ABB AX18-30-10-84 Circuit Breaker | VD4, 8.4kV, 31.5kA, 3000A, Spring Operated Specs

ABB AX18-30-10-84 Circuit Breaker | VD4, 8.4kV, 31.5kA, 3000A, Spring Operated Specs

ABB AX18-30-10-84 medium voltage vacuum circuit breaker specifications. VD4 series, 8.4kV, 3000A, 31.5kA, spring-operated, 3-pole, draw-out. For MV switchgear applications.

Product Overview

The ABB AX18-30-10-84​ is a medium voltage vacuum circuit breaker​ from ABB's VD4 series, specifically configured for 8.4kV applications​ with a rated current of 3000A​ and a short-circuit breaking capacity of 31.5kA. The breaker is a three-pole, spring-operated, draw-out​ unit designed for installation in indoor metal-enclosed switchgear. The alphanumeric code uniquely identifies its voltage, current, and interrupting ratings according to ABB's standardized designation system.

Model Number Decoding (AX18-30-10-84)

Technical Specifications

Note: Specifications are based on ABB VD4 series technical data. Control voltage, auxiliary contacts, and communication options are configurable. Always verify with the specific order configuration sheet.

Key Features

• Vacuum Interruption Technology:​ Maintenance-free, reliable arc quenching

• Spring Operating Mechanism:​ Consistent operating speed, motor charged

• Draw-out Design:​ Easy maintenance and testing (Connected/Test/Disconnected positions)

• High Breaking Capacity:​ 31.5kA interrupting rating for demanding applications

• Long Electrical & Mechanical Life:​ Reduced maintenance requirements

• Integrated Safety Interlocks:​ Prevents unsafe operation

• Motor Charging:​ Automatic spring charging after operation

• Position Indication:​ Clear visual status of breaker position

• Flexible Control Options:​ Multiple control supply voltages and auxiliary contact configurations

• Global Standards Compliance:​ IEC and ANSI standards compatibility

Breaking Capacity Characteristics

Mechanical Characteristics

Control and Auxiliary Specifications

Typical Applications

• Industrial Power Distribution:​ Primary protection for large motors, transformers, feeders

• Power Generation:​ Generator circuit breakers, station service

• Infrastructure:​ Data centers, hospitals, airports

• Oil & Gas:​ Offshore platforms, refineries

• Mining:​ High-current distribution

• Utilities:​ Substation feeder protection

• Any MV application​ requiring 3000A, 31.5kA breaking capacity at 8.4kV

Important Technical Notes

1. Configuration Verification:​ The part number AX18-30-10-84 defines basic ratings. Actual configuration (control voltage, aux contacts, options) is defined in the full order code.

2. Switchgear Compatibility:​ Must be installed in compatible ABB or third-party switchgear cell designed for VD4 breakers.

3. Control Voltage:​ Must match the installed control supply. Breaker may have separate motor and control circuits.

4. Maintenance Intervals:​ Despite being maintenance-free vacuum interrupters, mechanical parts require inspection per manufacturer schedule (typically 10,000 operations or 10 years).

5. Testing Requirements:​ Regular primary injection testing and timing analysis recommended.

6. Safety:​ Follow strict safety procedures (LOTO) when racking breaker. Use correct racking tool.

7. Environmental Conditions:​ For indoor installation only. Standard ambient: -5°C to +40°C.

8. Transportation:​ Must be secured in transport position. Vacuum interrupters are fragile.

9. Spare Parts:​ Use only ABB-approved spare parts for maintenance.

10. Documentation:​ Keep original test reports and manuals for maintenance and safety compliance.

Note: This data sheet provides general specifications for the ABB AX18-30-10-84 circuit breaker. For complete installation guidelines, wiring diagrams, maintenance procedures, and safety instructions, consult the official ABB VD4 Technical Manual​ and the specific order configuration documents. Installation and maintenance should be performed by qualified personnel only.