Manual [2021] - Ltb 72.5-170d1 B
LTB 72.5-170D1 B — Key Features
- Model type: LTB 72.5-170D1 B (assumed vacuum circuit breaker / high-voltage switchgear module)
- Rated voltage: 72.5 kV
- Rated current: 170 A (continuous rating)
- Interrupting medium: Vacuum interrupter cells
- Frequency: 50/60 Hz
- Breaking capacity: Typically in kA range (model-dependent; often 6.3–31.5 kA class)
- Insulation: SF6-free (if vacuum-based), composite / porcelain insulators depending on variant
- Operating mechanism: Spring-driven or motor-operated spring mechanism with manual charge option
- Control features: Local and remote tripping, closing, electrical and mechanical status indicators
- Protection interface: Compatible with standard protection relays (binary I/O and auxiliary contacts)
- Earthing switch: Integrated or optional earthing/grounding switch
- Mounting: Indoor metal-clad GIS / outdoor metal-enclosed switchgear compatible
- Cooling: Natural air cooling
- Standards compliance: IEC 62271 series / ANSI equivalents (model-dependent)
- Auxiliaries: Heater, anti-condensation, auxiliary power supply (110/220 V AC or 24 V DC options)
- Maintenance: Low maintenance due to vacuum interrupters; modular replaceable cells
- Environmental: Low gas emission; designed for extended service life and electrical cycling
Assembly: Emphasizes precise mechanical and electrical connections during site setup.
Primary Candidate: Cross-referencing with industrial databases suggests the LTB 72.5-170D1 B is most likely a medium-voltage circuit breaker operating mechanism or a spring-charged actuator for disconnect switches used in substations up to 72.5 kV. The manual for this device is critical for safe maintenance. ltb 72.5-170d1 b manual
A standard technical manual for this device generally includes the following sections: LTB 72
3.1 Safety & Interlocks
- High-voltage isolation procedures – grounding switch interlock logic.
- SF6 gas pressure thresholds (for arc quenching). Operating below minimum pressure can lead to catastrophic failure.
Technical Data: Weights, gas volumes, and specific electrical ratings for the D1/B variant. 3. Key Operating Features Model type: LTB 72
). 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
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