Characteristics of isolation switches
When repairing electrical equipment, provide an electrical isolation and a clearly visible disconnect point to ensure the personal safety of maintenance personnel [3]. 2. Isolating switches cannot be operated under load: They cannot be operated under rated load or heavy load, and cannot switch on/off load current and short-circuit current. However, those with arc-extinguishing chambers can be operated under light load and no-load lines.
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How many types of circuit breakers are there?
By the number of poles: there are single-pole, double-pole, three-pole and four-pole, etc.; By installation method: there are plug-in, fixed and drawer types, etc.
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Why are imported servo motors expensive?
Servo motors are widely used in various industrial automation projects and are important components of industrial control systems. Currently, the domestic market for servo motors is dominated by imported brands. Compared to domestic servo motors of the same level, imported servos are often more expensive. Below, we analyze the reasons. 1. Affected by tariffs, the selling price of imported servos needs to increase...
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The function of the isolation switch
After switching off, establish a reliable insulation gap to isolate the equipment or line that needs to be inspected and repaired from the power source with a clear disconnection point to ensure the safety of maintenance personnel and equipment. 2. Change the line according to the operation needs. 3. It can be used to switch on and off small currents in the line, such as the charging current of bushings, busbars, connectors, short cables, the capacitive current of switch equalizing capacitors, the circulating current during double busbar switching, and the excitation current of voltage transformers, etc.
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Main characteristics of circuit breakers
The main characteristics of circuit breakers include: rated voltage Ue; rated current In; tripping current setting range of overload protection (Ir or Irth) and short-circuit protection (Im); rated short-circuit breaking current (industrial circuit breaker Icu; household circuit breaker Icn), etc. Rated operating voltage (Ue): This is the voltage at which the circuit breaker operates under normal (uninterrupted) conditions
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How many types of relays are there?
Electromagnetic relay: An electric relay that works by using the attraction force generated between the electromagnetic iron core and armature in the input circuit. (2) Solid-state relay: A relay in which electronic components perform their functions without mechanical moving parts, and the input and output are isolated. (3) Temperature relay: A relay that operates when the ambient temperature reaches a given value.
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