GE DS200TCEAG1B TCEA Overspeed Trip Exciter Board Unit

Module Feature

DS200TCEAG1B is the TCEA (Turbine Control Exciter Assembly) safety board for GE Mark V Speedtronic turbine control system.

It works independently of main control CPU for turbine overspeed protection, receiving pulse signals from magnetic speed pickups. It implements hardware overspeed trip judgement, exciter feedback signal conditioning and hard trip relay output. Supports TMR redundant configuration to improve safety reliability. Conformal coating protects circuit against moisture, dust and corrosive gas. Widely stocked as MRO spare for power plant gas turbine and steam turbine safety control cabinet.

Working principle

Speed pulse signal from shaft pickup is sent to this board.

Onboard circuit calculates rotating speed in hardware logic. Once speed exceeds overspeed setpoint, the board triggers hardwired trip relay to cut fuel and activate turbine shutdown. It also collects exciter voltage feedback signal for excitation regulation loop. Trip action is hardware-based, not relying on software scan, which serves as the final safety barrier of turbine.

Onboard components

High-speed pulse acquisition circuit, comparator logic chip, trip relay driver, exciter signal conditioning circuit, status LED bank, backplane gold finger connector, conformal coated PCB, filter capacitor and protection diode.

LED indicators

Front board LEDs indicate power, fault, overspeed alarm and trip status.

Hardware self‑diagnosis

Built-in circuit monitors speed pickup continuity, board power supply and internal circuit health. Configuration and fault diagnosis are completed by GE Toolbox / Mark V configuration software.

Programming softwareGE Mark V Toolbox, used for overspeed threshold setting, trip test and fault log review.

Electrical & Process Parameters

Model:DS200TCEAG1BBrand:GEDevice type:Turbine overspeed & exciter trip protection boardFunction:Speed monitoring, hardware overspeed trip and exciter signal conditioning for turbine safety system

Mechanical & Structure

Mounting:Slot mount inside Mark V backplane rackProtection class:IP20Housing:Conformal coated printed circuit board

Environmental

Operating temperature:-40℃ ~ +70℃Storage temperature:-40℃ ~ +85℃Ambient humidity:5~95% non‑condensing

Certification:CE, turbine control safety certificationStatus:Discontinued GE turbine spare

Installation

Cut off rack power before replacement.

Insert board into Mark V backplane slot, lock retention clip, verify speed pickup wiring and trip loop connection, download protection parameters, perform static speed simulation test and trip function test after commissioning.

Interface

Mark V dedicated backplane connector, speed pickup signal terminals, exciter feedback terminals, trip relay output terminals.

Diagnostic

Overspeed false trip: Speed pickup interference, wiring shielding bad, threshold parameter improper. Board fault alarm: Power supply anomaly, circuit component aging. No trip output: Trip relay burnout, backplane contact poor.

Product BriefDS200TCEAG1B board, GE Mark V TCEA turbine overspeed trip exciter protection board spare for power generation turbine safety rack replacement.