Tenders for Supply of Electro Magnetic Contactor Complete Assly., Type 291-01, 80 Amps. Rating With Auxiliary Switches 2 No. + 1 Nc, As Per Clw Drg.No.1 Twd-291-033 Alt-9, Arrangement A And To Specn. No.4Tts-291-001 Alt.8 Suitable For Built Electric Locos.