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Minimum Oil Circuit Breakers
(MOCBs)
In 1957, Jyoti pioneered manufacure of 3.3 - 36 kV MOCBs in
technical collaboration with Calor Emag, Germany. In 1967, 145 KV
MOCBs were introduced first time in India in technical
collaboration with Oerlikon Engg. Co., Switzerland. In 1973,
first indigenous 33 kV, 750 MVA outdoor MOCB was type-tested at
High Power Laboratory, Czehoslovakia. The Indoor MOCB (12 kV, 40
kA / 7.2 kV, 44 kA) was developed and tested at KEMA, the
Netherlands and Central Power Research Institute, Bhopal.
Jyoti has received Import Substitution Awards from Government of
India thrice for development of MOCB range of products.
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Vacuum Circuit Breakers (VCBs)
and Vacuum Contactors
 Jyoti has technical collaboration with Toshiba Corporation,
Japan for manufacture of VCBs. 'Jyoti' 7.2 kV Medium Voltage
Switchgear panels and Outdoor VCB's are serving Thermal Power
Stations while 12/24/36 kV 'Jyoti' VCB panels & Outdoor VCB's
are in service in utilities and Core Industries.
At present,
more than 10,000 Nos. VCBs are in satisfactory service. Entire
range of Switchgear is fully type tested at independent testing
stations in India at CPRI & ERDA. Additionally, Jyoti's 12 kV
VCB & Panels are type tested at KEMA, The Netherlands also.
The Switchgear Division has received ISO 9001 certificate from
TUV CERT, Germany for establishing and applying Quality system.
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