The GL series is safer and more reliable that previous circuit breakers designs. It offers a new generation of spring-spring operating mechanism that enables quick and easy onsite installation. The improved GL series is safer and more reliable. It offers a new generation spring-spring operating mechanism that enables quick and easy onsite installation.
This range of Live Tank Circuit Breakers can be used everywhere in the energy field even in highly seismic, highly polluted and low temperature environments. The breakers benefit from single and three pole application and their low energy operation makes them a cost-effective option.
The GL Live Tank Circuit Breaker range includes breakers using single or double motion technology and reduced chamber size. Both, porcelain and composite insulators are available.
XD/GE Live Tank Circuit Breakers Supporting voltage ratings up to 550kV, XD|GE high voltage Live Tank Circuit Breakers have been engineered to handle the demanding switching duties and environmental conditions required to operate and maintain reliable transmission systems.
Switches for HVDC applications are designed to close and open very rapidly in case of fault or for maintenance purposes. The switches may have to commutate load current while maintaining the flow of power within DC substation and its availability.
All HVDC switches are activated by the highly reliable spring-spring mechanism and benefit of a huge experience and installed base of AC circuit-breaker technology delivered worldwide in regards to design technology, to quality in terms of supplier qualification, assembly processes and ISO conformity.
HVDC Switches
Where more than one HVDC Pole share a common transmission conductor (typically the neutral) it is advantageous to be able to commutate the DC current between transmission paths without interrupting the DC power flow.
NBGS – Neutral Bus Ground Switch
This switch is normally open but when closed it solidly connects the converter neutral to the station earth mat. Operation with this switch can normally be maintained if the converter can be operated in a bipole mode with balanced currents between the poles, that is, the DC current to earth is very small. The switch is also able to open, commutating a small DC unbalance current out of the switch and into the DC circuit.
NBS – Neutral Bus Switch
A NBS is in series with the neutral connection of each pole. In the event of an earth fault on one pole, that pole will be blocked. However, the pole remaining in service will continue to feed DC current into the fault via the common neutral connection. The NBS is used to divert the DC current away from the blocked pole to ground.
GRTS – Ground Return Transfer Switch
The connection between the HVDC conductor and the neutral point includes both a high voltage disconnector and a GRTS and is used as part of the switching operation to configure the HVDC scheme as either a ground return monopole or a metallic return monopole. The disconnector is maintained open if the HV conductor is energized in order to isolate the medium voltage GRTS from the high voltage.
The GRTS is closed, following the closing of the disconnector in order to put the HV conductor in parallel with the earth path. The GRTS is also used to commutate the load current from the HV conductor transferring the path to the earth (or ground return) path. Once current flow through the HV conductor is detected as having stopped, the disconnector can be opened, allowing the HV conductor to be re-energised at high voltage.
MRTB – Metallic Return Transfer Breaker
The MRTB is used in conjunction with the GRTS to commutate the DC load current between the earth (ground return) and a parallel, otherwise unused, HV conductor (metallic return).
The MRTB closes in order to put the low impedance earth return path in parallel with the metallic return path. The MRTB must also be able to open, causing current flowing through the earth return to commutate into the much higher impedance metallic return path.
GE offers a comprehensive range of dead tank circuit breakers that support a voltage rating up to 550 kV, and are capable of carrying a continuous current up to 5,000 A. GE's circuit breakers meet or exceed the latest IEEE/ANSI and IEC standards, including C2 and M2. They can be gang operated up to 245 kV, and Independent Pole Operation (IPO) is available at all voltage levels.
The DT Series from GE is characterized by advanced self-blast interrupters, leak resistant cast aluminum enclosures and durable low energy mechanisms. More than 120,000 circuit breakers with self-blast interrupters and spring-spring operated mechanism have been in service since 1989, including more than 30,000 dead tank circuit breakers.
The SF6 dead tank circuit breakers assure a high level of reliability on a daily basis, even under extreme conditions such as low temperatures, highly active seismic areas, regions with high pollution levels, and a corrosive atmosphere.
GE's Dead Tank Circuit Breakers, the DT Series, supports system voltages from 38 kV to 550 kV and are designed for reliable performance, maximized safety and lower cost of ownership. The DT Series is designed to operate within extreme environmental conditions including high elevation, very low and high temperatures (-60 °C to +60 °C ), seismic zones, polluted areas and corrosive atmospheres.
XD/GE Dead Tank Circuit Breakers
XD|GE offers a comprehensive range of Dead Tank Circuit Breakers that support a voltage rating up to 800 kV and are capable of carrying a continuous current up to 5000A. For circuit breakers rated 363kV and above, the design features a fully integrated, maintenance free, hydro-mechanical operating mechanism, maximizing device stability and long-term reliability.
