Mechanical Interlocking for Transfer Switches
Description
The mechanical interlocking for transfer switches between MasterPacT MTZ devices prevents the interlocked devices from closing at the same time. The following interlocking functions are available:
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Interlocking between two devices
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Interlocking between three devices:
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Three incomers
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Two incomers and one coupling
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Two incomers and one replacement
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VBP Pushbutton Locking Accessory
The VBP pushbutton locking accessory provides redundancy in addition to the mechanical interlocking system.
The use of the pushbutton locking cover is mandatory on each interlocked MasterPacT MTZ device. The closing pushbuttons of the interlocked devices must be locked by padlocks sharing one key to help avoid simultaneous closing orders of interlocked devices.
For more information about the pushbutton locking cover, refer to VBP Pushbutton Locking Accessory
Mechanical Interlocking Between Two Devices
Mechanical Interlocking Between Three Incomers
Mechanical interlocking is between three main devices connected to different power sources.
Only one of the three devices can be in the closed position at a time. The other two devices are held in the locked open position.
For information on the accessory installation, consult the instruction sheet on the Schneider Electric website: NVE35498
Mechanical Interlocking Between Two Incomers and One Coupling
Mechanical interlocking is between two main devices connected to different power sources and one tie device.
Two of the three devices can be in the closed position at any time.
(1) Possible by forcing operation
For information on the accessory installation, consult the instruction sheet on the Schneider Electric website: NVE35500
Mechanical Interlocking Between Two Incomers and One Replacement
Mechanical interlocking is between two main devices connected to the same power source and a third device connected to a generator power source.
The generator device is locked open when either or both of the main devices are closed.
For information on the accessory installation, consult the instruction sheet on the Schneider Electric website: NVE35499
IVE Electrical Interlocking Unit
Electrical interlocking between MasterPacT MTZ devices can be done using the IVE electrical interlocking unit or by using dedicated wiring. The IVE unit is suitable for two devices only. For three devices, dedicated wiring is required to perform the electrical interlocking.
For information on the accessory installation, consult the instruction sheet on the Schneider Electric website: 51201201AA