NCR 9100 series

The E501 series (E501系) is an AC/DC dual-voltage (1,500 V DC / 20 kV AC 50 Hz) electric multiple unit (EMU) train type operated on local services by Narita Canton Public transit - Narita Canton Railway (NCPT-NCR) in Republic of Numbo since November 1994.

Design
Built jointly by Kawasaki Heavy Industries and Tokyu Car the design is derived from the 209 series commuter EMU, and were initially operated as 10/12-car formations on Suburami Line services out of Sadara in Numbo, but were modified with the addition of toilets and transferred to Port Line and City Central local services in the Hinta area from March 2007.

9100 series used to have Siemens GTO-VVVF when delivered that were similar to pre-refurbished Keikyu 2100 series. Currently, all trains had retrofitted with Alstom Onix 800 IGBT-VVVF/Bombardier MITRAC IGBT-VVVF.

Formations
As of 1 April 2014, the fleet consists of four 10-car sets, numbered 9101 to 9150, and four 12-car sets, numbered 9151 to 9154. All are based at Depok Dasha Depot, and are formed as shown below with car 1 at the southern end.

10-car sets (9101- 9150)
The fifty 10-car sets are formed as shown below, with four motored ("M") cars and six unpowered trailer ("T") cars.

5-car sets (9151 - 9154)
The four 5-car sets are formed as shown below, with two motored ("M") cars and three unpowered trailer ("T") cars.