21 Load control relay for external disconnect Page 103 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
21.3.3 Final State Situation
When the limiter is in the normal or emergency final state, the connection mode can be:
• “connected”
The load stays connected until the central system sends a disconnection command
• “ready for reconnection”:
The load is disconnected and stays in this state until the central system sends a
reconnection command or until it is reconnected manually.
21.3.4 Resetting Reclosing Process
The reclosing process shall be reset in the two following cases:
Case 1 (Before Ending Reclosing Process):
If the reclosing happened less than the number of allowed reclosings, but the next threshold
value crossing does not happen during a reset timeout (middle timeout), the reclosing
process is reset, counter is set to “0” and relay state moves to connected-state.
Case 2 (After Ending Reclosing Process):
If the limiter is in the final state, it reset after the final state timeout time (end timeout). The
counter is reset and the relay is moved back to “connected”. This applies for both final state
connection modes.
21.3.5 Monitored values
The monitored value for controlling the power can be one of following objects:
• Average Import Power (+A) (1-0:1.24.0.255);
• Average Net Power (|+A|-|-A|) (1-0:16.24.0.255);
• Average Total Power (|+A|+|-A|) (1-0:15.24.0.255);
21.3.6 Internal relay status Symbol on LCD
The internal relay can be in three states as “Connected”, “Ready for Reconnection” and
“Disconnected”. Each state is shown on meter’s LCD by a dedicated symbol.
Disconnected
Ready for connection Blinking symbols
Connected
The limiter can acts in normal or emergency modes. The combination of relay and danger
symbols is used to show the limiter situation on LCD. Below table shows the combinations:
Limiter, Normal Condition
Only relay symbol is blinking
Limiter, Emergency Condition
Both Symbols are blinking
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