Ltb 72.5-170d1 B Manual ~upd~

Easy to transport and assemble on-site; individual poles can be serviced independently.

circuit breakers rely entirely on the mechanical energy of a spring drive to compress gas and blast the electrical arc. The LTB 170D1/B utilizes an optimized design.

[Name Redacted] Document Control Officer

| Parameter | Typical Value / Range | | :--- | :--- | | | 72.5 kV AC (for switchgear) or 24-48V DC (for actuator motor) | | Rated Current (Mechanism) | 1250A - 2500A (depending on contact configuration) | | Stroke Length | 170 mm (the "170" in the model) | | Spring Charge Time | ≤ 15 seconds (manual crank) or ≤ 5 seconds (motorized) | | Operating Temperature | -25°C to +55°C | | Mechanical Endurance | 10,000 operations (Class M1 or M2) | | Weight (Complete Mechanism) | Approximately 35-50 kg | | Protection Class | IP54 (dust-protected and splash-proof) | ltb 72.5-170d1 b manual

This specific model is rated for system voltages between 72.5 kV and 170 kV , making it a versatile choice for transmission and sub-transmission networks.

Chapter 2 OPERATING INSTRUCTIONS

This breaker is a workhorse of the medium-to-high voltage transmission grid. It uses SF6 gas for insulation and arc quenching. The (likely revision B) is crucial because it incorporates field updates from previous revisions—ignoring it could mean missing a critical torque specification. Easy to transport and assemble on-site; individual poles

: Regular maintenance is vital to extend the lifespan of the equipment and prevent unexpected failures. The manual includes maintenance schedules, recommended practices, and troubleshooting tips to address common issues.

Periodic verification of switching times, speeds, and the simultaneous closing of all three contacts. Key Technical Data (Representative) Specification Value/Type Rated Voltage 72.5 kV – 170 kV Max Breaking Current Up to 40 kA Operating Mechanism BLK 222 / FSA 1 Insulation Medium Operating Temperature -50°C to +40°C (typical) LTB 72.5-170D1/B Circuit-Breaker Manual | PDF - Scribd

The LTB 72.5-170D1/B uses state-of-the-art gas-insulated interruption technologies to protect electrical grids from short circuits and overloads. Specification Details ABB AB / Hitachi Energy Rated Voltage 72.5 kV to 170 kV Rated Breaking Current Up to 40 kA Continuous Rated Current Up to 3150 A Insulating Medium SF6SF sub 6 Gas (Sulfur Hexafluoride) Operating Mechanism Options BLK 222, FSA 1, or Motor Drive Operation Configuration Available in 1-pole or 3-pole configurations The Auto-Puffer™ Interruption Principle [Name Redacted] Document Control Officer | Parameter |

Understanding the full scope of the operational manual is essential for high-voltage engineers, protection personnel, and substation field technicians. Technical Specifications & Core Ratings

piping manifolds linking all poles to the central diagnostic block.

SF6 density changes with temperature. The manual contains a chart that tells you the correct pressure at 20°C. If you don't use this chart, you will either vent gas unnecessarily or leave the breaker under-filled.