Zhejiang Shendun Electric Appliance Co

Control and protection Zhongkai Kaibao Xinling control and protection switch electrical appliances Guojia Guojia Ouyi factory direct sales price control and protection Jiangsu Yuantai Jiangsu Kailong Shanghai Jiayi basic fire isolation pressure reducing resistor star delta leakage
New diagram
Mainly used in power systems with AC rated voltage to rated current, capable of connecting and breaking currents under normal conditions including specified operating overload conditions, and capable of connecting and breaking specified non-conducting voltages. Current under normal conditions, such as short-circuit current.
Adopting a modular single product structure, it integrates the main functions of traditional circuit breakers (fuses), contactors, overload (or overcurrent phase failure), relays, starters, isolators, etc., and has remote automatic control and on-site service. It has direct human control function, panel indication and electromechanical signal alarm function, and coordinated time current protection characteristics (inverse time limited time limit and instantaneous three-stage protection characteristics). By selecting functional modules or accessories as needed, you can control and protect general (infrequent starting) motor loads and motor load distribution circuit loads that are frequently started
Working Features
Various operating faults The status display is equipped with a voltmeter and ammeter function and is equipped with various function keys. Various parameters can be set. The set parameters can still be saved after a power outage. It has a fault memory function.
It has a communication interface to support a variety of fieldbuses.
Especially suitable for motor control and protection. Within the set starting time, it only protects against phase failure, overvoltage and undervoltage short circuit
Current leakage and three-phase unbalance, which can avoid the impact of large current when starting the motor. , while the locked-rotor protection can effectively prevent
the motor from accidentally burning out, and the under-current protection protects the motor that is not allowed to run without load, starting from over-current.
Accessories can be configured to realize external alarm, remote control, and can also form a Δ starter with dual
control and dual power supply for the motor
Main body
Mainly composed of the main body panel and bottom plate The operating mechanism of the electromagnetic transmission mechanism is composed of the main circuit contact group (including the contact system
short-circuit release) and other components. It has short-circuit protection (similar to the short-circuit protection function of the fuse) and automatic control (similar to the contact remote control function of the device) local operation and indication functions.
Electromagnetic sensing mechanism
The electromagnetic transmission mechanism is mainly composed of control coil iron core, control contacts and base (similar to the electromagnetic control system of contactor
It has under-voltage protection function and can accept the The breaking operation command controls the main contacts in the main circuit contact group to connect
or break the main circuit. The terminal mark of the coil is.
The operating mechanism
can accept the instantaneous short circuit of each pole contact group The signal and the fault signal from the electronic tripper are cut off by the control contact
The control coil circuit is cut off by the electromagnetic operating mechanism to cut off the main circuit. After the fault is eliminated, it is reset by the operating knob.
The main circuit contact group (including the contact Head system short-circuit release)
The main circuit contact group is composed of dynamic and static double-break point contact grid arc extinguishing chamber and current-limiting fast short-circuit release action mechanism
Each pole is independent of each other and the main circuit contact The group is equipped with a current-limiting quick release, which is combined with an arc-extinguishing system with high breaking capacity to achieve high current-limiting characteristics (the tripping current setting value cannot be adjusted for backup protection with a current-limiting coefficient less than
/> It is related to the rated current of the main body and its setting value is (effective value). When a short circuit occurs in the load, the tripper makes a quick impact to open the main contact, and at the same time drives the operating mechanism to cut off the control coil circuit and make the main circuit
All poles are disconnected.
Intelligent controller
The digital controller has overload and overcurrent adjustable protection functions, and has delayed phase failure, phase loss and undercurrent
Three-phase no Good protection function under balanced overvoltage, undervoltage and low overload. The set current value includes long inverse time for overload
The set current value of delayed tripping, short circuit, short delay set current value or fixed time limit set current value can be adjusted. According to the principle and use, it is divided into various categories and specifications.
Panel indication and function setting
The digital controller has overload and overcurrent adjustable protection functions, and has delayed phase failure and phase loss. Undercurrent
Three-phase unbalanced overvoltage, undervoltage and good protection function under low overload. The setting current value includes long inverse time for overload
Delay trip setting current value for short circuit, short delay setting current value or Both fixed time limit and set current values are adjustable,
divided into various categories and specifications according to principles and uses.
Key function
Setting key In the running state, short press the setting key to enter the parameter setting state. Users can set and change various parameters
according to load requirements.
Short press the data key in the setting state to modify the flashing word bits. The step difference is (cyclic) in operation
In the row state, short press the data key to query the last fault type.
In the shift key setting state, select the set word bit, and the selected word bit is in a flashing state waiting to be changed.
Reset After the key parameter setting is completed, press the reset key briefly to save the parameters and put it into normal monitoring operation.
Light indication
The power light is always on when there is power, and flashes when communicating with the handheld programmer
Current light It always lights up when there is overload, and flashes every second when the three-phase is unbalanced (phase failure)
The voltage lamp control circuit always lights up when it is over-voltage, and flashes when it is under-voltage
It is mainly used for switching from AC rated voltage to rated current. In the power system, it is capable of carrying and breaking current under normal conditions, including specified operating overload conditions, and it is capable of carrying and breaking current under specified abnormal conditions, such as short-circuit current.
Adopting a modular single product structure, it integrates the main functions of traditional circuit breakers (fuses), contactors, overload (or overcurrent phase failure), relays, starters, isolators, etc., and has remote automatic control and on-site service. It has direct human control function, panel indication and electromechanical signal alarm function, and coordinated time current protection characteristics (inverse time limited time limit and instantaneous three-stage protection characteristics). By selecting functional modules or accessories as needed, you can control and protect the distribution circuit loads of general (infrequent starting) motor loads and frequent starting motor loads
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