The job this board does

Plants rarely stock spares for the hardware that fails least dramatically, which is how a failed control power supply turns an outage of hours into an outage of days. The DS200UPSAG1A is that kind of hardware: a GE DS200-series power supply board, documented by suppliers as the supply for EX2000 excitation systems and known, in GE's own reuse of the design, as the UC2000 power supply of the Innovation Series drive-control era. Republished GE-era text describes it as a two-stage off-line switching supply accepting an AC or DC line input and delivering control-level output voltages. It comes from the same Salem, Virginia board catalog as the Speedtronic Mark V cards it usually shares a plant with — which is why it sits in our Mark V range — and this particular unit is new surplus with revision tail GD, condition exactly as the table at the end of this page states.

Rule out the inexpensive causes first

Even with a new board on hand, run the sequence — because installing a supply into an unresolved downstream fault is the classic way to lose two boards to one problem.

• Confirm the line input at the terminals: breakers, upstream protection, loose lugs.
• Inspect the board's three fuses. Open fuses mean current went somewhere it should not have; trace that path first, and replace elements only with the factory-specified rating.
• Operate the reset button; log the LED's behavior before and after.
• Respect stored energy — allow the capacitors roughly 30 seconds to discharge after power removal, per the handling guidance published for this part, before pulling the board.

One more scoping check: if what actually died is a core in a Speedtronic Mark V panel — <R>, <S>, <T>, or <C> — your part is in the DS200TCPS family, not here. The distinction between panel-side and exciter-side DS200 boards is laid out in GE Mark V DS200 Boards Explained.

Reading G1AGD

Apply GE's DS-series key: DS, Salem, Virginia; 200, base-level board; UPSA, functional acronym; G1, group; A, the non-backward-compatible functional revision that completes the catalog number DS200UPSAG1A; then GD, the backward-compatible tail — functional revision G, artwork revision D. The same G1A base circulates with DB and FD tails. Group letters are boundaries; tail letters are history. To parse any DS200 label yourself, the method is in the GE Speedtronic Part Number Decoder.

Related hardware and cross-references

Cabinets age together. While sourcing the supply, plants often review the exciter's other DS200 boards and the adjacent Speedtronic spares position; both live in our GE Speedtronic Turbine Control Boards collection, with the Mark V-specific subset in GE Mark V DS200 Boards. Sites planning the longer arc from DS200-era hardware toward later platforms can start with Mark V vs Mark VI: DS200 to IS200.

RFQ checklist for DS200UPSAG1A

1. Full part number with tail (this listing: DS200UPSAG1AGD) and your installed board's number if it differs.
2. Label photo.
3. Host cabinet and plant details: excitation system, generator or turbine package, control platform (note Simplex or TMR if Mark V).
4. New-surplus preference, or openness to other conditions we may hold of the same number.
5. Quantity, destination country, and need-by date.

DDP shipping and POs

Condition: new surplus with a one-year warranty, exactly as the table below states. Send Request a Quote; we answer within 24 hours. Delivery is worldwide DDP — customs and duties handled by us — and we accept purchase orders.