Single-phase current transmitter is a kind of power test substation developed for the power measurement of single-phase AC in motor test on the basis of motor test and test technology research, in accordance with IEC and relevant national specifications for motor test. The advanced filtering technology and reasonable software algorithm are used to deal with the problems of low measurement accuracy and unstable measurement data of general appearance. The single-phase current power transmitter has low power consumption, high precision, light weight, and selects personalized planning, digitizes the front-end of measurement, the output signal is digital, and the serial optical fiber bus method is used for transmission, and is centrally managed by the distributed measurement and control master station, which has excellent voltage blocking ability and electromagnetic compatibility, and strong anti-interference. It is suitable for front-end power acquisition of distributed measurement and control test system.
Single-phase current transducers are characterized by:
1. High accuracy (typical: 0.2% zui is good and 0.05%);
2. The whole range scale has a very high linearity;
3. High degree of integration, simple structure, excellent temperature characteristics and long-term operation stability, so that the transmitter is exempt from timing calibration.
The single-phase current transmitter converts the measured signal into a voltage, which is directly converted into a voltage that has an excellent linear relationship with the measured signal and is completely blocked by the HCNR200/201 linear optocoupler, and then passes through the constant voltage (flow) to the output. It has the advantages of simple principle, refined line planning, high reliability and convenient equipment.
The single-phase current transmitter can directly convert the AC current in the main circuit under test into a constant current loop specification signal of DC 4-20mA (converted into DC 1-5V through 250Ω resistance or DC 2-10V through 500Ω resistance) output in linear shares, and successively transmitted to the receiving equipment (computer or display appearance).
The primary and secondary sides of the single-phase current transmitter are highly insulated, and there are two-wire and three-wire output wiring methods. The three-wire transmitter has a positive end, a negative end and a signal output end of +24V auxiliary operation power supply;
The single-phase current transmitter has the characteristics of high precision, small size, low power consumption, wide frequency response, and anti-interference. The two-wire port has strong anti-induction lightning ability, and has the advantages of lightning wave and surge protection ability. It is especially suitable for the intelligent monitoring system of load current of generators, motors, intelligent low-voltage distribution cabinets, air conditioners, fans, street lights, etc.
The single-phase current converter has ultra-low power consumption, 0.096W when a single static unit, 0.48W at full scale, and 0.6W with an internal limit of output current.
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