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B&C OVM OVER-VOLTAGE PROTECTION MODULE

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14 volt28 volt
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Overview

This humble little device is a near-relative of the "crowbar" over-voltage protection circuits used in the computer industry - now adapted for use in aircraft electrical systems. Completely solid-state, this quarter-sized, sealed module is capable of taking a runaway alternator "off-line" in milliseconds. This same device is used in every 504-1, 504-2, and 505-1 PM/OV Protection Kit sold by B&C. Available for both 14 and 28-volt electrical systems.
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Q&A

Q: Regarding the OVM-14, at what voltage does it cut or trip and is it like a breaker to reset?

It is set at 16V, anything above 16V is considered over-voltage which trips at that point. This will be used in conjunction with a relay and circuit breaker. It will cause the circuit breaker to open once it hits an over-voltage. This will require a circuit breaker and relay to work, this will not function by itself.

Q: Once this unit trips, does the circuit stay open?...ie needs to be replaced like a fuse?

No, once tripped it will stop all current flow to the devices being powered by the circuit. Once power is removed, the circuit will reset.

Q: Is this B&C over voltage unit designed to be in series with the field power to the alternator?

It is not designed to be used as a stand alone over voltage regulator. It is not to be used with an internally regulated alternator.