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It is mainly composed of accessory modules such as main circuit contactor, intelligent controller, electromagnetic mechanism, operating mechanism and auxiliary contacts. The main circuit contact group is composed of bridge type, double power-off contact, grid arc extinguishing chamber, current-limiting fast-action mechanism, etc. One group for each pole. When the load end is short-circuited, the main contact will be separated by quick action and the operation will be driven at the same time. The mechanism cuts off the coil circuit so that each phase is in a disconnected state.
The product adopts a modular single product structure, integrating the main functions of traditional circuit breakers (fuses), contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators, etc. , with remote automatic control and local direct manual control functions, with panel indication and electromechanical signal alarm functions, with overvoltage and undervoltage protection functions, with phase failure and phase loss protection functions, with coordinated time current protection characteristics (with reverse Time limit, definite time limit and instantaneous three-stage protection characteristics). By selecting functional modules or accessories as needed, you can control and protect various motor loads and distribution loads.
In terms of its structure and function, the series of products is no longer a single product such as a contactor, circuit breaker, or thermal relay, but a set of control and protection systems. Its appearance fundamentally solves the various problems of unreasonable control and protection coordination caused by unreasonable selection of traditional discrete components (usually circuit breakers or fuses + contactors + overload relays), especially overcoming the When electrical products using different assessment standards are combined together, the protection characteristics and control characteristics are not coordinated, which greatly improves the operational reliability and continuous operation performance of the control and protection system.
Functions and uses of control and protection switches
1. Energy-saving and low temperature rise
The control and protection switching appliances adopt new energy-saving technology. The switch electromagnetic system adopts a starting current circuit and a switch holding current circuit. , the switch electromagnetic system AC starts, and the DC controlled by the microcontroller maintains the pull-in working mode. The iron core loss and short-circuit ring loss of the switching electromagnetic system are reduced to a minimum, and the coil copper loss is only about the original, thereby saving electric energy to the greatest extent and reducing the temperature rise and noise of the switching electromagnetic system.
The second energy is reliable and has a long life
The electromagnetic system that controls and protects switching appliances has a buffer device, which reduces the energy impact of the switching electromagnetic system, thus improving
Control and protection switch
Control Protection switch
Improves the suction performance of the switch and extends the service life of the switch. The control and protection switch electrical microelectronics use high-quality microcontrollers and famous brand electronic components, carefully designed circuits, and optimized design from both the hard and soft aspects of the product to reduce electromagnetic interference and improve product reliability.
Its specific functions and characteristics are as follows
It has remote automatic control and local direct manual control functions, it has panel indication and electromechanical signal alarm functions
It has coordinated time current protection characteristics ( With long delay, short circuit short delay, and instantaneous three-stage protection characteristics), with phase failure, overcurrent, blocked rotor, short circuit, undercurrent, overvoltage, undervoltage, leakage, three-phase unbalance, isolation, start delay time (to avoid starting large current
, which is separate from the overcurrent action time) and many other functions
. The monitor displays various operating, fault and other states. It has the functions of voltmeter and ammeter
. It is equipped with setting keys, shift keys, data keys, and reset keys. It can set and query various parameters. Due to the storage and memory technology used, parameter setting and power outage can be realized. The parameters set later are still saved and do not need to be set again
. It has a fault memory function to facilitate fault query and analysis
. It has a communication interface and an open fieldbus (protocol), which brings convenience to user system integration. , to facilitate users to realize intelligent management.
, Users can control and protect various motor loads and distribution loads by selecting functional modules or accessories according to their needs.
Purpose and applicable fields
It has integrated control and protection functions, modular structure, small size, high protection level against environmental pollution, high breaking short-circuit current capability, small flying distance, long electrical life, high continuous operation and reliability, and is easy to install and use. It has a series of advantages such as easy maintenance and operation, and is especially suitable for electronic control systems such as pumps, fans, air conditioners, fire protection, and lighting in modern buildings. Motor control and protection in metallurgy, coal mines, steel, petrochemicals, ports, ships, railways and other fields .Motor control center, especially intelligent electronic control systems or those requiring high breaking capacity (if the requirements are met for distribution control systems). Single motor control and protection in factories or workshops.
