Classification of low-pressure switches:
By standard:
Full-scale test low pressure cabinet (tta)
Low-pressure switch sets and control devices that meet a recognized model or series do not have differences that may affect performance as compared to those that have been certified as meeting the standard (iec439. 1)。
Low pressure cabinets (ptta) for partial tests
A low-pressure switch set and control equipment consisting of both type-tested and non-model-tested equipment, the latter being derived from the type-tested equipment that conforms to the test。
The working principles of the low-pressure switch:
Mainly for power supply management, switching and control at power transformers. Control is achieved using the control of the automatic switch switch belt. The low-pressure smart loop cabinet is an intelligent low-pressure switch control device that enables the automatic switching of circuits between switches and alarms through simple plc programming。
Several switch cabinets can form an intelligent low voltage distribution control system with remote control and telemetry through communication networks. The second is modularization of low-pressure switches. The standardization of structural components used in low-pressure smart distribution cabinets facilitates the maintenance of equipment packages, significantly reducing the cost of later maintenance of products。
A combination of on-site logic and remote monitoring, remote reconciliation and remote information querying techniques has been introduced, with a combination of engineering and electrical equipment to modernize front-end operations, while logical control and communications management has been achieved by plc, which uses plc for low-pressure power systems。
Traditional switches are gradually being replaced by a combination of microelectronics, communication technologies, computer technology and sensory technologies。
