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2023-06-29 10:31

What is conducted current?

Under the action of electric field force, the electric charge that can move freely in the object (called free charge) moves regularly relative to the object, and the current formed is called conduction current. Metal, graphite, electrolyte, conductive gases and other conductors in the current, glass, rubber, oil and other insulators in the leakage current, conductivity between conductors and insulators in the semiconductor in the current, etc., are conduction current. In superconductors, currents that can flow continuously once excited and no longer require an external electric field to maintain them are also generally referred to as conduction currents.

2023-06-29 10:31

What are the operating voltages specified for high voltage appliances?

A high-voltage appliance is an appliance with an operating voltage of 220 kV and higher?

2023-06-29 10:29

What points must be observed when using current transformers?

(1) The secondary winding of the current transformer is firmly grounded to prevent personal accidents; (2) The impedance value of the secondary winding circuit must not exceed the permissible limit, otherwise the accuracy will be reduced; (3) The secondary winding of the current transformer is not allowed to open circuit.

2023-06-29 10:28

What are the manifestations of overcurrent problems in electromechanical equipment installations?

What are the manifestations of overcurrent problems in electromechanical equipment installations? (1) pump: bearing damage, rotor and shell friction, foreign objects in the pump. (2) motor: power is small, overload current setting is small, line resistance is high, the power supply lack of phase. (3) Process operation: the medium delivered exceeds the design capacity of the pump, such as high density, high viscosity, high demand and so on.

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