Cotton cloth-based rods

The rods electrotechnical round are items of round section made by winding of a cotton fabric, impregnated thermosetting resin with the subsequent molding in express moulds. The permissible operating temperature from -65 up to 120 С in insulating oil and on air is long-term. Production of rodsup to 1 m now accustoms

Conformity to standards

GОSТ 5385-74

DIN 7735

Нgw 2088, 2089

Technical parameters

		Rods
Parameters	Test conditions	Typical values, for diameters of rods
Parameters	Test conditions	8	13	18	25	40-60
Density, kg/m3		1,25-1,4	1,28-1,4	1,25-1,38	1,25-1,38	1,25-1,38
Breaking stress at static bending , MPa					120	100
Breaking stress at alongation, not less than		90	80	50	50	40
Surface Resistivity (Ohms), not less than			1,0·10¹⁰	1,0·10¹⁰	5·10⁹	5·10⁹
heat chock stability		130	130	130	130	130
transformer oil resisrance during 4 h		120	120	120	120	120
transformer oil resisrance , h	105 С	4
water absorbing, mg	D 24/20	0,9	0,9	1	1	1
Breakdown volyege parallel to lamination (1 min)	M 20		12	11	11	10
Internal electrical resistance			1,0·10⁹	1,0·10⁸	1·10⁸	1·10⁸

Application

The rods are applied as a constructional material.