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FAQ

What are the commonly used tools for electrician maintenance?

Kit; high voltage electroscope, low voltage test pencil; nose pliers, diagonal pliers, pliers, stripping pliers, small crimping pliers; 6 inch, 8 inch, 12 inch wrench, six angle wrench, a 8-19 wrench set, 8-19 wrench set, 32 sets of a screw sleeve; a large, medium and small trumpet cross screwdriver, screwdriver set a special instrument (now a lot of terminals to be used);

How to measure a zero line with a universal watch?

Range from 200mV~750V, the general 200V file, some clamp type table no 200V file can choose a bigger range, the pointer multimeter stalls to dots can choose 10 V ~100V 3, and then the probes were inserted in V /COM (Jack 220V voltage measuring everyday appliances)

A fire was found with a ground electricity? Stealing electricity.

To do so is very dangerous, prone to accidents, in case the public grounding wire grounding resistance is large, it will cause the water running electricity, indirectly causing electrocution, death accident, that would be troublesome

Electric car charger measuring current, when the battery is completely without electricity measurement, or in full of electricity measurement, how to know the charger accurate output current, with caliper meter measure?

The output current index given by the charger is the maximum current that the charger can output. If this indicator is exceeded, the output voltage drops, the charging is abnormal, or even the charger is damaged.

How to maintain and maintain the communication and power room?

The quality standard of power supply should be uninterrupted to the communication equipment. First of all, the quality of power supply should be guaranteed to meet the standard. In the regulation of telecommunication power supply maintenance China Telecom "(hereinafter referred to as the" Regulations "), the DC power supply voltage, DC power supply circuit connector (outside the joint pressure drop distribution screen, DC) the parameters of voltage, power supply standard AC mains power and AC power supply in the oil machine noise voltage, frequency and power factor so do the detailed requirements. At the same time, the regulations also specify the parameters such as three-phase supply voltage unbalance, voltage waveform, sine distortion rate and so on. From the above standard requirements, we can see that in the test of daily power supply quality

Is there a caliper meter that can measure direct current?

Magnetic balance type current sensor called compensation sensor, namely the primary current Ip generated in the magnetic core premises through a secondary magnetic field coil current magnetic field generated by the compensation, the compensation current of Is accurately reflect the current of primary side Ip, so that the Holzer device is in the working state of zero magnetic flux detection.

If there is no measurement capacitor on the table, then how to measure the quality of the capacitor?

The clamp type meter usually has current gear, and the current can be used to measure the charging current of the capacitorAfter using a dry cell to connect the circuit and turn on the battery, the current on the caliper table should show a relatively large current. Then the current drops rapidly and turns to 0. at last. This indicates that the capacitor is in good condition

Which is the best way to export lj2085 and lj2025 fishing gear?

The measured current is calculated for the fishing power, but the measurement of the maximum input current, to load a certain amount of fishing with, can bring high power light bulbs, or on the site with the sun, back type fishing device (such as SUSAN-735MP) with 500W solar lamp, solar lamp is two LJ-2025NP 1000W.