ABB GRID BREAKER UNIT 3BHE055094R0002

Date: Jul 23, 2025 Views: 16

　　ABB grid circuit breaker unit 3BHE055094R0002 is a critical protection and control device in the power system. It is mainly used to quickly cut off the circuit in the event of a fault or abnormality, prevent equipment damage, ensure personnel safety, and maintain the stable operation of the power grid.

　　Key features

　　High-voltage applicability:

　　Designed for medium-high voltage to ultra-high voltage power grids (refer to the technical manual for specific voltage levels, common range: 12kV-800kV).

　　Supports high rated current (such as 1250A-4000A) and short-circuit breaking capacity (such as 40kA-63kA).

　　Fast breaking technology:

　　Adopt SF6 gas insulation, vacuum circuit breaker or air circuit breaker technology to achieve millisecond-level fault disconnection.

　　High reliability:

　　Modular design for easy maintenance and upgrade.

　　Strong anti-electromagnetic interference ability, adaptable to harsh environments (such as high temperature, high humidity, salt spray).

　　Intelligent integration:

　　Support linkage with SCADA system and protection relay to achieve remote monitoring and automated operation.

　　Configurable intelligent sensors to monitor parameters such as temperature and pressure in real time.

　　Fault isolation

　　Quickly cut off short-circuit current, overload current or ground fault to prevent the fault from expanding to the entire power grid.

　　Typical breaking time: millisecond level (such as vacuum circuit breaker ≤10ms, SF6 circuit breaker ≤15ms).

　　System protection

　　Cooperate with relay protection devices (such as differential protection, distance protection) to achieve selective tripping and minimize the scope of power outage.

　　Support reclosing function to automatically restore power supply to temporary fault lines.

　　Operation control

　　Manual/automatic opening and closing to meet normal operation scheduling requirements.

　　Remote monitoring and operation (through SCADA system) to improve operation and maintenance efficiency.

　　Condition monitoring

　　Integrated sensors monitor contact wear, temperature, mechanical properties and other parameters to achieve predictive maintenance.

　　Support digital communication (such as IEC 61850 protocol) and integrate into the smart grid ecosystem.

　　Application scenarios

　　Transmission substation: protect high-voltage transmission lines and prevent faults from spreading.

　　Distribution network: ensure stable power supply to industrial and residential areas.

　　Renewable energy grid connection: support wind power and photovoltaic power stations to access the grid.

　　Industrial facilities: protect key loads such as data centers and chemical plants.

　　Rail transportation: provide safety protection for subway and high-speed rail power supply systems.

　　Key technical parameters

　　Rated voltage (Un)

　　Refers to the standard voltage for long-term operation of the circuit breaker (such as 12kV, 24kV, 110kV).

　　Rated current (In)

　　Refers to the maximum current that the circuit breaker can pass for a long time (such as 630A, 1250A, 3150A).

　　Short-circuit breaking capacity (Icu/Ics)

　　Icu (limit breaking capacity): the maximum short-circuit current (effective value) that the circuit breaker can cut off.

　　Ics (service breaking capacity): the ability of the circuit breaker to still work normally after cutting off the short-circuit current (50%-100% of Icu).

　　Mechanical life and electrical life

　　Mechanical life: the number of no-load opening and closing operations (such as 10,000 times).

　　Electrical life: the number of opening and closing operations under rated current (such as 3,000 times).

　　Operating mechanism type

　　Spring mechanism, hydraulic mechanism, permanent magnet mechanism, etc., affect the opening and closing speed and reliability.

　　Maintenance and support

　　Regular maintenance

　　Mechanical inspection: clean the operating mechanism, lubricate the rotating parts, and test the opening and closing speed;

　　Electrical inspection: measure the insulation resistance and contact resistance, and verify the protection setting value;

　　Interrupter inspection: vacuum circuit breakers need to detect the vacuum degree, and SF6 circuit breakers need to detect the gas pressure and leakage rate.

　　Spare parts management:

　　ABB provides original contacts, interrupter chambers, operating mechanisms and other spare parts.

　　It is recommended to reserve wearing parts (such as sealing rings, SF6 gas filling devices).

　　Safety precautions

　　Operation qualifications: Only certified electricians are allowed to install, debug and maintain.

