Knows the capacity, resistance, capacitive reactance and torque of electrical equipment - News - Global IC Trade Starts Here Free

Single chip microcomputer STM32L151CCU6

SMD aluminum electrolytic capacitor

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Tantalum capacitor

1. Know the nature and installed capacity of the plant, and calculate its plant-wide variable capacity

The factory is equipped with a variable kilovolt-amperes and an estimated kilowatt-hour. Metallurgical textile cement plant, kilowatts is kVA. Mechanical manufacturing processing plant, half kilowatts of kilowatts.

The rest of the light industrial chemical plant, kilowatts and seven thousand kilovolts.

2. Know the nominal capacity of the shunt capacitor, calculate its capacitance

Compensation for shunt capacitors, the relationship between thousands of micro-methods: thousands of divisions divided by square pressure, three points and two times commercial micro method.

Commonly used shunt capacitors, thousands of micro-interval calculations. The rated voltage is two hundred and three, and sixty micro-methods are lacking. The rated voltage is 400 volts, and the twenty micro method is a thousand.

The rated voltage is 6.3 thousand, and the eight micro-methods are lacking. The rated point is tens of five, and the three micro-methods are lacking.

3. Know the distribution transformer capacity, calculate the maximum capacity allowed to directly start the motor

Three-phase asynchronous motor, full-voltage start-up kilowatts: distribution capacity kVA, multiplied by five times nine.

4. Know the current transformer capacity, calculate its secondary rated impedance

Common current transformers, rated load impedance: secondary rated one amp, impedance capacity volt-amperes. Secondary rated five amps, capacity multiplied by four divided by one hundred.

5. It is known that the 380V single-phase AC welding machine is connected to the transformer capacity, and the cross-sectional area of ​​the power supply cable, the melt and the load switching capacity are calculated.

Three hundred and eight electric welding machine, two core wire of power supply cable, capacity of 80% aluminum cross section, capacity half copper section. Three times the capacity of the fuse, the load switch fuse.

6. Know the incandescent light bulb capacity, calculate its thermal resistance

For the bulb thermal resistance, the wattage removes the square of the pressure.

Commonly used bulb thermal resistance, wattage removal factor: bulb voltage two hundred two, wattage removed forty-eight. One hundred and twenty-seven volts, the wattage was removed by one thousand six.

The lamp voltage is one hundred and one watt, and the wattage is removed by one thousand two. The lamp voltage is thirty-six, and the wattage is removed by one thousand three.

7. It is known to access the capacitor capacity in the power frequency AC circuit, and calculate its capacitive reactance.

Power frequency capacitor capacitive reactance, micro-method removal of three thousand two.

8. Know the load resistance in the power frequency rectifier circuit, calculate the capacitance of the capacitor filter

In the power frequency rectification circuit, the capacitance filter capacitor: the load resistance is fifty, and the quotient is one thousand.

9. Know the motor capacity and the number of magnetic poles, calculate the rated torque

Motor rated torque, ten times the number of magnetic poles, the product of three numbers divided by six, the unit uses Newton meters.