TRTA 3000 series

TRTA 3000 series
TRTA 3000 series set 3021 on the Tobu Isesaki Line in 1988
In service	1961–July 1994
Constructed	1960–1970
Number built	304 vehicles (38 sets)
Formation	2/4/6/8 cars per trainset
Fleet numbers	3001–3574
Operator(s)	TRTA
Line(s) served	TRTA Hibiya Line, Tokyu Toyoko Line, Tobu Isesaki Line
Specifications
Car body construction	Stainless steel
Car length	18,000 mm (59 ft 1 in)
Width	2,790 mm (9 ft 2 in)
Height	3,995 mm (13 ft 1.3 in)
Doors	3 pairs per side
Maximum speed	100 km/h (60 mph)
Acceleration	4.0 km/h/s
Deceleration	4.0 km/h/s (service) 5.0 km/h/s (emergency)
Electric system(s)	1,500 V DC
Current collection method	Overhead catenary
Safety system(s)	Tobu ATS, Tokyu ATS, WS-ATC (ATO)
Track gauge	1,067 mm (3 ft 6 in)

The TRTA 3000 series (営団3000系, Eidan 3000-kei^?) was an electric multiple unit (EMU) train type operated by TRTA (present-day Tokyo Metro) on the then TRTA Hibiya Line from 1961 to 1994.

This train was fitted with safety systems compatible with the Tokyu Toyoko Line and Tobu Isesaki Line. This train was also compatible with driverless operation on the Hibiya Line section experimented starting from February 1962 by retrofitting car no. 3015 with autopilot equipment and was extended to the entire Hibiya Line by October 1970, with two additional cars, numbers 3057 and 3035 retrofitted with autopilot equipment in January and November 1963. The autopilot trials were stopped by 1987, and despite the autopilot equipment occupying a large space in these three cars these experiments subsequently became the basis of operating the Namboku Line in driverless mode. The 3000 series ran as full 8-car sets.

The first 3000 series trains were built as two-car sets, but the fleet was gradually lengthened to four-car, six-car, and finally eight-car formations, as shown below.

The Mc cars had small driving cabs for use in depot shunting.

The 3000 series trains were gradually phased out from 1988 following the introduction of new 03 series EMUs. The last sets ran in revenue service on 22 July 1994, with a special "sayonara" run for rail enthusiasts on the following day using set 3055, specially decorated in a "whale" colour scheme and carrying a "Sayonara 3000 series" headboard.

Some trains were sold to the Nagano Electric Railway where they operate as three-car sets reclassified as 3500 and 3600 series.

A Nagano Electric Railway 3500 series set in November 2010