PURPOSE: To effectively separate an electromagnetic pump and a power source system by dividing a coil, connecting one of the divided coils to a normal use power source and the other to an emergency power source.
CONSTITUTION: A ringlike coil 20 of an electromagnetic pump is divided into two types of A and B blocks, and one electromagnetic pump wirings 22 for one pump are connected in each of the A and B blocks. An emergency power source 13 is connected to the coil of the A block through leads 23, and a normal power source is connected from a normal bus to the coil of the B block through a variable frequency power source 10 via coil terminals 24. Thus, since a service responsive to a plant operation is performed by the power sources completely separated to block safety and non-safety systems, the reliability, safety of the plant are improved. Since the pump is divided into the blocks by the wirings in the power source coils, the pump of compact and simple connecting structure is obtained as a large-capacity main circulation pump.
JP4064584 | Electromagnetic pump |
JP2015065778 | SOLENOID PUMP AND MANUFACTURING METHOD THEREFOR |
JP4234877 | Conductive melt flow control device |