Figure 13: Liberty 100 Accounting Zones In Prepayment Mode - Secure Liberty 100 Technical Reference Manual

In Prepayment mode the meter maintains two internal accounts: the main account and the Emergency Credit
account. Standing charges are deducted each day or as configured in the meter.
Each time the meter account passes through a credit zone threshold it sends an alert to the HAN and/or HES
(depending on the configured rule), and generates a visual and audible alert for the user subject to the alarm
suppression restrictions detailed in the Friendly Credit Section 5.5.3.
'Low Credit' threshold and 'Low Emergency Credit' threshold values can be configured remotely for Liberty 100
meters.
In Prepayment mode the meter will provide the following information on Emergency Credit:
a) When Emergency Credit is available for selection
b) When Emergency Credit is in use
c) When Emergency Credit has been fully used
d) The minimum amount of credit needed to restore the supply and repay the used Emergency Credit
amount.
5.5.4.1 Credit Zone
In the Credit Zone the value of the meters account, after a reduction, is checked against the meter's Low Credit
threshold. No action is taken if the value is above the threshold. When the value passes below the threshold the
meter sends an alert to the IHD and generates a local visual and audible alert to the user subject to restrictions
that apply in alarm suppression period as detailed in the Friendly Credit Section 5.5.3.
5.5.4.2 Low Credit Zone
In the Low Credit Zone the value of the meter account, after a reduction, is checked against the meter's cut-off
threshold. No action is taken if the value is above the cut-off threshold. In this zone Emergency Credit is made
available to the User before the value reaches the cut-off threshold. A visual indicator on the meter's display as
well as on the IHD indicates that Emergency Credit is available. While the meter is operating in this zone, if
Emergency Credit is made available, the user can enable it by pressing key 'A' on the meter's keypad or from
the IHD to prevent supply disconnection.
When the value reaches the cut-off threshold, the meter sends an alert to the IHD and generates a local visual
and audible alert to the user subject to restrictions that apply in alarm suppression period as detailed in the
Friendly Credit Section of this manual.
Page 32 of 116

Figure 13: Liberty 100 Accounting zones in Prepayment mode

Liberty 100 Smart Electricity Meter Technical Reference Manual BGX501-767-R02