Columbia MFG, LLC
501 NW 214th Circle
Ridgefield, WA  97103 
(360) 887-2967 - FAX: (360)-887-2269

Type ALPS
Hot Stick Operable Aluminum Trunnion Clamps
For Line Post Insulators

These clamps provide features which ill generally speed installation time and reduce the number of clamp sizes and variations needed to meet typical construction practices.  Each clamp accommodates a wide range of conductor sizes without reversing the clamping jaw.  they can be used for tangent suspension and shallow turn angles.

A unique captive bolt and pressure jaw assembly causes ALPS clamps to open automatically as the bolt is loosened.  This feature leaves both hands free to toll the conductor over the clamp edge and into the groove seat.  It also leaves one hand free to hold the conductor in place if needed while the bolt is tightened.  Bolt and pressure jaw are captive to the clamp body to prevent loose parts.  Opposing finger type guides align the body and jaw with the bolt to provide optimum clamping pressure.

Clamp body and jaw are high strength heat treated 356-T6 aluminum.  bolt and washer are stainless steel and bolt retainer is zinc plated steel.

Anti-Static Spring
All trunnion clamps are provided with a stainless steel anti-static spring in one of the trunnion holes.


Trunnion Clamp
Side View

 

Trunnion Clamp
Top View

Trunnion Clamp
Front view

 

Catalog
Number

Diameter
Inches

Conductor Range AWG or KCM
Concentric Bare Stranded Conductor
Conductor Range Using
Heli-Formed Arm or Rod
ACSR AAC ACSR AAC
 ALPS-57 .23 - .57 4 (6/1) - 4/0 (6/1) #4 - 4/0 6 (6/1) - 4 (7/1) 6 (7) - 4 (7)
ALPS-87 .35 - .87 1 (6/1) - 477 (26/7) 1/0 - 556.5 6 (6/1) - 3/0 (6/1) 6 (7) - 4/0 (7)
ALPS-12- .68 - 1.20 336.4 (18/1) - 954 (54/7) 350-1033.5 1/0 (6/1) - 397 (24/7) 1/0 (7) -397.5(19)
ALPS-150 .99 - 1.50 636 (26/7) - 1590 (45/7) 750 - 1600 300 (26/7) - 605 (26/7) 300 (19) - 556.5 (37)
ALPS-200 1.50 - 2.00 1590 (54/19)- 2156 (84/19) 1700 -3000 636 (24/7) - 1113 (45/7) 750 (37) - 1113 (61)
NOTE: Widely used conductor sizes are listed in the tabulation.  Refer to Diameter Range for additional information if your specific conductor is not show.
 

Note: All dimensions +/- .031 unless otherwise noted.

ALPS Clamp Dimensions
Cat. No. A B C
ALPS - 57 1.750 2.750 5.500
ALPS - 87 2.000 3.250 6.500
ALPS - 120 2.281 3.562 7.125
ALPS - 150 2.500 3.562 7.125
ALPS - 200 3.250 3.750 7.500

 

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This page revised 11/24/08