Crowbar circuit is used to protect circuit or equipment under fault condition
Over Current Causes:
- Over current flow through thyristors in a circuit due to:
- Flow of short circuit current on the load
- Simultaneous triggering two thyristors in series in a circuit
- Sustained over load
- Stalling of an electrical motor
A Conventional fuse will take quite some time to clear the fault an is not suitable for protection of the device. Fast acting semiconductor fuses are connected in series with each thyristor
Crowbar Circuit:
A Crowbar circuit is used to protect circuit or equipment under the fault condition. It consists of thyristor of a rating well in higher than the rating of the devices that are to be protected. On detection of the fault, crowbar thyristor is fired consequently fuse blows. Thus the devices are protected against over current. Crowbar protection is recommended for MOSFET circuits.
2 comments:
I will read about more types of mosfet becouse it need to be fill in this knowledge.
Such a very nice blog.
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