CRADLE

There are three basic cradle solutions to meet a variety of insulator maintenance and replacement requirements.
All are built with RITZGLAS® tubes for work on 110 to 800 kV anchor or suspension strings.

-    Single Insulator Cradles
It is generally used in 110 to 230 kV strings, supported by a pair of wire tongs or strain link stick.

-    Cradle with fittings
It is used in 345 to 500 kV strings and in combination with cradle supports to allow insulators movement.

-    Cradle with bracket (side opening) for extra high voltage
It is used in anchor strings up to 800 kV to allow single or multiple string removal. 

Single Insulator Cradles

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It is used to change insulators in the string itself or to lower it to the ground. In anchor strings or angled strings, this cradle is used in conjunction with support rods. As for “I” suspensions, strain poles are used. Constructed with Ø 38 mm RITZGLAS® tubes, this series of single cradles has two steel pins at their front, which are used to support the insulator string with a pair of wire tongs or strain link stick. At the rear of the crib there are large eyes and ropes for coupling to the structure as an anchor point. In this way, the insulators can be raised or lowered to a more suitable position for replacement. When lowering the insulator string is not necessary, the cradles are mounted to the eyes located on the yokes coupled to the strain poles.

TRANSMISSION INSULATOR CRADDLES

Catalog Reference	Maximum Capacity	Insulating Length (m)	Approx. Weight
			kg	kg
RH1840-4	6 insulators up to Ø 254 mm	1,22	5,80	12,79
RH1840-6	10 insulators up to Ø 254 mm	1,83	7,00	15,43
RH1840-8	14 insulators up to Ø 254 mm	2,44	8,30	18,30
RH1840-10	18 insulators up to Ø 254 mm	3,05	12,20	26,90
RH1840-12	22 insulators up to Ø 254 mm	3,66	14,70	32,41

 

SPARE PARTS AND COMPONENTS

Catalog Reference	Description	Approx. Weight
		kg	kg
FLV19067-1	Cradle center spacer	0,80	1,76
FLV17458-1	Metal spacer with side cradle holders	1,00	2,20
FLV17445-1	Metal spacer with side eyes and 2.50 m insulating rope at its cradle ends	1,60	3,53
RH4540	RITZGLAS® tube, Ø 38 mm x 1.22 m, with plastic end fitting	0,90	1,98
RH4540-1	RITZGLAS® tube, Ø 38 mm x 1.83 m,  with plastic end fitting	1,30	2,87
RH4540-2	RITZGLAS® tube, Ø 38 mm x 2.44 m, with plastic end fitting	1,70	3,75
RH4540-3	RITZGLAS® tube, Ø 38 mm x 3.05 m, with plastic end fitting	2,10	4,63
RH4540-4	RITZGLAS® tube, Ø 38 mm x 3.65 m, with plastic end fitting	2,50	5,51

 

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Cradle with fittings

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It is used to change insulators in strings up to 500 kV. It is also required to lower “V” or anchor insulator strings and to lift “I” suspension insulators. The deep design of the cradle is a safe way to prevent accidental fall of the insulator string. In addition, it is reinforced by the upper insulator retaining plate, which securely holds it during transport. The insulator plate has dual use: on one side fits insulators up to Ø 273 mm; and, on the opposite side, it adapts to insulators up to Ø 286 mm. The cradle can be easily lowered or lifted for insulator change through the forged steel swivel eyes at one end and the other with the aid of the steel handle (R070184) attached to a strain link stick, and it also has an auxiliary hook (R068922). The steel strap and hook are supplied with the cradle.

 

EHV THROUGH DESIGN INSULATOR CRADLES

Catalog Reference	Maximum Capacity	Insulating Length (m)	Approx. Weight
			kg	lb
RC401-0015	25 insulators up to Ø 286 mm	3,40	16,40	36,16
RH1950-9	19 insulators up to Ø 286 mm	2,69	14,90	32,85

PARTES E COMPONENTES PARA REPOSIÇÃO

Catalog Reference	Description	Approx. Weight
		kg	kg
FLV17453-1	Cradle center metal spacer	1,60	3,53
FLV17446-1	Aluminum cradle plate	2,60	5,73
FLV17447-1	Metal spacer with side cradle holders	1,60	3,53
R068922	Plastic coated steel hook	0,55	1,21
R070184	Galvanized steel handle	1,10	2,43
FLV18594-4	Ø 38mm RITZGLAS® tube for RC401-0015,  with plastic terminal and metal head	3,23	7,12
FLV18593-4	Ø 38mm RITZGLAS® tube for RC401-0015,  with plastic terminals	2,60	5,73
FLV18594-3	Ø 38mm RITZGLAS® tube for RH1950-9,  with plastic terminal and metal head	2.70	5.95
FLV18593-3	Ø 38mm RITZGLAS® tube for RH1950-9,  with plastic terminals	2.07	4.56

 

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Cradle Support

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It is made with Ø 64 mm RITZGLAS® tube and its main structure has a heat-treated aluminum head with forged steel swivel eye and three pairs of hooks, which are coupled to a spiral link pole and act as a support.

