KB0 Control and Protection Switchgear

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 main feature of CPS series control and protection switchgear is to achieve integrated and internally coordinated control and protection functions on a single structural form of product. It 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. CPS 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 capacity, small arcing distance, long service life, and adjustable protection setting current. It is easy to operate and has a variety of supporting accessory modules, which can achieve control and protection of motor loads and distribution loads.

The emergence of CPS 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 inconsistent protection characteristics and control characteristics when combining electrical products with different assessment standards, greatly improving the operational reliability and continuous performance of control and protection systems.

The first generation of CPS series control and protection switchgear products have a relatively large volume and use bimetallic strip technology for protection. Although the second-generation product solved the problem of large volume. But there hasn't been any major breakthrough in protection technology. With the increasing application and deepening of microelectronics technology in the low-voltage electrical industry, our company aims at this opportunity and takes the path of high-end product design based on the latest microelectronics technology. On the basis of KB0 series products, we have invested heavily in the development of HBCPS series control and protection switchgear with international advanced level. Overcoming the shortcomings of KB0 series products, it combines the advantages of low-voltage electrical discrete components, with complete functions and reliable performance. This provides a fundamental component for simplifying and optimizing low-voltage distribution and control systems. The HBCPS series control and protection switchgear is the best upgraded product of KB0.

Product Features

HBCPS adopts a modular single product structure, integrating the main functions of traditional low-voltage electrical products such as circuit breakers (fuses), contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators, and motor comprehensive protectors. It has remote automatic control and local direct manual control functions, panel indication and electromechanical signal alarm functions, overvoltage and undervoltage protection functions, phase failure and phase loss protection functions, undercurrent and underpower functions, and coordinated 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, control and protection of various types of motor loads and distribution loads can be achieved.

HBCPS is mainly used in power systems with AC 50Hz (60Hz), rated voltage up to 690V, main rated current from 6.3A to 125A, adjustable working current of intelligent controllers from 0.16A to 125A, and controlled motor power from 0.05KW to 55KW to 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).

Main technical parameters

Two external installation dimensions: 125 type (D frame) and 63 type (C frame).

The number of poles in the main circuit is divided into three poles and four poles.

The basic configuration of HBCPS control and protection switchgear is: 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, and the current limiting coefficient is 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 3 normally open, 2 normally closed+1 short circuit overload. It can also be combined according to user requirements, but the maximum number of contacts cannot exceed 11 pairs.

The rated current of the intelligent controller is Ie: 0.4/2.5/4/6.3/12/16/18/25/32/40/45/50/63/80/100/125A.

The rated current of the main body is ln: 12/16/18/32/45/63/100/125A.

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: 220V, Q: 380V