Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1985-08-08
1987-02-10
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307252M, 307131, 307570, H03K 1772
Patent
active
046424814
ABSTRACT:
A hybrid switch (2) having a solid state circuit (2a) including a thyristor (SCR) for closing and reopening a supply circuit (S,4,6) to a load (L) and contacts including an isolating contact (S1) for connecting power to and disconnecting power from the solid state circuit (2a), a control contact (S2) for initiating turn-on and turn-off of the thyristor (SCR), and a bypass contact (S3) for shunting the solid state circuit (2a) after the load has been energized. A zero voltage crossover circuit (ZVC) allows turn-on of the thyristor (SCR) only when the A.C. supply voltage is below a preset value to avoid arcing at the contacts on closing. The inherent zero current crossing turn-off characteristic of the thyristor (SCR) avoids arcing at the contacts on opening. A pushbutton switch (8,10) provides a mechanically controlled time delay of a minimum of the time of one-half cycle of the power supply voltage between the closing of the control contact (S2) and the closing of the bypass contact (S3) and also between the opening of the control contact (S2) and the opening of the isolation contact (S1) to allow operation of the thyristor (SCR) at zero voltage or zero current thereby to avoid arcing for long contact life and elimination of EMI (electromagnetic interference).
REFERENCES:
patent: 3330992 (1967-07-01), Perrins
patent: 3335291 (1967-08-01), Gutzwiller
patent: 3582684 (1971-06-01), Gregson
patent: 3665212 (1972-05-01), Roberts et al.
patent: 3708696 (1973-01-01), Lorenz
patent: 3902080 (1975-08-01), St. Clair et al.
patent: 3956644 (1976-05-01), Zambre
patent: 4158150 (1979-06-01), Dever
patent: 4319318 (1982-03-01), Rippel et al.
patent: 4413193 (1983-11-01), Crockett
patent: 4420784 (1983-12-01), Chen et al.
patent: 4571499 (1986-02-01), Wein
Commutation and Erosion in Hybrid Contactor Systems, S. Greitzke and M. Lindmayer, Sep., 1984.
Bielinski Ralph F.
Jaeschke James R.
Krstic Slobodan
Piber Earl T.
Theisen Peter J.
Autio W. A.
Eaton Corporation
Rowe D. A.
Zazworsky John
LandOfFree
Solid state hybrid switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solid state hybrid switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid state hybrid switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2364216