ANSI/NEIS 430:2006 pdf download.Istalling Medium-Voltage Metal-Clad Switchgear.
e) Unload switchgear shipping sections from the delivery truck using a crane (See Figure 1). Attach a lifting cable at each of the four (4) lifting points to lift and move sections. and use load-rated slings or cables with safety hooks or shackles. Use spreader bars to maintain proper angles for lifting and to prevent slings or cables from rubbing against equipment. Rig the lifting slings or cables so that the minimum angle between lifting slings or cables and the top of the equipment is 45° and the maximum interior angle is 900. Interior angles greater than 90° apply greater inward pressure of lifting lugs which can damage or dislodge lifting lugs from switchgear. Remove and discard lifting lugs after the equipment has been placed in position. Screw bolts hack into place to cover the mounting holes.
f) Preferably, use the circuit breaker truck for elevating and transporting circuit breakers. Use manufacturer-provided structural lifting points when hoisting or lifting circuit breakers. If it is necessary to lift circuit breakers with a hoist or crane, verif,’ that it is capable of supporting a minimum of 1,000 pounds, and use four 4-1/2 inch (115 mm) diameter hooks rated a minimum of 500 pounds each. Attach lifting hooks to the lifting provisions located on the side frame members of the circuit breakers. Use a spreader that is wider that the circuit breaker to prevent slings from contacting interrupter supports. Do not lift circuit breakers by placing forklift bars beneath the circuit breaker frame.
g) If crane facilities are unavailable, use rollers under the shipping skids or consult the manufacturer for recommendations. Maintain shipping skids to protect switchgear from being distorted or damaged during handling. Do not handle switchgear directly on rollers.
h) Preferably, install switchgear in the final installa(ion location upon delivery. When switchgcar is stored in other than the final installation location, coordinate staging to minimize handling.
i) When handling circuit breakers on a smooth, flat surface, roll and maneuver circuit breakers by grasping the top edge of the front cover. 1)o not use the main contacLs of circuit breakers or primary lead assemblies as lifting handles.
3.3 Storage
a) Store switchgear indoors in a clean, warm, dry, well -ventilated room with a moderate temperature ranging between 40°F and l00°E Outdoor switchgear is not considered weatherproof until installation is complete.
b) Store switchgear in its permanently installed location whenever possible.
c) Protect switchgear from rain, snow, dirt, and dust, until final assembly is completed, especially considering switchgcar bus runs and openings in shipping splits.
d) Protect switchgear and circuit breakers from corrosive gases or fumes, dust, foreign objects. and rodents. Moisture in combination with cement dust is very corrosive.
e) Store switchgear in a monitored area to discourage vandalism and theft, and out of the way of construction traffic.
1) Lubricate important parts such as jack-screws, gears and chains of racking mechanisms, linkages, and moving parts with manufacturer-recommended heavy oil or grease to prevent corrosion or rust.
g) Maintain switchgear internal temperature approximately 10°F above ambient temperature during storage.
1. Temporarily energize switchgear space heaters from an outside source. Open the control power transformer secondary disconnecting means, remove the primary fuses, and install an out-of- service tag before energizing space heaters from an outside source to prevent backfeeding the main bus through the control power transformer.
2. Use temporary heating source with switchgear that is not equipped with space heaters. Maintain a minimum of 20O Watts of heat per circuit breaker and primary cable compartment. Remove all cartons and other miscellaneous materials packed inside units before energizing heaters. Do not use sources of heat that generate smoke, grease, or other products of combust ion that can deposit carbon on insulation, resulting in tracking, corona, and eventual insulation failure.
