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GE 51X1207BB01SA Vacuum Circuit Breaker
GE 51X1207BB01SA
1. Overview
GE 51X1207BB01SA is a three-phase vacuum circuit breaker with a rated current of 1200 A and a rated voltage of 12 kV. It is mainly used for high-voltage power distribution and motor protection in fields such as power plants, substations, rail transit, petrochemicals, and metallurgy.
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2. Main Parameters
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Parameter
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Specification
|
|---|---|
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Rated Voltage
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12 kV (UL 489, IEC 62271-100)
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|
Rated Current
|
1200 A (Continuous)
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|
Pole Number
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3P (Three-pole)
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|
Pole Spacing
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30 mm
|
|
Breaking Capacity
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12 kV / 42 kA (IEC 62271-100)
|
|
Arc Extinguishing Medium
|
Vacuum
|
|
Contact Material
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Aluminum Alloy (or Aluminum-Copper Alloy)
|
|
Service Life
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10⁶ times (Mechanical Life) / 10⁴ times (Arc Life)
|
|
Withstand Voltage
|
150 kV (U₀)
|
|
Insulation Level
|
2.5 (IEC)
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|
Operation Mode
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Electromechanical (Motor-Operated) or Manual
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|
Control Voltage
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110 V AC / 24 V DC (Optional)
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|
Protection Level
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IP20 (Indoor) / IP54 (Dust and Drip Proof)
|
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3. Product Features
Vacuum Arc Extinguishing Technology
The vacuum medium has an extremely short arc extinguishing time (<1 ms), which can effectively limit inrush current and arc power, greatly reducing the impact on electrical equipment.
High Reliability and Low Maintenance
Adopting a fully sealed structure, there is no risk of oil or gas leakage, and the contact life is long (about 10⁴ times) with long maintenance intervals.
Compact Structure
Compared with traditional SF₆ or oil circuit breakers, it has a smaller volume and lighter weight, which is convenient for installation and power distribution room layout.
Fast Operation
The operation time is short (about 0.2 s), with current, voltage and timing protection functions.
Intelligent Control
Optional GE Grid Automation telecontrol unit, supporting SCADA integration, remote monitoring and data collection.
Environmental Protection
It does not contain freon or oil medium, complying with the current green power equipment standards.
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4. Structure and Composition
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Component
|
Function Description
|
|---|---|
|
Vacuum Interrupter
|
The core arc extinguishing component with an internal vacuum degree higher than 10⁻⁶ Pa; the arc extinguishing performance determines the breaking capacity.
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Contacts
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Including moving contacts, static contacts and auxiliary contacts, usually made of aluminum alloy.
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Operating Mechanism
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Including spring mechanism, gearbox and motor (or handwheel), responsible for fast opening and closing.
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Control Unit
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Including overcurrent, overvoltage relays and auxiliary contacts, providing protection logic.
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End Cover and Housing
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Sealed structure, dustproof and moisture-proof, protecting internal components.
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|
Cooling System
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Although it is a vacuum circuit breaker, the main body adopts a metal housing for heat dissipation.
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5. Application Fields
- Power Plants: High-voltage side of main transformers, generator set protection, excitation systems.
- Substations: Main wiring, tap changers, load switches.
- Industrial Power Distribution: Protection of large motors (such as steelmaking, mining, chemical industry), main circuits of distribution boards.
- Rail Transit: Traction substations and power supply systems.
- Construction Engineering: Main power supply for large commercial complexes, airports, etc.
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Our company specializes in discontinued control system components and boasts significant inventory advantages. We have a large stock of surplus control system parts and discontinued control system hardware. In addition, we have launched many new hardware and products to support your existing control systems or the application of new control technologies. We provide complete machines and accessories of discontinued “DCS system spare parts, PLC module spare parts” series. We have strong advantages — as long as you need PLC products, we can help you find them. Our company also has an excellent price advantage.
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