Low-voltage intelligent over-voltage, under-voltage, phase-break, zero leakage, wide over-current protection, reclosing circuit breaker OEM/ODM, recloser,rated operating current (arbitrarily set), minimum 10A~maximum 800A

 

Low-voltage intelligent over-voltage and under-voltage, phase-break and zero-leakage reclosing

Using intelligent chips to diagnose various types of faults in the power supply system, intelligently restore power after instantaneous fault trips , and automatically lock permanent faults. It can inform the power supply management personnel of the type of failure, so that it can be eliminated and resumed in time. The product uses a backlit LCD screen to display the operation status of the power distribution station area and line equipment in Chinese. It can communicate with the computer through the RS - 485 interface, complete the remote four-remote function, realize the remote operation and management of the distribution station area, check the operation record, data storage and printing. It also has the ability to remotely adjust and set the overload protection value according to the transformer capacity or actual load demand, and has the functions of manually setting the leakage protection gear and automatically tracking the residual current. Realize the intelligent automatic setting of the residual current value, and query and display the current execution gear value at any time. It is conducive to the operation rate and reliability of the larger residual current protection in the rainy season, which solves the difficulty of the user manager to set the protection device reasonably, reduces the problem of frequent trips, and will not affect large-scale power outages by skipping trips. At the same time, the labor intensity of electricians is reduced, and the reliability of power supply is improved. The product meets the requirements of GB14048.2 , GB6829 and Q/GDW614-2011 standards . 

2. Scope of application

   It is mainly suitable for low-voltage power grids where the neutral point of three-phase four-wire is directly grounded. It can provide indirect contact protection for the residual current alarm and control of line equipment, and personal electric shock hazards. The rated voltage is 220V to 380V~ and the rated current is 100A to 630A . Protect the power distribution area, upper protection power transformer, lower protection circuit, motor and other electrical equipment such as overload, ground fault, overcurrent, short-circuit quick-break, over-voltage, under-voltage, phase failure and zero failure, etc., adapt to group assembly Remote management of the control and protection of electric cabinets, power distribution boxes in power supply stations, and meter boxes of incoming lines.

3. Main functions and features

1. Main functions

1.1 Residual current

( A) When the output circuit of the circuit breaker has a sudden addition of residual current and reaches the set gear, the breaker will be opened within the set time, and it will automatically reclose within 20 to 60s , and the display will display the number of trip fault records cyclically.

( B) The circuit breaker can automatically track and automatically adjust the residual current action value gear when the humidity in the air changes due to the alternate change of rain and rain, which causes the residual current in the line and electrical equipment to slowly rise and fall. But when the circuit and the electrical equipment are dangerous and generate a sudden residual current to the ground, the intelligent controller can detect the reliable action under the smaller operating value gear, which effectively protects the safety of the circuit and the electrical equipment. It is beneficial to the operation rate and reliability when the residual current value is large in the rainy season, thus realizing the intelligent automatic setting of the residual current value. At the same time, the displayed current execution gear value can be queried at any time. It solves the problem that it is difficult for the user to set the protective device reasonably and reduce the frequent tripping.

( C) In places where the residual current action is not allowed, the residual current alarm gear can be set. At this time, the display will only display the residual current value. When the residual current is generated in the circuit and equipment, the leakage indicator flashes and alarms, but the residual current action is not automatically performed. The user can also manually set the gear according to the actual residual current of the line equipment. As with the computer system can be remote display so that manually operable control management fault conditions, storage, printing and the like.

1.2 Over and under voltage

    Input terminal of the circuit breaker exceeds the voltage of any phase ( 280V ) or below ( 160V ) is provided when the set voltage range, overpressure will 0.4s the opening protection, under voltage will 4s opening the protection. After the input voltage is restored, the circuit breaker automatically closes to restore power.

1.3 Overload, short circuit quick break

    Adopt thermomagnetic and intelligent electronic dual overcurrent protection. Carry out load over-current opening protection with frame level current; also can electronically intelligently set the short-circuit quick-break protection action current value below the frame level current of the circuit breaker, and open the protection within 0.2S . It can also be arbitrarily set to execute load overcurrent delay within 12 seconds of opening protection. And the lock will no longer execute the automatic closing command.

