion and DO NOT PROCEED!
WARNING
• This equipment contains high electrical voltage.
Remove and lockout all power from the electric motor
and brake before any work is completed on the brake.
• The user is responsible for conforming to all national
and local electrical and safety codes. Wiring practices,
proper grounding, disconnects, and over current
protection, are of particular importance.
• Make certain the load is supported when servicing the
brake. Removing power from the brake or removing
the brake from the motor will release the load, which
may cause severe injury or death.
• Failure to follow proper procedures and precautions
may result in severe bodily injury or death.
Brake Operation
The standard NORD motor brake is “spring-set”. When pow-
er is removed and the brake is de-energized (power-off), the
brake springs exert a force against the armature plate in
turn preventing the brake rotor (or brake disc) from rotat-
ing. When the brake coil is energized (power-on), a magnetic
field builds and pulls the armature plate across the air gap to
the brake casing, which releases the brake rotor and allows
the motor shaft to rotate.
Figure 1: Basic Brake Operation
NORD brakes are DC voltage brakes and in most instances
are supplied with a motor mounted brake rectifier for easy
connections to AC power. AC power is taken directly from
the power line or from the terminal block of the motor and
converted to DC by the supplied rectifier.
IMPORTANT NOTE
If the motor is connected to a frequency inverter, soft start,
or is a two-speed motor, the AC power must be supplied to
the brake rectifier separately from the motor power.
Advantages
• Each NORD motor frame size has a number of brake sizes
available, with different torque capacities.
• Brake torque adjustments are possible by changing the
brake spring combinations. In addition, brake sizes from
5-40 Nm (3.7-30 lb-ft) are typically supplied with an addi-
tional spanner-nut adjustment on the back of the brake.
• NORD brakes provide a high degree of safety because
when power is removed the brake will automatically set to
hold the load.
• The brake rotor or brake disc is environmentally safe and
asbestos-free.
• The connection between the rectifier and the brake coil is
completed at the factory and the brake air-gap is factory-
set but can be adjusted in the event of wear.
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NORD Gear Corporation
Toll Free in the United States: 888.314.6673
NORD Gear Limited
Toll Free in Canada: 800.668.4378