APPLICATION OF LOW-VOLTAGE COMPACT STATIONS IN THE KAKANJ MINE
APPLICATION OF LOW-VOLTAGE COMPACT STATIONS IN THE KAKANJ MINE

Summary/Abstract: The low-voltage network has the task of providing a continuous, and from the aspect of implemented protective measures, safe supply of electricity to consumers installed on the complex mechanized wide front (KMŠČ) in the Kakanj Mine. Due to the size of the installed power of consumers at KMŠČ, as well as the cross-section of the power cables, the equipment supplier decided on two voltage levels: 1kV and 0,5 kV. For this, three dry pit transformer stations were installed. The transformer station JTS-1 supplies consumers with electricity at a voltage level of 1kV through the compact station W1. These are the pit harvester, produced by the German company “Eickhoff”, type SL 300 and the drive of the front rake with two electric motors of 132 kW each. The transformer station JTS2, through the compact station W2 and the transformer station JTS-3, through the compact station W3, supplies consumers with electricity at a voltage level of 0,5 kV. With JTS-2 and the associated compact station W2, electricity is supplied to drive the haul-off rake (PZP), with one 132 kW electric motor, the crusher with 90 kW electric motor and the water pump drive (wetting the space around the harvester’s cutting organ), with a 55 kW electric motor. The subject and goal of the research is the impact of the low-voltage network on the work of consumers in the Kakanj Mine, from the aspect of network stability and implemented protective measures. The results of the research prove to us that the low-voltage network positively and continuously provides power to consumers in the Kakanj mine pit, and especially to the complex of mechanized wide face (KMŠČ). The implications of the results of this work is that for optimality, individual units should share the load so that their marginal costs are equal as the implications of different state readings.

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