- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385475 > LM1851 (National Semiconductor Corporation) Ground Fault Interrupter PDF資料下載
參數(shù)資料
| 型號： | LM1851 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Ground Fault Interrupter |
| 中文描述： | 接地故障遮斷 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 165K |
| 代理商： | LM1851 |
Application Circuits
(Continued)
in practice, the actual value of C1 will have to be modified to
include the effects of the neutral loop upon the net charging
current. The effect of neutral loop induced currents is diffi-
cult to quantize, but typically they sum with normal fault cur-
rents, thus allowing a larger value of C1.
For UL943 requirements, 0.015
m
F has been found to be
the best compromise between timing and noise.
For those GFI standards not requiring grounded neutral de-
tection, a still larger value capacitor can be used and better
noise immunity obtained. The larger capacitor can be ac-
commodated because R
N
and R
G
are not present, allowing
the full fault current, I, to enter the GFI.
In Figure 2, grounded neutral detection is accomplished by
feeding the neutral coil with 120 Hz energy continuously and
allowing some of the energy to couple into the sense trans-
former during conditions of neutral fault.
Typical Application
TL/H/5177–6
*
Adjust R
SET
for desired sensitivity
FIGURE 2. 120 Hz Neutral Transformer Approach
6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM1851M | Ground Fault Interrupter |
| LM1851N | Ground Fault Interrupter |
| LM185B | MICROCIRCUIT DATA SHEET |
| LM185BE | MICROCIRCUIT DATA SHEET |
| LM185BE883 | MICROCIRCUIT DATA SHEET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM185-1.2 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Micropower Voltage Reference Diode |
| LM185-1.2_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Micropower Voltage Reference Diode |
| LM185-1.2-N | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM185-1.2-N/LM285-1.2-N/LM385-1.2-N Micropower Voltage Reference Diode |
| LM185-1.2-N_13 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM185-1.2-N/LM285-1.2-N/LM385-1.2-N Micropower Voltage Reference Diode |
| LM185-1.2QML | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM185-1.2QML Micropower Voltage Reference Diode |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。