EWY Surge Protective Device RAV-781BWZ-4 RAV-781BWZ-5 Single phase Power Line Surge Protector Compatible with okaya Product Overview Prevent or substantially minimize the occurrence of arcing and noise generation in relay and switch contacts. Spark quenchers are electronic components designed to prevent or substantially minimize the occurrence of arcing and noise generation in relay and switch contacts. Spark quenchers consist of specially designed capacitors and resistors connected in series. Spark discharges and induced noise are absorbed over a wide range by the accumulation characteristic and impedance of the capacitor, while the RC time constant delays and averages surge voltage and oscillations. FEATURES AT A GLANCE EWY spark quenchers have the following characteristics which make it possibleto use in a wide range of applications: Large overload capacity. Not polarized: can be used in both AC and DC circuits. Favorable effect on surge voltage and accompanying. oscillations caused by contact chatter. Effective against spurious potentials having magnitudes below circuit voltage. Offers a high degree of protection for semiconductor devices, and as thyristors and SCRs. Improves dv/dt ratio . Why need to install an arc extinguisher (RC resistance-capacitor absorber) Because of the self-induction of the coil when using electronic equipment accessories. a reverse voltage of energy current will occur. In general.when a circuit contact is opened and closed, a voltage is generated at the contact, a current flows when the contact is closed, and a self-induced voltage occurs when it is opened. At the same time, a spark is generated, which forms an are and generates high-frequency vibration, which will cause damage to the electronic circuit. The life of the contact is reduced due to the loss, deformation, increase in melting casting and surface acidification resistance, and poor contact caused by the spark at the contact. In order to prevent the occurrence of electric sparks, an accessory that can recover the circuit spark is inserted betwoon. the contacts. This accessory is. an electrio spark eliminator; an arc extinguisher. and ani RO resistance capacitor absorber. Features 1. It has excellent adaptability and can absorb sharp pulse voltage. 2. Has excellent limiting voltage characteristics. 3. The power to absorb the surge is great. 4. Not only has the characteristics of symmetrical voltage and current, but also has the ability to capture positive / negative surges. 5. High rated power and high reliability. Range of application VARIOUS MACHINERY MACHINE TOOL AUTOMATED MACHINERY COILS OF CONTACTORSSOLENOID VALVESRELAYS, ETC. Product Paramenters 1 Description 250V AC Single phase Power Line Surge Protector 2 Place of Origin Taiwan, China