参数资料
型号: 2938840
厂商: Phoenix Contact
文件页数: 83/106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
Useful Information from Everyday Practice
Displacement power
The reactive power that is occurring most often in the field of electrical power engineering
is called displacement power. It is generated in AC circuits with linear capacitive and
inductive loads.
With ohmic loads the current consumption is in phase with the sinusoidal voltage. In the
load, the consumed apparent power S is completely converted to real power P. Reactive
power Q is not generated and the value of the power factor λ is 1.
With capacitive or inductive loads, the current consumption also has a sinusoidal shape
but is not in phase with the voltage (see Figure 3-35). In this example, the current lags
behind the voltage. In general, the voltage lags behind the current when using capacitive
loads and vice versa when using inductive loads.
The time shift between current and voltage is called phase displacement. The size of this
displacement is measured by means of the phase displacement angle ? .
u (t)
t
i (t)
t
?
5598D314
Figure 3-35
Phase displacement ?
The real power P actually transformed in the load in the event of a phase displacement ?
between current and voltage is the product of the effective values of current, voltage and
cosine of the displacement angle ? . The unit of the real power P is W (Watt):
P = ? · ? · cos ? [8]
[P] = W
Because of the phase displacement the consumed apparent power S is not completely
converted to real power P in the load. As a result, reactive power Q is generated.
If the reactive power Q is only generated by the phase displacement the power factor λ
corresponds to the cosine of the displacement angle ? (according to formulas [7] and [8]).
λ =
P
S
=
? ? cos ?
? ?
= cos ?
Therefore, the terms power factor and cos ? are often used as synonyms.
5598_en_03
PHOENIX CONTACT
3-49
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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
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