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0-75mV 0-1000V RS485 / 4G / Output Transducer AC Voltage Current Transmitter Sensor voltage to current transmitter 0-24v
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US$ 22.5
≥50 Pieces
US$ 18
≥100 Pieces
US$ 15
≥1000 Pieces
Quick Details
Place of Origin:
Fujian, China
Brand Name:
KH
Model Number:
KTC8
input:
0-2000A
Product Details
Products Description
MIC-KTA-DC Series DC voltage transmitter
is a measurement module which converts the measured current into DC voltage (or DC current) signal proportional to the primary current by using the principle of electromagnetic induction (mutual inductance). It is highly insulated between the primary side and secondary side. This product adopts STM technology and digital integrated circuit technology, it has high integration, small volume, easy installation, high error accuracy, good linearity, no adjustable potentiometer, and can work stably for a long time and adapt to various working environments. It is widely used in the system control and detection of electrical equipment in electric power, petroleum, coal mine, chemical industry, railway, communication, building automation and other industries.
- Technical feature
Schematic diagram of DC current transmitter
2.1 Use high precision Measurement Chip for Voltage, Compared with the current mainstream products (all of them are analog and electrical technology), our current measurement chip has the following advantages:
2.1.1 Adopt 24Bit high precisionΣ- △ ADC technology, the RMS error of voltage is less than 0.1% in the dynamic range of 1000:1
2.1.2 The measurement error is adjusted by software without potentiometer, and the measurement accuracy is stable and unbiased for a long time. At present, all products in the industry use potentiometers to adjust measurement errors, which have large errors, poor factory consistency and short service life. Especially in vibration or high-frequency electromagnetic environment, potentiometers are prone to offset or fail, and ultimately lead to transmitter failure.
2.1.3 Built-in 1.25V (+/-1%) reference voltage. Typical temperature coefficient is 5 ppm / ℃ and maximum is 15 ppm / ℃ . The transmitter still has super high precision in the whole temperature range. (At present, the products in the industry basically adopt analog-to-electric operational amplifier technology, whose temperature coefficient is over 100 ppm / ℃ , The linearity of measurement in the whole temperature range is poor, and the accuracy is not high.)
2.2 Use the16-bit MCU computer control chip which is RENESAS brand has the following advantages compared with the current mainstream products in the industry (all without MCU):
2.2.1 The measurement results are digitized, noise interference is reduced and the anti-interference ability of the product is strong.
2.2.2 The factory parameters of the products are configurated by software. The products have no short contacts and potentiometers. Reliable products and long service life.
2.2.3 It has the output function of the pulse indicator which is proportional to the measured voltage value. It is red and goes out normally. It flickers when measuring the current value. It is convenient to install and debug on site.
2.2.4 It has the indicator lamp of working state of transmitter, green when working. Bright when no voltage is measured. Extinguish when there is voltage.
2.2.5 With RS485 communication interface (optional), the measured voltage can be read.
2.2.6 With alarm output function of voltage exceeding upper limit or lower limit (optional).
2.3 The voltage loop output chip of TI has the following advantages compared with the current mainstream products in the industry (discrete circuits):
2.3.1 Nonlinear error: 0.002% ；
2.3.2 Low temperature drift: 1µV/ ℃ ；
2.3.3 Accuracy: 0.015%
2.3.3 Wide operating voltage range: 7-36V
2.4 SMT Welding Technology
2.5 Adopt well-known brand components. The products are designed according to industrial grade standard.
2.6 Multiple circuit protection function ensures the reliable operation of the transmitter in various environments.
2.6.1 Operating Power Reverse connect protection
2.6.2 Output Overcurrent Limit Protection
2.6.3 RS485 Anomaly Access Protection
2.6.4 Transient Induced Thunder and Surge Current TVS Suppression Protection at Current/Voltage Output Port
2.6.5 Built-in voltage filter circuit, lower requirement for input power ripple
3. Type Selection Information
- Electrical parameters
|
Ib |
Rated current value (Arms) |
10 20 50 100 220 380 450 500 |
|
I max |
Maximum current value (Arms) |
120% * Ib |
|
Ioc |
Overload capacity |
200% * Ib |
|
V sn (Corresponding to voltage output type) |
Output voltage (Vdc) |
DC0-5V, DC0-10V etc |
|
Isn (Corresponding to current output type) |
Output current(mAdc) |
DC4-20mA,DC0-20mA etc |
|
X |
Accuracy （ Ta =+25℃ ） |
0.5% |
|
E L |
Linearity error |
0.2% |
|
Vc |
Supply voltage |
DC8-30V |
|
Tr |
Reaction time |
≤ 300mS |
|
f |
Frequency range |
40-200HZ |
|
Ic |
Consume power |
≤ 0.8W |
|
R L |
Load resistance |
≥ 5kΩ(voltage output type) |
|
≤ 500Ω(current output type) |
||
|
Ioutmax |
Maximum output current |
Typ ≤ 25 mA |
|
Vd |
Power frequency withstand voltage (50HZ,1min) |
4KV |
|
Ri |
Insulation resistance |
More than 20MΩ@DC500V |
|
imp/mAh |
Voltage Pulse Constant Output |
20imp/mAh(Unique Innovative Function) |
5. Regular parameters:
|
Ta |
Working temperature |
-40 - +80 ℃ (Superior to other manufacturers10 - +70 ℃) |
|
Ts |
Storage temperature |
-55 - +85 ℃ |
|
W |
Weight |
Appr. 250g |
|
St |
Executive standard |
GB/T13850-1998/IEC688 ： 1992 |
|
Hw |
Working humidity |
20-90% No condensation |
6. Structure drawing
7. Output curve
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