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General| Brand | Siemens |
|---|---|
| Model | 3AP2-FI |
| Category | Circuit breakers |
| Language | English |
These operating instructions apply to high-voltage circuit-breakers and familiarize personnel with design and function.
During operation, parts of the circuit-breaker are live and under hazardous voltages or gas pressure.
Danger to installation personnel from hazardous voltage, SF6-gas, and falling parts during installation.
The circuit-breaker is supplied as a pretested modular assembly. Guidelines for packing, checking, and storage.
Use of specific cleaning liquids, lubricants, and corrosion protection agents for maintenance and installation.
Instructions for assembling the circuit-breaker using supplied bolts, including torque specifications.
Steps for installing the circuit-breaker, including requirements, assembly on pillars, and component connections.
Procedures for earthing the breaker base and connecting high-voltage conductors.
Detailed steps for evacuating and filling the circuit-breaker with SF6 gas, including safety precautions.
Procedures for performing test operations on the circuit-breaker after installation.
Essential checks to be performed before commissioning the circuit-breaker.
Ensuring reliable circuit-breaker function through correct inspection and maintenance practices.
Safety regulations to prevent hazards to maintenance personnel during inspection and maintenance.
Overview of work to be done in individual checks/inspections as per the maintenance schedule.
Detailed descriptions of work steps to be carried out according to the maintenance schedule.
Key technical data including type, standards, operating temperatures, insulation, and electrical characteristics.
Description of the circuit breaker's main components and overall design.
Details on the identical design of the three pole columns and their components.
Sectional view and description of the interrupter unit, its contacts, and internal mechanisms.
Explanation of the arc quenching process during opening operations using SF6 gas.
General presentation and description of the spring drive mechanism for circuit breaker operation.
Detailed description of the function of the spring drive mechanism components and their operation.
Overview of the control system, including cubicles and operating mechanism housings.
Description of the IK-3 reference contact system, its function, and components.
This section contains information on the operation of the circuit-breaker.
Procedures and safety warnings for closing and opening operations of the circuit breaker.
Monitoring SF6 gas pressure, response values, and actions for low pressure.
Conditions that trigger a general lockout, preventing further operation due to low SF6 pressure.
Explanation of the mechanical reclosing lockout that prevents switching back on after a closing operation.
Relationship between breaking current and the maximum permissible number of interruptions.
Recommended procedure for recognizing and assessing irregularities in circuit breaker operation.
Guidelines for environmentally compatible disposal of the circuit breaker and its components.
Ensuring reliable operation through correct inspection and maintenance practices.
Details on offered inspection and maintenance services based on operating wear and time intervals.
Requirements for qualified personnel to carry out inspection and maintenance services.
Information on maintenance kits containing spare parts required for specific services.
Determining the starting date for the inspection and maintenance schedule.
Safety regulations to prevent hazards to maintenance personnel during inspection and maintenance.
Detailed description of work steps for checks and maintenance as per the schedule.
Visual checks of the circuit-breaker without dismantling, including SF6 filling and parts condition.
Procedures for drawing off, evacuating, and filling the circuit-breaker with SF6 gas.
Inspection of the contact system and replacement of filter material.
Procedures for checking gas pressure gauges and testing the function of density monitors.
Methods for checking new connections for leaks after SF6 gas filling.
Checks for the auxiliary switch, spring drive mechanism, trip coil, and latching blocks.
Functional checks for trip circuits, lockouts, anti-pumping, and triple-pole operation features.
Procedures for measuring SF6 gas humidity (dew point) and air content.
Checking paintwork for damage and documenting any special occurrences since last maintenance.
Fields for customer, inspector, substation, feeder, circuit breaker type, and date.
Recording serial number, rated voltage, current, pressure, and circuit diagram information.
Selection of switching duties such as overhead line, generator, coupling, transformer, cable, capacitor.
Checks for delivery completeness, visual damage, operating mechanism, control, and SF6 filling.
Verification of electrical circuits, heaters, evacuation, filter charging, and protective gas filling.
Checking motor settings, MCBs, anti-condensation heaters, SF6 system pressure, and safety switching.
Performing OPEN-CLOSE operations, checking lockouts, signals, and anti-pumping features.
