Stationary induction apparatus

A stationary induction apparatus comprising, as principal components:

• electric functional units for three phases each including a winding and a core;
• a tank containing the electric functional units;
• high-voltage leads leading out respectively from the windings and extended through through holes formed in a wall of the tank facing the high-voltage leads at positions laterally dislocated from positions directly opposite the windings;
• and
• low-voltage leads leading out respectively from the windings on a side opposite a side on which the high-voltage leads are extended, and extended vertically along a wall of the tank facing the low-voltage leads;
• wherein a composite shield formed by combining nonmagnetic shields and magnetic shields is placed on an inner surface of the wall of the tank facing the low-voltage leads, and the nonmagnetic shields of the composite shield are placed in positions including a region facing the low-voltage leads, are extended into a leader pocket through which the low-voltage leads are drawn out of the tank and are electrically short-circuited in the leader pocket.

A stationary induction apparatus comprising, as principal components:

• an electric functional unit including a winding and a core;
• a tank containing the electric functional unit;
• a high-voltage lead leading out from the winding and extended through a through hole formed in a wall of the tank facing the high-voltage lead at a position laterally dislocated from a position directly opposite the winding;
• and
• a low-voltage lead leading out from the winding on a side opposite a side on which the high-voltage lead is extended, extended vertically along a wall of the tank facing the low-voltage lead and through a space between the electric functional unit and a tank cover and drawn out of the tank;
• wherein a composite shield formed by combining nonmagnetic shields and magnetic shields is placed on an inner surface of the wall of the tank facing the low-voltage leads, and the nonmagnetic shields of the composite shield are placed in positions including a region facing the low-voltage lead and are extended into the tank cover.

A stationary induction apparatus comprising, as principal components:

• an electric functional unit including a winding and a core;
• a tank containing the electric functional unit;
• a high-voltage lead leading out from the winding and extended through a through hole formed in a wall of the tank facing the high-voltage lead at a position laterally dislocated from a position directly opposite the winding;
• and
• a low-voltage lead leading out from the winding on a side opposite a side on which the high-voltage lead is extended, extended vertically along a wall of the tank facing the low-voltage lead and through a space between the electric functional unit and a tank cover into a leader pocket;
• wherein a composite shield formed by combining nonmagnetic shields and magnetic shields is placed on an inner surface of the wall of the tank facing the low-voltage leads, and the nonmagnetic shields of the composite shield are placed in positions including a region facing the low-voltage lead and are extended into the leader pocket.

A stationary induction apparatus comprising, as principal components:

• an electric functional unit including a winding and a core;
• a tank containing the electric functional unit;
• a high-voltage lead leading out from the winding and extended through a through hole formed in a wall of the tank facing the high-voltage lead at a position laterally dislocated from a position directly opposite the winding;
• and
• a low-voltage lead leading out from the winding on a side opposite a side on which the high-voltage lead is extended, extended vertically along a wall of the tank facing the low-voltage lead and through a space the electric functional unit and a tank cover;
• wherein a composite shield formed by combining nonmagnetic shields and magnetic shields is placed on an inner surface of the wall of the tank facing the low-voltage lead, and the nonmagnetic shields of the composite shield are placed in positions including a region facing the low-voltage lead and are extended from a leader pocket through which the low-voltage lead is drawn out of the tank through the tank cover into a leader pocket through which the high-voltage lead is drawn out of the tank.