SHINKAWA VM-5Z1 Dual Channel Eccentricity Monitor

The SHINKAWA VM-5Z1 is a dual-channel eccentricity monitoring module belonging to the VM-5 series TSI system. It is specially developed for steam and gas turbine units, supporting ultra-low frequency signal processing down to 0.1 Hz to measure rotor bowing and thermal bending during turbine turning gear and startup phases.

This rack plug-in module receives eddy current probe signals, outputs 4-20mA analog signals and configurable relay alarm contacts. It complies with API 670 machinery protection standards and is widely used for power plant turbomachinery control cabinet maintenance, system upgrade and spare parts stocking.

Main Specifications

• Brand: SHINKAWA (Japan)
• Model: VM-5Z1 Dual Channel Eccentricity Monitor
• Applicable System: VM-5 Series Turbine Supervisory Instrumentation Rack
• Low Cut-off Frequency: Minimum 0.1 Hz for slow-speed rotor measurement
• Analog Output: Dual 4–20mA proportional to peak-to-peak eccentricity
• Relay Output: Configurable Alert and Danger alarm contacts
• Power Supply: 24VDC supplied via rack backplane bus
• Measurement Accuracy: ±1.0% of full scale
• Operating Temperature: 0°C ~ +55°C
• Installation: Standard plug-in slot mounting inside VM-5 rack

Core Functions

• Collect clearance signals from eddy current proximity probes installed on turbine casing
• Calculate rotor eccentricity and thermal bending value at low turning speed
• Prevent dangerous startup caused by excessive rotor bow deformation
• Generate linear 4-20mA analog signal to DCS and data acquisition system
• Trigger relay alarm once eccentricity exceeds preset threshold limits
• Built-in self-diagnosis to detect sensor failure and module abnormal status
• Front panel indicators display module power and fault alarm status
• Support field parameter configuration without shutting down the whole rack
• Signal filtering to suppress electromagnetic interference inside control cabinet
• Modular design for fast replacement during on-site maintenance work

Application Scenarios

• Power plant steam turbine and gas turbine TSI monitoring cabinets
• Combined cycle power generation unit rotor eccentricity monitoring systems
• Thermal power plant turbine turning gear startup safety protection projects
• Overseas energy station SHINKAWA VM-5 series rack spare parts replacement
• Petrochemical plant large turbogenerator online monitoring platforms
• Cogeneration unit turbine rotor thermal bending early warning systems
• API 670 compliant machinery protection system upgrading and renovation
• Industrial turbine critical startup condition monitoring and interlock control
• Energy sector rotating equipment predictive maintenance monitoring projects
• Power plant old VM-5 monitoring system expansion and spare parts stocking