Enerpro - Circuit Protection
In SCR converters, or AC controllers, a high rate-of-rise in anode-to-cathode voltage, or dV/dt, occurs when a SCR ceases conduction, or when another SCR in the circuit is gated into conduction. High peak voltage is produced when an inductive circuit connected to the SCR is interrupted. The peak and rate-of-rise (dV/dt) of the SCR voltage must be limited to avoid erratic circuit operation and device damage. Connected anode to cathode, the snubber circuit resistor/capacitor limits dV/dt and the metal-oxide-varistor (MOV) limits peak voltage.
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Manufactured by Enerpro The TSB-1 snubber board is used for one dual SCR module, such as a single-phase AC controller. The TSB-1 may also be used in multi-module applications (one per module) where space is limited. |
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The TSB-3 designed and manufactured by Enerpro Inc snubber board is typically used in 3-phase AC controller applications, or for a 3-phase semi-converter DC bridge.
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Enerpro Inc have designed The TSB-6 snubber board for use typically in 3-phase, 6 SCR, single-phase 4 SCR DC bridge applications.
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The TSTB120-1 snubber board has voltage and current transducer circuits that can be input into a microprocessor for voltage and current control in a 12-pulse bridge rectifier application.
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