Today, we will briefly introduce the contents of the standard for the purchase of automatic diesel generators.
Appearance requirements: the boundary dimension, installation dimension and connection dimension of the diesel generator shall comply with the factory drawing approved by the specified procedure; The welding of diesel generator shall be firm, the weld shall be uniform, without defects such as weld penetration, undercut, slag inclusion and air hole, and the welding slag and flux shall be cleaned; The paint film shall be uniform without obvious cracks and peeling; The coating shall be smooth without missing spots, rust and other phenomena; The fasteners of diesel generator shall not be loose; The electrical installation of the diesel generator shall comply with the circuit diagram, and the connection of each conductor of the diesel generator shall have obvious signs that are not easy to fall off; The diesel generator shall have a well grounded terminal; The diesel generator nameplate is complete.
Insulation resistance, insulation strength and insulation resistance: the insulation resistance of each independent electrical circuit to the ground and between circuits shall be greater than 2M; Insulation strength: each independent electrical circuit of the diesel generator shall be able to withstand the AC test voltage for 1min to the ground and between circuits, without breakdown or flicker. Loop voltage test voltage<100V 750V ≥ 100V 1440V.
Phase sequence requirements: the phase sequence of the terminal blocks of the diesel generator control panel shall be sorted from left to right or from top to bottom from the front of the control panel.
Requirements for the automatic diesel generator to maintain the state of readiness for operation: the diesel generator shall be equipped with a heating device to ensure that the oil temperature and cooling medium temperature during emergency starting and rapid loading are not lower than 15 ℃.
Check the reliability of automatic startup power supply and automatic shutdown: diesel power generation shall be able to start automatically after receiving the start command of automatic control or remote control; When the diesel generator fails for the third time after the automatic start, the start failure signal shall be sent; When a standby diesel generator is set, the program start system shall be able to automatically transmit the start command to another standby diesel generator; The time from automatic start command to power supply to load shall not exceed 3min; After the automatic start of diesel generator is successful, the first load shall not be less than 50% of the rated load; The diesel generator shall be able to stop automatically after receiving the shutdown command of automatic control or remote control; For the standby diesel generator used in conjunction with the mains power grid, when the power grid returns to normal, the diesel generator shall be able to automatically switch or automatically stop, and its shutdown mode and shutdown delay time shall comply with the product technical conditions; Automatic startup success rate. The success rate of automatic startup shall not be less than 99%.