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

GW MB10F 0.8A 1000V rectifier bridge

Photocoupler

Capacitive load: Compared with the power supply, the load current leads the load voltage by a phase difference, and the load is a capacitive load (such as a compensated capacitive load).
A capacitor-like load in the circuit allows the current lead voltage to reduce the circuit power factor.
The load with the capacitance parameter of the load, that is, the load that meets the characteristics of the voltage hysteresis current is generally made into a capacitive load. When charging and discharging, the voltage cannot be abruptly changed. Its corresponding power factor is a negative value. The power factor of the corresponding inductive load is a positive value.
In the high frequency field, it refers to a load with a negative imaginary part of the load.
A capacitor-like load in the circuit allows the load current to advance the load voltage by a phase difference (compared to the power supply), reducing the circuit power factor.
The load with the capacitance parameter of the load, that is, the load that meets the characteristics of the voltage hysteresis current is generally made into a capacitive load. When charging and discharging, the voltage cannot be abruptly changed.
Its corresponding power is negative. The power factor of the corresponding inductive load is a positive value.
For general power control products, the given load, if not stated, is the apparent power; that is, the total capacity power; it includes both active power and reactive power;
The general inductive load description is often given the amount of active power, such as fluorescent lamps, fluorescent lamps labeled 15 to 40 watts, ballast power consumption is about 8 watts, the actual use of timers, the sensor switch is controlling it When you add this 8 watts;
The specific inductive part of the product, ie the magnitude of the reactive power, can be calculated from its given power factor.
In the hybrid circuit, the capacitive reactance is more sensitive, and the circuit is capacitive and vice versa.
There is no pure inductive load and pure capacitive load in the usual electrical appliances. Because these two loads do not do useful work.
Pure inductive or pure capacitive loads are only used in the compensation circuit. Because most of the load is resistive, most of them are inductive loads. Therefore, most of the compensation is compensated by capacitors. Therefore, pure capacitive loads are used more than pure inductive loads. Such as electric motors, transformers, etc., usually inductive loads. Some fluorescent lamps are capacitive loads.
Example:
A purely inductive load is a set of inductors. Usually used to compensate for capacitive currents in the circuit.
In a circuit with a coil in a circuit, the coil portion is a purely inductive load. Such as motors, transformers, electric fans, fluorescent lamp ballasts, etc.
The current of a purely inductive load cannot be mutated. Inductive loads are widely used. In a circuit with a capacitor, the capacitive part is a pure capacitive load. Such as compensation capacitors.
The voltage of a purely inductive load cannot be mutated. In theory: pure resistance circuit, pure capacitance circuit, pure inductance circuit does not exist.
Resistive loads also have inductive and capacitive loads when working. For example, there will be capacitance between the wires between the wires, and there will be inductance between the wires and between the wires, and the inductive load is usually larger than the capacitive load. Power capacitors also generate heat when working, that is, resistive work. The same is true for inductors. The impedance of a component is a function of frequency. Pure resistance circuits, pure capacitance circuits, and purely inductive circuits do not exist in the full frequency range.
In theory, it is only possible to exist at a certain frequency. In practice, it should not be done.
1. Harmonics: The frequency of China's power grid is 50Hz. Any wave with a frequency higher than 50Hz is called harmonic. Harmonics are generated in multiples, that is, the frequency is a multiple of 50: 100, 150, 200... Any wave above 50 Hz is called a high harmonic.
Second, load: refers to the device that consumes electrical energy, converting electrical energy into mechanical energy, thermal energy, light energy, and the like. The load refers to the use of electrical appliances, such as: lighting, lamps, electric furnaces, motors, refrigerators, air conditioners, etc.
Third, light load: Light load mainly refers to the equipment driven by the motor is relatively light, does not reach the rated power of its design, that is, the actual load is less than the design load.
4. Variable load: Variable load refers to the load that the motor is moving during the operation. It is constantly changing, sometimes heavy, sometimes light, and the power output to the motor is sometimes large and sometimes small. When the voltage is constant, the current changes as the load changes. For example: jaw crushers, various presses, stamping machines, pumping units, compressors, hydraulic presses, electric sewing machines, etc.
5. Dead load: The dead load is also called fixed load. When the motor is running, the load is basically unchanged. The output power and current of the motor are basically a constant value. Light loads may be dead loads.
6. Overload operation: Overload operation means that the motor is in an operation that exceeds its own load capacity. For example, a 55KW motor rated current is 110A, and in actual operation, the current exceeds 110A, which is overloaded operation. Equipment that has been overloaded for a long time will be damaged and its service life will be reduced.
7. Load ratio: The load ratio is the ratio of the actual operating current to the rated current. Load rate = actual working current ÷ rated current × 100%
Eight, the relationship between the rated power of the motor and the rated current: Generally speaking, the rated current of the motor is twice the rated power.
For example: a 37KW motor, its rated current is about 37 * 2 = 74A
A 100KW motor with a rated current of approximately 100*2=200A
Nine, inductive load, resistive load: For the luminaire, the luminaire that is illuminated by gas is the inductive load, and the resistive wire is a resistive load. The inductive load is such as: fluorescent lamp, high pressure sodium lamp, mercury lamp, metal halide. Lights, etc. Resistive loads such as: iodine tungsten lamps, incandescent lamps, resistance furnaces, ovens, electric water heaters, hot oils, etc. The motor is also an inductive load.
X. Actual working current of several common lights: (in the case of grid voltage 220V)
1, 400W high pressure sodium lamp single lamp, working current is 3.1 ~ 3.3A.
2, 250W high pressure sodium lamp single lamp, working current is 2.0 ~ 2.3A.
3, 400W metal halide lamp single lamp, working current is 2.0 ~ 2.2A.
4, 250W metal halide lamp single lamp, working current is 1.4 ~ 1.6A.
5, inductive ballast 40W fluorescent lamp single lamp, working current is 0.28 ~ 0.30A.
6, electronic ballast 40W fluorescent lamp single lamp, working current is 0.14 ~ 0.16A.
According to the above data, the lamp consumes electricity in addition to the light itself.
11. In the lighting circuit, if all the reactive ballasts are used, the current will drop by 30% after the power saver is installed, but the current of the electronic fluorescent lamp is basically not reduced, and the compensation device is installed in the line, and the current decreases less. .