Alternating Current System and Direct Current System (AC&DC System)
1.The DC system device has the functions of remote measurement, remote signaling, remote control, etc., which can realize unattended operation and can meet the normal operation and guarantee the opening and closing of relay protection, automatic devices, high-voltage circuit breakers, accident lighting and computer uninterrupted under accident conditions. The power supply supplies DC power or when AC power is lost, AC power is provided through an inverter device.
It is suitable for places that require DC power supply such as power plants, substations, electrified railways, petrochemicals, metallurgy, switching stations and large buildings, so as to ensure the safe and reliable operation of the equipment.
2.The AC power distribution device of the power secondary equipment is based on the the relevant provisions of "Power Plant, Substation Engineering and Relay Protection Test Instrument Configuration Quota" and the Ministry of Electric Power Industry "Power System Relay Protection and Safety Automatic Equipment Anti-accident Measures". The selection of high-breaking miniature circuit breakers protects the short circuit and overload of the circuit, provides a convenient and reliable secondary power supply for the on-site secondary equipment work, and provides a reliable guarantee for improving the quality of various work and ensuring the safety of personnel and equipment.
1.The Features of DC system device:
Microcomputer controlled high frequency switch DC system device has high voltage and steady current accuracy, small size, light weight, high efficiency, output ripple, low harmonic distortion, high degree of automation and high reliability, and can be equipped with cadmium Nickel batteries, acid-proof batteries and valve-regulated lead-acid batteries can be unattended.
2. The scope of application of the AC system device:
(1) When the output capacity of the device is fully loaded, it will automatically limit current without overloading;
(2) The device has the functions of device self-check, fault self-diagnosis, self-recovery and intelligent management.
(3) The device is controlled as a current source during operation, and there is no possibility of resonance with the system impedance