Home page

Oscillatory wave immunity test

　　1. Overview

　　Oscillatory waves appear as:

　　a) non-repetitive damped oscillatory transients (ringing waves) occurring in low-voltage power lines, control lines and signal lines of public and non-public networks;

　　b) Repeated damped oscillatory waves in power, control and signal cables installed in high voltage and medium (HV/MV) substations.

　　The oscillatory transient wave of a single shock is called a ring wave, and the pulse train of a damped oscillatory transient is called a damped oscillatory wave.

　　The ringing wave is caused by the switching of the control line of the power box or the lightning strike, and appears on the terminals of the equipment.

　　Damped oscillatory waves appearing on equipment terminals are mainly caused by reignition of switching operations in power plants, high and medium voltage substations and heavy industrial equipment.

　　Ringing waves are reproducible transients that occur on high or medium voltage power, control, and signal lines.

　　Damped oscillatory waves are representative of HV and MV substations, especially with regard to HV busbar switch operation, as well as background disturbances in plants. The opening and closing operation of the knife switch in the substation will produce a very steep (wave front time of tens of ns) transient voltage wave.

　　Due to the mismatch of characteristic impedance in the high voltage circuit, the voltage wave will have reflection. According to this point of view, the characteristics of the transient voltage and current in the high-voltage bus are determined by the line length and propagation time to determine the fundamental frequency. The outdoor substation is affected by the above parameters and the length of the busbar (the length of the busbar can range from tens of meters to hundreds of meters, such as a typical value of 400 meters), and the oscillation frequency ranges from about 100kHz to several megahertz. In this regard, 1MHz oscillation Frequency can represent most cases. But for large-scale high-voltage substations, 100kHz is considered more appropriate.

Ring wave waveform (open circuit voltage and short circuit current)

Damped Oscillatory Waveform

　　2. Test system layout:

Layout of desktop equipment :

　　3. System Configuration

serial number	product	illustrate	brand
3.1	OCS 500N6F.3	Fast damped oscillatory wave simulator , conforming to IEC 61000-4-18 standard , built-in three-phase coupling / decoupling network , 3*400V AC (pp)/32A ; with USB- optical remote control interface , including optical fiber link	EM TEST/ Switzerland
3.2	S-DOW/N6F	Slow Damped Oscillatory Wave Module for OCS 500N6F Series, IEC 61000-4-18 Compliant	EM TEST/ Switzerland
3.3	CA OCS F Kit	Calibration kit for OCS 500N6F series; including 1 KW 1000, 1 KW 0R1, CA MA F and plastic case	EM TEST/ Switzerland
3.4	CNV 504N5.1	3kV coupling and decoupling network, 4 wires, used for 100KHz and 1MHz oscillatory wave test, coupling capacitance 0.5uF, R = 100 Ohm, decoupling inductance >1.5mH; rated voltage / current 50V/4A	EM TEST/ Switzerland
3.5	CNV 508N4	3kV coupling and decoupling network, according to the standard IEC 60255 , 8 wires, used for 1MHz oscillatory wave test, coupling capacitor 0.5uF, decoupling inductor > 1.5mH; rated voltage / current 250V/4A	EM TEST/ Switzerland
3.7	iec.control 1	Remote control and report generation software that can control 1 test equipment, suitable for UCS , EFT , VCS , PFS , TSS and other test equipment	EM TEST/ Switzerland
3.8	Control-tab	computer	Wisdom / China
3.9	EMS-TAB	EMS test environment, including test table, horizontal coupling board, insulation support, etc., including vertical equipment / desktop equipment. Specifically includes a 2.021.020.8m solid wood test table, a 2.01.0m1.2mm thick galvanized steel plate; 3m2m , thickness: 1.2mm , a set of hinged ground reference boards; 2 meters of copper braid 1 grounding wire ; 2 grounding copper noses ; 4 sets of M8 wing nuts, bolts (length 25mm ), flat gaskets ; 2 sheets of EPE pearl cotton 11050*5cm ;	Wisdom / China

Century Wisdom (Suzhou) Testing Technology Co., Ltd

www.300.cn nanjing SEO

Business License

全部

全部
产品管理
新闻资讯
介绍内容
企业网点
常见问题
企业视频
企业图册