DS200TCTSG3ACC Simplex Trip Board Overview

The DS200TCTSG3ACC is a Group 3 build of the GE SPEEDTRONIC Mark V Simplex Trip Board (TCTS). The Mark V has been out of production for years, so keeping these legacy trip cards available — in the correct group and revision — is what lets an ageing turbine control panel stay in service. This board is offered used, cleaned and tested, and warranty-backed.

As with every card in the TCTS family, its job is to carry the plug-in trip relays whose contacts are wired into the turbine's emergency-shutdown circuit. That places it squarely on the protection side of the Mark V, so precise identification is not optional.

Matching a Group 3 Board to Your Panel

The "G3" in the part number is a functional-group marker, and it should be treated as significant: a panel originally fitted with a G3 board is normally maintained with a G3, not a G1 or G2, unless your GE documentation states an approved equivalent. Read the complete string from the installed board — DS200TCTSG3ACC — where DS200 is the Mark V board series, TCTS the Simplex Trip function, G3 the group, A the functional revision and CC the artwork/hardware revision. Confirm it against your elementary drawings, and use the GE Speedtronic Part Number Decoder if you need the field-by-field breakdown.

Troubleshooting the Trip Circuit the Smart Way

A card in the trip path attracts blame for faults that live elsewhere. The most common false leads — and what to check instead:

• The shutdown was real. The <I> alarm and sequence-of-events logs will show whether the <R>, <S>, <T> or <P> cores commanded the trip. If they did, the board is not the problem.
• A relay, not the board. Because the relays plug in individually, one failed relay can be swapped without replacing the assembly — check that before condemning the card.
• The field circuit. Solenoids, trip/dump valves and their wiring take real-world abuse; verify continuity and the interposing power.
• Physical connections. Reseat the JDR/JDS/JDT and JN/JM ribbon connectors and inspect the associated relay terminal board.

This is identification and elimination only. Trip setpoints, voting and any test sequence belong to the GE manual and your site's written procedure — do not improvise them.

The Relays, Connectors and Capacitors

Physically the board holds twelve plug-in relays (identified K1 through K12) in quick-connect sockets, three 16-pin connectors (JDR, JDS, JDT), two 12-pin connectors (JN, JM) and four 50 VDC capacitors. Remember the capacitors retain charge: isolate the drive and allow about 30 seconds before you handle the board, and keep it in its anti-static packaging until installation. For a broader view of how the DS200 cards fit together, see GE Mark V DS200 Boards Explained.

Cross-Reference: Other GE Trip Hardware

Related protection-area cards include the DS200TCTG trip board, the DS200TCTE trip module and the relay terminal boards the trip contacts wire into. For plants weighing a control upgrade, Mark V vs Mark VI: DS200 to IS200 outlines how these functions carried across to the newer platform. The full inventory sits under GE Mark V DS200 Boards.

Ask for a DS200TCTSG3ACC Quote

Include the full part number (DS200TCTSG3ACC), the revision on the board's label with a photo, your turbine model, Simplex or TMR configuration, quantity and timeline. We return quotes within 24 hours, ship worldwide DDP and accept purchase orders. Click Request a Quote, or browse related stock at GE Speedtronic Turbine Control Boards.