CIRCUIT BREAKERS
Live Tank Circuit Breakers up to 800 kV
qúatro-grid® 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 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 Live Tank Circuit Breaker range includes breakers using single or double motion technology and reduced chamber size. Both, porcelain and composite insulators are available.
Dead Tank Circuit Breakers
qúatro-grid 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.
qúatro-grid'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 qúatro-grid breakers 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, 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.
HVDC Switches
qúatro-grid switche's 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.
- DC current switching
- Dielectric withstand in open position over long time intervals
- High creepage distances require a long column
Generator Circuit Breakers
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 qúatro-grid GCB portfolio provides solutions from generator circuit breakers without enclosure to customized solutions including disconnector, earthing switch, starting switch and instrument transformers.
- Spring-spring operated mechanism for utmost reliability
- Optimized, preventive maintenance with monitoring system
- Breaker natural cooling up to 30,000 A and enhanced cooling up to 40,000 A
- Optimized digital smart cooling solution optimizing ventilation system in real time
Hybrid compact switchgear
qúatro-grid solution 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.
qúatro-grid solution 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. qúatro-grid customers also benefit from long maintence-free periods with reduced exposure to environmental influences and a low number of bushings and moveable contacts.
Compact-Moduler Switchgear
qúatro-grid’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.
Circuit Breaker Digital Solutions-Software
qúatro-grid’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.
- Compact and modular online monitoring solution for high voltage circuit breakers
- Improves operational availability with health and condition-based monitoring of key performance parameters
- Able to detect even small SF6 leaks to optimize gas refill operations
