JDO/KBO series control and protection switchgearDetailed product description：

KBO is mainly used in power systems with AC 50Hz (6OHz), rated voltage up to 690V, and current ranging from 0.16A to 100A to connect, carry, and disconnect currents under normal conditions, including specified overload conditions, and to connect, carry, and disconnect currents under specified abnormal conditions (such as short-circuit currents).

3. Function:
KB0 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. It has remote automatic control and local direct manual control functions, panel indication and electromechanical signal alarm functions, and coordinated time current protection characteristics (with inverse time limit, timed limit, and instantaneous three-stage protection characteristics). By selecting functional modules or accessories as needed, control and protection can be achieved for general (infrequent starting) motor loads, frequent starting motor loads, and distribution circuit loads.

Product type:
The configuration of KBO basic products is shown in Figure 1-3, and the electrical schematic of basic products is shown in Figure 1-4.
Reversible Control and Protection Switchgear KBON: Using KBO basic type as the main switch, combined with mechanical interlocking and electrical interlocking accessories, it forms a reversible control and protection switchgear, suitable for reversible or bidirectional control and protection of electric motors.
Dual power automatic transfer switch electrical appliance KBOS: Products with a rated current of 100A and below use the KB0 basic type as the main switch, combined with voltage relays, mechanical interlocks, electrical interlocks, and other accessories to form a CB level to PC level dual power automatic transfer switch electrical appliance ATSE; The ATSE with a rated current of 250A-630A is PC grade.
The pressure reducing starter KB0J, KB0J2, KB0Z, KB0R: KB0 is used as the main switch, combined with appropriate contactors, time relays, mechanical interlocks, electrical interlocks, and other accessories to form the Y-△ pressure reducing starter KB0J and the autotransformer pressure reducing starter KB0Z, which are suitable for pressure reducing starting control and protection of electric motors.
Dual speed controller KB0D: Using KB0 as the main switch, combined with appropriate contactors, mechanical interlocks, and electrical interlocks, it forms a dual speed controller suitable for starting control and protection of dual speed motors.
Three speed controller KB0D3: Using KB0 as the main switch, combined with appropriate contactors, mechanical interlocks, and electrical interlocks, it forms a dual speed controller suitable for starting control and protection of dual speed motors.
The protection control box XBK1: KB0 serves as the main switch and is installed in a standard protection box to form a power terminal box, suitable for outdoor and remote control and protection of individual loads.
Derivative types: fire protection type (F type), isolation type (G type), plug-in board wiring (R type), etc.

Applicable fields of KB0:
KBO has the advantages of functional integration, modular structure, small size, high protection level, high breaking capacity, short arcing distance, long service life, continuous operation, high reliability, and easy installation, use, and maintenance operation. It is particularly suitable for motor control and protection systems in metallurgy, coal mining, steel, petrochemicals, ports, ships, railways, and other fields. Electrical control and protection for lighting, power conversion, pumps, fans, air conditioning, etc. in modern buildings.
Motor Control Center (MCC), especially for intelligent electrical control systems or MCC with high breaking capacity requirements (such as distribution and protection systems that require Icu or Ics to reach 80kA). Single machine control and protection in factories or workshops (equivalent to power terminals).

Main parameters:
Two external dimensions (frame codes C and D respectively)
The number of poles in the main circuit is divided into three poles and four poles.
Rated current level of the main body; 12A 16A 18A 32A 45A63A 100A.
The setting current range covered by the overload release (controller) that can be equipped: minimum setting current 0.16A, maximum setting current 100A
Short circuit breaking capacity level: Economic type (C) 35kA. Standard type (Y) 50kA. High breaking type (H) 80kA
The expected breaking time under short-circuit current is 2-3ms, with a current limiting coefficient below 0.2.
Form of overload release:
According to the working principle, it can be divided into: thermal magnetic release (including basic and fire protection types, M P F L, etc.) intelligent controller
Electronic controllers are divided into motor protection and distribution protection according to the protected objects, and are classified into frequent operation and infrequent operation according to the operating frequency
C. The external dimensions and installation methods of the D-frame thermal magnetic release, intelligent controller, and electronic controller are completely consistent. (ID-357715118443535)