See also: Electric multiple unit (Queensland Rail) and Suburban multiple unit
Interurban multiple unit
IMU 184 approaching Murrumba Downs station
Interior of an IMU 160
Manufacturer
Walkers Limited (100 and 120)
Downer EDI Rail/Bombardier (160)
Built at
Maryborough
Constructed
1996–1997 (100)
2001–2002 (120)
2007–2011 (160)
Number built
30 carriages (100)
12 carriages (120)
84 carriages (160)
Formation
3-car sets
Fleet numbers
101-110 (100)
121-124 (120)
161-188 (160)
Operators
Queensland Rail
Specifications
Train length
72.40 m (237 ft 6 in) (100 & 120)
72.42 m (237 ft 7 in) (160)[1]
Car length
24.21 m (79 ft 5 in) (160 - end cars)
24.00 m (78 ft 9 in) (160 - intermediate cars)[1]
Width
2.7 m (8 ft 10 in)
Height
3.9 m (12 ft 10 in)
Maximum speed
140 km/h (87 mph) (100 & 120)
130 km/h (81 mph) (160)
Weight
131.8 t (129.7 long tons; 145.3 short tons) (100)
130.4 t (128.3 long tons; 143.7 short tons) (120)
128.2 t (126.2 long tons; 141.3 short tons) (160)
Traction system
100: ABB MICAS-S2 GTO-VVVF[2]
120 and 160: Bombardier MITRAC IGBT-VVVF
Traction motors
8 × 180 kW (240 hp) 3-phase AC induction motor
Power output
1.44 MW (1,930 hp)
Electric system(s)
25 kV 50 Hz AC (nominal) from overhead catenary
Current collector(s)
Pantograph
UIC classification
Bo′Bo′+Bo′Bo′+2′2′ (100)
Bo′Bo′+2′2′+Bo′Bo′ (120/160)
Braking system(s)
Mix of electro-pneumatic and regenerative braking
Coupling system
Scharfenberg Type 10
Multiple working
Within type
With SMU260 (160 only)
Track gauge
1,067 mm (3 ft 6 in)
The Interurban multiple units (IMU) are a class of electric multiple units manufactured by Walkers Limited/Downer EDI Rail, Maryborough for Queensland Rail's Citytrain division between 1996 and 2011. The IMU is divided into in three subclasses, units 101-110 as the 100 series, units 121-124 as the 120 series, and units 161-188, as the 160 series.
^ ab"Electric Multiple Unit - Brisbane, Australia". Bombardier. Archived from the original on 13 January 2018. Retrieved 21 July 2022.
^"MICAS-S2 distributed traction control for motive power units" (PDF). ABB. May 1995. Archived (PDF) from the original on 31 January 2023. Retrieved 31 January 2023. SMU+IMU
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