Ltb 72.5-170d1 B Manual Instant
SF6 is a potent greenhouse gas. Always use recovery units; never vent gas into the atmosphere. 6. Troubleshooting Common Issues
Available in single-pole or three-pole operation . 2. Manual Content Structure
Figure 2-1. Controls and Indicators
| 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
The "heart" of the breaker, containing the springs, motors, and trip/close coils.
is a non-toxic gas but can cause suffocation in confined spaces. The manual strongly emphasizes safety protocols when handling SF6cap S cap F sub 6
Gas Filling: The poles are shipped filled with gas, but they must be checked and filled to the rated pressure ( SF6 is a potent greenhouse gas
Usually indicates a temperature drop or a slow leak. Check the temperature-compensated pressure chart in your manual.
Install the support frames and secure them.
While each specific unit varies, based on analogous industrial actuators, here are the likely specifications you will find within the : Controls and Indicators | Parameter | Typical Value
Always refer to the specific serial-number-linked manual provided by the manufacturer (e.g., Hitachi Energy/ABB) for the most accurate torque values and wiring diagrams.
Usually consists of three separate poles, each containing a breaking unit and a puffer cylinder. Gas System:
3-1. General 3-2. PMCS Introduction 3-3. Cleaning 3-4. Painting
It utilizes the BLK 222 motor-spring mechanism, known for its mechanical reliability in outdoor environments.
Form Approved OMB No. 0704-0188 Public reporting burden for the Report Documentation Page... estimate includes the time for reviewing instructions... Washington, DC 20503.