For the application of advanced digital processing technology , high measurement accuracy, good linearity, accurate and reliable fault resolution, and strong anti-interference ability. This product can be controlled remotely or directly manually on the spot to cooperate with users. It operates continuously after short circuit, has high protection level and high breaking capacity. It has many advantages such as small flashover distance, long life, small size, convenient installation, use and maintenance, and various nearby features
Complete supporting accessories including auxiliary contacts and signal alarm contacts, shunt tripper, and remote re-releaser , door or drawer panel operating mechanism, control circuit conversion module, etc., can form a complete control and protection unit on a single product to achieve coordinated control and protection functions. Flexible horizontal installation, vertical installation, and horizontal installation do not affect the use performance. It can be widely used in compact complete sets, including fixed or drawer-type cabinets, especially in / and / drawers. It has incomparable advantages over separate components. Safety Reliable, high-protection level. The terminal blocks for front-board and plug-in rear-panel wiring are all anti-touch functions. When equipped with high-protection level shells, they can be used in humid places in civil buildings, basements, pump rooms, coal mines, ports, ships, and petrochemicals. It is an ideal product to replace the current electromagnetic starter, protected and combined starter in other fields. It is mainly used for connecting, carrying and breaking in power systems with AC, rated voltage up to and current from current under specified conditions, and can connect, carry and break current under specified abnormal conditions (such as short-circuit current).
Therefore, it is widely used in industry, transportation and other fields, and is especially suitable for water pumps and fans in modern buildings. , air conditioning, fire lighting and other electronic control systems, motor control and protection in factories or workshops, and remote control lighting systems.
Control and protection switch models
The basic product is used as the main switch and is combined with various mechanisms and functional accessories to form the following series of products
Digital basic control and protection switch appliances
Liquid crystal advanced control and protection switching appliances
Fire control and protection switching appliances
Isolation type control and protection switching appliances
Leakage type control and protection switching appliances
Communication type control and Protection switching appliances
Two-speed control and protection switching appliances
Three-speed control and protection switching appliances
Reversible control and protection switching appliances
Star-delta pressure reducing starter
Self-coupling decompression starter
Resistance decompression starter
Precautions for installation of control protection switch
Equipment installation requirements
To ensure the accuracy of the protection characteristics, the installation of connecting wires should comply with According to regulations, you should carefully check whether the coil voltage and accessory control power supply voltage are correct and consistent before use to avoid damage. The operating knob should be able to operate normally. The electromagnet should be closed when the operating knob is in position. When the operating knob is turned to the position, the electromagnet is released, and its mounting surface is allowed to rotate left and right relative to its axis.
If it is in the tripped state (both rotated to the position), the knob should be turned to the re-buckled position and then to the position to achieve remote control.
It should not be exposed to wind and rain during transportation and storage. It should be placed in a warehouse where the daily average relative humidity is not greater than (at ℃, the ambient temperature is not higher than +℃ and not lower than ℃
Setting and operation
Before operation, the user should set parameters, empty parameters Running, (when the motor is starting and running, pressing the setting key is invalid. Press the setting key to select the setting type. Press the shift key in sequence to select data shift. Press the data key to modify the data. After a certain parameter is set, press the setting key again. Enter the next setting state, and the value reaches the end. Unnecessary options should be abandoned. After all parameters are set, press the reset button to exit the setting state.
Examples are as follows
Product/motor settings, start delay When running, overcurrent inverse time limit protection, three-phase current unbalance percentage value, overvoltage value, undervoltage value, undercurrent value.
When starting to run, the voltage value is displayed, and the phase and phase can be displayed directionally by pressing the shift key. , phase, (leakage) current operation conditions.
During no-load operation, press the data key and compare it with the fault type symbol on the panel to view the previous fault type.
Normal working conditions of the control protection switch
■ The upper limit value of ambient air temperature does not exceed +℃
△The lower limit value does not exceed ℃
△The daily average value does not exceed +℃
△When the ambient air temperature exceeds the above range, the user You can negotiate with our company
■The altitude of the installation site does not exceed meters
■Atmospheric conditions
The relative humidity of the atmosphere does not exceed when the ambient air temperature +°C. It can be higher at lower temperatures. Relative humidity. When the monthly average minimum temperature is +℃, the average maximum relative humidity of the month is. Measures must be taken to prevent condensation on the product due to temperature changes
■Pollution level
■Installation category Category III (system), Category IV (system)
■The control power supply voltage should be within the fluctuation range of (~)
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