Description
Product Parameters
| Parameter | Specification |
|---|---|
| Brand / Series | GE Mark VIe Speedtronic |
| Model | IS200TPR0H2B |
| Speed Probe Inputs | 3 independent channels (each with dual-redundant inputs) |
| Input Signal Types | Magnetic pickups, proximity probes (passive/active), TTL, 5–24 VDC logic |
| Frequency Range | 0.5 Hz – 20 kHz |
| Input Voltage Range | ±30 VDC maximum |
| Input Impedance | > 10 kΩ |
| Trigger Level | Programmable per channel (0.5–24 VDC, hysteresis configurable) |
| Redundancy | 2-out-of-3 voting logic (hardware-based) for overspeed detection |
| Accuracy | ±0.02% of reading |
| Isolation | 1500 VAC (field-to-system) |
| Diagnostics | Open-circuit detection, signal loss detection, frequency out-of-range, channel mismatch detection |
| Status Indication | 6 green LEDs (channel active), 6 red LEDs (channel fault), 2 red summary fault LEDs |
| Operating Temperature | –30°C to +65°C |
| Storage Temperature | –55°C to +85°C |
| Mounting | VME rack-mount terminal board with front-panel I/O connectors |
| Backplane Interface | VME64x (A24/A32, D16/D32/D64) |
| EMC Compliance | IEC 61000-4 Level 4 |
Advantages & Key Features
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Redundant Speed Monitoring: IS200TPR0H2B provides triple-redundant speed probe inputs with hardware-based 2-out-of-3 voting logic, ensuring safe and reliable overspeed detection.
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High-Reliability Design: Dual inputs per channel with cross-checking capability ensure system reliability.
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High Channel Density: 3 independent speed channels in a single VME slot.
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Versatile Signal Compatibility: Supports magnetic pickups, proximity probes, TTL, and logic-level signals.
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Programmable Trigger Levels: Per-channel programmable trigger voltage and hysteresis ensure reliable signal detection.
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Wide Frequency Range: 0.5 Hz to 20 kHz covers turbine startup to overspeed conditions.
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Comprehensive Diagnostics: Open-circuit, signal loss, frequency out-of-range, and channel mismatch detection per channel.
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Hardware Voting: 2-out-of-3 voting for overspeed trip decisions, independent of main CPU.
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Opto-Isolation: 1500 VAC isolation protects the Mark VIe backplane from field wiring faults.
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ToolboxST Integration: Full configuration, monitoring, and diagnostics via GE ToolboxST.
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Drop-In Replacement: Direct replacement for earlier GE speed probe terminal boards.
Application Fields
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Gas & Steam Turbines (GE Frame 6B/7EA/9E/HA): Shaft speed monitoring, overspeed detection, speed control.
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Aeroderivative Turbines: Speed monitoring and overspeed protection.
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Compressor Stations: Compressor speed monitoring.
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Generator Speed Monitoring: Turbine-generator speed measurement and overspeed protection.
Comparison with Competing Products
| Feature | GE IS200TPR0H2B | Competitor A (Speed Monitor) | Competitor B (Speed Module) |
|---|---|---|---|
| Speed Channels | 3 (each dual-redundant) | 2 | 1 |
| Voting Logic | 2-out-of-3 (hardware) | 2-out-of-2 | Software-based |
| Frequency Range | 0.5 Hz – 20 kHz | 1 Hz – 10 kHz | 1 Hz – 15 kHz |
| Accuracy | ±0.02% | ±0.1% | ±0.05% |
| Diagnostics | Open, loss, out-of-range, mismatch | Open only | Loss only |
| Isolation | 1500 VAC | 1000 VAC | 500 VDC |
| Operating Temp | –30°C to +65°C | 0°C to 50°C | 0°C to 60°C |
Key Advantage: IS200TPR0H2B provides triple-redundant speed monitoring with hardware-based 2-out-of-3 voting, ensuring the highest level of safety and reliability for turbine overspeed protection.
Selection Guidelines & Recommendations
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Sensor Type: Verify speed sensor type (magnetic pickup, proximity probe) and configure trigger levels in GE ToolboxST.
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Redundancy Configuration: Configure voting logic and diagnostic thresholds per channel.
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Overspeed Settings: Set overspeed trip thresholds via GE ToolboxST with appropriate margin above rated speed.
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Controller Firmware: Requires Mark VIe processor firmware v8.0 or later.
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Wiring Guidelines: Use shielded twisted-pair cables for speed probes. Maintain shield grounding only at the Mark VIe cabinet end.
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Spare Strategy: Keep one spare per turbine; lead times 6–10 weeks.
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Retrofit: Direct replacement—regenerate configuration in GE ToolboxST.
Important Cautions
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No Hot-Swap: De-energize rack before insertion/removal.
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Signal Polarity: For magnetic pickups, observe correct polarity for reliable zero-crossing detection.
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Trigger Level: Incorrect trigger level can cause missed pulses or false triggering—verify with sensor specifications.
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Cable Length: For magnetic pickups, use low-capacitance cables for runs exceeding 50 meters.
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Grounding: Connect AGND to Mark VIe system ground at single star point.
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Shield Termination: Ground speed probe cable shields only at cabinet end.
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ESD Handling: Use grounded wrist straps; field repair not possible.
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Voting Logic: Verify 2-out-of-3 voting configuration matches turbine safety requirements.
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Channel Mapping: Verify field wiring maps to correct ToolboxST channel numbers.
A-B 1794-IT8/A
FOXBORO P0926GH
TRICONEX 9563-810
A-B 1756-PA75
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