Overview
CPS, also known as Control and Protective Switching Devices, is a new type of product in low-voltage electrical appliances. It is the first generation of products developed in China in the 1990s to fill the domestic gap. As a new product category, its product code is "CPS", which is an abbreviation for "Control and Protective Switching Devices" in English. It complies with the standards of IEC60947-6-2 (1997) "Low Voltage Switchgear and Control Equipment Part 6: Multifunctional Electrical Appliances Section 2: Control and Protective Switching Devices" (first edition in August 1992) and GB14048.9-1998 "Low Voltage Switchgear and Control Equipment Multifunctional Electrical Appliances (Equipment) Part 2: Control and Protective Switching Devices (Equipment)" (equivalent to). IEC60947-6-2)
The codes and electrical symbols specified in IEC standards and national standards are shown in the figure

Product code and electrical attachment number
The main feature of the SSKBO series control and protection switchgear is to achieve integrated and internally coordinated control and protection functions on a single structural form of product, which can replace various traditional separate components such as circuit breakers (fuses), contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators, and motor comprehensive protectors. KBO has the function of both remote automatic control and on-site manual control for control operations, with coordinated time current protection characteristics. It has self coordination of control and protection, continuous operation after short circuit, high breaking ability, small arcing distance, long service life, adjustable protection setting current, convenient operation, and various supporting accessory modules. It can achieve control and protection of motor loads and distribution loads
The emergence of the SSKBO series control and protection switchgear fundamentally solves various problems caused by unreasonable control and protection coordination due to the use of discrete components (usually circuit breakers or fuses+contactors+overload relays) in traditional methods. Especially, it overcomes the phenomenon of uncoordinated protection and control characteristics when electrical products with different assessment standards are combined together, greatly improving the operational reliability and continuous operation performance of control and protection systems
The SSKBO series control and protection switchgear is based on the latest electronic technology, and has developed our company's unique SSKBO series digital control and protection switchgear products on the basis of peer products. It overcomes the shortcomings of peer products, gathers the advantages of low-voltage electrical components, has complete functions, reliable performance, and provides a basic component for simplifying and optimizing low-voltage distribution and control systems
● Model and significance
The complete composition and model of the basic type should include: main body model+rated current and breaking capacity level of the theme release, intelligent release, product functions, and control power supply
The meanings of each part of the product model are as follows

● Main parameter description
○ Two external installation dimensions: 125 type (D frame) and 45 type (C frame)
The number of poles in the main circuit is divided into three poles and four poles ○ Basic configuration of SSKBO control and protection switchgear: main body+intelligent controller+auxiliary contact group
The main body consists of the basic modules of the main circuit, namely the contact system module, short-circuit release, electromagnetic system module, and operating mechanism system module ○ Short circuit breaking capacity level: Economic type (C) is 35KA, standard type (Y) is 50KA, and high breaking type (H) is 80KA
The expected breaking time under short-circuit current is 2-3ms, with a current limiting coefficient below 0.2
The auxiliary contact group consists of short circuit alarm contacts, overload alarm contacts, and a set of 2 normally open and 1 normally closed auxiliary contacts. 02 is 2 normally open and 1 normally closed+1 short circuit overload, and 06 is 4 normally open, 2 normally closed+1 short circuit overload. They can also be combined according to user requirements, but the maximum number of contacts cannot exceed 11 pairs
○ Rated current of intelligent controller Ie: 0.4/1/2.5/4/6.3/12/16/18/25/32/40/45/50/63/80/100/125A
○ Main rated current In: 12/16/18/32/45/93/100/125A
○ Number of poles: represented by two digits (the first digit represents the number of poles of the product, and the last digit represents the number of poles for protection), such as 33 for 3 poles with 3 poles protection, and 30 for 3 poles without protection
