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160A zero flux broad frequency 300Hz high frequency electric sensor full frequency current transmitter output 4-20mA

Using precision constant current technique and linear temperature compensation technology, the process of non control variables (consumption) linear isolation is converted into standard variable DC signal output for DC3V3.3V4V5V10V4-20ma20ma PLC or DCS, DS or P, MCU, data acquisition card, MCU paperless recorder data acquisition system provides a standard current signal for data conversion of A/D pretreatment

price:USD$220.00
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160A zero flux broadband 300Hz high frequency electric current sensor frequency transmitter output 4-20mA closed-loop current sensor is also called Holzer, also known as compensation type sensor, the main loop measured current Ip through a secondary coil in magnetic core magnetic field generated by the current premises, the magnetic field generated by the in compensation, so that the device is in the detection of zero flux Holzer working condition. The specific work process of magnetic balanced current sensor: when a current through the main circuit, the magnetic field is produced in the wire ring to Holzer and poly aggregation induction device, output signal generated by the driver for the corresponding power tube and the conduction, thus obtaining a compensation current of Is. The current generates magnetic field through multi turn windings. The magnetic field is just opposite to the magnetic field generated by the measured current, thus compensating the original magnetic field and making the output of Holzer device decrease gradually. When the magnetic field produced by multiplying the Ip and the number of turns is equal, Is will no longer increase. At this time, the Holzer device indicates the role of zero flux, which can be balanced by Is at this time. Any change in the measured current will destroy this balance. Once the magnetic field is out of balance, the Holzer device has a signal output. Once the power is amplified, the corresponding current flows through the secondary winding to compensate for the unbalanced magnetic field. From the magnetic field to the rebalance, the time required is less than 1 mu s, which is a dynamic equilibrium process. B magnetic balance type current sensor called compensation sensor, namely the primary current Ip generated in the magnetic core premises through a secondary magnetic field coil current magnetic field generated by the compensation, the compensation current of Is accurately reflect the current of primary side Ip, so that the Holzer device is in the working state of zero flux detection. The working process is as follows: when the main circuit has a current passing through, the magnetic field generated on the wire is gathered by the magnetic ring and induced to the Holzer device. The output signal is used to drive the power tube and make it connect, so as to get a compensation current Is. The current generates magnetic field through multi turn windings. The magnetic field is just opposite to the magnetic field generated by the measured current, thus compensating the original magnetic field and making the output of Holzer device decrease gradually. When the magnetic field produced by multiplying the Ip and the number of turns is equal, Is will no longer increase. At this time, the Holzer device plays the role of indicating zero flux. At this time, Is can be used to test Ip. When the Ip changes, the balance is damaged, and the Holzer device has signal output, that is, repeating the above process to achieve the balance. Any change in the measured current will destroy this balance. Once the magnetic field is out of balance, the Holzer device has a signal output. Once the power is amplified, the corresponding current flows through the secondary winding to compensate for the unbalanced magnetic field. From the magnetic field to the rebalance, the time required is less than 1 mu s, which is a dynamic equilibrium process.
160A zero flux broad frequency 300Hz high frequency electric sensor full frequency current transmitter output 4-20mA advantage
1., the measurement range is wide: it can measure arbitrary waveforms of current and voltage, such as DC, AC, pulse, trigonometric waveform, etc., and can also faithfully reflect the transient peak current and voltage signals.
2. fast response: the fastest response time is only 1US.
3. the precision of measurement is high: its measurement accuracy is better than 1%, and this precision is suitable for any waveform measurement. The common transformer is a perceptual element. After access, it affects the waveform of the measured signal. The general precision is 3%~5%, and it is only suitable for the 50Hz sine wave.
4. good linearity: better than 0.2%
5. the dynamic performance is good: the response time is fast, it can be less than 1US, and the response time of the common transformer is 10~20ms.
6. the bandwidth of the work is wide: the signals in the range of 0~100KHz frequency can be measured.
7. reliability is high, the average working time without fault is long: the average time free time is >510 hours
8. overload capacity and wide range of measurement: 0--- tens of ampere to ten thousand amperes
9. small size, light weight, easy to install.
        
