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Models D18S and D18C No. 7
Reprinted: July 15, 1952 |
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INTERCHANGEABILITY OF REVERSE CURRENT RELAYS
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In order to facilitate changing from one type of reverse current relay to
another, it will be necessary to make certain wiring changes. Wiring diagrams
covering the changes are included in this letter. The Westinghouse and General
Electric Installation shown on the wiring diagram is also applicable to the
Leese Neville and AN3025-1 types of relays.
On airplanes equipped with Bendix No 688-2 reverse current relays and where a
change is made to either Westinghouse, General Electric, Leese Neville, or any
make of AN3025-1 relays, wires numbered 630 in the right generator control box
and 622 in the left generator control box are removed from their ground
connections and connected to the terminals marked GEN. on the reverse current
relays. If changing from Westinghouse, General Electric, Leese Neville, or
AN3025-1 type relays to Bendix No. 688-2, it will be necessary to remove wires
numbered 630 and 622 from the terminals marked GEN. and fasten them to a good
ground within the control box. This procedure would be in reverse to that
outlined above.
Your airplane may be equipped with any one of the following types of reverse
current relays listed below, so a check should be made to determine if changes
in wiring are necessary. |
| Westinghouse |
Type AVR-14A |
Part No. 1240224A |
| Westinghouse |
Type AVR-14B |
Part No. 1171000A
Part No. 7-A-5930-GR-1 |
| General Electric |
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Part No. 3CTR72A1 |
| Leese Neville |
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Part No. 24565 |
| Any Make |
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AN3025-1 |
| Bendix |
Type 688-2 |
To be used on D18S Airplanes only |
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