Intelligent speed monitor JM-C-3ZS-102 is based on the advanced ARM core architecture and integrates a precise signal acquisition and processing system. It can adapt to various types of sensors, including CS-1 sensor signals, CS-3 sensor signals, and CWY-DO-φ8mm eddy current sensors. Taking the magnetoelectric sensor as an example, when the rotating parts of the steam turbine (such as gears, shafts, etc.) are close to the sensor, the teeth or protrusions of the rotating parts change the magnetic field distribution around the sensor, causing the magnetic flux in the induction coil to change, and generating induced electromotive force according to the law of electromagnetic induction. The higher the speed of the steam turbine, the higher the frequency of the induced electromotive force. JM-C-3ZS-102 can accurately calculate the real-time speed of the steam turbine by capturing and analyzing the frequency of the electrical signals output by these sensors.

Performance advantages

1. Wide range and high precision measurement: The monitor has a very wide measurement range, covering 0 – 99999 rpm, which meets the measurement requirements of different speed ranges of the turbine at various stages such as startup, normal operation, and shutdown. Its measurement accuracy is better than ±1 r/min. Whether it is the low-speed cranking of the turbine (it can accurately measure the cranking speed of 3-5 revolutions) or high-speed stable operation, it can provide operators with accurate speed data to ensure that the turbine always operates under the best working conditions, maintain a stable power generation frequency, and improve the quality of power.

2. Intelligent and flexible settings: Intelligent speed monitor JM-C-3ZS-102 has highly intelligent characteristics. Key parameters such as speed range, alarm value, danger value, overspeed value, etc. can be arbitrarily set through convenient panel operation. The number of teeth setting range is within 1-255 teeth, and the factory default value is 60 teeth. Users can flexibly adjust according to the actual number of teeth of the rotating parts of the turbine, which greatly enhances the adaptability of the monitor to different types of turbines.

3. Multi-mode monitoring and alarm: supports multiple speed monitoring modes such as single-point monitoring, multi-point monitoring, and interval monitoring to meet the diverse monitoring needs under complex working conditions of power plants. When the turbine speed is abnormal and exceeds the preset alarm value or danger value, the corresponding alarm indicator or danger indicator on the front panel of the monitor will light up immediately, and the alarm relay or danger relay will act quickly to output a switch signal. Not only that, it is also equipped with an emergency trip device. When the unit speed soars to 110% of the rated speed, the emergency trip device impactor is struck under the action of strong centrifugal force, triggering the turbine emergency shutdown procedure, effectively avoiding serious accidents caused by speed out of control, and comprehensively ensuring the safety of equipment and personnel.

4. Historical data memory and query: It has a powerful historical data memory function that can store past key speed data. When operating personnel are performing equipment maintenance and troubleshooting, they can easily and quickly query historical speed information, providing strong data support for analyzing the operating status of the turbine and judging potential fault hazards.

5. Wide voltage adaptability: With AC85 – 265VAC wide range power supply, it can easily cope with the complex and changeable power supply environment in the power plant, reduce equipment failures caused by voltage fluctuations, improve the stability and reliability of equipment operation, and facilitate user use and maintenance.

Installation and maintenance

1. Installation points: It is recommended to install JM-C-3ZS-102 in a clean, dry place with an ambient temperature of -10 – 45℃ and no corrosive gas to avoid the impact of harsh environmental factors on equipment performance and service life. During the installation process, it is necessary to ensure that the installation position of the sensor and the rotating parts of the steam turbine is accurate, and the gap meets the specified requirements to prevent inaccurate signal acquisition due to improper installation. At the same time, it is necessary to carry out standardized wiring according to the equipment manual, ensure that the line connection is firm, do a good job of line shielding, effectively resist external electromagnetic interference, and ensure that the speed signal is stably and accurately transmitted to the monitor.

2. Maintenance instructions: Intelligent speed monitor JM-C-3ZS-102 is suitable for long-term online monitoring, easy installation and commissioning, and does not require too much on-site maintenance work on a daily basis. However, it is necessary to check the operating status of the equipment regularly, including observing whether the panel indicator lights are normal and checking whether there are abnormal fluctuations in historical data. If equipment failure or large deviations in measured data are found, professional technicians should be contacted in time for maintenance. The technicians can quickly locate and solve the problem through the self-diagnosis function of the equipment and analysis of historical data.

In the complex and critical operation system of the steam turbine in the power plant, the Intelligent speed monitor JM-C-3ZS-102 occupies a pivotal position. It is like the “intelligent guard” of the steam turbine, accurately guarding the core operating parameter of the steam turbine speed, and providing solid guarantee for the stable and efficient power generation of the entire power plant.

By the way, we have been supplying spare parts for power plants around the world for 20 years, and we have rich experience and hope to be of service to you. Looking forward to hearing from you. My contact information is as follows:

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