Always ground both sides of the breaker before performing physical maintenance.
Never operate or maintain this equipment without the original manual. An incorrect spring charging procedure or SF6 pressure misinterpretation can result in arc flash, equipment destruction, or fatal injury. ltb 72.5-170d1 b manual
). It is designed for rated voltages between 72.5 kV and 170 kV and can withstand breaking currents up to 40 kA. Hitachi Energy Publisher Core Technical Specifications Specification Rated Voltage 72.5 kV – 170 kV Rated Continuous Current Up to 3150 A Short-Circuit Breaking Current Up to 40 kA Operating Principle Auto-Puffer™ (Self-Blast interrupter) Insulation Medium Operating Mechanism Motor-charged spring (BLK, MSD, or FSA) Installation Standard Compliance IEC 62271-100, IEEE Operating Principles The LTB D1/B uses Auto-Puffer™ technology Always ground both sides of the breaker before
Often caused by a blown fuse in the control circuit or a limit switch that hasn't reset in the motor mechanism. or fatal injury.