حفاظت مدار محدودکننده‌های ولتاژ گذرا (تی وی اس) فناوری ترکیبی

Product Attributes

Introduction

The TISP8210MD / TISP8211MD protector combination has been designed to protect dual polarity supply rail SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning and a.c. power contact and induction. Both devices have been designed using the latest understanding of programmable protector technology to maximize performance. The TISP8210MD and TISP8211MD are complementary programmable protection devices. The program or gate pins (G1, G2) are connected to the positive and negative SLIC battery supplies to give protection which will track the SLIC supply levels. The integrated transistor buffer is an essential element in this type of device as the current gain of around 150 reduces battery loading to below 5 mA during a.c. power induction or power contact conditions. Additionally the Base - Emitter junction acts as a reverse blocking diode during operation preventing unnecessary loading of the power supply. The TISP8210MD / TISP8211MD combination is designed to be used in conjunction with the 12.5 Ω Line Protection Module (LPM). With this solution the application should pass Telcordia GR - 1089 - CORE testing with the 4A12P - 1AH - 12R5 acting as the overcurrent protector and coordination element. The TISP device plus LPM solution is designed to work in harmony with the system primary protectors. GR - 1089 - CORE issue 3 lists test to allow for three types of primary protection: Carbon Block (1000 V); Gas Discharge Tube (600 V) and Solid State (400 V). This solution is designed to be used with the GDT and Solid State options. Under lightning conditions the current through the 12.5 Ω LPM will be 48 A [600 V / 12.5 Ω], which is well within the 60 A capability of the TISP8210MD / TISP8211MD combination.

Features

• Wide 0 to -110 V Programming Range (TISP8210MD)
• Low +5 mA Max. Gate Triggering Current (TISP8210MD)
• High -150 mA Min. Holding Current (TISP8210MD)
• Wide 0 to +110 V Programming Range (TISP8211MD)
• Low -5 mA Max. Gate Triggering Current (TISP8211MD)
• ±20 mA Min. Holding Current (TISP8211MD)
• UL Recognized Component