Intelligent capacitor automatic compensation device of protection and control

Intelligent capacitor automatic compensation device of protection and control of

in addition to the conventional protection and control, there are some special problems need attention. We encountered in the actual engineering of some easy to ignore in the protection system design and debugging process, in this simple introduction. In actual engineering, according to the number of motor, generally USES step 7 ~ 8 control inputs.

protection system in addition to the routine overvoltage and overcurrent protection, must pay attention to the three phase protection, avoid caused by single phase fault protection failure and failure. The rational allocation of limited flow reactor, strictly prevent the damage caused by the electromagnetic resonance phenomenon.

in addition, the protection system must pay attention to in the automatic compensation capacitor, the capacitor on the voltage superposition problem, when a group of capacitor exit after the operation, before reclosing, must ensure that its full discharge after put into operation. To ensure its back into its residual voltage value reduced to allow the voltage range, avoid due to reinvest superposition of residual voltage and rated voltage of the overvoltage in capacitor damage.

the control system, need special attention is that phase of the check work power, signal power and so on the correct configuration. Right vector configuration is a powerful guarantee for equipment debugging can smoothly and minimum requirements, otherwise, can bring needless trouble to debugging and increase many unnecessary work, that may sometimes is not the right conclusion.

the design of the control system with the use of slightly different components of different structure. For example: the compensation device of contactor, if use electromagnetic vacuum contactor, open/stop is a signal of the 1 & ndash; Zero state, if use institutional contactor or using vacuum circuit breaker, the open/stop must be two independent signals. Two kinds of control each have advantages and disadvantages, from the perspective of energy saving, noise and other different have different conclusions. Different people have different views on the same thing. Design can be used on the basis of the condition of the engineering economic, reasonable and practical and advanced technology equipment.

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