Everyone of three-phase power filters should be familiar. What types and series do you know about three-phase power filters? This article will reveal relevant knowledge about the classification of three-phase power filters for you in the future.
Power filterThe power filter is a passive two-way network, one end of which is the power source, and the other end is the load. The principle of the power filter is one kind-impedance adaptation network: the greater the impedance adaptation between the input and output sides of the power filter and the power and load sides, the more effective the attenuation of electromagnetic interference.
Power filter internal circuit
Power filter model classificationThe function of the power filter is to reduce power interference, and power interference can be divided into two categories: normal mode and common mode. Normal mode is the noise between two sets of input power lines. This noise is usually generated when shutting down and starting up. The common mode refers to the interference caused by poor grounding of equipment, or radio and refrigerator motor electromagnetic, fluorescent energy-saving lamp ballast, washing machine, fan thyristor speed control, etc.
1: The resistance wire can be short-circuited within a small range (generally no more than a few centimeters). The short-circuit measured by the meter is only the cold resistance of the resistance wire. The resistance value is very small. It needs to be measured with the 200 ohm range of the multimeter.
2: The resistance wire is used on the AC 220V voltage, and the positive and negative half-cycle voltages work together.
3: The low-temperature diode is used to divide the voltage and reduce the power. It belongs to half-wave rectification, and the power is reduced by half. The most common application is electric mattresses, which are also included, and the solution is the same
4: If you are not sure whether the circuit is normal or not, it is recommended not to directly connect the power to the test. You can connect a 5A or 10A fuse in series first, so that in case something goes wrong and there will be no danger.
Three-phase power filter classificationThe product characteristics of the three-phase power filter include rated current, input and output types (250 quick-connect terminals, threaded bolts, junction boxes, bus bars and bolt applications), wiring configuration (3 wires + ground and 4 wires + ground), voltage (Maximum) and typical applications. Take Tyco's CORCOM three-phase power filter as an example. The EMI power filter with a rated current of 3 to 1600 amperes is suitable for controlling EMI interference or susceptibility in various applications. It can be used for Delta or WYE wiring and has a variety of terminal connection options.
Corcom three-phase power filters are used for susceptibility control and comply with radiation standards. The specific products include the following series. You can select according to your needs:
ADT series
63 to 200 A high-performance, high-current three-phase Delta RFI filter
APH series
250 to 1,600 A high performance three-phase Delta EMI filter suitable for high current applications such as alternative energy sources and motor drives
APS series
250 to 1,600 A standard performance three-phase Delta EMI filter for high current applications such as alternative energy sources and motor drives
AYA series
16 to 100 amp three-phase WYE RFI power line filter
AYC series
16 to 200 A Three-phase WYE RFI power line filter for high-noise applications
AYO series
3 to 20 A compact low-current three-phase WYE RFI line filter
AYP series
20 to 60 A single-stage A series high-performance, high-current three-phase RFI filter for WYE applications
AYT series
20 to 60 A Two-stage A series high-performance, high-current three-phase RFI filter for WYE applications
BCF series
7 to 180 A Compact three-phase Delta RFI filter for general applications
FCD series
6 to 230 A Three-phase Delta external filter for frequency converters
Three-phase power filter series
EMI filters are very common in highly standardized production applications. The first step in EMI filter selection is to understand the role, application and product characteristics of the filter. I hope this article will give you a deeper understanding of the classification of three-phase power filters.
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