This emergency overspeed board monitors turbine rotational speed and triggers immediate shutdown when exceeding safe limits. It serves as a primary safety device in GE Mark V and Mark VI control systems. The DS200TCEAG1BTF provides three independent speed measurement channels for redundancy and fault tolerance.
Core Speed Detection Specifications
The board accepts input signals from up to three magnetic speed pickups or proximity probes. Each channel processes frequency ranges from 0 to 20,000 Hz with high precision. Furthermore, the device incorporates programmable overspeed trip setpoints from 100 to 20,000 RPM. The unit achieves a response time of less than 10 milliseconds from detection to trip output. It uses dedicated comparators and logic gates for deterministic trip decisions.
Connectivity and Interface Features
The front panel provides three BNC connectors for speed sensor inputs on the front panel. It also includes a 16-pin terminal block for trip output and status signals. Additionally, the DS200TCEAG1BTF offers two independent relay outputs for redundant trip actuation. A 10-pin header supports communication with the main turbine controller via serial link. Engineers can access individual channel readings through dedicated test points.
Energy Storage and Fail-Safe Operation
An onboard capacitor bank stores 12 joules of backup energy for trip latch retention. This storage maintains the last valid speed reading for up to 5 minutes. Consequently, the board retains its trip configuration during momentary power interruptions. The unit also features a built-in self-test routine that exercises all internal circuits at startup.
Mechanical Specifications and Environmental Compliance
The PCB measures 26.0 x 20.0 x 3.0 centimeters and weighs approximately 900 grams. Its heavy-duty construction meets GE’s stringent turbine control environmental specifications. The board operates reliably across temperatures from -25°C to +70°C with IP20 protection. Moreover, the DS200TCEAG1BTF conforms to IEC 61508 functional safety standards for SIL 2 applications.
Technical Parameters Summary
| Parameter | Specification |
|---|---|
| Model | GE DS200TCEAG1BTF |
| Speed Input Channels | 3 x independent |
| Sensor Type | Magnetic pickups, proximity probes |
| Frequency Range | 0–20,000 Hz per channel |
| Speed Range | 100–20,000 RPM (programmable) |
| Response Time | <10 ms from detection to trip |
| Trip Setpoints | 3 x programmable, independent per channel |
| Trip Outputs | 2 x relay, 30 V DC / 2 A |
| Input Connectors | 3 x BNC (sensors) |
| Status/Output Connector | 16-pin terminal block |
| Controller Interface | 10-pin serial header |
| Test Points | Dedicated per channel |
| Backup Energy | 12 Joules (capacitor bank) |
| Data Retention | 5 minutes |
| Self-Test | Automatic at power-on |
| PCB Material | High-temperature FR-4 |
| Dimensions (W x H x D) | 26.0 x 20.0 x 3.0 cm |
| Weight | 900 g |
| Operating Temperature | -25°C to +70°C |
| Safety Standard | IEC 61508 (SIL 2) |
System Integration and Application Areas
This overspeed board integrates directly with GE’s Mark V and Mark VI turbine control platforms. It interfaces with speed sensors mounted on the turbine shaft or gear train. The unit’s voting logic requires two-out-of-three channels to agree for trip actuation. Power generation, gas compression, and marine propulsion systems depend on its failsafe operation.
Summary
The DS200TCEAG1BTF provides essential overspeed protection for critical rotating machinery. Its triple-channel redundancy, ultra-fast response, and fail-safe design ensure maximum personnel and equipment safety. This board represents the final layer of defense in turbine overspeed scenarios.
Details
| Weight | 0.9 kg |
|---|---|
| Dimensions | 260 × 200 × 30 mm |
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