- 您现在的位置：买卖IC网 > PDF目录205969 > XCE7A POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT PDF资料下载
参数资料
| 型号： | XCE7A |
| 元件分类： | 功率/信号继电器 |
| 英文描述： | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| 文件页数： | 10/14页 |
| 文件大小： | 2057K |
| 代理商： | XCE7A |
Application notes
N°101
DERATING OF CONTACTS FOR DC VOLTAGES
ABOVE NOMINAL RATING
To establish a standard for the derating of relay contacts is, at best, a subjective practice. Limitations are governed by the type
of relay, contact gap, maximum voltage capabilities of the relay contact system, and the contact material.
The most common method is to derate the contacts by use of the Power Formula, using the known current and voltage.
This method is valid only for Resistive Loads, and is an approximation only; keeping in mind the limitations mentioned above.
Power = IE (Current x Voltage)
I2 E2 = 2/3 I1E1
Example:
A designer is working with a 55 volt DC system and has a relay rated at 10 amps resistive at 28 volts DC.
What is the maximum current that can be switched at 55 Vdc.
I1 = 10 Amperes
E1 = 28 VDC
E2 = 55 VDC
I2 = ? (Current ratings at 55 VDC Resistive)
I2 E2 = 2 I1 E1/3
I2 = 2 I1 E1/E23
= 2 (10 x 28)/55 x 3
= 560/165
I2 = 3.4 Amperes at 55VDC
In addition, the user should always be concerned about the following:
1. Derating contacts that are rated for less than 10 Amperes at nominal voltage.
2. Derating contacts for use in system voltages above 130 Volts DC
Date of issue: 6/00
- 14 -
Page 1 of 1
相关PDF资料 |
PDF描述 |
|---|---|
| XCE7B | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.096A (COIL), 12VDC (COIL), 1152mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCE7C | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.3A (COIL), 6VDC (COIL), 1800mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCE7M | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.03A (COIL), 48VDC (COIL), 1440mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCE7N | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCE7R | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.096A (COIL), 12VDC (COIL), 1152mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XCEC01 | 制造商:Excelsys Technologies 功能描述:CONF POWER CHASSIS 1340W 6 SLOT |
| XCEL-10 SSD | 制造商:SMART Modular Technology Inc 功能描述:SLC SSD FLASH - Trays |
| X-CELL MAJOR | 制造商:NITECH 功能描述:BATTERY PJ996 6V |
| X-CELL PLUS | 制造商:NITECH 功能描述:BATTERY CAMCORDER PJ996 6V |
| XCENET00 | 制造商:Red Lion Controls 功能描述:ETHERNET EXPANSION CARD FOR DSP & MOD CONTROLLER, 10 BASE T/100 BASE-TX |
发布紧急采购，3分钟左右您将得到回复。