SJKW1 series intelligent universal circuit breaker

Scope of application
The SJKW1 series intelligent universal circuit breaker (hereinafter referred to as the circuit breaker) is suitable for distribution networks with AC 50Hz, rated voltage up to 660V (690V) and below, and rated current ranging from 200A to 6300A. It is used to distribute electrical energy and protect lines and power equipment from the hazards of overload, undervoltage, short circuit, single-phase grounding and other faults. Circuit breakers have intelligent protection functions and precise selective protection, This circuit breaker can improve power supply reliability, avoid unnecessary power outages, and has an open communication interface that can perform "four remote" operations to meet the requirements of control centers and automation systems. The circuit breaker has a pulse withstand voltage of 8000V at an altitude of 2000 meters (adjusted according to standards for different altitudes, with a maximum not exceeding 12000V). It does not come with an intelligent controller or sensor and can be used as an isolator. It is marked as a circuit breaker that complies with standards such as GB14048.2 "Low voltage switchgear and control equipment - Low voltage circuit breakers" and IEC60947-2 "Low voltage switchgear and control equipment circuit breakers"

◆ Category:
◇ Classified by installation method: a. Fixed type b. Drawer type
◇ Divided by operation mode: a. Electric operation b. Manual operation (for maintenance and repair purposes)
◆ Type of release:
Intelligent controller, undervoltage instantaneous (or delayed) release, shunt release
◇ Intelligent controller performance:
◇ It has overload long delay inverse time limit, short delay inverse time limit, timed limit, and instantaneous functions that can be set by the user to form the required protection characteristics
Intelligent controllers are divided into: H-type (communication), M-type (ordinary intelligent), and L-type (economical)
◇ Single phase grounding protection function
Display function: setting current display, action current display, main display of each line voltage (voltage display should be specified at the time of ordering)
◇ Alarm function: overload alarm
Self check function: overheat self check, microcomputer self diagnosis (optional)
Test function: Test the action characteristics of the controller
Normal working conditions and installation conditions
◆ Surrounding air temperature
The upper limit value shall not exceed+40 ℃, the lower limit value shall not be lower than -5 ℃, and the 24-hour average value shall not exceed+30C
Note: For working conditions with a lower limit of -10C or -25 ℃, users should declare it to our company
For working conditions where the upper limit exceeds+40 ℃ or the lower limit is below -10C or -25C, users should consult with our company
The altitude of the installation location shall not exceed 2000m
◆ Atmospheric conditions
The relative humidity of the atmosphere should not exceed 50% when the surrounding air is at+40 ℃, and higher relative humidity can be achieved at lower humidity. The average maximum relative humidity in the wettest month is 90%, and the average minimum temperature in that month is+25 ℃. Considering that condensation on the surface of the product due to temperature changes exceeds the specified requirements, consultation with our company should be conducted
◆ Protection level: IP30
Pollution level: III
◆ Usage category: Class B or A
Installation category: Circuit breakers with rated working voltage of 660V (690V) and below, as well as undervoltage release devices. The primary coil of the power transformer is used for installation category IV; The installation category for auxiliary circuits and control circuits is I1
The circuit breaker should be installed according to the requirements of this manual, and the vertical inclination of the circuit breaker should not exceed 5 degrees (the inclination of the mining circuit breaker should not exceed 15 degrees)
Structure Introduction
Front indication of circuit breaker


H-type intelligent controller
In addition to having all the functions of M-type, it also has a serial communication interface, which can form a master-slave local area network system (hereinafter referred to as the system) through the communication interface. It consists of 1-2 computers as the master station and several intelligent circuit breakers or other communicable components as slave stations. The system network structure is shown in the following figure. For the circuit breaker unit, the system can achieve the "four remote" function at a long distance; monitor various grid parameters and operating parameters, monitor the current operating status of the intelligent circuit breaker, adjust and download various protection limit parameters, and control the opening and closing operation of the intelligent circuit breaker. The system is suitable for the construction and renovation of distribution monitoring systems for various power plants, power plants, small and medium-sized substations, industrial and mining enterprises, and buildings. Dedicated communication. The connection diagram of the protocol interface is as follows:

