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Cranes shall be designed to preclude leakage of lubricants onto the lifted
loads or the floor. Equipment and components which cannot be made
leak-proof shall be fitted with suitable drip pans. Drip pans shall be
manufactured of steel and designed to permit removal of collected lubricant.
2.3.11
Lubrication System
Splash-type oil lubrication system shall be provided for hoist, trolley and
[bridge] [gantry] gear cases; an oil pump shall be used on vertical-mounted
gear cases exceeding two reductions. Oil pumps shall be the reversible
type capable of maintaining the same oil flow direction and volume while
being driven in either direction. Electric motor-driven pumps may be used
when input shaft speed is too low at any operating condition to ensure
adequate oil flow. In such applications, pump shall be energized whenever
drive mechanism brakes are released.
2.3.12
Electrically Driven Oil Pump Alarm
If an electric-driven lubricating pump is used, an audible alarm and red
indicating light shall be provided and shall be energized in the event of
pump malfunction.
2.4
ELECTRICAL COMPONENTS
2.4.1
Explosion Proof Requirements
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NOTE: Delete this paragraph if explosion proofing
is not part of design criteria. Define hazardous
classification and evaluate Contractor's proposal
for electrical equipment. Show location of the
hazardous areas.
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Equipment and wiring in locations indicated shall conform to NFPA 70 for
Class [I] [II] [III], Division [1] [2] hazardous locations. Equipment
shall be suitable for [Group [_____]] [operating temperature of [_____]
degrees C degrees F]. Wiring and equipment in locations indicated shall be
of the classes, groups, divisions, and suitable for the operating
temperature as indicated.
2.4.2
Control Systems
A separate controller shall be provided for each motor; however, a duplex
controller shall be used for two motor [bridge][gantry] drives. Overload
protection shall be in conformance with the requirements of NEMA ICS 2.
Contactors that are used for starting, stopping, and reversing shall be
mechanically and electrically interlocked.
2.4.2.1
Hoist Control System
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NOTE: Select the appropriate paragraph for system
desired. Delete auxiliary hoist when not required.
Selection of the desired control system must be
coordinated with the appropriate motor selection.
SECTION 14630A
Page 26
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