high-voltage current; high-tension current
Technical term used in electrical engineering and power systems.
高圧電流が流れているので、触らないでください。
High-voltage current is flowing, so please do not touch it.
高電圧 refers to high voltage itself, while 高圧電流 specifically means the current flowing at high voltage.
低圧電流 is the opposite, meaning low-voltage current.
Compound of 高圧 (high voltage) and 電流 (electric current).