Ethernet Connection:
This connection links a PC used for control with the MTO300.
NOTE: port is not network compatible. DO NOT USE ON A LOCAL AREA NETWORK. The system was designed for peer
to peer operation.
Earth/Ground Lug:
This connection is used to connect a transformer under test to earth ground for safety. The transformer and the MTO
shall be at the power ground/earth potential when being operated.
Emergency Shut Down Switch:
This switch, when pushed will disable the source power supply and automatically discharge the transformer. The
instrument is continuously monitoring this switch in the event of an emergency. If the switch is engaged, no testing can
commence.
Remote Control Switch (MTO300 ONLY)
This connector is used to interface with a remote switch. This switch is primarily used when testing On-Load Taps of a
transformer
The Remote Control Switch can remotely start the MTO test and store multiple resistances reading for tap changes. The
storage function in remote mode is sequential and occurs during a continuous resistance test.
www.megger.com
MTO3XXX-UG-EN Rev 1 Feb 2018
9
Product overview 300/330A
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