　　SF6 gas treatment:

　　Special equipment is required for recovery and filling to prevent leakage.

　　Waste gas must be handled by professional organizations in accordance with environmental protection requirements.

　　Power-off operation:

　　Before maintenance, the power supply must be cut off and the warning sign must be locked.

　　Use insulating tools and protective equipment (such as insulating gloves and goggles).

　　Typical application scenarios

　　Power plant

　　Generator output circuit breaker (GCB): protect the generator from short-circuit shock.

　　Plant power system: ensure the power supply reliability of key equipment (such as boilers and steam turbines).

　　Substation

　　Incoming/outgoing circuit breakers: realize grid segmentation and load distribution.

　　Bus tie circuit breaker: quickly isolate in case of bus failure and maintain partial power supply.

　　Industrial users

　　Protect large motors, transformers and other equipment to reduce unplanned downtime losses.

　　Cooperate with capacitor compensation devices to prevent overvoltage damage to equipment.

　　Renewable energy

　　Grid-connected circuit breakers for wind power/photovoltaic power stations: ensure the safe access of new energy to the grid.

　　Energy storage system interface: realize charging and discharging switching and fault isolation.

　　FAQ

　　Q: Does the circuit breaker support DC grid?

　　A: 3BHE055094R0002 is mainly designed for AC, and special models (such as ABB HVDC circuit breakers) must be selected for DC applications.

　　Q: How to determine whether the circuit breaker needs to be replaced?

　　A: If frequent false operation, mechanical jamming, and insulation aging (such as excessive partial discharge) occur, you need to contact ABB engineers for evaluation.

　　Q: Is it compatible with third-party protection devices?

　　A: It supports common protocols such as Modbus and IEC 61850, and can be integrated with most mainstream protection relays.

　　Summary

　　ABB 3BHE055094R0002 grid circuit breaker unit is a high-performance, high-reliability grid protection device suitable for a variety of high-voltage scenarios. Its modular design, intelligent functions and global service support make it a preferred solution for grid construction.

　　Accelerate the green transformation of power equipment: ABB launches compressed gas environmentally friendly gas load switch ring network unit

　　The global environmental protection upgrade and energy transformation process are accelerating, driving the green transformation of power equipment. With the joint efforts of power grid users and manufacturers, the environmental protection solution of the ring network cabinet circuit breaker function unit has been used on a large scale in the power grid. However, as a switchgear at the end of the distribution network, the single circuit breaker solution of the ring network cabinet is difficult to meet the needs of different usage scenarios of various users, and will also increase the investment expenditure of customers. Continuously improving various application function units of the ring network cabinet is of great significance for the promotion of environmentally friendly ring network cabinets among various users.

　　Innovative breakthrough of ABB compressed gas load switch

　　In the field of power equipment, SF6 (sulfur hexafluoride) gas has long dominated the market with its excellent insulation and arc extinguishing performance, but its greenhouse effect potential is as high as 24,300 times that of CO₂1, which has become a major challenge in the global carbon reduction process. Load switch solutions are widely used in the use of ring network cabinets. Mature SF6 breaking load switches use SF6 as insulation and breaking medium, with mature technology and economical cost.

　　Faced with the industry dilemma of "environmental protection, economy and high performance" being difficult to achieve at the same time, ABB's innovative 12kV Safe Air compressed air environmentally friendly gas load switch ring network unit fills the gap in economical and environmentally friendly solutions in the field of medium-voltage ring network equipment, and provides an innovative path that is both technically feasible and economical for the green upgrade of the power grid.

　　12kV Safe Air compressed air load switch ring network unit

　　ABB's compressed air load switch adopts an innovative compressed air arc extinguishing structure, continuing the spring operating mechanism that has been verified by the market for more than 20 years to ensure the stability and reliability of the equipment. Its transmission chain strength meets the new standard GB1985-2023, and adopts a high-reliability electric field design to ensure its mechanical and electrical performance. The product can be flexibly combined with circuit breaker cabinets that meet the standard specifications of the State Grid, and supports flexible co-box solutions, enabling it to meet a variety of application scenarios and usage standards. In addition, the equipment also has flexible expansion methods, which can be expanded on the top or side, and is compatible with ABB's ring network cabinet Safe Digital digital solution, further improving the level of intelligence.

