Shandong import hall current temperature sensor satisfying choice

Current temperature sensor in the use of the superiority

the traditional current voltage transformer, although more working current voltage grade, under the provisions of sine working frequency is of high accuracy, but it can be suitable for very narrow frequency band, and cannot be passed. In addition, the work is exciting current, so this is inductive devices, to make it on the response time can only achieve tens of milliseconds. Once known as current transformer secondary side open circuit will produce high hazard. In the use of microcomputer testing of multi-channel data acquisition, people are seeking to isolate and acquisition signals. Current voltage temperature sensor inherited the advantages of the former vice edge and reliable insulation transformer, and solves the transfer price of temperature sensor, bulky and with defects of transformer, offers microcomputer testing automation management system such as the analog-to-digital conversion. In use, the temperature sensor output signal can be input directly to the high impedance analog header or digital panel table, can also be used by the secondary processing, analog signals for automation devices, digital signal to the computer interface.

in the 3 kv high-voltage system, current, voltage, temperature sensors can cooperate with the traditional high voltage transformer, the replacement of traditional charge temperature sensor, provide convenience for analog-to-digital conversion.

current temperature sensor main characteristic parameters of the

1, the standard rating ISN IPN and rated output current.

IPN refers to the current temperature sensor can test the standard rating, expressed in RMS ( 武器) Product model, the size of IPN and the temperature sensor, ISN refers to the current temperature sensor rated output current, generally is 10 ~ 400 ma, of course, according to certain models may be different.

2, the offset current ISO.

offset current is also called the residual current and residual current, it is mainly by the components or electronic operational amplifier working state of the temperature sensor circuit of current instability, caused by the current temperature sensor in the production, at 25 ℃, IP = 0, the offset current is modulated to smaller, but the temperature sensor production line when you leave, will produce certain size of the offset current.

3, linearity.

linearity determines the temperature sensor output signal, Vice side current IS) With the input signal, Primary side current IP) Within the measuring range is proportional to the degree.

4, temperature drift.

offset current ISO is calculated in 25 ℃, when electrode surrounding environment temperature change, ISO can produce change, therefore, consider the large variation of the offset current ISO is very important, among them, the IOT is refers to the temperature drift in the current temperature sensor performance table values.

current temperature sensor characteristic parameters on the motor protection

1, the temperature sensor voltage VA.

the VA means the power supply voltage, pay attention to the power supply voltage should not exceed the prescribed values, if more than a specified value can lead to equipment detection performance is low, or equipment can't normal operation.

2, the standard rating ISN IPN and rated output current.

in general current IPN value of the temperature sensor is the detection rating, different models is different, ISN refers to the rated output current, output current usually between 100 ~ 400 m current temperature sensor A, when trying to choose need to choose according to need.

3, overload.

the overload ability of the actual current temperature sensor, when more than current overload condition, the original and current will increase, while the overload of the actual value, but will not affect to equipment.

4, Ipmax measuring range.

Ipmax means to measure the current value, this value is usually higher than that of IPN, users need to pay attention to when choosing a current temperature sensor belongs to the single-phase power supply, power supply voltage it is 2 times of bipolar power supply voltage.

5, precision.

the precision of the equipment, is also considering a big general accuracy directly and standard rated current is related.