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FAQ

Why is double speed motor low speed r current and high speed current?
1) the supply voltage is the same, when the output power is certain, the current of the low speed motor must be large;2) the supply voltage is the same, the output torque must be certain, the high speed of the motor is certainly high;
How to use the caliper and its working principle?
A part of the measuring ammeter million is determined by the current transformer and current measuring part composed of 000 table. The iron core of the mutual inductor is provided with a movable part and is connected with the handle. When the utility model is used, the movable iron core is opened by pressing the handle. The wires of the current to be measured are put into the jaw and the handle is closed to close the iron core. At this point, the current through the wire is equivalent to the transformer primary winding, the two winding will appear induction current, the size of the wire by the working current and winding coil ratio is determined. The ammeter is connected to both ends of the two winding, so that the current indicated by it is the current in the two winding, which is proportional to the current in the work. So will be good as the amount of current reflect a scale on the side of the wire when a current is passed, and the two winding connected to the ammeter pointer is in proportion to deflect, thus indicating the value of measured current.
How to measure a zero line with a universal watch?
Right hand with the red pen were measured in the zero line or line, you write down the results of the 2 measurements, the small FireWire, zero line.
Try to explain in detail by combining pictures and words, thank you
1, in the use of clamp ammeters should carefully read the instructions, it is AC or AC / DC clamp meter.2, the measured voltage clamp meter shall not exceed the values marked on the ground, otherwise easy to cause the accident, or cause the risk of electric shock.
What is the current clamp? What are the main points on ammeter selection?
Simple operation, do not need to test large current circuit can be directly connected. Safety clamp meter, multimeter and insulation resistance meter are analogue and digital two. The detection range of the standard type: AC, DC from 2A to 200A or 400A, also can be detected by 2000A high current products leakage detection; micro current detection and product number mA and the detection of transformer power supply
What is the role of clamp meter?
A table can shift through the switch, the scale change. But the switch is not allowed to operate when charged. Clamp meter general accuracy is not high, usually 2.5 ~ 5. In order to facilitate the use of the table there are different ranges of switching switches for measuring different levels of current and voltage measurement function.The first is through the clamp meter is used to measure the AC current, but now the multimeter has some functions of it, can measure AC and DC voltage, current, capacitance, diode, transistor, resistor, temperature, frequency and so on.A table is for an electrical line measurement of the running current meter can measure the current in the energized condition. It is an electrical instrument specially designed for measuring AC current.
Can the 5 (20) A meter withstand the current of 30A?
Power = voltage multiplied by the current.Current voltage = power divided byThe voltage you use is 220VDivided by 220 by 8000= is the current of this powerIf it is a mechanical meter, there is no problem, if it is an electronic plug-in meter, it can not
Clamp meter cable direction? Why do I change the direction of measurement with a cable, the current is not the same
Clamp type ammeter, clamp wire, current measurement method can only measure alternating current, the battery should be charged dc.