25KV Composite Insulators

We are an outstanding enterprise successfully committed in manufacturing and supplying excellent grade 25KV Composite Insulators for Railways in 9 Tonne, Stay arm hook & Bracket tube configurations. These units are manufactured under I EC 61109 & RDSO specifications TUSPC/OHE/INSCOM/1070 using supreme grade Polymeric/Silicone Rubber. Perfect to be connected to main electrical wires, the offered units ensure excellent protection from surges and short-circuit. In addition to this, our clients can purchase this 25KV Composite Insulators at highly competitive prices from us. 

• The external sheds are moulded from Silicone rubber on the latest state of the art injection moulding machinery from Desma Germany.
• The end fittings are made up of malleable cast iron BM:350 of IS 14329 or SG cast iron conforming to grade 400/151 of IS 1865 iron and are duly Hot dip galvanized to a min of 750-10009/m2as per RDSO specifications.
• The fittings are crimped on microprocessor controlled automatic hydraulic crimping machines. Creepage distance offered is 1050 mm i.e. 20 mm/kV suitable for medium polluted areas.

• The core is made up of fiber glass rod which is a insulating part of the composite insulator which ensures all the necessary mechanical characteristics. The FRP rod is one of core material which is manufactured by protrusion process using boron free ECR grade glass fiber haying required mechanical & electrical characteristics.

• It has RDSO certification from Indian railways. They are also tested duly witnessed by RDSO engineer at our works. Further, the composite insulators have been extensively type tested as per the IEC/IS/RDSO specifications.

• We have all the requisite infrastructure to carry out routine tests on the insulators as per the international/national standards such as Dry power frequency voltage test, Mechanical Tensile test, Thermo mechanical test chamber, U.V. weathering Rubber tensile test etc as per IEC 61109.

Technical specification

Catalog No.	Units	IR259T1050-7	IR25BT1050-7	IR25STH1050-7
Sectional Length	mm	315	315	315
Voltage Rating	kv	25	25	25
Material		Silicon Rubber	Silicon Rubber	Silicon Rubber
Wetpower Frequency withstand	Insulator vertical	100	100	100
Voltage (kV-rms)	Insulator Horizontal	125	125	125
Dry lightening impulse withstand	POS	240	240	240
Voltage (kV-peak)	Negative	260	260	260
Min. Mechanical Failing Load	Kgf	11000	7000	7000
Bending Moment	Kgf	210	200	200
Minimum Creepage Distance	Min.	1050	1050	1050
Type of end fittings		9 tonne	Bracket Tube	Stay Arm