1.4 Phase failure, zero failure

 a. When any phase of the circuit breaker input terminal is open, it can be opened for protection within 4s , and it can automatically reclose after the fault is restored.

 b. After the zero line of the input terminal of the circuit breaker is disconnected, the three-phase voltage unbalance reaches a certain value and opens for protection, and automatically closes after recovery.

1.5 LCD display

   After remote computer setting or manual setting of protection parameters on site, it can be saved and viewed on the remote computer or manually viewed on site. At the same time, the LCD screen automatically displays various fault types, protection parameters and operating data.

1.6 Remote control

 a. It can be output to the required occasions in the form of a passive set of switching contacts on the circuit breaker to achieve remote monitoring of the switching status and control switching.

 b. Cooperate with the prepaid electric energy meter to automatically switch off the arrears and automatically close after paying the full electricity bill.

 c. The circuit breaker is equipped with RS-485 communication interface. After connecting with the field bus and other adapters, it can communicate with the computer to achieve operation management such as remote adjustment of parameters or downloading of fault parameters and records.

2. Main features

2.1 It has thermal magnetic and electronic overload and short circuit protection for circuits and electrical equipment, achieving self-protection and prolonging the service life of the switch.

2.2 Display various current opening and closing action information, real-time display of three-phase voltage value, three-phase load current value and residual current value.

2.3 It adopts Chinese cyclic display to directly reflect the types of faults, the number of fault trips and various parameters. There is no need to check the code meaning of various parameters.

2.4 The parameters of various protection functions can be arbitrarily set with safety values ​​according to the needs of the management equipment.

2.5 It has hierarchical and selective protection functions such as residual current, overload current and short-circuit current, which will not affect large-scale power outage due to overstepping.

2.6 There is a reliable password protection to prevent arbitrary changes to the set parameters and effectively protect the reliable operation of the power grid.

2.7 Full electronic passive function. When the equipment power supply is short-circuited, when the voltage drops from 380V to 10V instantly , the intelligent control can also protect the trip and lock.

2.8 The product is small in size and compact in structure, which is about 20% less than the existing similar products on the market . It can also be installed in a small meter box.

2.9 Suitable for various power distribution cabinets, boxes, remote button operation or hand-type wireless remote control, mobile phone, computer background software management operation.

Four, normal use and installation conditions

1. Ambient temperature: -5 ℃～+40 ℃, and the average temperature within 24 hours does not exceed +35 ℃. When the temperature is lower than -25 ℃, consult the manufacturer.

2. Relative humidity: when the highest temperature is +40 ℃, the relative humidity of the air does not exceed 50% , and higher relative humidity is allowed at lower temperatures, for example: 90% at 20 ℃ , for occasional temperature changes Special measures should be taken for the resulting condensation.

3. Altitude above sea level: no more than 2000 meters.

4. Pollution degree: 3 (The external magnetic field of the installation site does not exceed 5 times the geomagnetic field in any direction ).

5. Installation category: Ⅲ.

6. Install in a place without obvious impact and vibration.

Five, the main technical parameters of the product

1. The main technical parameters are shown in Table 1.

2. Delayed reclosing time: 20~60S

3. See Table 2 for the protection characteristics of overcurrent thermal release.

4. Classification of action characteristics: AC type;

Table 1: Main technical parameters

model	Rated  Insulation voltage	Rated  Operating Voltage	Rated punch  Shock withstand voltage	Rated work  Working current (arbitrarily set)	Rated remaining  Action current (automatic tracking)	Rated breaking time  (Arbitrarily set)	Rated ultimate short-circuit breaking capacity (kA)	Rated short-circuit breaking capacity (kA)	Flying fox distance  (mm)
100A	690V	380V	6kV	10~100	100mA   300mA 500mA 800Ma 1000Ma	0.1s   0.2s 0.3s 0.4s 0.5s	20	10	≤70
250A				10~250			50	35	≤100
400A				10~400			85	50	≤120
630A				10~630			85	50	≤120
800A				10~800			85	50	≤120