各位老大,小弟在做温升测试时有一疑问,请各位帮忙,疑问如下:
器具的Rated label上标明的电压和功率是220~240V 2200W,那么温升测试时的输入功率是怎样计算的呢?
是240V相对应的实际功率*1.15倍呢,还是(240/230)的平方乘以1.15倍,然后再乘以2200W呢?
先谢过了!
温升测试疑问
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@simonjiang
所以说,是240V相对应的实际功率*1.15倍呢,还是(240/230)得出的系数的平方乘以1.15倍,然后再乘以2200W呢?你的意思是2200*1.15吗?还是怎样?我所做的是暖风机,是联合型器具,带有PTC的.另外,你说的“输入条件为在输入额定电压上下限的正负10%”,这在标准的哪一条款呢?谢谢!
GB4706.1 第5.13 带PTC电热元件的器具,在与规定的输入功率相对应的电压下进行试验,当规定的输入功率大于额定输入功率时,用来乘电压的系数等于用来乘功率系数的平方根,即:实验电压为240V×√1.15
不知道我的说法对不对,还请教大家!这些都是在第5章里的!
不知道我的说法对不对,还请教大家!这些都是在第5章里的!
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5.12 For heating appliances and combined appliances, when it is specified that the
appliance has to operate at a power input multiplied by a factor, this applies only to heating
elements without appreciable positive temperature coefficient of resistance.
For heating elements with appreciable positive temperature coefficient of resistance, other
than PTC heating elements, the supply voltage is determined by supplying the appliance at
rated voltage until the heating element reaches its operating temperature. The supply voltage
is then rapidly increased to the value necessary to give the power input required for the
relevant test, this value of the supply voltage being maintained throughout the test.
NOTE In general, the temperature coefficient is considered to be appreciable if, at rated voltage, the power input
of the appliance in cold condition differs by more than 25 % from the power input at operating temperature.
5.13 The tests for appliances with PTC heating elements are carried out at a voltage
corresponding to the specified power input. When a power input greater than the rated power
input is specified, the factor for multiplying the voltage is equal to the square root of the
factor for multiplying the power input.
11.4 Heating appliances are operated under normal operation and at 1,15 times rated
power input.
appliance has to operate at a power input multiplied by a factor, this applies only to heating
elements without appreciable positive temperature coefficient of resistance.
For heating elements with appreciable positive temperature coefficient of resistance, other
than PTC heating elements, the supply voltage is determined by supplying the appliance at
rated voltage until the heating element reaches its operating temperature. The supply voltage
is then rapidly increased to the value necessary to give the power input required for the
relevant test, this value of the supply voltage being maintained throughout the test.
NOTE In general, the temperature coefficient is considered to be appreciable if, at rated voltage, the power input
of the appliance in cold condition differs by more than 25 % from the power input at operating temperature.
5.13 The tests for appliances with PTC heating elements are carried out at a voltage
corresponding to the specified power input. When a power input greater than the rated power
input is specified, the factor for multiplying the voltage is equal to the square root of the
factor for multiplying the power input.
11.4 Heating appliances are operated under normal operation and at 1,15 times rated
power input.
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