Eaton's Cutler-Hammer MVS Load Interrupter Switchgear is an integrated assembly of switches, bus and fuses, which are coordinated electrically and mechanically for medium voltage circuit protection.
The Load Interrupter (Type MVS) metal-enclosed switchgear provides safe, reliable switching and fault protection for medium voltage circuits rated from 2.4 kV through 38 kV. The MVS switch is ideal for applications in a lower duty cycle operation environment, while providing a cost-effective option offering the characteristics vital to safety and coordination. The MVS switch's quick-make, quick-break mechanism provides full-load current interrupting capability, while fuses provide accurate, permanently calibrated, short circuit detecting and interrupting capabilities. Visibility of actual blade position improves safety by providing positive assurance of circuit de-energization.
Mini-MVS
The Mini-MVS switchgear assembly is a space-optimized 26" wide design rated at 200 amperes available at 5 kV. The medium voltage Mini-MVS switchgear assembly is for use in power distribution, transformer primary connections and isolation applications requiring a stand-alone assembly, cable in/cable out terminations and manual operation. The switch comes standard with built-in interlocks and safety features and is available fused or non-fused, with an option for an outdoor enclosure.
Duplex Switch Configuration
Two MVS load interrupter switch sections can be utilized to provide cost-effective source selectivity with a common load side bus feeding one load, fused or non-fused. Key interlocks are a standard feature provided to permit only one switch to be closed at one time and prevent opening any switch door unless both switches are open.
Two-Position, No-Load Selector Switch
Eaton's Cutler-Hammer MVS load interrupter switch can be utilized to provide the most cost-effective source selectivity in a single compact structure with a two-position non-load break selector switch in series with the load break MVS switch. This selector switch is mechanically interlocked such that operation can be performed only when the load interrupter switch is in the open position. Also, neither the MVS switch nor the main door can be closed without the selector switch being positively locked in one of the two feeder positions.
Motor Operated MVS Switches
Eaton's Cutler-Hammer MVS Pow-R-Drive E motor operator provides the safety, convenience, and coordination inherent in remote switch operation. A MVS Pow-R-Drive motor operated switch is a standard, manually operated switch in combination with a heavy-duty electric motor-driven linear actuator that charges the spring. The linear actuator is located in a separate isolated low voltage compartment. During electrical operation, it smoothly and quietly extends or retracts the proper distance to cause the switch mechanism to operate. Standard motor operators are mounted in the switch enclosure, eliminating a separate motor compartment.
Automatic Transfer Control
Eaton's Cutler-Hammer MVS switchgear with an automatic transfer control system is an integrated assembly of motor operated MVS switches, sensing devices and control components available from 5 to38 kV. It is typically applied where the continuity of service for critical loads from two power sources in either a two-switch (one load) or three-switch (two loads) configuration is desired. MVS switchgear with an automatic transfer control system can meet most automatic throw-over requirements with the wide variety of operational sequences embodied in one standard automatic transfer control system.
IQ Transfer Control
The IQ Transfer is equipped to display history information either via the front panel or over PowerNet. Source 1 and Source 2 Run Time, Available Time and Connect Time are available, as well as Load Energized Time, Number of Transfers, and the Date, Time and Reason for the Last 16 Transfers. For communications capability, the IQ Transfer can be equipped with a PONI card allowing users to communicate with the unit via Eaton's PowerNet software.
Electronic Metering and Communications
MVS switchgear assemblies can be equipped with the Eaton's Cutler-Hammer family of IQ Electronic Meters to monitor a power circuit's electrical quantities within the capabilities of each device. MVS switchgear assemblies can also be equipped to interface with the PowerNet integrated monitoring and control communications system with PONI accessories, and Addressable Relays.
MVS switchgear meets or exceeds the following industry standards:
- ANSI/IEEE C37.20.3, ANSI/IEEE C37.20.4, ANSI C37.22, ANSI C37.57, ANSI C37.58, NEMA SG5, NEMA SG6, CSA T22.2 No. 31-M89, EEMAC G8-3.3.
- MVS switchgear assemblies are available as listed products with Underwriters Laboratories and Canadian Standards Association for most options
- MVS switchgear assemblies are available seismically labeled to meet the seismic Zone 4 requirements of the UBC (Uniform Building Code), CBC (California Building Code), BOCA (Building Officials and Code Administrators, International) and IBC (2000 International Building Code).
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