參數(shù)資料
型號(hào): P1804U
英文描述: solid state crowbar devices
中文描述: 固態(tài)撬棍設(shè)備
文件頁(yè)數(shù): 117/212頁(yè)
文件大小: 1877K
代理商: P1804U
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Primary Protection
2002 Teccor Electronics
SIDACtor
Data Book and Design Guide
3 - 29
http://www.teccor.com
+1 972-580-7777
R
Primary Protection
Primary telecommunications protectors must be deployed at points where exposed twisted
pairs enter an office building or residence. This requirement is mandated in North America
by the National Electric Code (NEC) to protect end users from the hazards associated with
lightning and power cross conditions.
Primary protection is provided by the local exchange carrier and can be segregated into
three distinct categories:
Station protection — typically associated with a single twisted pair
Building entrance protection — typically associated with multiple (25 or more) twisted
pair
Central office protection — typically associated with numerous twisted pair feeding into a
switch
Station protectors provide primary protection for a single-dwelling residence or office. The
station protector is located at the Network Interface Unit (NIU), which acts as the point of
demarcation, separating the operating company’s lines from the customer’s.
Building entrance protection is accomplished by installing a multi-line distribution panel with
integrated overvoltage protection. These panels are normally located where multiple twisted
pairs enter a building.
A five-pin protection module plugged into a Main Distribution Frame (MDF) provides Central
and Remote Office protection. Like station and building entrance protection, the MDF is
located where exposed cables enter the switching office.
Teccor also offers a full line of five-pin protectors. For further details, contact factory at
protectionsystems@teccor.com or +1 972-580-7777.
Protection Requirements
Station protectors must be able to withstand 300 A 10x1000 surge events. The building
entrance protectors and CO protectors must be able to withstand 100 A 10x1000 surge
events. Figure 3.36 shows building entrance protector and CO protector asymmetrical
solutions. Figure 3.37 shows building entrance protector and CO protector balanced
solutions.
The following regulatory requirements apply:
UL 497
GR 974-CORE
ITU K.28
Primary Protection Reference Circuit
Figure 3.36 and Figure 3.37 show different configurations used in primary protection. Note
that the peak off-state voltage (V
DRM
) of any device intended for use in primary protection
applications should be greater than the potential of a Type B ringer superimposed on a
POTS (plain old telephone service) battery.
150 V
RMS
2 + 56.6 V
PK
= 268.8 V
PK
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參數(shù)描述
P1804U_L 制造商:LITTELFUSE 制造商全稱:Littelfuse 功能描述:Mutiport SIDAtor
P1804UALRP 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 4Chp 170/340V 50A RoHS:否 制造商:Bourns 轉(zhuǎn)折電流 VBO:40 V 最大轉(zhuǎn)折電流 IBO:800 mA 不重復(fù)通態(tài)電流: 額定重復(fù)關(guān)閉狀態(tài)電壓 VDRM:25 V 關(guān)閉狀態(tài)漏泄電流(在 VDRM IDRM 下): 保持電流(Ih 最大值):50 mA 開(kāi)啟狀態(tài)電壓:5 V 關(guān)閉狀態(tài)電容 CO:120 pF 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AA
P1804UALTP 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 4Chp 170/340V 50A RoHS:否 制造商:Bourns 轉(zhuǎn)折電流 VBO:40 V 最大轉(zhuǎn)折電流 IBO:800 mA 不重復(fù)通態(tài)電流: 額定重復(fù)關(guān)閉狀態(tài)電壓 VDRM:25 V 關(guān)閉狀態(tài)漏泄電流(在 VDRM IDRM 下): 保持電流(Ih 最大值):50 mA 開(kāi)啟狀態(tài)電壓:5 V 關(guān)閉狀態(tài)電容 CO:120 pF 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AA
P1804UALXX 制造商:LITTELFUSE 制造商全稱:Littelfuse 功能描述:SIDACtor?? Multiport Series MS-013 are designed to protect baseband equipment
P1804UARP 功能描述:硅對(duì)稱二端開(kāi)關(guān)元件 4Chp 170/340V 50A RoHS:否 制造商:Bourns 轉(zhuǎn)折電流 VBO:40 V 最大轉(zhuǎn)折電流 IBO:800 mA 不重復(fù)通態(tài)電流: 額定重復(fù)關(guān)閉狀態(tài)電壓 VDRM:25 V 關(guān)閉狀態(tài)漏泄電流(在 VDRM IDRM 下): 保持電流(Ih 最大值):50 mA 開(kāi)啟狀態(tài)電壓:5 V 關(guān)閉狀態(tài)電容 CO:120 pF 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AA