The APT Manual Transfer Switchgear (MTS) is a medium voltage product used to switch power from a normal source to an emergency source utilizing operator initiated manual transfer.
System Ratings:
– Voltage: 2.4kV-38kV (3Ø)
– Current: 200A-1200A (3Ø)
*Available as Front Access Only
– Silver plated copper bus
– Optional 12” Cable Pull Section
Manual Transfer (Open Transition) Operation:
– Manual transfer switch interlocking system allows only one power source to be connected to the load bus.
– Mechanical key interlocking prevents closing of each source switch unless the 2nd source
switch is open (disconnected) position
Power Source Manual Transfer Switching Device:
– Two Interlocked Switches (one normal source switch and one backup source switch) with optional Source Connected Indicating Lights
APT Open or Closed Transition Automatic Transfer Switchgear Applications:
– One Utility Source & One Generator Source
– Two Utility Sources
– Two Generator Sources
Main Bus:
– Steel Enclosed Compartmentalized
– 1200A, 2000A, 3000A
– Durable Industrial Vinyl Mimic Bus
Infrared (IR) Viewing Windows
Symmetrical Interrupting Capacity:
– 2.4kV-15kv
– 12kA, 25kA, 31.5kA, 40kA, 50kA
2.4kV-15kV Ultra-compact ATS with optional configurations:
– 3-way transfer
– Load Feeders
– Tie circuit breakers
– 3-way transfer
– Load Feeders
– Tie circuit breakers
We are committed to providing expert support and tailored power solutions. Contact our team today to find the right answers for your needs.
2.4kV - 38kV Air Insulated Manual Transfer Switchgear
SF6-free, two-source manual transfer switchgear designed for open-transition operation, visible isolation, and mechanical key interlocking that prevents inadvertent source paralleling.
The MES-MT is medium-voltage, air-insulated manual transfer switchgear designed to transfer a common load between two power sources
Two interlocked load-break switches provide open-transition transfer, allowing only one source to be connected to the load bus at a time.
Mechanical Kirk Key interlocking helps prevent inadvertent source paralleling, while optional fuses can provide integral overcurrent protection.
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Final configuration may vary by project requirements.
Transfers the load between two sources without paralleling them.
Kirk Key interlocking helps prevent inadvertent source paralleling.
Viewing windows provide a clear view of all three switch blades.
Optional fuse protection provides integral overcurrent protection when required.
The MES-MT uses two mechanically interlocked load-break switches, one for the normal source and one for the alternate source.
During transfer, the connected source is opened before the alternate source can be closed, maintaining open-transition operation and preventing source paralleling.
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Not sure which voltage, switch rating, source arrangement, or protection configuration your application requires? Our sales team can help you select the right MES-MT Manual Transfer Switchgear for your project.
Common two-source, open-transition manual transfer applications for the MES-MT.
Manual open-transition transfer between a utility source and generator source.
Manual open-transition transfer between two utility sources.
Manual open-transition transfer between two generator sources.
Transfer configurations can include integral fused output overcurrent protection.
Source arrangement and overcurrent protection are selected based on system requirements.
MES-MT is medium-voltage, air-insulated manual transfer switchgear designed to transfer a common load between two power sources.
MES-MT uses two interlocked source switches for open-transition transfer. The connected source must be opened before the alternate source can be connected to the load bus.
Mechanical Kirk Key interlocking prevents either source switch from being closed unless the other source switch is in the open, disconnected position.
Typical configurations include Utility + Generator, Utility + Utility, and Generator + Generator source arrangements.
Yes. MES-MT can be configured with optional current-limiting fuses rated from 50A to 1200A, or with overcurrent protection provided elsewhere in the system.
Yes. Each load-break switch section includes a Lexan viewing window that provides a clear view of all three switch blades.
Our team can help review system voltage, switch rating, source arrangement, enclosure requirements, and overcurrent protection for your application.
Contact our sales team to discuss your sources and determine the right MES-MT configuration for your system.
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