SPS5710 - GE Speedtronic Turbine Protection Relay for Mark V and Mark VI Control Systems

SPS5710 – GE Speedtronic Turbine Protection Relay for Mark V and Mark VI Control Systems

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Product Introduction:
The SPS5710 is a dedicated turbine protection relay manufactured by GE for use in the Speedtronic Mark V and Mark VI gas turbine control systems. This relay serves as the final safety barrier between the turbine control logic and the physical equipment. When the control system detects a dangerous condition such as overspeed, high vibration, low lube oil pressure, or flame failure, the SPS5710 executes the emergency shutdown by de-energizing the fuel stop valves, steam stop valves, and generator breaker. It is a hardwired, fail-safe device that operates independently of the main controller to ensure that a software failure never prevents a safe shutdown.

Technical Specifications:
Device Type: Turbine Protection Relay
Compatible Systems: GE Mark V, Mark VIE, Mark VI, Mark VIE
Input Channels: 16 to 32 discrete inputs (dry contact or voltage)
Output Channels: 8 to 16 relay outputs (Form A, Form B, Form C)
Contact Rating: 5 Amps at 250V AC / 125V DC
Trip Logic: Hardwired AND/OR logic with configurable trip equations
Response Time: Less than 20 milliseconds from fault detection to trip output
Power Supply: 125V DC or 250V DC (dual voltage capable)
Redundancy: Fully redundant dual-channel architecture (A/B)
Operating Temperature: 0 to 60 degrees Celsius
Mounting: DIN rail or panel mount

Functional Features:
Independent Trip Logic: Executes trip decisions using hardwired logic circuits, completely independent of the main CPU software, ensuring protection even during a controller crash.
Coil Supervision: Continuously monitors the health of every external trip relay coil; if a coil opens or shorts, the relay immediately alarms.
Overspeed Protection: Accepts inputs from magnetic pickups or optical sensors and trips the turbine if rotational speed exceeds the preset limit (typically 110% or 112% of rated speed).
Vibration Monitoring: Processes signals from eddy current proximity probes to detect high shaft vibration and trigger a trip before mechanical damage occurs.
Manual Trip Pushbutton: Front-panel emergency stop button for immediate manual shutdown by operators.
Event Recording: Stores the last 10 to 20 trip events with timestamps for post-trip analysis.