Increased Availability, Enhanced Protection and Simplified Operations for Power Plants
GE's Generator Circuit Breakers (GCBs) are ideally suited for new and refurbished power plants from 50 MW to 1,500 MW and feature advanced technology with spring-spring-operated mechanisms. The comprehensive GCB portfolio provides solutions from generator circuit breakers without enclosure to customized solutions including disconnector, earthing switch, starting switch and instrument transformers.
Equipment for Power Plants from 50 to 200 MW
Equipment for Power Plants from 150 to 450 MW
Equipment for Power Plants from 450 to 1,000 MW
Equipment for Power Plants from 700 to 1,500 MW
HYpact is a hybrid compact switchgear assembly that typically consists of circuit breakers, disconnectors, and earthing switches located in a common gas tank. Current and voltage transformers can be added and the standard SF6 to air bushings can be replaced with cable connectors. Its modular design allows for a large variety of different layout configurations and enables a more economical substation design.
HYpact is well suited for heavily polluted environments and is the high-performing choice in regions exposed to seismic activity. Its compact design with low center-of-gravity is ideal for withstanding seismic acceleration, as proven by shaking table tests and finite elements method simulations. HYpact customers also benefit from long maintence-free periods with reduced exposure to environmental influences and a low number of bushings and moveable contacts.
Compact switchgear
GE’s Compact Air-Insulated Breaker Assembly (CABA) is a modular, compact switchgear system combining a live tank circuit breaker, double sided disconnect switch and other AIS equipment mounted on a common frame. It can be installed in greenfield substations or retrofit into an existing substation. CABA can be installed on existing foundations and is designed for space savings due to its compactness.
This flexible, compact breaker assembly is well suited for a variety of applications including transformer protection, line and cable switching, capacitor bank and back-to-back switching, reactor switching and circuit switching.
GE’s Digital Solutions for Circuit Breakers provide operators with the actionable intelligence and controls needed to ensure asset performance while reducing maintenance and operational costs. Through non-invasive sensors, these solutions provide active monitoring and control of key operational parameters and functions.
CBWatch Circuit Breaker Monitoring
CSD100 Point-on-Wave Controller
The GL series is safer and more reliable that previous circuit breakers designs. It offers a new generation of spring-spring operating mechanism that enables quick and easy onsite installation. The improved GL series is safer and more reliable. It offers a new generation spring-spring operating mechanism that enables quick and easy onsite installation.
This range of Live Tank Circuit Breakers can be used everywhere in the energy field even in highly seismic, highly polluted and low temperature environments. The breakers benefit from single and three pole application and their low energy operation makes them a cost-effective option.
The GL Live Tank Circuit Breaker range includes breakers using single or double motion technology and reduced chamber size. Both, porcelain and composite insulators are available.
XD/GE Live Tank Circuit Breakers Supporting voltage ratings up to 550kV, XD|GE high voltage Live Tank Circuit Breakers have been engineered to handle the demanding switching duties and environmental conditions required to operate and maintain reliable transmission systems.
Switches for HVDC applications are designed to close and open very rapidly in case of fault or for maintenance purposes. The switches may have to commutate load current while maintaining the flow of power within DC substation and its availability.
All HVDC switches are activated by the highly reliable spring-spring mechanism and benefit of a huge experience and installed base of AC circuit-breaker technology delivered worldwide in regards to design technology, to quality in terms of supplier qualification, assembly processes and ISO conformity.
HVDC Switches
Where more than one HVDC Pole share a common transmission conductor (typically the neutral) it is advantageous to be able to commutate the DC current between transmission paths without interrupting the DC power flow.
NBGS – Neutral Bus Ground Switch
This switch is normally open but when closed it solidly connects the converter neutral to the station earth mat. Operation with this switch can normally be maintained if the converter can be operated in a bipole mode with balanced currents between the poles, that is, the DC current to earth is very small. The switch is also able to open, commutating a small DC unbalance current out of the switch and into the DC circuit.
NBS – Neutral Bus Switch
A NBS is in series with the neutral connection of each pole. In the event of an earth fault on one pole, that pole will be blocked. However, the pole remaining in service will continue to feed DC current into the fault via the common neutral connection. The NBS is used to divert the DC current away from the blocked pole to ground.
GRTS – Ground Return Transfer Switch
The connection between the HVDC conductor and the neutral point includes both a high voltage disconnector and a GRTS and is used as part of the switching operation to configure the HVDC scheme as either a ground return monopole or a metallic return monopole. The disconnector is maintained open if the HV conductor is energized in order to isolate the medium voltage GRTS from the high voltage.
