21 Load control relay for external disconnect Page 99 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
21 Load control relay for external disconnect
In case the CT or CT/VT meter should control an external disconnector the internal 10A load
control relay of the meter can be used in 3 different ways.
• Remote Control (via communication)
• Manual (using e.g. a push button)
• Locally (using the load limitation function)
Below 3 states are defined for the internal relay or disconnector (see DLMS blue book):
• Disconnected
• Ready for Reconnection
• Connected
Figure 174 State diagram of the load control relay / disconnector relay
As has been shown in Figure 24, the possible transitions have been specified by letters ("a" to
"h"). The different "Control Mode" can be defined based on possible/permissible transitions
between states.
Remark: For manipulation reasons the status of the relay is retriggered once every 60s
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