About Us
M/s. Involute Engineers & Industries (M/s. IEI) has been engaged in manufacture and indigenous development of Electro-mechanical & Electro-pneumatic equipment for Railway transportation, since its inception in 1984. Major thrust of its activity has been the import substitution in above mentioned field.

M/s. Involute has rendered a considerable and meaningful contribution by indigenously developing among others a variety of critical spares & sub-assemblies for N-32 Tap Changer. N-32 Tap Changer is a vital equipment in A/c Electric Locomotive. IEI has been a major supplier of railway components to M/s. Adtranz, Baroda (formerly M/s. Asea Brown Boveri Ltd.) and OEM for N-32 Tap Changer. Presently, M/s. IEI caters to the maintenance demand for Tap Changer & Circuit Breaker spares to all the Electric Loco Sheds in India under various Zonal Railways.

In 1995, M/s. BHEL had entrusted M/s. IEI to develop and supply complete SMSC i.e. an equipment also known as D.C. Controller for fitting in WCAM2, WCAM3 & WCAG1 Electric Locomotives (AC/DC) within a limited time frame. These equipments were earlier being imported from Switzerland. IEI met the challenge successfully. Presently, 170 pieces of such equipments are  functioning satisfactorily in Mumbai area under Western & Central Railways. We Have also developed Eddy Current Clutches suitable for application in 3100/3300 HP Diesel Electric locomotives for DLW/Varanasi.

Our Promoter
Involute Engineers & Industries has been promoted by Sri Mrityunjoy Hazra, a Post Graduate Mechanical Engineer, with training abroad under Confederation of British Industries Overseas Scholership (UK).

Quality

IEI is an ISO-9000:2001 certified concern. We have been approved by Research Designs & Standards Organization, Lucknow - Ministry of Railways as regular source for manufacture & supply of the above Locomotive items.

Our Customers

Eastern Railway, Fairlie Place, Kolkata - 700001

South Eastern Railway, Garden Reach, Kolkata - 700043

Central Railway, C.S.T. Mumbai - 400001

Western Railway, Church Gate, Mumbai - 400020

Southern Railway, Park Town, Chennai - 600003

South Central Railway, Rail Nilayam, Secunderabad-500071

Northern Railway, Baroda House, New Delhi - 110001

Metro Railway, Metro Rail Bhawan, 33/1 Chowringhee Road, Kolkata - 700071

Bharat Heavy Electricals Ltd., P.O.- BHEL, Jhansi - 284129

Bharat Heavy Electricals Ltd., Piplani, Bhopal- 462022

Bombardier Transportation India Ltd., Maneja, Vadodara - 390013

Disel Locomotive Works, Varanasi