○ Control power supply voltage: M: AC220V, Q: AC380V
Product Type
The configuration of the basic product SSKBO includes the main body, intelligent release device, and auxiliary contact group
The electrical schematic diagram of the basic product SSKBO can be found in the following basic electrical control diagram
Reversible Control and Protection Switchgear SSKBON: The SSKBO basic type is used as the main switch, combined with mechanical and electrical interlocks and other accessories to form a reversible control and protection switch, suitable for reversible or bidirectional control and protection of electric motors
Dual power automatic transfer switch device SSKBOS: Products with a rated current of 125A or below use the SSKBO basic type as the main switch, combined with mechanical interlocking, electrical interlocking and other accessories to form a CB or PC level dual power automatic transfer switch device ATSE; ATSE with a rated current of 125A or above is classified as PC level. Pressure reducing starter SSKBOJ SSKBOJ2、SSKBOZ、SSKBOR; The Y - △ voltage reducing starter SSKBOJ, autotransformer voltage reducing starter SSKBOZ, and resistance voltage reducing starter SSKBOR are composed of SSKBO basic type as the main switch, appropriate contactors, time relays, mechanical interlocks, and electrical interlocks to achieve voltage reducing starting and various protections for electric motors
Dual speed controller SSKBOD: The SSKBO basic type is used as the main switch, combined with appropriate contactors, electrical interlocks, and other accessories to form a dual speed controller suitable for controlling and protecting dual speed motors
Three speed controller SSKBOD3: The SSKBO basic type is used as the main switch, combined with appropriate contactors, electrical interlocks, and other accessories to form a three speed controller, suitable for the control and protection of three speed motors
Protection control box DBXBK1: The power terminal box is composed of SSKBO as the main switch and installed in a standard protection box, suitable for outdoor and remote control and protection of individual loads
Optional functional types: fire protection type (F type), isolation type (G type), leakage type (L type), communication type (T type), distribution type (P type)
Function and purpose
SSKBO adopts a modular single product structure, integrating traditional circuit breakers (fuses), contactors, overload (or overcurrent), phase failure protection relays, starters, isolators, motor comprehensive protectors, and other low-voltage electrical products. It has the main functions of remote automatic control and local direct manual control, panel indication and electromechanical signal alarm functions, overvoltage and undervoltage protection functions, phase failure and phase loss protection functions, undercurrent and underpower functions, and load regulation coordination time current protection characteristics (with four protection characteristics of overload inverse time limit, timed limit, short circuit instantaneous, and super short circuit instantaneous). By selecting functional modules or accessories as needed, various types of motor loads can be controlled and protected
SSKBO is mainly used for AC 50HZ (60HZ), rated voltage 690V, main rated current from 6.3 to 125A, intelligent control adjustable working current from 0.16 to 125A, and control motor power from 0.05KW to 55KW in power systems. It can connect, carry and disconnect current under normal conditions (including specified overload conditions), and can connect, carry and disconnect current under specified abnormal conditions (such as short circuits)
● Applicable fields
The SSKBO series products have a series of advantages, including integrated control and protection functions, modular and miniaturized structure, high protection level against environmental pollution, high ability to break short-circuit current, short arc distance, long service life, complete protection functions, high continuous operation performance and reliability, easy installation, use and maintenance operations. They are widely used in industrial infrastructure, fire protection systems, commercial and civil facilities ○ Distribution and motor protection and control systems in metallurgy, coal mining, steel, petrochemicals, ports, ships, railways and other fields
○ Motor Control Center (MMC) and Distribution Center
○ Power stations and substations
○ Port and railway systems (such as airports, railway and highway operation centers, etc.)
○ Highway lighting and ventilation system
○ Military stationed control and protection system (such as border posts, radar stations, etc.)