The GRTS is closed, following the closing of the disconnector in order to put the HV conductor in parallel with the earth path. The GRTS is also used to commutate the load current from the HV conductor transferring the path to the earth (or ground return) path. Once current flow through the HV conductor is detected as having stopped, the disconnector can be opened, allowing the HV conductor to be re-energised at high voltage.
MRTB – Metallic Return Transfer Breaker
The MRTB is used in conjunction with the GRTS to commutate the DC load current between the earth (ground return) and a parallel, otherwise unused, HV conductor (metallic return).
The MRTB closes in order to put the low impedance earth return path in parallel with the metallic return path. The MRTB must also be able to open, causing current flowing through the earth return to commutate into the much higher impedance metallic return path.
GE offers a comprehensive range of dead tank circuit breakers that support a voltage rating up to 550 kV, and are capable of carrying a continuous current up to 5,000 A. GE's circuit breakers meet or exceed the latest IEEE/ANSI and IEC standards, including C2 and M2. They can be gang operated up to 245 kV, and Independent Pole Operation (IPO) is available at all voltage levels.
The DT Series from GE is characterized by advanced self-blast interrupters, leak resistant cast aluminum enclosures and durable low energy mechanisms. More than 120,000 circuit breakers with self-blast interrupters and spring-spring operated mechanism have been in service since 1989, including more than 30,000 dead tank circuit breakers.
The SF6 dead tank circuit breakers assure a high level of reliability on a daily basis, even under extreme conditions such as low temperatures, highly active seismic areas, regions with high pollution levels, and a corrosive atmosphere.
GE's Dead Tank Circuit Breakers, the DT Series, supports system voltages from 38 kV to 550 kV and are designed for reliable performance, maximized safety and lower cost of ownership. The DT Series is designed to operate within extreme environmental conditions including high elevation, very low and high temperatures (-60 °C to +60 °C ), seismic zones, polluted areas and corrosive atmospheres.
XD/GE Dead Tank Circuit Breakers
XD|GE offers a comprehensive range of Dead Tank Circuit Breakers that support a voltage rating up to 800 kV and are capable of carrying a continuous current up to 5000A. For circuit breakers rated 363kV and above, the design features a fully integrated, maintenance free, hydro-mechanical operating mechanism, maximizing device stability and long-term reliability.
Increased Availability, Enhanced Protection and Simplified Operations for Power Plants
GE's Generator Circuit Breakers (GCBs) are ideally suited for new and refurbished power plants from 50 MW to 1,500 MW and feature advanced technology with spring-spring-operated mechanisms. The comprehensive GCB portfolio provides solutions from generator circuit breakers without enclosure to customized solutions including disconnector, earthing switch, starting switch and instrument transformers.
Equipment for Power Plants from 50 to 200 MW
Equipment for Power Plants from 150 to 450 MW
Equipment for Power Plants from 450 to 1,000 MW
Equipment for Power Plants from 700 to 1,500 MW
HYpact is a hybrid compact switchgear assembly that typically consists of circuit breakers, disconnectors, and earthing switches located in a common gas tank. Current and voltage transformers can be added and the standard SF6 to air bushings can be replaced with cable connectors. Its modular design allows for a large variety of different layout configurations and enables a more economical substation design.
HYpact is well suited for heavily polluted environments and is the high-performing choice in regions exposed to seismic activity. Its compact design with low center-of-gravity is ideal for withstanding seismic acceleration, as proven by shaking table tests and finite elements method simulations. HYpact customers also benefit from long maintence-free periods with reduced exposure to environmental influences and a low number of bushings and moveable contacts.
Compact switchgear
GE’s Compact Air-Insulated Breaker Assembly (CABA) is a modular, compact switchgear system combining a live tank circuit breaker, double sided disconnect switch and other AIS equipment mounted on a common frame. It can be installed in greenfield substations or retrofit into an existing substation. CABA can be installed on existing foundations and is designed for space savings due to its compactness.
This flexible, compact breaker assembly is well suited for a variety of applications including transformer protection, line and cable switching, capacitor bank and back-to-back switching, reactor switching and circuit switching.
GE’s Digital Solutions for Circuit Breakers provide operators with the actionable intelligence and controls needed to ensure asset performance while reducing maintenance and operational costs. Through non-invasive sensors, these solutions provide active monitoring and control of key operational parameters and functions.
CBWatch Circuit Breaker Monitoring
CSD100 Point-on-Wave Controller