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LINES GP-STICK 2277960 - Caterpillar



2277960 LINES GP-STICK Caterpillar parts LINES
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Alternative (cross code) number:
CA2277960
227-7960
2277960
Caterpillar 2277960 LINES GP-STICK

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General Installation Information
Caterpillar automatic transfer switches have been factory wired and tested. Installation requires mounting of the switch, connection of power source and load lines, connection of the automatic start/stop circuit, and connection of any options. Protect the transfer switch against excessive moisture, construction grit, metal chips or shavings at all times.Unpacking And Handling
1. Carefully unpack the transfer switch.2. Inspect for any damage that might have occurred during shipment. Never install a transfer switch that has been damaged or is defective in any way.3. Attach any lifting devices to enclosure mounting holes or channels only. Do not lift the switch at any other points. Protect the transfer switch against impact.Transfer Switch Mounting
Typical Example1. Typical switch mounting dimensions are shown in illustration above. For the actual dimensions see the subject "Transfer Switch Mounting Dimensions" in the Specifications section of this manual.2. Mount the switch enclosure vertically to a strong, rigid supporting structure.3. If necessary, level all mounting points by installing washers behind mounting holes (to prevent distortion).Power Source And Load Line Connections
Schematic Representation Of A Typical Transfer Switch Installation
Turn off both the normal and standby power supplies to the transfer switch before attempting to connect power source or load lines. Failure to turn off all power voltage supplies will result in extremely dangerous - possibly lethal - electrical shock.
Conductors - Conductors must be properly supported, protected by approved conduit, have approved insulation qualities, and be of the correct wire gauge size in accordance with applicable codes. All conductors should enter the switch enclosure adjacent to their respective terminal lugs. Transfer Mechanism Terminal Lugs - The transfer mechanism may be either a 3 or a 4-pole type. A neutral block may be provided for connection of 3-phase neutral lines. The neutral block is not required when the neutral line is to be switched on a 4-pole, 3-phase installation.1. Connect normal power source 3-phase lines to terminal lugs N1, N2 and N3.2. Connect standby power source 3-phase lines to terminals E1, E2 and E3.3. Connect load lines to terminals T1, T2 and T3. See illustration below. 4. Before connecting lines to the proper terminal lugs, remove surface oxides from the conductors with a wire brush. If aluminum wires are used, apply joint compound to the stripped end of the conductor. After tightening the terminal lug, wipe away excess joint compound.Tighten terminal lugs to 5.7 N m (50 lb in) for units rated 100 amperes; to 28.3 N m (250 lb in) for all other units.2-Wire Start Terminal Strip
Connect suitable, approved wiring to transfer switch terminals 178 and 183 and to the proper terminals in the standby generator set. Closure of this circuit by transfer switch circuit board action must result in automatic cranking and startup of the standby generator. Recommended wire gauge sizes for this wiring depends on the length of the wire and should be as recommended below: Standard Auxiliary Contacts
Auxiliary Switches - Right Side Of Transfer SwitchA standard transfer switch has two single-pole dual-throw (SPDT) switches which provide the


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