SGM3000 Series Smart Meters
User Manual
50
GEH-7111-1.00-2
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Arming Time Out Period
The SGM3000 Series meters support configuration of an automatic time out period for an
armed meter for safety reasons. When a meter is armed, if the main supply relay has not been
connected before the time out period elapses, the main relay will stay open and the meter will
be disarmed.
Attempting to Remotely Reconnect an Armed Meter
The SGM3000 Series meters do not support remote connection of an armed meter.
The meter must be disarmed before supply can be reconnected locally via MeterMate or
remotely via the AMI interface.
Armed State After Power Outage
The SGM3000 Series meters support entry of an armed state after a power outage setting. The
meter supports
configuration of the “always disarm” option.
If the always disarm option is
selected, the meter will always default to the disarmed state after a power outage. The meter
also supports
configuration of the “as before” option. If the as before option is selected, the
meter will be armed after a power outage only if the meter was in the armed state before the
power outage.
Auto-Disconnect After Remote Reconnection
The SGM3000 Series meters have the capability to automatically disconnect after a remote
reconnection if there is excessive load detected flowing through the meter. The meter can
enable and disable the remote disconnection functionality.
When the functionality is enabled and service is reconnected remotely, the meter will monitor
the load against 3 parameters. If the load threshold (X) is exceeded for the load threshold
period (Y) at any time within the automatic disconnect period (Z) since the remote
reconnection of supply, the meter will disconnect the service.
4.6 Real Time Clock
All SGM3000 Series meters have an internal clock mechanism to maintain the date and time.
The functionality includes specification of the time reference, formats for display of time, and
provision for local time zone and daylight savings entry. All configuration options for the
internal clock will be configurable locally via MeterMate and remotely via the AMI interface.
There are two time base options: line frequency based time and crystal oscillator based time.
Note:
Time accuracy will not be affected by high or low voltage operation, regardless of
whether the time is being maintained by line frequency or crystal.
The line frequency based clock mechanism will be the default selection. The line frequency
based clock mechanism will operate when the line frequency is 50 Hz or 60 Hz.