CRADLE SUPPORT

Catalog Reference	Maximum Capacity	Insulating Length  (m)	Rated Work Capacity		Approx. Weight
			daN	lb	kg	lb
RH1950-90	Cradle support with 3 pairs of hooks	2,97	227	500	13,40	29,54

Support Cradle

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It has been developed for the selective removal of a single insulator string, particularly, in double, triple, or quadruple anchor strings. Using this cradle, it is not necessary to remove the upper strings to extract the lower strings.

Constructed with Ø 64 mm RITZGLAS® tube as its main element, it has three Ø 38 mm pipes.

The tubes has swiveling eyes at its ends.
0.38 m hooks are used in mountings with single or double anchor strings, while with the 0.79 m hook is used to remove quadruple lower anchor strings.

The insulator plate has dual use: on one side fits insulators up to Ø 279 mm; and, on the opposite side, it adapts to insulators up to Ø 324 mm.

In conjunction with the cradle, tie rods are provided for coupling to the boom pole, a plate for retaining the upper insulator, hook arrangements, and metal spacers.

EHV SIDE-OPENING INSULATOR CRADLES

Catalog Reference	Description	Rated Work Capacity		Approx.  Weight.
		daN	lb	kg	lb
RC401-0354	Long insulating cradle of 4.83 m , 4 long support hooks of 0.38 m, 2 metal spacers and 1 plate	454	1000	66,00	136,69
RC401-0355	Long insulating cradle of 4.83 m , 4 long support hooks of 0.79 m, 2 metal spacers and 1 plate			64,00	141,10
RC401-0356	Long insulating cradle of 3.91 m , 4 long support hooks of 0.38 m, 2 metal spacers and 1 plate			58,50	128,97
RC401-0357	Long insulating cradle of 3.91 m , 4 long support hooks of 0.79 m, 2 metal spacers and 1 plate			60,50	133,38
RC401-0358	Long insulating cradle of 2.69 m , 3 long hooks of 0.38 m  and 1 plate	227	500	42,60	93,92
RC401-0359	Long insulating cradle of 2.69 m , 3 long hooks of 0.79 m  and 1 plate			44,00	97,00

 

 

SPARE PARTS AND COMPONENTS

Item	Catalog Reference	Description	Approx. Weight
			kg	lb
1	FLV01852-1	Cradle tie rod support	11,15	2,54
2	RC401-0361	Cradle support hook with ® Ø 51 x 390 mm RITZGLAS®	4,50	9,92
	RC401-0362	Cradle support hook with ® Ø 51 x 810 mm RITZGLAS®	5,70	12,55
3	FLV03460-1	Cradle metal spacer	2,60	5,73
4	RC401-0455	Insulator plate	3,15	6,95
5	RE402-0138	Ø 64 mm clamp for rod	0,80	1,75
6	FLV18595-1	Ø 64 X 4830 mm (insulated) RITZGLAS® tube with plastic terminal and eye head	8,80	19,40
	FLV18595-2	Ø 64 X 3890 mm (insulated) RITZGLAS® tube with plastic terminal and eye head	7,45	16,42
	FLV18595-3	Ø 64 X 2675 mm (insulated) RITZGLAS® tube with plastic terminal and eye head	5,40	11,90
7	FLV18594-1	Ø 38 X 4835 mm (insulated) RITZGLAS® tube with plastic terminal and eye head	4,50	9,92
	FLV18594-2	Ø 38 X 3920 mm (insulated) RITZGLAS® tube with plastic terminal and eye head	3,60	7,94
	FLV18594-3	Ø 38 X 2705 mm (insulated) RITZGLAS® tube with plastic terminal and eye head	2,60	5,75
8	FLV18593-1	Ø 38 X 4874 mm RITZGLAS® tube with plastic terminal	3,90	8,60
	FLV18593-2	Ø 38 X 3954 mm RITZGLAS® tube with plastic terminal	2,95	6,50
	FLV18593-3	Ø 38 X 2734 mm RITZGLAS® tube with plastic terminal	2,20	4,85
9	FLV03457-2	Ø 38 x 349 mm (insulated length) RITZGLAS® pole with tie-down head (clevis type) and eye head	2,15	4,74
	FLV03457-3	Ø 38 x 806 mm (insulated length) RITZGLAS® pole with tie-down head (clevis type) and eye head	2,50	5,52
	FLV03457-5	Ø 38 x 1263 mm (insulated length) RITZGLAS® pole with tie-down head (clevis type) and eye head	2,85	6,28
	FLV03457-6	Ø 38 x 1416 mm (insulated length) RITZGLAS® pole with tie-down head (clevis type) and eye head	3,00	6,61