delta connection
2.Through analyzing the two cases of protection malfunction due to incorrect connection of open-delta connection of busbar voltage transformer, the importance of correct connection of open-delta connection when earthing fault occurring in a power system was explained.
3.The calculation and measurement methods for voltage, turns and phase-shifting angle of winding with extended delta connection in 24 pulse traction rectifier transformer are introduced.
4.The variable ratio of voltage,current and torque are analyzed when the delta-e xtended-edge connection asynchronous motor is started. On this base,the fittin g calculating formula and method have been raised to determine the tap position of stator winding and prevent inclined magnetic field.
5.Connection method includes single star and double star, relaying protection method includes open delta voltage protection, differential current protection, differential protection, neutral unbalance current protection etc.
6.These tubes have a thickness not exceeding 15mm because of skin effect. the connection between transformer and cables can include the closing of the transformer delta, and its layout wil aim at optimising and balanching the circuit reactance.
