DC power is widely used in hydro, thermal power plants, substations and other various types of DC equipment users (such as power plants, substations, distribution stations, petrochemical, steel, electric railway, real estate, etc.), for signaling equipment, protection, automatic equipment, emergency lighting and circuit breaker points, closing operation provides DC power, it is also widely used in the communications sector, computer rooms, hospitals, mines, hotels and high-rise buildings and reliable emergency power, wide range of uses. One: brake system programmable DC power supply "braking system" typically include two protective function that OVP & OCP function. OVP is an extremely important characteristic voltage is to prevent those who are sensitive to high voltage DUT design. If the supply voltage is detected on the output terminals exceeds the OVP set value, the power will turn off its output immediately to avoid damage to the DUT. Today's programmable DC power supply is basically using DAC setting OVP value can be set directly via the front panel OVP protection point, and easy to operate, but also through the DAC value is set OVP overvoltage protection becomes more accurate, and compared to SCR mode power supply protection circuit protection will shut down after the trigger output, while the SCR power protection in the positive and negative output short-circuit condition was not closed. II: Monitoring System monitoring system to control the entire DC system, management of the core, and its main tasks are: to the system functional units and batteries for long-term automatic monitoring, access to the system in a variety of operating parameters and status, based on the measured data and run Status timely treatment, and as a basis for system control, automatic power management system to ensure the continuity of its work, reliability and security. Monitoring system is currently divided into two types: one type is the key there is a touch-screen type. Monitoring system provides user interface, system operating parameters to achieve the display, the system controls the operation and system parameters. DC system insulation monitoring unit is a device that monitors the DC system insulation can be real-time monitoring of the line-to-ground leakage resistance, this value can be set depending on the circumstances. When the line of the insulation is reduced to the set value, it will send an alarm signal. DC system insulation monitoring unit currently has bus insulation monitoring, slip insulation monitoring. http://www.kayandz.com power inverter power, DC power supplies, DC power supply manufacturers http://www.agjixie.com shears, shears, tilting hydraulic shears http: // www .hhnhj.com vacuum kneading machine, kneading machine, kneading machine http://www.szyx1990.com ordinary full-height turnstiles, swing gates, wing gates, three roller gates, speed through the door