Yokes are intended for attachment of the strain poles to yoke plates, extension links or any other types of supports on the structures, in order to relieve the mechanical load on single or multiple insulator strings, on cold end or suspension structures, for damaged insulator replacement.

These yokes and components have been developed to be attached to various structure configurations. Should the models available herein not meet a specific type of structure, technical drawings of the frames or tower supports have to be submitted for evaluation to Terex engineering department to ensure the proper yoke and components will be designed.

The yokes are made of cast aluminum alloy, heat-treated or from highstrength laminated aluminum plate.

NOTE: The safety click counter-pin (R059738) can be ordered separately as a replacement part.

Two-pole strain carrier Yokes

The two former versions of the cast aluminum yokes and aluminum laminated plate yokes have been replaced as follows:

- RC401-1720 replaces former RM2946-1

RM2946-1 yoke includes sockets (RM2945-1, RM2945-3 and RM2945-9)

RC401-1720 yoke includes steel hook and 7/8” x 1-1/2” socket (RC401-1894)

- RC401-1721 replaces former RM2946-12

Both yokes are supplied with steel hook. The hot-end and cold-end yokes can be ordered separately as replacement parts of strain carriers types RC401-2174 through RC401-2179.

- RC401-0095

This yoke is used with Two-pole strain carriers, requiring no shoulder or adapter to pull against, since it grips on the compression sleeve of the cold end string.

Shoes have movable device to enable the introduction and locking of the clamp before straining.

Prior to installation, a proper shoe must be defined according to the size of the conductor to be strained.

NOTE

The shoe must be attached directly over the compression sleeve.

 This yoke is supplied with 04 interchangeable shoes:

- 24 AH for conductors from 477 through 556.5 kcmil ACSR diam. 21.7 to 23.4 mm (0.85" to 0.08 ft)

- 30 AH for conductors from 715 through 954 kcmil ACSR diam. 27.4 to 29.6 mm (1" to 0.1 ft)

- 36 AH for conductors from 1192.5 through 1351.5 kcmil ACSR diam. 34 to 36.2 mm (1.3" to 0.12 ft)

- 3/4" through 1" (diam. 19 through 25.4 mm)

-    RT401-0935

Hot-end suspension string yoke, for attachment to triple or quadruple bundle yoke plates, used together with clevis-clevis strain poles. Made of high-strength laminated aluminum plates.

TWO-POLE STRAIN CARRIERS

Single Pole Strain Carrier Yokes

Yokes can be used with adjustable strain poles (series RC401-2144 to

RC401-2149) to relieve the mechanical straining from double and multiple insulator strings, both on cold end and suspension structures, during insulator replacement.

These yokes have been designed to fit various types of yoke plates and should be purchased in pairs, according to the structure hardware design. In some situations, they can be used on both the hot and cold end of the insulator string.

For certain applications, some yokes may be used alternatively (refer to table containing the rated work load):

- RC401-1717 yoke may replace RM1947-1 yoke

- RC401-1718 yoke may replace RC401-0003 yoke

- RC401-1719 yoke may replace RC401-0155 yoke

SINGLE POLE STRAIN CARRIER YOKES