Adjustable Strain Poles
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 stainless steel cross pins are located at 6″ intervals on the 2″-diameter Epoxiglas® poles. To engage dead end 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 hot sticks.
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.
Specifications:
-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. |
| 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. |
