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参数资料
| 型号： | XG2A |
| 元件分类： | 功率/信号继电器 |
| 英文描述： | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| 文件页数： | 12/16页 |
| 文件大小： | 1015K |
| 代理商： | XG2A |
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
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相关PDF资料 |
PDF描述 |
|---|---|
| XE4N | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XE4B | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.096A (COIL), 12VDC (COIL), 1152mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XA4V | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.3A (COIL), 6VDC (COIL), 1800mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XA4N | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XA2V | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.3A (COIL), 6VDC (COIL), 1800mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| X-G2A | 制造商:Leach International Corporation 功能描述:EM RLY DPDT 5A 28VDC 500OHM SCKT - Bulk |
| XG2A1001 | 制造商:Omron Electronic Components LLC 功能描述:CONN IDC CONN F 10 POS 2.54MM IDT RA TH - Bulk 制造商:Omron Electronic Components LLC 功能描述:CONN SOCKET IDC 10POS .1X.1 |
| XG2A-1001 | 功能描述:集管和线壳 Connector w/Standard Terminal 10 Contacts RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
| XG2A1002 | 制造商:Omron Electronic Components LLC 功能描述:CONN IDC CONN M 10 POS 2.54MM IDT RA CBL MNT - Bulk 制造商:Omron Electronic Components LLC 功能描述:CONN SOCKET IDC 10POS .1X.1 |
| XG2A-1002 | 功能描述:集管和线壳 Connector w/Reverse Terminal 10 Contacts RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
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