The Type KZ8A freight electric locomotives
The two-section Type KZ8A is designed for freight operations, hauling trailing loads of up to 9,000 tonnes. It has asynchronous traction motors, a power rating of 8,800 kW, a Bo'Bo'+Bo'Bo' axle arrangement, and is designed for operation off 25 kV AC 50 Hz electrification systems, on the 1,520 mm gauge network.
For the first time on a locomotive built for use in Kazakhstan, the KZ8A is equipped with an automatic eco-driving system. This protects the driver from making mistakes through human error, and also ensures that the power and brake applications are made at the most appropriate times to save energy consumption.
Multiple operation is possible with other KZ8A sections. This enables all sections to be controlled by the driver, from one cab. The driving console thus displays on high resolution coloured screens all the operational and diagnostic characteristics of the other locomotive sections coupled in the formation. The locomotive control system also realises self-diagnoses of systems, and immediately reports any defects or failures to the driver via the console displays. Should a problem be reported, the driver is able to adjust the operating regime to one of the stand-by systems, via the controls on the driving console, and maintain the same speed of the train.
The locomotive crew has the safest and most comfortable working environment possible. The cabs are equipped with air conditioning, heating, comfortable and ergonomic upholstered driving seats, together with a refrigerator and microwave. Personal needs are not forgotten – a fully-equipped WC cubicle is also provided on board the locomotive.
The Type KZ8A Electric Locomotive: Principal Technical Data
Type of service | Freight |
Axle configuration | Bo'Bo'+ Bo'Bo' |
Bodyshell | Steel |
Track gauge | 1,520 mm |
Loading gauge | compliance GOST 9238-83 1-Т |
Overall length | 2 х 17,500 mm |
Height | 5,290 mm |
Weight in working order with sand boxes 2/3 full | 2 x 100 tonnes |
Axle-load | 25 tonnes |
Ambient temperature range | -50ºC to +40ºC |
Bogies | |
Traction motors | Three-phase, asynchronous, suspended from axles |
Wheel diameter | 1,250 mm |
Automatic couplings: | |
Type | СА-3, in compliance with GOST 21447 |
Absorption of impact energy | 35 kJ |
Automatic train protection (ATP) system | |
Type | KLUB-U |
Technical data | |
One-hour power rating at shaft | 8,800 kW |
Electrification system | 25 kV AC 50 Hz |
Maximum speed | 120 km/h |
Speed at continuous power rating | 50 km/h |
Starting tractive effort | 833 kN |
Regenerative braking | 7 600 kW |
Maximum braking force | 500 kN |
Electric traction motors | |
Type asynchronous | AC |
IGBT | 3.3 kV / 1,200 A |
DC bus line | 1800 V |
Cooling | Air |
On-board sub-systems | |
Supply voltage for on-board systems | 400 V AC 50 Hz |
Accumulator batteries: | |
Type | Nickel-Cadmium |
Voltage | 110 V |
Volume | 130 Аh |
