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ESDR405M — ESDR4 protection relay (old H8 microprocessor generation) · ESDR4 Protection Relay
Obsolete
No longer orderable new (last-time-buy ended Jan 23, 2015).
The published repair window ended Nov 23, 2018. Contact Drake — overhaul may still be possible.
Drake-recommended replacement candidates
Drake confirms the correct replacement.
| Preferred item | Description |
|---|---|
| MRDT4 | MRDT4 transformer differential protection (manual DOK-HB-MRDT4E) |
| MCDGV4 | MCDGV4 generator differential protection (manual DOK-HB-MCDGV4E) |
Note: Replacement identified only by model name in the source (no orderable part number printed) — Drake confirms the exact replacement part before quoting. Alternative model names are printed with 'or' — Drake selects the correct type for the protection function. Last ship: 2015-04-22. Repairs and spares until: 2016-12-23.
Lifecycle facts
| Woodward part number | LR20590 |
|---|---|
| Product family | ESDR4 Protection Relay |
| Lifecycle status | Obsolete |
| Last-time-buy | Jan 23, 2015 |
| Published repair window | Nov 23, 2018 |
| Source | Woodward GmbH Product Support Statement — Product rationalization of old H8 μP based power generation controls (22. Oktober 2014) p.12 |
| Cross-reference confidence | Confirmed from the cited Woodward publication |
✓ Sourced directly from the cited Woodward publication — Drake confirms the exact part before quoting
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Check any other Woodward part number in the Obsolescence Finder, or browse the full cross-reference directory.