bourns气体放电管选型手册.pdf

® Bourns Gas Discharge Tubes Short Form Brochure ® Bourns GDT Product Overview Introduction Customers in many different industries rely on Bourns® Bourns offers GDTs in six unique families: Long Life, Gas Discharge Tubes (GDTs) to protect an ever increasing Premium, High-Voltage, High Current, Hybrid and Fast array of electronic equipment. Bourns engineers have Acting. This broad offering of GDT devices addresses the innovated and improved GDT technology by designing diverse protection needs of next generation electronics. devices with faster response times, low capacitance, and smaller sizes while at the same time increasing impulse life performance. GDT Operation GDT Types GDT devices are designed to prevent damage from Bourns offers a broad range of 2-electrode and 3-electrode transient disturbances by acting as a “crowbar”, virtually a GDT devices. 2-electrode GDTs are single chamber short circuit. When an electrical surge exceeds the GDT’s devices designed to provide protection to single lines defined sparkover voltage, the GDT becomes ionized and referenced to another line or ground. 3-electrode GDTs conduction takes place within a fraction of a microsecond provide dual line protection from either line to ground diverting surge current to ground. When the surge or line to line (L1-G; L2-G or L-L). Bourns® GDTs are event subsides and the system voltage returns to normal