# KTM Class 83

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.
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 makes the KTM class 83 have 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, 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 T8302 C8302 In Service EMU 20 C8303 T8301 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.
On 4 September 2020, EMU29 was side-swiped by KTM Class 93 near Kuang Komuter station, Selangor. No fatalities report.