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FAQ

Use clamp ammeters, wire requirements will be placed in the window center. Why is this?

In the use of clamp ammeters before should carefully read the manual to find out AC or AC / DC clamp meter.

How to use the correct measuring clamp current meter

1, in the high pressure loop measurement, prohibit the use of lead from the clamp ammeters another meter measurement. When measuring the phase current of high voltage cable, the distance between the cable head and line should be above 300mm, and the insulation is good, which can be carried out when the measurement is convenient. 2, the observation time, we must pay special attention to keep a safe distance from the head and charged part of the human body and any part of the charged body distance shall not be less than the entire length of the clamp meter. 3. When measuring low voltage fusible fuse or horizontally arranged low voltage bus current, each phase shall be protected or insulated by insulation materials, so as to avoid interphase short circuit4, the use of high voltage clamp current meter should be paid attention to when the voltage clamp current meter, prohibit the use of low voltage electric current clamp meter high voltage measurement circuit. With high voltage clamp meter measurement, by the two person operation, non duty measurement should fill in second working ticket, should wear gloves when measuring stand on the insulating mat, must not touch the other equipment, to prevent a short circuit or grounding.5, after the end of the clamp current meter to measure the switch to the maximum file, so that next time use careless flow; and should be kept in a dry room6, when the cable has a ground, it is strictly prohibited to measure. To prevent the breakdown of the ground due to the low insulation level of the cable head, and endanger personal safety.7, clamp meter measurement, near the wire current, also have influence on it, so must pay attention to the position of the wire to the equal phase.8, maintenance should not live operation, in case of electric shock.

How to measure low voltage line grounding with pliers

Low voltage power supply has single-phase (two lines), three-phase (three lines), three-phase four wire three kinds of situations.

The power consumption of the same load, different power motors?

The key lies in the size of the load, according to the current data you provide, basically can determine whether the motor is loaded; if the motor using 37kW, because the load torque constant, the motor for rated torque, it is necessary to reduce speed, increasing the current, the current may be not reached before 70A would have burned the motor.

What is the current clamp? What are the main points on ammeter selection?

The true effective value of non sine wave switching power supply outside of a sine wave (True RMS). The products were selected: 1: point clamp meter object detection based on the detection of object, different alternating current, direct current, or to choose the type of leakage current; maximum conductor size 2: can be detected with the detection sites, testing whether it is necessary to use the average value of the circuit on ammeter circuit and transformer can not correctly detect the motor and other non sine wave from 21mm to 53mm in diameter diameter of different kinds of.3: value. The true effect detection circuit should use the true RMS clamp ammeters.4: other functions can not only detect the current, as well as detection and recording output in one of the models.

Air conditioning suddenly does not cool down, what's the matter?

Three of the reasons for the non refrigeration of air conditioning: the power of the air conditioner is not enough to prevent refrigeration: the amount of refrigeration required by the power space of the air conditioner is matched.

Electric drills, electric saws and so on. Under what circumstances should carbon brushes be used?

Brush (Carbon brush) also known as brush, a sliding contact, is widely used in many electrical equipment. Carbon brushes are mainly used in products such as graphite, impregnated graphite, and metal (including copper, silver) graphite. The carbon brush is the energy transfer device or signal between motor or generator or other rotating machinery of the fixed part and the rotating part, it is generally made of pure carbon coagulant, the general shape is square, stuck in the metal bracket, which has spring pressed it on the shaft, when the rotation of the motor, the power through the change which is delivered to the coil, as its main components are carbon, known as carbon brush, it is easy to wear. Regular replacement, cleaning and carbon deposition shall be maintained.

How do I add refrigerant to the wall mounted air conditioner?

You can not add it yourself, usually outside the repair workers, plus, and to the pressure gauge, clamp type table, capillary. General 1. 5 to 2 Pijia fluoride price of one hundred to one hundred and fifty range