Composition of the system
The hardware structure of data communication network system The intelligent circuit breaker provides a standard RS485 communication interface, which is led out from the 10th and 11th output lines of the circuit breaker
Communication medium for system connection: Class A shielded twisted pair cable
Main characteristics of network structure
◇ Two way serial data transmission method, the product can provide multiple communication protocol methods: "Low voltage electrical data transmission communication protocol V1.0", PROFIBUS-DP, MODEBU, etc
Strict master-slave mode, where the master station is the initiator and controller of communication, and the slave stations can only communicate with the master station and cannot directly communicate with other slave stations
The communication baud rate is 9600bit/s. The communication distance is 1.2km, and for typical applications of PROFIBUS-DP communication baud rate, it can reach 187.5kbit/s
◆ Monitor drinks
YSS2000 configuration software can realize the configuration application of required monitoring and management software according to different engineering requirements. For intelligent circuit breakers, it can achieve operation monitoring and various daily management functions
◆ System Functions
◇ Remote control
Remote control refers to the operation and control of energy storage, closing, and opening of each slave circuit breaker in the system through the main station computer. The operator selects the corresponding object from the system interface, clicks the remote control button with the mouse, and the system provides the current operating status of the corresponding object. After entering the operation password, the operator can issue the remote control "close" or "open" command. The system transmits instructions to the corresponding circuit breaker slave station. Upon receiving the instructions, the slave station performs operations such as breaking, closing, and energy storage according to the predetermined timing, and reports the remote control results to the master station
◇ Remote adjustment
Remote control refers to setting the protection settings of the slave station through the main station computer. In the main station calculation, there are protection setting tables for all slave stations. The operator selects the corresponding object from the system interface, clicks the remote adjustment button with the mouse, and the system provides the current settings of all fixed values for the corresponding object, as well as the protection setting table for that object. After entering the operation password, the operator can select the required parameters from the parameter table, and then click the corresponding button. The main station can download the parameters to the corresponding slave station and report the remote adjustment results. After receiving the command, the station will modify its own protection settings
◇ Telemetry
Telemetry refers to real-time monitoring of the operating parameters of the power grid at each substation through the main station computer. The communication substation reports the following working parameters to the upper computer:
Real time A, B, C, N phase current values of each substation, as well as electrical values of UAB, UBC, UCA, etc
◇ Fault records can record the following fault parameters
Record the current values of phases A, B, C, and N, voltage values of UAB, UBC, and UCA, fault type, and fault action time during the fault in the fault database
The computer displays the current real-time current and voltage of each substation in the form of bar charts, absolute value tables, etc., and displays the operating status of each node in real-time curves
◇ Remote communication
Remote communication refers to viewing the model, closed and open status, various protection settings, and operation and fault information status of the slave station through the main station computer. The parameters reported from the substation circuit breaker to the upper computer mainly include: switch model, switch status (closed/open), fault information, alarm information, various protection settings, etc
◇ Other system functions
In addition to the four remote control functions, the system can also perform various management functions: accident alarm (information screen, screen push, event printing, accident dialing, sound alarm), event recording, maintenance tagging, shift management, load trend analysis, printing of multiple reports, etc
◆ L-type intelligent controller
The L-type controller adopts a coding switch and toggle switch setting method, with four protection characteristics of overload long delay, short circuit short delay, instantaneous, and ground leakage, as well as functions such as fault status and load current light column indication. However, it does not have digital display and its functions are not as complete as the M and H types. For users to choose from in general situations



Technical Data and Performance



Structure Overview
The fixed circuit breaker mainly consists of a contact system, an intelligent controller, a manual operating mechanism, an electric operating mechanism, and an installation board
The drawer type circuit breaker is mainly composed of a contact system, an intelligent controller, a manual operating mechanism, an electric operating mechanism, and a drawer seat
The circuit breaker is arranged in a three-dimensional form, with the characteristics of compact structure and small volume. The contact system is enclosed in an insulating base plate, and each phase of the contact is also separated by an insulating plate, forming small chambers. The intelligent controller, manual operating mechanism, and electric operating mechanism are arranged in front of each other to form independent units. If one of the units is broken, it can be completely removed and replaced with a new one
The drawer type circuit breaker consists of an inserted circuit breaker and a drawer seat. The guide rail inside the drawer seat can be pulled in and out, and the circuit breaker can be inserted and placed on the guide rail to enter and exit the drawer. The main circuit is connected by inserting the busbar on the circuit breaker and the bridge contact on the drawer seat
The drawer type circuit breaker has three working positions: "connection" position, "test" position, and "separation" position. The position change is achieved by rotating the handle in or out. The indication of three positions is displayed through pointers on the crossbeam of the drawer base
When in the "connected" position, both the main circuit and the secondary circuit are connected; When in the "test" position, the main circuit is disconnected and separated by an insulating partition, only the secondary circuit is connected, and some necessary action tests can be carried out; When in the "separated" position, both the main circuit and the secondary circuit are disconnected. And the drawer type circuit breaker has a mechanical interlocking position. The circuit breaker can only be closed in the connection position or test position, and cannot be closed in the middle position between connection and test



◆ External single-phase grounding protection function
External transformers (neutral pole transformers or ground current transformers) are provided to users as accessories. The user shall insert it into the busbar by themselves and connect the wire (length of 2m) to the secondary wiring terminals # 25 and # 26 of the circuit breaker
The size of the center opening of the external transformer (maximum allowable for the through-hole busbar) is as follows:

◆ Wiring Terminal
The circuit breaker has a total of 47 wiring terminals, which are simple to connect and easy for users to use. The wiring diagram is shown in the figure
◆ (Controller with M-type or L-type basic functions)
◇ Other wiring of intelligent controller
◇ # 1 and # 2 AC working power input (input from DC power modules U1 and U2 in DC mode)
◇ # 25, # 2 external neutral or ground current transformer input

