NORD Drivesystems B1000 - Manual (Page 711)

www.nord.com G709 G1000 – Subject to Change Without Notice
MOTORS
Additional
Options
Totally Enclosed Non-Ventilated (OL)
NORD can provide totally enclosed non-ventilated
(TENV) motor enclosure. TENV motors provide ben-
efi ts in certain operating environments; such as ex-
tremely dusty or dirty applications, where cooling fans
may have material accumulation, which can be detri-
mental to the motor and the application. The OL series
of motors are the standard fan cooled motor construc-
tion including the fan cover, but provided without the
fan. TENV motors can also be used to reduce cooling
fan noise on a standard motor.
A TENV motor’s frame size is larger then a totally en-
closed fan cooled (TEFC) motor. For intermittent op-
eration, a TENV motor can be operated at a 50% duty
cycle at full rated power.
Totally Enclosed Non-Ventilated,
without Fan Cover (OL/H)
The OL/H series of TENV motors are more compact in
space than the OL series. They do not include the rotor
shaft extension through the back bearing end bell or
the fan cover.
2nd Shaft Extension on Fan Side (WE)
NORD can provide a second shaft extension on the
fan side of the motor that protrudes through the
fan cover. This extension can be used as a power
take-off or to mount customer supplied devices
such as encoders and tachometers.
The shaft extension can be provided on both mo-
tors with and without brakes. The shaft exten-
sion can not be used on motors with blower fans
(F) or (FC). For dimensions see pages 720 - 721.
Hand Wheel (HR)
Motors can be supplied with a hand wheel pro-
vided on the second shaft extension. The hand
wheel can be used for manual operation during
power outages, or for machine positioning setup.
For dimensions see pages 720 - 721.
Warning
The customer is required to provide appropriate
safety guarding of the rotating hand wheel.
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