Download>Category>IC Design and Manufacturing>Polymer PTC thermistor isolation transformer line protection

pdf

Polymer PTC thermistor isolation transformer line protection

2013-09-22
17.69KB
Points it Requires : 2

repReport

Document Introduction
You Might Like
Recommended Downloads

Polymer PTC thermistor isolation transformer line protection isolation transformer is widely used in various low-voltage circuits to provide power for low-voltage equipment. When there are abnormal conditions such as overload and load short circuit, the transformer will be damaged due to excessive current, or even catch fire. This cannot meet the requirements of the relevant standards for isolation transformers, such as IEC742 or EN60742, which stipulates that the temperature of the isolation transformer cannot exceed 125oC when the secondary winding of the isolation transformer is short-circuited, and UL1310 and UL1585 stipulate that the current must be limited to less than 8A within 5 seconds. If a suitable polymer PTC thermistor of our company is connected in series in the secondary coil of the transformer, it can be easily met. Compared with some ceramic PTC thermistors, our polymer PTC thermistors have the advantages of low impedance and low temperature after protection. The usual protection circuit is shown in the figure. In order to prevent the induced voltage generated at both ends of the coil from damaging the circuit when the PTC thermistor is activated, it is recommended to add a varistor to the secondary coil.

unfold

You Might Like

Uploader

: jujuyaya222

Recommended ContentMore

Open source project More

Popular Components

Searched by Users

Just Take a LookMore

Configuration of TI C64X DSP interrupt vector table (hardware interrupt)
1. Write an interrupt service routine Write an ISR function c_intXX in the .c source file for interrupt processing, such as: interrupt void c_intXX (void) { …; } Note: For hardware interrupts, XX = 00
Electronic circuit analysis
What is the role of R1, R2 and C4 in this circuit? How are their values selected?
The avr-iot discount purchase event that PIC held some time ago! Is it true that China cannot connect to Google's cloud service?
The avr-iot discount purchase event that PIC held some time ago! Is it true that China cannot connect to Google's cloud service?
When I was routing in AD, why did the wire not connect to the pad even though I clicked the left button on it? Please help me see
When I was routing in AD, why did the wire not connect to the pad even though I clicked the left button on it? Please help me see Why is the wire not connected to pad 1 when the left mouse button is c
Isn't this scope a prohibited item?
I often see this kind of scope for sale on a certain enthusiast forum. At that time, I thought that the buyers and sellers were really bold. I checked on JD today and found similar products in bulk, a
Why does the power supply protect itself?
Do you know all about LC resonant circuit?
Wireless Communication Principles Hotspot Technology
Application of Ethernet on MCU
Calling TI display tool mmwave demo visualizer

Trending Downloads

Trending ArticlesMore

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

About Us Customer Service Contact Information Datasheet Sitemap LatestNews

Room 1530, 15th Floor, Building B, No.18 Zhongguancun Street, Haidian District, Beijing, Postal Code: 100190 China Telephone: 008610 8235 0740

Copyright © 2005-2024 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号京ICP备10001474号-1 电信业务审批[2006]字第258号函

京公网安备 11010802033920号

×