Class 83
A Class 83 EMU Komuter train.
In service	1996–present
Manufacturer	Hyundai Precision and Marubeni
Refurbished	Woojin Industrial Systems (2018–) [1]
Number built	66 cars (22 sets)
Number scrapped	24 cars (8 sets)
Formation	3 per trainset
Capacity	406 (216 seats)
Operators	Keretapi Tanah Melayu
Depots	Batu Gajah Rail Depot Sentul Komuter Depot
Lines served	Padang Besar Line Padang Rengas Line Skypark Link Port Klang Line (backup trainset) Seremban Line (backup trainset)
Specifications
Car body construction	Stainless steel
Train length	68.4 m (224 ft 5 in)
Car length	22.2 m (72 ft 10 in) (end cars) 23.2 m (76 ft 1 in) (intermediate cars)
Width	2.75 m (9 ft 0 in)
Height	3,855 mm (12 ft 7.8 in)
Floor height	1.1 m (3 ft 7 in)
Doors	3 double-leaf pneumatic sliding doors per side
Maximum speed	160 km/h (99 mph) (design) 120 km/h (75 mph) (service)
Weight	123 t (121 long tons; 136 short tons)
Traction system	Mitsubishi Electric GTO– VVVF
Traction motors	8 × Mitsubishi Electric MB-5069-A 150 kW (200 hp) 3-phase AC induction motor [2]
Power output	1,200 kW (1,600 hp)
Electric system(s)	25 kV 50 Hz AC overhead catenary
Current collector(s)	Brecknell Willis pantograph
UIC classification	Bo′Bo′+2′2′+Bo′Bo′
Braking system(s)	single-pipe regenerative braking system
Track gauge	1,000 mm (3 ft 3+3⁄8 in) metre gauge

The Class 83 is a type of electric multiple unit operated by Keretapi Tanah Melayu on its KTM Komuter services. 22 sets were built by Hyundai Precision and Marubeni of South Korea and Japan respectively, in 3-car formations. ^[3]

The KTM class 83 3-car formation consists of two motor cabs at either end of the set and a single trailer car in between, the trailer car in between is equipped with a Brecknell Willis pantograph for electric pick up. Narrow gangways integrate the 3-car sets. Each car features 3 double-leaf pneumatic sliding doors at either side which is the KTM class 83 the highest density of doors per rail-car in Malaysia.

Over the years, the KTM class 83 has been overhauled a number of times and its interior refurbished, however its interior layout, of longitudinal seating, has remained the same throughout it service life. However, four sets of class 83 has been refurbished for the KTM Skypark Link. The colour also changed from blue and yellow to orange and grey colour.

With the withdrawal of Adtranz/Walkers EMU for the Ampang Line, the KTM Class 83 is now the second oldest electric multiple unit in Malaysia after KTM Class 81.

Design

The class 83 was designed with a streamlined sloped head with a large as per the front windows with two high beam lamps concentrated at the center top part of the cavity with two standard headlights at either bottom sides, later changed to LED lights in 2016. An AAR coupling system is used, and this is compatible with all of KTMB's modern rolling stock. Route direction is indicated on the top-right front of the train within a confined fluorescent lighted box using a lightly transparent plastic which is built integrated with the window shell, later replaced with LED destination indicator's in 2010. The drivers cab features a dedicated access to outside on top of the door access to the passenger area. The class 83 cab head is designed to be bottom heavy with the bulk of the power transformers located beneath the coach with full use of the top for passenger use, power traction motors are contained within the bogie itself. In terms of safety, the front outer frame is made of heavy carbonized steel, that is capable of sustaining high impact, same as KTM Class 82.

Unlike the latter class 92, ^[4] the class 83 like its sister classes are endowed with multi-layered tempered glass that is of a higher degree of impact resistance.

The class 83 has a top speed of 140 km/h (87 mph), at the time of launch this was similar to the top speed of the other classes but significantly faster than the railbuses that were in use at the time. During normal operation, 120 km/h (75 mph) was the typical top speed with the average speed being around 45 km/h (28 mph). Compared to the other classes, the class 83 was found to have the best acceleration among the 8x classes, and this is due to the Mitsubishi regenerative braking system being used which gave efficient energy conservation during braking and reasonable acceleration during runs.

Formations

Set Designation	Car Number			Status
	Car 1	Car 2	Car 3
EMU 19	C8301	T8301	C8302	In Service
EMU 20	C8303	T8302	C8304	Scrapped
EMU 21	C8305	T8303	C8306	Scrapped
EMU 22	C8307	T8304	C8308	In Service
EMU 23	C8309	T8305	C8310	In Service
EMU 24	C8311	T8306	C8312	In Service
EMU 25	C8313	T8307	C8314	In Service
EMU 26	C8315	T8308	C8316	In Service
EMU 27	C8317	T8309	C8318	Scrapped
EMU 28	C8319	T8310	C8320	In Service
EMU 29	C8321	T8311	C8322	In Service
EMU 30	C8323	T8312	C8324	In Service
EMU 31	C8325	T8313	C8326	In Service
EMU 32	C8327	T8314	C8328	In Service
EMU 33	C8329	T8315	C8330	In Service
EMU 34	C8331	T8316	C8332	Scrapped
EMU 35	C8333	T8317	C8334	In Service
EMU 36	C8335	T8318	C8336	Scrapped
EMU 37	C8337	T8319	C8338	Scrapped
EMU 38	C8339	T8320	C8340	Scrapped
EMU 39	C8341	T8321	C8342	In Service
EMU 40	C8343	T8322	C8344	In Service

Accidents and incidents

On 1 November 2013, EMU19 derailed near Rawang station while moving through a track switch. No one was hurt in the incident. The two rear coaches were separated and towed away using a locomotive while the remaining front coach removed by use of cranes. ^[5]

References