　　Three core technological breakthroughs: ABB's environmentally friendly and efficient way of compressed air environmentally friendly gas load switch

　　1. Compressed air arc extinguishing technology

　　The arc extinguishing device of ABB's compressed air load switch consists of moving and static main contacts, arc contacts and pistons. Its working principle is to use the overpressure generated by the piston compressed gas to "blow out" the arc and interrupt the load current. When the compressed air switch is closed, the arc pre-breakdown occurs at the arc contact. When opening, the arc is also ignited on the arc contact. The arc action of the entire closing and opening process is concentrated on the arc contact, which reduces the loss of the main contact, extends the maintenance cycle of the equipment, and improves the service life and stability of the equipment. Moreover, compared with the breaking technology using vacuum bubbles in series or parallel, the compressed air arc extinguishing technology has a simpler contact structure, more stable and reliable.

　　Opening process of compressed air switch:

　　The main contact is completely closed.

　　The moving contact moves downward and compresses the gas.

　　The moving contact separates first, and the arc contact separates later and generates an arc, while driving the compressed gas to flow to the arc area.

　　The gas flows to the arc area and flows out from the arc area in both directions, quickly extinguishing the arc.

　　The arc is cut off, and the moving contact and the arc contact are separated.

　　The compressed gas technology has been widely used in high-voltage circuit breakers. ABB innovatively applies the compressed gas arc extinguishing system to 12kV load switch units, overcoming the performance bottleneck of dry air medium and filling the industry gap in this field.

　　2. The "stationary point" design of the compressed gas switch, the "precise braking point" for safe power off

　　The "stationary point" principle of ABB's compressed gas load switch achieves efficient arc extinguishing through the synergistic effect of precise control of airflow and mechanical action. The core is to use the gas dynamic characteristics to form a local high-voltage area. The specific process is as follows:

　　When the switch is opened, the moving contact drives the piston to compress the insulating gas in the arc extinguishing chamber, generating a high-speed airflow blowing towards the arc. During the contact separation process, as the cross-sectional area of the airflow channel changes suddenly due to the displacement of the moving contact, the high-speed airflow velocity drops sharply to zero, and the kinetic energy is instantly converted into pressure energy, forming a "stationary point" with zero gas velocity. The local high pressure generated at this time has a dual effect: on the one hand, it compresses the arc diameter through the "thermal contraction effect" and increases the arc resistance; on the other hand, the increase in the density of the high-pressure gas significantly improves the dielectric strength and effectively suppresses the reignition of the arc.

　　This design creates better arc extinguishing conditions during the contact separation process through the precise coordination of mechanical movement and airflow dynamics. Like a precise "pneumatic brake", it avoids insufficient airflow energy due to too fast movement and prevents the arc from continuing to burn due to too slow movement. This dynamic balance ensures that the arc can be extinguished and improves the breaking capacity of the switch.

　　3. Environmentally friendly and economical dual-excellence choice

　　ABB's compressed air load switch uses dry air instead of SF6, with an extremely low leakage rate (≤0.01%), effectively reducing the impact on the environment. The switch uses dry air as the insulating medium. The dry air consists of 19.5-23.5% oxygen and the remaining nitrogen, ensuring that there will be no harm to the environment during the entire product life cycle. While ensuring the performance of the equipment, the compressed air load switch adopts a simpler and more efficient structure and design, which has a higher cost-effectiveness.

　　Solve the pain points of the industry and help green electricity

　　Against the background of accelerating green transformation globally, ABB will continue to innovate environmentally friendly power technology and launch environmentally friendly products suitable for various application scenarios such as new energy power stations, smart grids, and industrial parks. In the future, we will provide more efficient green solutions to help the power industry achieve sustainable development goals. ABB is committed to promoting the transformation of the global energy structure to a cleaner one with innovative technology and contributing to building a green future.

　　ABB is a global technology leader in the field of electrical and automation, committed to enabling a more sustainable and efficient future. By integrating engineering experience and digital technology, ABB helps various industries operate efficiently, improve energy efficiency and production efficiency, promote sustainable development, achieve excellence, and achieve integrity. ABB has a history of more than 140 years and employs approximately 110,000 people worldwide. ABB is listed on the SIX Swiss Exchange (ABBN) and Nasdaq Stockholm (ABB).
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