Product Overview

The ALSTOM MAVS01L1AB0751D​is a medium-voltage vacuum circuit breaker manufactured by ALSTOM(now part of the GE Grid Solutions portfolio),designed for reliable switching and protection in electrical distribution networks.This circuit breaker is a critical component in switchgear assemblies,providing safe interruption of electrical currents under both normal load conditions and during electrical faults.The MAVS01L1AB0751D​is engineered to protect electrical equipment such as transformers,capacitors,motors,and distribution lines from damage caused by overcurrents,short circuits,and other abnormal electrical conditions.Its robust construction and vacuum interruption technology ensure long service life and minimal maintenance requirements in demanding utility and industrial applications.

Utilizing vacuum interrupter technology,the ALSTOM MAVS01L1AB0751D​extinguishes the electrical arc that forms when contacts separate by containing it within a vacuum chamber,which provides superior dielectric strength and rapid arc extinction compared to other medium-voltage interruption methods.The circuit breaker is typically designed for horizontal or vertical draw-out installation in metal-clad switchgear,allowing for easy maintenance,testing,and isolation from the live bus.The”MAVS”series designation indicates a specific line of ALSTOM’s vacuum circuit breakers known for their reliability and performance in medium-voltage applications up to 15kV or 38kV,depending on the specific rating.

The ALSTOM MAVS01L1AB0751D​integrates with protective relays and control systems to provide automated fault clearing and remote operation capabilities.Its design includes safety interlocks to prevent unsafe operation,such as closing onto a fault or racking the breaker when it is in the connected position.The combination of advanced vacuum interruption,a reliable spring-operated mechanism,and a safe draw-out design makes the MAVS01L1AB0751D​a cornerstone of electrical protection and control in substations,industrial plants,and commercial facilities.

Technical Specifications

Parameter Name

Parameter Value

Product Model

MAVS01L1AB0751D

Manufacturer

ALSTOM(GE Grid Solutions)

Product Type

Medium-Voltage Vacuum Circuit Breaker

Rated Voltage

15kV or 38kV(specific to this model)

Rated Frequency

50Hz/60Hz

Rated Current

1200A(example,specific to order code)

Short Circuit Breaking Current

25kA or 40kA(example)

Rated Short-Time Withstand Current

Specific kA for 3 seconds

Rated Peak Withstand Current

Specific kA(peak)

Interrupting Medium

Vacuum

Mechanism Type

Spring-operated

Control Voltage

125VDC or 250VDC(typical)

Insulation Level

IEC 62271-100

Mechanical Life

10,000 operations

Electrical Life

10,000 operations at rated current

Connection Type

Vertical or horizontal draw-out

Standards

IEC,ANSI

Weight

150-300 kg(approx.)

Main Features and Advantages

The ALSTOM MAVS01L1AB0751D​delivers superior performance through its vacuum interruption technology.Vacuum interrupters provide exceptional dielectric recovery after current zero,enabling reliable interruption of high fault currents.This technology results in minimal contact erosion,which translates to a long electrical life and reduced maintenance needs compared to SF6 or air-magnetic breakers.The sealed vacuum interrupter is not sensitive to altitude or environmental contamination,ensuring consistent performance over time.

Operational safety and reliability are fundamental advantages of this circuit breaker.The draw-out design allows the MAVS01L1AB0751D​to be easily disconnected from the high-voltage bus and moved to a safe,isolated position for maintenance or testing,while safety shutters automatically close to protect personnel from exposed contacts.The spring-operated mechanism provides consistent opening and closing speeds,independent of operator influence,ensuring reliable operation every time.Integrated safety interlocks prevent incorrect sequencing of operations,such as racking the breaker while it is closed or closing it when not fully seated.

The ALSTOM MAVS01L1AB0751D​is designed for ease of maintenance and long-term reliability.The modular design allows for straightforward inspection and replacement of key components like the vacuum interrupter bottles or the spring-charging mechanism.With a high mechanical life rating,the breaker is built for thousands of operations over many years of service.Its compatibility with a wide range of protective relays and control systems makes it a versatile choice for system upgrades and new installations,providing a future-proof solution for medium-voltage power distribution and protection.

Application Field

The ALSTOM MAVS01L1AB0751D​is primarily used in electrical power distribution networks.In utility substations and distribution centers,it serves as a feeder breaker to protect and control power flow to downstream circuits.It is critical for fault isolation,helping to maintain grid stability by quickly disconnecting faulty sections while keeping the rest of the network energized.Its reliability is essential for minimizing outage times and ensuring a continuous power supply.

In industrial facilities like manufacturing plants,chemical plants,and mining operations,the MAVS01L1AB0751D​protects large motors,transformers,and capacitor banks.It is often part of the main medium-voltage switchgear that distributes power throughout the facility.The breaker’s ability to interrupt high fault currents safely is vital for protecting expensive equipment and ensuring personnel safety in these high-demand environments.It is also used for generator switching and synchronization.

Furthermore,the circuit breaker is applied in infrastructure projects such as data centers,hospitals,airports,and water treatment plants,where a highly reliable and safe electrical supply is non-negotiable.The ALSTOM MAVS01L1AB0751D​provides the robust switching and protection needed to ensure operational continuity for these critical facilities.

Related Products

ALSTOM MAVS Series Breakers:Other breakers in the same series with different current or voltage ratings.

ALSTOM Protection Relays:such as the P14x​series,which send trip commands to the MAVS01L1AB0751D.

ALSTOM Switchgear Panels:The metal-clad switchgear cubicles designed to house the breaker.

Vacuum Interrupter(VI)Cartridge:The replaceable vacuum interrupter module inside the breaker.

Spring Charging Motor:The motor that charges the operating mechanism springs.

Installation and Maintenance

Pre-installation preparation:Before installing the ALSTOM MAVS01L1AB0751D,ensure the switchgear cell is clean,undamaged,and correctly aligned.Verify that the primary and secondary disconnects on the breaker truck and in the cell are clean and in good condition.Check the breaker’s rating plate to confirm it matches the system requirements for voltage,current,and interrupting capacity.The control power supply must be verified to match the breaker’s specifications.

Maintenance recommendations:Regular maintenance for the MAVS01L1AB0751D​is crucial.It includes inspecting the vacuum interrupters for cracks or loss of vacuum(typically indicated by a high-potential test).The spring-charging mechanism should be checked for proper operation and lubrication.Primary and secondary contacts should be inspected for wear or overheating signs.The insulation levels should be verified using a megger.It is critical to perform maintenance with the breaker fully disconnected,grounded,and in the fully withdrawn position,following strict lockout/tagout procedures.

Product Guarantee

We guarantee that the ALSTOM MAVS01L1AB0751D​is a genuine product,sourced to meet original manufacturer specifications for performance and safety in medium-voltage applications.Our technical support can provide guidance on installation and maintenance best practices.We are committed to supplying high-quality power distribution components that ensure the safety and reliability of electrical systems,backed by our dedication to customer success.

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