overvoltage protection การใช้

• These insulators also have to be equipped with overvoltage protection equipment.
• Excluded from CPE are overvoltage protection equipment and pay telephones.
• Some numerical relays can be used to provide inverse time overvoltage protection or negative sequence overcurrent protection.
• Great care should be taken while designing overvoltage protection unit of electronic devices, because e . g.
• In June 2015, Mersen acquires ASP, a Chinese leader specialized in overvoltage protection ( surge protection devices ).
• The SSU has an overvoltage protection feature to maintain the output voltage below 200 V DC maximum for all operating conditions.
• The characteristic of a TVS requires that it respond to overvoltages faster than other common overvoltage protection components such as varistors or gas discharge tubes.
• For overvoltage protection the whole powerline is equipped with two ground conductors, which are installed on a separate crossbar on the top of the pylons.
• Computer power supplies may have short circuit protection, overpower ( overload ) protection, overvoltage protection, undervoltage protection, overcurrent protection, and over temperature protection.
• Two types of overvoltage protection devices are currently used : clamping, which passes through voltages up to a certain level, and foldback, which shunts voltage away from the load.
• :: Well, of these 3 choices, ( 1 ) is not really an option-- the pump gets its power directly from the mains with no voltage regulation ( other than overvoltage protection ) . ( 2 ) is actually OK-- I expect the blowdown volume to be small, and although the liquid is somewhat hazardous ( dilute phosphoric acid with copper salts ), the discharge line will drain it directly into a waste container . ( 3 ) is possible, but will add cost and complexity.
• A varistor provides no equipment protection from inrush current surges ( during equipment startup ), from overcurrent ( created by a short circuit ), or from voltage sags ( also known as a power disturbances is defined by other aspects of the system design, either inside the equipment itself or externally by means such as a UPS, a voltage regulator or a surge protector with built-in overvoltage protection ( which typically consists of a voltage-sensing circuit and a relay for disconnecting the AC input when the voltage reaches a danger threshold ).