Anno 1870
November 27: Factory foundation day

1894
In the Main Revel railway workshops, the construction of a special imperial train was completed

1919 - 1922
32 broad-gauge and 12 narrow-gauge steam locomotives were repaired

1924
First Baltic electric train production

1928
In 1928, electric trams were built for Tallinn, which were in use until 1965.

1945
Tallinn steam-engine repair plant is founded on Main railway workshop base

1958
The enterprise is renamed into the Plant of mercury rectifiers named after. M.I. Kalinin. Founding of a scientific base for the industry of the republic.

1959
Release of the first mercury-rectifier unit for an electric locomotive, ignitron IVS-300/5

1961
Created a Special Design Bureau for the development and production of power semiconductor devices

1965
Serial production of power semiconductor devices and converting units based on them has begun

1967
Due to changes in the production profile, the company was named: Tallinn Electrotechnical Plant named after M.I. Kalinin

1968
For the first time in the USSR, a thyristor frequency converter for electrothermia was developed and produced

1970
On the occasion of its 100th anniversary, the plant was awarded the Order of the Red Banner of Labor

1970
Manufacturing of power semiconductor devices for the first Soviet Lunar rover

1972
Development and start of production of converters for high-voltage electric motors

1974
Development and production of the first converters for ground handling of aircraft

1981
Registration of the "Estel" trademark.

1990
Participation in the project for the supply of equipment for CERN (European Organization for Nuclear Research).

1999
Winning an international tender. Development of an SMES modulator for the Karlsruhe Research Center (Germany)

2001
The quality management system of the enterprise is accredited according to the international standard ISO 9001: 2001

2007
The construction of a new modern plant has been completed

2012
Renaming of the company to Tallinna Elektrotehnika Tehas "Estel" AS (AS Tallinn Electrotechnical Plant "Estel")

2014
The industrial safety management system is certified according to the international standard OHSAS 18001

2014
Supply of VIU (Rectifier-Inverter Devices) to the Novocherkassk Electric Locomotive Plant (NEVZ) for the world`s most powerful electric locomotive - 4ES5K "Ermak"

2018
Development and launch of Hybrid diesel power units.

2020
The company was awarded with an AAA rating, the highest in the credit rating classification.

2021
Delivery of unique 82kA / 70V power supply equipment for Titanium vacuum electro slag remelting line in Yunnan, China.