When the B Holzer current sensor is used, the following precautions should be followed:
1, in order to get better dynamic characteristics and sensitivity, we must pay attention to the coupling between the primary coil and the secondary coil. It must be coupled well. It is better to use a single conductor and the conductor completely fills the aperture of the Holzer sensor module.
2, when the DC current flowing through the primary coil of the sensor, and the secondary circuit is not connected to the power regulator or | side open circuit, the magnetic circuit is magnetized, and remanence affects the measurement accuracy (when used to first turn on the power and the measuring end M), when this happens to demagnetization processing. The method is that the secondary circuit does not add power, and the same level of AC current is passed in the original coils and the value is gradually reduced.
3, Holzer sensors have strong ability to resist external magnetic field interference. However, in order to get higher measurement accuracy, when there are strong magnetic field interference, we should take appropriate measures to solve them. The usual methods are:
Adjust the direction of the module to minimize the effect of the external magnetic field on the module.
Cover a metal shield with an anti magnetic field on the module.
4, the best accuracy of measurement is obtained at rated value. When the measured current is far below the rated value, we need to get the best accuracy and the original side can use multiple turns, but we need to pay attention to the spatial location of the wire.
The 5 current sensor must choose the products of different specifications according to the rated current value of the measured current. The long time excess of the measured current will damage the terminal power amplifier (the magnetic compensation). In general, the duration of the 2 times overload is not more than 1 minutes.
6, the voltage sensor must introduce a current limiting resistor R1 at the original side according to the product description, so that the primary side can get rated current. Under normal circumstances, the overvoltage duration of 2 times shall not exceed 1 minutes.
The best accuracy of 7 current voltage sensor is in the primary side of the rated value under the conditions, so when the measured current is higher than the rated current sensor, sensor should be chosen correspondingly large; when the measured voltage is higher than the rated value of the voltage sensor, should adjust the current limiting resistor. When the measured current is lower than the rated value is below 1/2, in order to get the best accuracy, can use multiple cycles of way.
8) the insulation and withstand voltage 3KV sensor can work normally in the 1KV and below AC system and 1.5KV and below DC system for a long time.
The use of unit 9 at the request of good dynamic characteristics when using a single copper busbar and the best aperture with big generation small or more cycles, will affect the dynamic characteristics.
10, when used in the Holzer sensor high current DC system, the main reason for the operation of the power supply is open or malfunction. The remanence affects the accuracy. The method of demagnetization is to communicate in the original side without working power, and gradually reduce its value.
The 11 sensor's ability to resist external magnetic field is a current of 2 times the original current value of the distance sensor 5 to 10cm, which is more than the original side current of the sensor, and the magnetic field interference can be resisted. The interphase distance should be more than 5 ~ 10cm when the three phase large current wiring is made. 160A zero flux broad frequency 300Hz high frequency electric sensor full frequency current transmitter output 4-20mA
12 in order to make the sensor work in the best measurement state, it is best to use the voltage regulator.
The saturation point and saturation point of the 13 sensor make it strong overload capacity, but overload capacity is limited by time. Overload capacity of over 2 times can not exceed 1 minutes when testing overload capacity.
The 14 primary current bus temperature should not exceed 85 C, which is determined by the characteristics of ABS engineering plastics. The user has special requirements and can be used as the shell of high temperature plastic. In addition to the installation of wiring, calibration and attention to the working environment of the sensor, the measurement accuracy can also be improved by the following methods: a.
 
Application of Holzer current sensor [/b]
In recent years, a large number of power transistors, rectifiers and thyristors are widely used in automation systems. AC variable frequency speed regulation and PWM circuits are widely used, making the circuit no longer just the traditional 50 week sine wave, but there are various waveforms. For such circuits, the traditional measurement method can not respond to the true waveform, and the current and voltage detection elements are also not suitable for the detection and detection of high and high di/dt current waveforms.
The Holzer effect sensor can measure the current and voltage of any waveform. The output terminal can truly reflect the waveform parameters of the current or voltage at the input end. Aiming at the shortcoming of large drift in temperature of Holzer effect sensor, the compensation circuit is used to control, which effectively reduces the influence of temperature on measurement accuracy, ensures the accuracy of measurement, and has the characteristics of high accuracy, convenient installation and low price.
Holzer effect sensor is widely used in frequency conversion speed regulation device, inverter device, UPS power supply, communication power supply, electric welding machine, electric locomotive, substation, numerical control machine tool, electrolytic plating, microcomputer monitoring, power grid monitoring and so on.
Power technology development today, has been the integration of the essence of electronic and power integration, automatic control, material, sensor, computer, electromagnetic compatibility, thermal and other technical fields, we have reason to believe that in twenty-first Century the power supply technology, the sensor will play a vital role, so the current sensor and Application the design and development of sensor, workers should pay enough attention to. Holzer's current sensor because of its multiple types and wide range (current 5~10000a; voltage 5~5000v), has the advantages of high precision, high sensitivity, good linearity, standardized, easy installation, strong anti-interference ability, reliable quality, MTBF MTBF long, in various fields, especially in the locomotive traction and industrial applications in the field of more worthy of the trust of users. 160A zero flux broad frequency 300Hz high frequency electric sensor full frequency current transmitter output 4-20mA
  

 

JLBA10I AC100A/DC4-20ma

 

 

work environment

ambient temperature

-25℃~+80

Storage temperature

-40℃~+115

relative humidity

90%

Pressure condition

Normal atmospheric pressure

Electrical parameters

Rated current range

AC100A

Error nonlinearity

0.1%

Output current

@Ip=Ipn   DC4-20ma

 

Measuring current range

AC150A

Overload multiplier

Infinite

working frequency

0-100khz

Working power supply

±15V±30%V

Power waste

35ma

Insulation impedance

 

Dielectric Strength

2500V50hz1Min)

Misaligned current temperature drift

@-40-85≦±0.2ua/℃

Output current temperature drift

@-40-85≦±0.02ua/℃

Zero point current

4±0.1ma

Linearity

@Ipo=0±Ipn≦0.2%FS

response time

250ms

bandwidth

0-3Db DC-100khz

Mechanicsparameter

First wear core

Diameter of inner hole22mm

Shape size

106*60*24mm

Two terminal

508Terminal connection

Life

greater than10Ten thousand hours

Shell

PBTFlame retardant material

Potting

EpoxyEpoxy resin adhesive

weight

160g

tolerance

±0.3mm

Offset current

@Ipo ≦±0.1ma

Magnetic misalignment current

@Ipo=±Ipn-0   ≦±0.1ma