Circuit breaker quality appraisal

A circuit breaker refers to a device that cuts off current, just like a faucet. It controls the water flow, while the circuit breaker controls the current.

circuit breaker is mainly used to protect the circuit from short-circuit current. When a short-circuit occurs in the circuit, it immediately disconnects the circuit to protect the safety of the load. The rated breaking capacity of the circuit breaker is divided into two types: rated limit short-circuit breaking capacity and rated operating short-circuit breaking capacity.

Zhongke Testing and Appraisal Institute can provide circuit breaker quality appraisal services and make accurate appraisals in terms of product design analysis, load analysis and product quality analysis.

0

1

1, according to the scope of use, it can be divided into high-voltage circuit breakers and low-voltage circuit breakers.

2. According to the number of poles, it can be divided into unipolar, two-level, three-level and four-level.

3, according to the installation method, it can be divided into plug-in type, drawer type and fixed type.

0

1

GB/T 16916.1-2014 Residual current circuit breakers (RCCB) without overcurrent protection for household and similar purposes

GB/T 10963.3-2016 Overcurrent protective circuit breakers for household and similar purposes Part 3: Circuit breakers for direct current

GB/T 10963.1-2020 Electrical accessories Overcurrent protective circuit breakers for household use and similar places Part 1: Circuit breakers for AC use

GB/T 10963.2-2020 Electrical accessories Overcurrent protective circuit breakers for household use and similar places Part 2: Circuit breakers for AC and DC

GB/T 17701-2008 Circuit breaker for equipment

0GB/T 1984-2014 High-voltage AC circuit breaker

1

2GB/T 42009-2022 High-voltage AC circuit breaker for filter

3

4GB/T 14824-2021 High voltage alternator circuit breaker

5

6GB/T 24838-2018 1100kV high voltage AC circuit breaker

7

8GB/T 34581-2017 General technical requirements for DC circuit breakers for photovoltaic systems

9

0GB/T 22710-2008 Electronic controller for low voltage circuit breakers

1

2GB/T 29323-2012 Technical requirements for 1 000kV circuit breaker protection devices

3

4GB/Z 22074-2016 Plastic case circuit breaker reliability test method

5

6

7

8

9

0

1

A certain city's Market Supervision and Administration Bureau carried out quality supervision and random inspections of circuit breakers and randomly inspected 29 batches produced by 29 companies. Entrusted by the Market Supervision and Administration Bureau, a third-party forensic appraisal agency is responsible for the quality appraisal of circuit breakers.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information, on-site investigation and inspection data, and inspection and testing data of the "circuit breaker" involved in the case, and made the following quality analysis opinions:

This spot check found that 4 batches of products related to safety performance indicators did not meet the standard requirements. The unqualified items involved were: operating characteristics and performance under operating short-circuit capability;

had 1 batch that did not meet the requirements for usability indicators, and the unqualified items involved were: logos.

0

1

2

3

4

5