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Charging Systems

Modified Stones Tonum Regulator Panel Settings (BCD fitted)

From a BR Training booklet

When the above regulators are overhauled in BREL the battery charge contactor (CTR) and the associated cut-in relay (CIR) and regulator relay (REL) are being replaced by a battery charge diode (BCD). This alteration is detailed in Engineering Instruction MD 328 issued to BREL.

The adjustable settings for a modified regulator (BCD fitted) are:-

VSR  30.5Volts  Lead Acid Batteries
        31.5Volts  NIFE Batteries

VDR  LNK/2  position 1 permanently

Terminals LT (between B+ and NEG) and LR (between LC and H) are now removed.


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