在线客服系统
News

News

Its main business is the production, manufacture and sales of electrical equipment and testing instruments.

News

News HOME >> News

Basic Knowledge of Harmonics

I、 Concept: Refers to the distortion of current or voltage waveforms, which is a sine wave component that is an integer multiple of the fundamental frequency. For example, in a 50Hz power system, 100Hz, 150Hz, 200Hz, etc. are all harmonics.

II、 Causes: Mainly caused by nonlinear loads, such as frequency converters, switching power supplies, arc furnaces, rectifiers, and other equipment.

III、 The hazards of harmonics:

1. Equipment overheating: Harmonics increase the copper and iron losses of the equipment, causing an increase in equipment temperature and shortening its service life.

2. Protection device misoperation: Harmonics may cause relay protection device misoperation, leading to unnecessary power outages.

3. Communication interference: High frequency harmonics may cause interference to communication signals, affecting communication quality.

4. Measurement error: Harmonics can affect the measurement accuracy of the electricity meter.

5. Power factor reduction: Harmonics will reduce the power factor of the system, increase reactive power, and cause energy waste.


HZ-9003C Multifunctional Partial Discharge Tester


1733793460787522.jpg


Email sales04@bdhuazheng.com Mobile +86 18330222302 WhatsApp +86 18330222302 Wechat +86 18330222302 Wechat +86 18330222302 Back