Brief history of manufacture:

1992
- Development and start of manufacture of the first CP rectifiers with manual step adjustment of parameters UKZ-1.
1994
- Development and start of manufacture thiristors CP rectifiers with manual adjustment of parameters UKZT-1.
- Start of manufacture of diode-resistors blocks BDR-25.
1996
- Development and start of manufacture of automatic CP rectifiers UKZT-A
- Development and start of manufacture of automatic rectifier of electrodrainage protection UEDZ.
- Development and tests connection of CP rectifiers UKZT-A to systems of the telemetering control and management.
1997
- Development and the beginning of manufacture of the pipe finder complete set TIA-1000
- Development and start of manufacture of the capacity-inductive filter for CP rectifiers FPP-1
1998
- Development and start of manufacture of not polarized (copper-sulphate) permanent reference electrodes of comparison ESMS.
2000
- The beginning of manufacture of the nomenclature of the equipment on the electro-mechanical factory of JSC « Donskaya korona».
- Modernization of the pipe finder complete set TIA-1000.Is increased sensitivity the receiver in a mode of definition of places of damage of isolation;
2001
- Complex modernization of CP rectifiers of series UKZT. The design is changed and temperature characteristics of the power transformer are lowered, the circuit of protection from overloads, the design of the case and lock's mechanism is modified, protection of the electronic block of management is increased and its element base is modernized.
2003
- Development and start of manufacture of CP rectifiers "Don-U " (UKZT-1U, UKZT-AU).
- Development and start of manufacture of the automatic low power CP rectifier "Don-S".
2004
- The new design of smoothing filter FPP-1 that has made its more functional, and service of the filter - more convenient;
- The block of smooth start is included in a base complete set of all CP rectifiers "Don" and "Don-U".
To be continued...