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Adjustable Strain Poles

Applications and design

Key to many transmission and EHV maintenance jobs, these hot-line tools help support conductors while insulators are removed and replaced. Adjustable strain poles can be used with yoke plates and hook assemblies at the conductor and structure ends of suspension, V-string or deadend insulator strings.

To support the hot-end trunnions or hooks, five stainlesssteel crosspins are located at 6" intervals on the 2"-diameter Epoxiglas® poles. To engage deadend and suspension yokes at the hot end also requires the adjustable pole clamp of heat-treated aluminum. This pole clamp can be unlocked and positioned by hotsticks.

On the cold end, a high-strength steel strain-jack with bronze tongue provides take-up with a ratchet wrench (see page 2257) and trunnions (page 2255). Wrench and trunnions must be ordered as separate items. Standard strain jack furnished with each strain pole provides 12" of adjustment. Longer strain jacks (for 24" or 36" of take-up) and extra pole clamps also may be ordered as options below.


Ordering Information


Adjustable Strain Poles

  • 7,500-lb. maximum load rating (2"-diameter Epoxiglas pole)
  • 2-ft. adjustment by Pole Clamp (furnished) in 6" increments on five stainless-steel pins
  • 12"-long Strain Jack E4011998 furnished as standard
  • Optional 24" & 36" strain jacks and extra pole clamps available below
Catalog No. Description Maximum Voltage Use Insulated Section Overall Length Weight
C4012144 6-ft. Strain Pole 72.5 kV 36 in. (91.44 cm) 7 ft.-8 in. 18 lb. / 8.1 kg.
C4012145 7-ft. Strain Pole 169 kV 48 in. (121.92 cm) 8 ft.-8 in. 18 3/4 lb. / 8.4 kg.
C4012146 8-ft. Strain Pole 242 kV 63 in. (160.02 cm) 9 ft.-11 in. 19 1/2 lb. / 8.8 kg.
C4012147 10-ft. Strain Pole 302 kV 84 in. (213.36 cm) 11 ft.-8 in. 20 7/8 lb. / 9.4 kg.
C4012215 12-ft. Strain Pole 362 kV 102 in. (259.8 cm) 13 ft.-2 in. 22 1/4 lb. / 10 kg.
C4012148 14-ft. Strain Pole 552 kV 135 in. (342.9 cm) 15 ft.-11 in. 23 3/4 lb. / 10.7 kg.
C4012149 18-ft. Strain Pole 765 kV 180 in. (457.2 cm) 19 ft.-8 in. 26 1/2 lb. / 11.9 kg.

Accessories

E4010138P 2" Adjustable Pole Clamp 2 lb. / 0.9 kg.
E4011998P 12"-Acme-thread Strain Jack 3 lb. / 1.4 kg.
V4010157P 24"-Acme-thread Strain Jack 4 lb. / 1.8 kg.
V4010158 36"-Acme-thread Strain Jack 6 lb. / 2.7 kg.
E4011510P Steel Through Pin 3/8 lb. / 0.17 kg.
059738P Klik Pin 1/16 lb. / 0.03 kg.
Hubbell Power Systems All contents Copyright© 2001 - Hubbell Incorporated. All rights reserved. Because Hubbell has a policy of continuous product improvement, we reserve the right to change design specifications without notice.
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