What are Electrical Failures?

Date:2019-03-01 02:25:53 click:1433

Electrical equipment has been widely used in production, and electrical Failures are inevitable, so do you know what electrical Failures are?


In actual work, we will encounter different electrical faults. The generation of electrical faults is very strange. The methods and methods of troubleshooting can only be determined according to the specific conditions of the faults. There are no strict modes and methods. For some maintenance personnel. It will be difficult. In the process of troubleshooting, there are often many detours and even large losses. As a maintenance electrician, in the event of an electrical failure, it is of great significance to accurately identify the cause of the failure and properly and correctly eliminate the failure, which is to improve labor productivity, reduce economic losses and safe production.

 

According to the characteristics of electrical devices,  electrical faults can be divided into three categories:

 

1. Power failure: lack of power supply, voltage, frequency deviation, polarity reversal, reverse phase and neutral line, lack of one phase power supply, phase sequence change, AC and DC confusion.

2. Circuit failure: disconnection, short circuit, short circuit, grounding, wiring error.

3. Equipment and component failure: overheated, inoperable, electrical breakdown, and poor performance. Analysis of the cause of the fault based on the fault phenomenon is the key to finding an electrical fault.

 

The basis of the analysis is the basic theory of electrician, which is a comprehensive understanding of the structure, principle and performance of the electrical device, and is the actual combination with the fault. There may be many reasons for an electrical fault. It is important to find the most important cause among many reasons and use methods to troubleshoot.

 

From the perspective of the electrical industry, the related electrical faults are mainly divided into 7 aspects.

 

 

Picture

Cause

Effect

Electric Disturbances

 

Electromagnetic or Radio Frequency noise propagating through AC lines, commutations in the distribution system, electric motors, non-linear loads, inadequate grounding, lightning discharges

Inadequate operation of electronic equipment, shortened useful life.

 

Voltage Spikes

 

Electromagnetic or Radio Frequency noise propagating through AC lines, commutations in the distribution system, electric motors, non-linear loads, inadequate grounding, lightning discharges.

 

Permanent damage to electronic devices.

 

Under Voltage

Energy generation and transportation issues, grid overload, being at the far end of an overloaded line, proximity to heavy electrical loads.

 

Energy generation and transportation issues, grid overload, being at the far end of an overloaded line, proximity to heavy electrical loads.

 

Over Voltage

Energy generation and transportation issues, grid imbalances, being close to improperly set distribution substations, proximity to highly variable electrical loads.

 Impeded normal function of connected devices, reduced useful life, permanent damage.

 

Brownouts

 

Faults in the generation, transmission and commutation system; sometimes of very short duration, not easy to detect without monitoring equipment.

 

Shortened useful life of devices, operational interruptions, loss of information.

Power Outages

 

Faults in the generation, transmission and commutation system; external phenomena: trees, animals, telluric movements, system overload.

 

Shortened useful life of devices, operational interruptions, loss of information, inability to operate, stress.

 

Voltage Variations

 

Connection and disconnection of large loads associated to overloaded, poorly designed or poorly maintained grid.

 

Abnormal behavior of connected devices, reduced useful life.