○ Fire pumps, fans, etc. for various occasions
Modern building lighting, power conversion, pumps, fans, air conditioning, fire protection, lighting, etc ○ Remote control lighting system
● Classification
○ Divided by protection objects: motor protection, distribution protection
○ Divided by operating frequency: frequent operation, infrequent operation
○ Divided by wiring method: front board, back board, plug-in
○ Divided by working principle: digital tube controller, LCD controller
● Main features
Compared to systems composed of discrete electrical appliances (see table below)
A、 Having the characteristic of self coordination between control and protection The SSKBO series control and protection switchgear integrates control and protection functions, equivalent to circuit breakers (fuses)+contactors+thermal relays+auxiliary appliances. It effectively solves the problem of matching protection and control characteristics between components that cannot or are difficult to solve with discrete components, making the coordination of protection and control characteristics more perfect and reasonable (with inverse time limit, timed limit, and instantaneous three-stage protection characteristics). As long as a single product is selected based on the load power or current, it can replace various electrical appliances that include self power supply input to the load end in the past, without reducing capacity, greatly reducing the workload of designers
B、 Unparalleled operational reliability and continuous system performance SSKBO can be put into use without maintenance after breaking the short-circuit current, which means it has continuous operation performance after breaking the short-circuit fault. After conducting the short-circuit current breaking test, SSKBO still has an AC-44 electrical life of more than 6000 times, which is difficult for systems composed of discrete components such as circuit breakers to achieve. This characteristic of SSKBO greatly improves the operational reliability and continuous operation of the system, with an operating short-circuit breaking capacity Ics of 80kA, which is internationally leading and the highest domestic indicator for similar products C、 Save materials and energy
SSKBO has the advantages of small size, small installation area, few contacts, low power consumption of the circuit, energy conservation, and material conservation ○ Technical Performance Comparison Table

● Main features
Compared with molded case circuit breakers, it has the characteristics of high breaking capacity and small arcing distance SSKBO has a short-circuit breaking capacity Ics (o-co co) of 80kA for high breaking type and 12KA for standard type at 380V rated operation. The breaking time under the expected short-circuit current of 12kA is only 2-3ms, and the current limiting coefficient is below 0.2, reaching the leading level of plastic shell circuit breakers and approaching the current limiting level of fuses. This greatly limits the dynamic and thermal impact of short-circuit current on the system, and the arcing distance is less than 30mm
Compared with the protection system composed of molded case circuit breakers, it has the characteristic that the protection setting current can be adjusted The SSKBO overload protection current can be adjusted on the panel according to the load power. The disadvantage of the short circuit protection setting current of the molded case circuit breaker that cannot be adjusted by the user after leaving the factory has been resolved by customer service. This has resulted in SSKBO products having excellent short circuit protection function even when installed at the end of the line and with low short circuit current
Compared with the performance of contactors, it has the characteristics of long service life and easy operation
The mechanical lifespan of SSKBO is 500-1000 cycles, and the electrical lifespan of AC-43 is 1.2-1.5 million cycles. It can be manually operated locally or automatically controlled remotely
● Other features
○ Complete supporting accessories
Auxiliary contacts and signal alarm contacts, panel operating mechanisms for doors or drawers, control circuit conversion modules, etc. can form a complete control and protection unit on a single product, with actual coordinated control and protection functions ○ Flexible installation angle
Horizontal installation, vertical installation, and horizontal installation do not affect the performance of use. It can be widely used in compact complete sets of equipment, including fixed or drawer type MCC cabinets, with unparalleled advantages over discrete components ○ Safe and reliable, with a high level of protection
The front, back, and plug-in terminals all have anti touch function and can be equipped with high protection level enclosures up to IP65. They are particularly suitable for damp places in civil buildings, basements, pump rooms, coal mines, ports, ships, petrochemicals, and other fields. They are ideal products to replace current electromagnetic starters, protective and combination starters ● Centralized control
Traditional products can only display and control one-to-one inside the cabinet. This product can connect multiple products to the main console through software protocol and 485 communication interface via bus for display and control. All parameters can be set through the main console, which can also be connected to the computer through protocol to achieve the "four remote" function. It is particularly suitable for MMC motor control centers

Outline and installation dimensions of three pole basic products