info about WAM-1
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Early 2800 hp SNCF design for 25kV AC, with ignitron rectifiers. Introduced in 1959, they were mostly deployed by ER in the Howrah-Asansol-Dhanbad-Mughalsarai section. They were less frequently found 'upstream' in the Delhi-Kanpur-Mughalsarai section, and in the Igatpuri-Bhusaval section of the Central Railway. Mostly used for non-express passenger trains, but some were used double-headed for freight service. Some were still [12/98] in operation on ER (Sealdah-Lalgola passenger, etc.).
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WAM-1's are significant in the history of electric traction in India as they were among the first AC electrics to run in India. Like the WAG-1's, some of their advanced features turned out to be unsuitable for Indian conditions.
Manufactured by Kraus-Maffei, Krupp, SFAC, La Brugeoise & Nivelle (50 cycles European group). Ignitron rectifiers feeding four DC traction motors accepting pulsating current input. Motors are connected to the axles by a Jacquemin drive. Speed control by tap-changer on input transformer (motors permanently wired in parallel). Superstructure mounted on bogies with pendular suspension with equalizer beams. Electricals from ACEC, AEG, Alstom, Brown Boveri, Siemens and others. B-B (monomotor bogies). Jeumont transformer (20 taps), Oerlikon exhauster, Arno rotary converter. Air loco brakes, vacuum train brakes.
Manufacturers: Kraus-Maffei, Krupp, SFAC, La Brugeoise & Nivelle (50 cycles European group)
Traction Motors: Siemens/ACEC/Alstom MG 710A (740hp, 1250V, 480A, 1000 rpm, weight 2750kg). Fully suspended, force-ventilated.
Rectifiers: Four water-cooled ignitrons from SGT, each rated for 575kW / 1250V.
Pantographs: Two Faiveley AM-12.