EURO-ECO 2007 Hanover 4 - 5 December 2007	Environmental and Engineering Aspects for sustainable living
	European Academy of Natural Sciences, Hanover European Scientific Society, Hanover Russian Academy of Natural Sciences, Moscow

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Shalaginov A.A.

The aim of the present study is the investigation of means for improving transient resistance of electrical contacts to improve reliability, simplify operation of the service personnel, and decrease fire safety of electrical equipment at industrial enterprises.

In compliance with the data currently provided by the Fire Safety Research Institute (VNIIPO), 50% of inflammability cases at industrial facilities result from faulty electrical installations. Half of the fires on electrical installations are associated with faults of electrical contacts. Suffice it to say, two largest fires – that of Ostankino television tower in Moscow and Vasilyevskiy Island substation in St. Petersburg – are to a large extent connected to failure of electrical contacts. Interruption of power supply in a number of districts in Moscow is substantially resulting from poor condition of contact connections. In this regard, the task described above is especially crucial today.

The following means for improving transient resistance for fixed and movable electrical contacts are provided by our company:

1. Conductive pastes and lubricants (super conductive lubricant SCL);

2. Composite liquid-metal contacts (CLMC) based on gallium alloy;

3. Specialized pressure arrangements and specialized hold-down nuts;

4. Conductor materials and alloys of the following types: AD, AD0, AD1, AD31T, etc.;

5. 5. Welded and semiwelded contact connections;

6. Various types of solder: Hot-dip coating of solder POTS-80 with ultrasound, for solder A

7. Various types of metal coatings: Galvanization, cadmium plating, nickel plating, etc.

8. Various types of contact connections: Hard, flexible, and combined.

9. Use of simplified and reliable means for connecting electrical installations.

These means for improving transient resistance as separate measures, as well as those applied in groups may significantly improve transient resistance and, thus, increase reliability of operation of electrical contacts, simplify operation of service personnel, decrease risks of fire for the electrical equipment at industrial enterprises.