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- The Lucas Type '17ACR' alternator, now incorporates an ' avalanche ' diode against surge which occurs in the regulator. The regulator is simplified, now having fewer separate semi-conductors, and is designated '14TR' . The regulator is still built in to the alternator.
- Interchangeability is unaffected by the above statement.
- The advantage of an 'avalanche' diode is that it provides a diversionary path for the surge energy and limits the voltage appearing across the field/regulator circuit to between 22 and 32 volts, a value which is well below the minimum breakdown voltage of the output transistor.
- For Dealers who require further information on the foregoing, booklets 'EI . 17' for Regulator and 'El .20' for Alternator, are available from:Joseph Lucas (Electrical) Ltd, Birmingham, England.
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