1992. Where it all began - the first development and the first serial cathodic protection rectifiers UKZ-1. The simplest scheme with stepwise regulation of output parameters. Well, even in these rectifiers, there were unique technical solutions - the control scheme allowed regulation from 1% of the nominal voltage and the principle of modular design was applied for the first time.

1994. At a specialized exhibition in Kazan, a pre-production model of the UKZT cathodic protection rectifier with smooth adjustment of parameters was presented for the first time, which became a distant ancestor of the modern CP TRs series "Don"

1997. For the first time, the possibility of remote control and management of the parameters of cathodic protection stations via a radio channel was implemented. Pilot facilities operated on the basis of the Rostov UMG of JSC Mostransgaz

2000 год. В рамках договора о сотрудничестве и партнерстве, по технической документации ООО НПП Дон, запущено производство оборудования ЭХЗ на базе электромеханического завода ОАО "Донская корона"

October 2002. Launch of the first UKZT-AS "Squazhina" cathodic protection rectifier for corrosion protection of oil well casings at the facilities of JSC "Tatneft"

2005 First attempt at work - installation of a pilot telemetry system via GSM communication channels, a prototype of the future STM "STEL-K", at cathodic protection rectifiers of the "Don" series. Perm, facilities of JSC "Permtransgaz"

2006, Ocher Perm region. The first training seminar on the use of the telemetry system of the cathodic protection rectifiers "STEL-K" for specialists of the CP service of JSC "Permtransgaz"

2007, Installation of pre-production samples of "KATRON" control controllers in automatic cathodic protection rectifiers UKZT, operated at the facilities of JSC "Orenburggorgaz"

2008. Launch of serial production and start of industrial operation of Don-TM cathodic protection rectifiers with an integrated KATRON telemetry controller on gas distribution networks in the regions of Russia.

2008. Thanks to the launch of the Don rectifiers with telemetry functions, the technology of energy saving and optimization of the operating modes of the cathodic protection system was implemented and tested on the basis of the ARM ECP-PP complex adapted for gas distribution networks on the city networks of JSC Azovmezhraygaz in the regions of Russia.

In 2009, a positive conclusion was received on the assessment of the efficiency of the CP rectifiers "Don" from the testing laboratory of "Gazregionzashchita" LLC. Specialists of SPE "Don" regularly participated in the work of training seminars held by "Gazregionzashchita" LLC, ​​introducing specialists of operating organizations to new equipment and technical solutions for organizing accident-free operation on site.

2010. For the first time, the KATRON controller was installed on a third-party cathodic protection rectifier, as the main control and telemechanics unit with the realization of functions for remote monitoring and control of the parameters of the cathodic protection rectifier via GSM communication channels in the Izobilnensky LPU MG of Kaukaztransgaz LLC.

2011, Karachay-Cherkess Republic. Mobile teams of SPE "Don" perform work on installing KATRON controllers at operating stations of various manufacturers and connecting them to the ECP telemetry system in the regions of Russia in a field conditions.

"RosGazExpo-2011" St. Petersburg. The company regularly takes part in industry exhibitions, demonstrating the achievements of its production and new equipment.

2012, the company certifies the manufactured cathodic protection stations in the VCS "Gazcert", to confirm of the products to the requirements of JSC "Gazpromregiongaz"

2013, the company presented its products for the first time at the foreign exhibition OMC-2013 (Ravenna, Italy). Following the exhibition, a distribution agreement was signed with FM-Engineering srl to represent the interests of SPE "Don" in the countries of the European Union.

2013. At the request of specialists from JSC Tatneft, a multi-channel cathodic protection rectifier (5 channels of 0.6 kW) was developed and transferred to trial operation on the basis of a transformer source, with the ability to independently regulate the protective current for each channel and automatic stabilization functions.

2014. The mobile teams of SPE Don continue to carry out work on equipping the operating cathodic protection rectifiers with KATRON-SKZ control controllers and connecting them to the telemetry system via GSM/GPRS communication channels.

2015. Don cathodic protection stations and KATRON control controllers successfully passed tests and were certified in VCS Gazpromcert

2016. Work was carried out on hardware and software coupling of Don-TM cathodic protection rectifiers with SCADA-ANT upper-level software

2016. The organization standard developed by SPE "Don" was approved and put into effect STO GAZPROM GAZORASPREDELENIE 9.2-3-2016

2020. Successful software coupling of the Don cathodic protection rectifiers with the Telemetry Server software package (ServiceSoft LLC) was completed

2020. SPE Don Ltd received an invitation and, in January 2021, became a full member of the Association of Gas Equipment Manufacturers.

At the SPIGF-2021 in St. Petersburg, a prototype of a block cathodic protection rectifier based on high-frequency converters was presented.

In the spring of 2023, SPE Don launched the process of transferring the production of CP equipment to its own production base.

2023. SPE "Don" received an offer and joined the holding of a group of manufacturing companies headed by LLC "BSN-GROUP", becoming a member of a strong team of professionals.

Beginning of 2024. High energy efficiency indicators of the CP rectifiers "Don", in a wide range of loads, are confirmed by a test report from an independent laboratory of the Rostov CSM, thereby breaking established stereotypes about the characteristics of transformer power supplies.

2024. NPP "Don" once again confirmed the quality and compliance of its products with the requirements of the anchor customer by receiving VCS "GAZCERT" certificates for the cathodic protection rectifiers "Don" and controllers "KATRON-SKZ"

2024. As part of the SPIGF-2024, SPE "Don" presented modern models of equipment at the corporate stand of the holding "BSN-GROUP"