Note:
If the control power voltages of F, X, and M are different, they should be connected to different power sources separately
Terminal # 35 can be directly connected to the power supply (automatic pre energy storage), or connected in series with a normally open button and then connected to the power supply (manual pre energy storage)
If requested by the user, terminals # 6~# 7 can output normally closed contacts
In addition, the attachment should be provided by the user themselves
DC110V or 220V is input from U1 (+) and U2 (-), and the two output terminals of the DC power module are respectively connected to the secondary terminal block terminals 1 (+) and 2 (-)

The controller signal output drives the external relay J to output contact action signals through terminals 12, 14-16, 20, and 21
The power transformer (the user needs to specify the input voltage value in the ordering specification) is provided by the manufacturing company. The power transformer can be inserted into the standard guide rail together with the relay base, and the user can install it in the appropriate position of the switchgear
Relay model: HH62P, AC/DC24V, to be provided by the user
◆ Self diagnostic signal output conditions: A. Controller internal>80; B、 The chip is not working properly; C、 Controller loses power
Users can choose to connect J12 according to their actual needs J14~J16、J20、J21。

Note:
If the control power voltages of F, X, and M are different, they should be connected to different power sources separately
Terminal # 35 can be directly connected to a power source (automatic pre energy storage) or connected in series with different power sources
If requested by the user, terminals # 6~# 7 can output normally closed contacts
◆ Additional user provided items
When the working power supply of the intelligent controller is DC power supply, a DC power supply module must be added (at this time, terminals # 1 and # 2 cannot be directly connected to AC power supply). The secondary wiring is shown in the diagram The DC power supply DC110V or 220V is input from U1 (+) and U2 (-), and the two output terminals of the DC power module are respectively connected to the secondary terminal block terminals 1 (+) and 2 (-)
◇ SB1 shunt connection button (user provided) X closing electromagnet DF auxiliary contact Q undervoltage release or undervoltage delay release
◇ SB2 undervoltage button (user provided) M energy storage motor F shunt release O normally open contact (3A/AC380V)
◇ SB3 closing button (user provided) XT wiring terminal SA motor micro switch signal light (user provided)
The controller is M-type with additional functions or H-type
Other wiring of intelligent controller:
◇ # 1, # 2 AC working current input (input from DC power supply module U1, U2 in DC mode)
◇ # 10RS485 communication P terminal (simplex) remote adjustment and remote communication
◇ # 11RS485 communication N terminal (simplex) remote control telemetry, etc.

#12 overload warning signal output
#13 Communication remote control shunt trip output
#14 instantaneous short delay tripping signal output or communication remote control closing output
#15 long delay trip signal output or communication remote control energy storage output
#16 Ground (or neutral) fault trip signal output
#17 Unloading Load 1 Signal Output
#18 unloading load 2 signal output
#19 signal output common line
#20 Self diagnosis and diagnosis output
#21 trip signal (available for shunt or undervoltage actuators)
#22 Voltage Signal Phase A
#23 Voltage signal B phase
#24 voltage signal C phase
#25, 26 external neutral or ground current transformer input
The controller signal output drives the external circuit breaker J to output contact action signals through terminals 12-18, 20, and 21
The RS485/232 converter, DP module, and current transformer (the user needs to specify the input voltage value in the ordering specification) are provided by the manufacturing company. The power transformer can be inserted into the standard guide rail together with the bottom seat of the circuit breaker and installed by the user at a suitable position in the switchgear
◆ Breaker model: HH62P, AC/DC24V, to be provided by the user
◆ Main station computer user provided
The output of terminals 13~15 can be used for communication remote control opening, closing, and energy storage. The disengagement signals of corresponding terminals 14 and 15 are no longer output at this time. The normally open contacts of the corresponding relays are connected in parallel with the corresponding manual control buttons to achieve remote control. If remote control function is not required, terminals 14 and 15 can be connected in series to two signal lights through the normally open contacts of relays J14 and J15 to remotely output the corresponding signals. Please indicate whether remote control function is required in the ordering specifications, and the manufacturer will decide the corresponding functions of terminals 14 and 15 based on this. The output of terminal 21 can be used as backup protection after pushing relay J21
On the condition of self diagnosis signal output: a. The internal temperature of the controller is greater than 80 ° C; b、 The chip is not working properly; c、 Controller loses power
Users can choose J12 according to their actual needs J14~J16、J20、J21。
Note:
If the control power voltages of F, X, and M are different, they should be connected to different power sources separately
Terminal # 35 can be directly connected to the power supply (automatic pre energy storage), or connected in series with a normally open button and then connected to the power supply (manual pre energy storage)
If requested by the user, terminals # 6~# 7 can output normally closed contacts
◇ In addition, additional user provided items
When the working power supply of the intelligent controller is DC power supply, a DC power supply module must be added (at this time, terminals # 1 and # 2 cannot be directly connected to AC power supply). The secondary wiring is shown in the diagram. The DC power supply DC110V or 220V is input from U1 (+) and U2 (-), and the two output terminals of the DC power module are respectively connected to the secondary wiring socket terminals 1 (+) and 2 (-)
Appearance and installation dimensions
The installation dimensions and external dimensions of the fixed circuit breaker are shown in Figures 1 and 2