Arrow line a.s. - Railway equipment, pyrolysis

Railway tractor KT 37

Is a shunting mechanism with 2 axles with electric power transmission and fulfils all conditions for operation on rails in connection with the operation of other rail vehicles. The vehicle was created through complex conversion of a series locomotive T 211 (700).

Construction

The drive, the main frame of the vehicle with pulling and retarding devices, axle gears, and a parts of the vehicle are used for reconstruction from the original locomotives. All other parts are treated as a new construction. The propulsion system is located in the front hood. The primary source of energy may be lead-acid batteries (KT 37A) to ensure normal dual operation or a diesel engine (KT 37d) supplying power to electronics - traction inverter. The vehicle is mounted with an electro-dynamic brake.

Advantages

The technical parameters guarantee extremely favourable economic indicators, and an optimal return on investment funds (min. cost of vehicle operation and maintenance, quality assurance, quality and durability of components, environmental service). The vehicle meets strict safety and fire prevention requirements.

Management

With radio remote control (the operator from the work place or from the platform of machines). In the event of loss of radio communication immediately activates TOTAL STOP functions and activates the emergency brake. As part of the security of operation of the vehicle it is protected against the uncontrolled return of the working area through security electromagnetic sensors.

KT 37A

As a source of electricity for traction inverter lead-acid batteries of nominal voltage of 572 and 330 Ah capacity are used, which is adapted for traction purposes and 4 blocks are safe in the event of an impact with another vehicle.
A lead traction battery is very hard source of electrical energy, which allows short-term supply many times the nominal current. An appropriate combination of the right sized inverter is then possible to fully exploit the properties of asynchronous motor traction able to operate at the border of relative traction torque even at very low revolutions. These properties can not be fully used in DC traction current applications.
Before the dangers of a deep discharge battery is secured with electronic traction facilities which, on the basis of voltage drop in the load balances evaluate energy accumulation.

KT 37D

The source of electrical Energy is supplied by a traction diesel generator AC 400 V, which is brought through the fuses and circuit breakers to traction frequency. Here it is guided for intermediate voltage, and subsequently brought into the inverter.
The traction inverter with full vector control manages speed and torque of the traction motor. The drive consists of an asynchronous electric motor with a short anchor of the output of 37 kW. The source current for the traction power electronics is an intercooled turbocharged diesel four cylinder.

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A vehicleis the result of an extensive restructuring and modernization of a diesel hydraulic locomotives series 710 (T334) by CKD Lokomotivka np Prague, where the original frame and chassis is maintained.

Construction

The lokomotive consists of a basic frame on which are located 2 forestops (front and rear bonnet) and a centrally located tower cab for the operator. It can also be controlled by radio command set. The necessary qualifications for operation by driver are engineer qualifications. The main service brake accumulator is a locomotive electro-dynamic brake (EDB). Current generated by the electric motor comes into traction inverters - rectifiers and then back to the battery when there is the phenomenon of recuperation.

Advantages

The major advantages of this locomotive are of the environment for operation, a very significant reduction in operating costs (fuel costs, charges, and maintenance), low noise, easy operation and favourable cost.