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Transmi ss ion Tool s – 2250
Page 2258
September 2012
Phone: 573-682-5521 Email: hpsliterature@hubbell.com Web: hubbellpowersystems.com
Features & Applications
• Tested per OHSA & ASTM F711
• Three basic types of Insulator Cradles are available for
various insulator changeout requirements:
o Transmission Cradle is designed to be used on 69 kV
to 115 kV deadend or suspension strings supported
by a pair of wire tongs or link sticks
o EHV Trough-design Cradle is designed to be used
on 345 kV to 500 kV deadend or suspension
strings and in combination with insulator cradle
carriers for moving the insulators (See catalog
page 2259)
o EHV Side-Opening Cradle is designed to be used
on only EHV deadend strings for removing only
one string in a double, triple or quad deadend
bundle (See catalog page 2260)
Features & Applications
• Used to make insulator changes by supporting the
string while damaged insulators are replaced
• Also used to pivot the string so that it may be removed
and lowered to the ground
• On deadends or running corners, cradles are used in
conjunction with strain carriers
• In straight suspensions, they are used with various
types of link sticks or adjustable strain pole assemblies
• Made with three 1-1/2" dia. Epoxiglas
®
poles
• Lightweight, easy to handle and adaptable to many
applications
• Lugs, located at the forward end of the cradle, are
used to support the insulator string with a pair of
wire tongs or link sticks
• Back end of the cradle is supported by ropes tied at
the structure
• Hinged in this manner, insulators may be lowered
or raised to the best position for changing damaged
insulators
• In some cases, cradle is supported in eyes located on
the forward yoke of Two-Pole Strain Carriers
• This is performed when raising or lowering of the
insulator string is unnecessary
Insulator Cradles
TRANSMISSION INSULATOR CRADLE
Approx.
Weight
19
3
/
4
lb./ 8.887 kg.
24  lb./11.262 kg.
27  lb./13.837 kg.
Overall
Length
6-ft. (180cm)
8-ft. (240cm)
10-ft. (300cm)
Photo at right shows the insulator
cradle being raised or lowered with
the use of wire tongs.
Recommended
Capacity
10 10" (250mm) Insulators
14 10" (250mm) Insulators
18 10" (250mm) Insulators
Cradle
H18406
H18408 or
H184010
Catalog
No.
H18406 
H18408 
H184010
2 pcs. x 9'
Tested per OSHA & ASTM F711