FDBSS1S140500A contact for the liquid level switch on the top cover of the hydropower station unit

FDBSS1S140500A contact for the liquid level switch on the top cover of the hydropower station unit

FDBSS1S140500A contact for the liquid level switch on the top cover of the hydropower station unit

FDBSSThe operating principle of the connecting rod float level switch is to install one or more magnetic spring switches inside a sealed metal or plastic tube, and then thread the tube through one or more hollow floats with circular magnets inside. Using a fixed ring, control the float and magnetic spring switch to move up and down within a certain range. Use the magnet inside the float to attract the contact of the magnetic spring switch, producing the action of opening and closing. The characteristics include PP and PVDF materials, which are suitable for strong acid-base environments; SUS304/316 metal material is suitable for high temperature and high pressure tank.

Unique design

All switch outlets are located in the same junction box, making external construction wiring cost-effective.

There are PVDF PP PVC plastic materials and SUS304, SUS316 metal materials available, so there are suitable products that can be used with acid, alkali liquids, solvents, or various fuels.

Magnetic reed switches are isolated from wires and liquids.

The protection level of safe and reliable junction boxes is above IP65.

Magnetic reed switches are isolated from wires and liquids, making them safe to use in high temperature and high voltage equipment.

The use of magnetic spring switches does not require power supply, and the contact life can reach 2 million times.

Power plant auxiliary control equipment: temperature measurement brake screen, automatic control of oil, water and gas system, DC system, excitation system, fully automatic filter device, etc.

Power plant automation control system: gate group monitoring system, comprehensive electricity collection system, computer monitoring system, etc.

Integrated control and protection panel for low-voltage units in power plants: synchronous grid connection, excitation regulation, various protections (overvoltage, undervoltage, overcurrent, overspeed, load shedding, lightning strikes, differential protection, etc.), unit data monitoring (active, reactive, power factor, voltage, current, frequency, etc.), reactive power compensation.

Substation WND500O series microcomputer protection and measurement device, WND6000 solar power generation comprehensive protection and monitoring system, WND2000ARC arc light safety monitoring system, WND8000 series low-voltage protection device

The XAFEA21 integrated electromagnetic flowmeter produced by XALTHYYXGS is used to measure the water flow rate on the outlet pipe of the power station air cooler and thrust bearing external circulation cooling water. This electromagnetic flowmeter has high accuracy, stable performance, and low failure rate, which is conducive to the long-term operation of the power station. The electromagnetic flowmeter LCD head has instantaneous and cumulative flow display, and the parameters can be freely modifiedOne 4-20mA analog output, one switch output, and one pulse output.

Install 8045 plug-in electromagnetic flowmeter and 8025 turbine flowmeter on the water pipes of the upper guide, water guide, and main shaft seals, as well as on the oil pipes of the thrust outer circulation. The main features are: two adjustable flow switches and one 4-20mA analog output.

Install TCS-K-2 flow switches on the water pipes of the upper guide, water guide, and main shaft seals, as well as on the oil pipes of the thrust outer circulation. The measurement principle of flow switch is thermal conductivity, with two thermal resistors on the measuring probe, one of which measures the temperature of the medium; The other thermistor is heated, and when the liquid flows, it takes away heat, creating a certain temperature difference between the heated thermistor and the medium. The faster the medium flow rate, the greater the temperature difference. By measuring the temperature difference between the two resistors, a switch signal is sent out. The flow switch has no movable parts, the action value is adjustable, and the component model is not affected by changes in the measuring pipeline. The flow switch based on this measurement principle is now widely used in power stations. Feedback from the application of flow switches in several power stations by Guotou Hydropower Co., Ltd. shows that this meter can meet the requirements of installation conditions.

The flow measurement of the unit adopts ultrasonic flowmeter. Six units use one ultrasonic flow meter, including LUW22 ultrasonic flow meter, two backup hosts for each other, and three expansion cabinets, which are grouped in a standard cabinet. Realize online measurement of flow rate for six units. The measurement results (including flow rate, flow velocity, cumulative flow rate, flow meter working status, etc.) can be displayed on the local machine, and can also be sent to the entire plant computer monitoring system through MODBUS communication protocol and RS485 interface.

The installation of ultrasonic flowmeter and the horizontal section of 8m pressure steel pipe before the snail shell inlet, all 6 pipelines use cross section 8-sonic internal transducers to ensure ± 0.5 flow measurement accuracy. The ultrasonic transducer adopts a dual backup structure. Two ultrasonic transducers are installed on each measuring probe, and their signal lines are led to the terminal box. When one ultrasonic transducer has a problem, it can be quickly converted to the backup and connected to the flowmeter host through a dedicated signal cable.