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| 型号： | 2938840 |
| 厂商： | Phoenix Contact |
| 文件页数： | 63/106页 |
| 文件大小： | 0K |
| 描述： | POWER SUPPLY 1A 24VDC |
| 其它有关文件： | Power Supply Warranty Extension |
| 产品目录绘图： | 2938840 |
| 标准包装： | 1 |
| 系列： | 迷你型 |
| 类型： | 标准产品 |
| 输出数： | 1 |
| 输出电压： | 24V |
| 输入电压： | 100 ~ 240 VAC |
| 输出 - 1 @ 电流（最大）： | 24 VDC @ 1A |
| 功率（瓦特）： | 24W |
| 电源类型： | 开关（封闭框架） |
| 应用： | 商用 |
| 安装类型： | DIN 轨道 |
| 尺寸/尺寸： | 4.51" L x 0.89" W x 3.90" H（114.5mm x 22.5mm x 99.0mm） |
| 工作温度： | -25°C ~ 70°C |
| 效率： | 80% |
| 电源（瓦特）- 最大： | 24W |
| 批准： | cUL，UL |
| 其它名称： | 277-1668 MINI-PS-100-240AC/24DC/1 |
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Useful Information from Everyday Practice
Unregulated
Linearly regulated
Primary-switched mode
Unregulated power supply units provide the highest short-circuit current. The maximum
short-circuit current of these devices is only limited by the fuse at the device output and can
typically be ten times the nominal output current for a short period.
With linearly regulated devices, the short-circuit current is limited by the output fuse and
the controller temperature and can be two to three times the nominal current for a short
period.
Many of the primary-switched mode power supply units available operate according to the
fold-back characteristic curve. In order to avoid high component temperatures they switch
off in the event of an overload or a load short circuit and attempt to start again after a short
time. The short circuit current is about 1.1 times the nominal current I nom . The power supply
unit continues to operate normally as soon as the overload or short circuit have been
removed (see section 3.15, "Output Characteristic Curves of Power Supply Units").
In order to guarantee system selectivity at any time the blowing of the fuses used must
occur earlier than the switching off of the power supply unit. If not, the erroneous path is
not enabled and the short circuit will remain. The power supply unit permanently tries to
carry out an unsuccessful warm start and changes to clock operation.
As a result, the supply of all the loads connected in the system will be interrupted. The
faulty load can only hardly be localized because no fuse has blown. This leads to long
downtimes and unnecessary costs.
Fuse blowing depends on the I 2 t value (pre-arcing) of the fuse. The higher the short-circuit
current the more reliable the fuse blowing. Reliable solutions can thus be implemented
using power supply units, which do not switch off in the event of an overload or a load short
circuit but permanently supply output current. These power supply units operate according
to the U/I characteristic.
When selecting miniature circuit breakers, modules with low internal resistance must be
used. Using thermomagnetic circuit breakers (TMC), which have a low internal resistance,
is recommended. Cable cross sections should also be chosen large enough. It must be
noted that cable resistance increases with reduced cable cross section. Too high cable
resistance causes too high cable losses. According to Ohm's law, the maximum current is
therefore not able to flow. However, the maximum current is required for reliable fuse
blowing.
All QUINT POWER and MINI POWER power supply units from Phoenix Contact are being
provided with a U/I-controlled characteristic.
5598_en_03
PHOENIX CONTACT
3-29
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 2938853 | 功能描述:DIN导轨式电源 QUINT 24VOLT 5AMP RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W |
| 2938860-2 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 2938866 | 功能描述:DIN导轨式电源 QUINT100-240AC/24DC 24VDC 10A RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W |
| 2938879 | 功能描述:DIN导轨式电源 QUINT 24VOLT 40AMP RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W |
| 2938905 | 制造商:Phoenix Contact 功能描述:Primary Switched-Mode Power Supply |
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