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Meter Operation
The LCD will display the following during the two conditions:
Figure 5: LCD Showing "Power Limit Trip" - Disconnection for a 30 second period
Figure 6: LCD Showing "Power Limit Lockout" - Disconnection for a 30 minute period
4.7
Automatic/Manual Load Reconnection
In some instances, local safety regulations require that the meter not automatically re-close the latching relay
after, for example, a power limit trip. Under these conditions, the latching relay will remain in the open state until
such time as a key is pressed on the keypad.
Using the example of a power limit trip, the latching relay will open and remain open for a period of 30 seconds.
At the end of this 30-second period, the display will return to normal but, instead of the latching relay closing, the
latching relay status icon on the LCD will start to flash, toggling between an open and closed state. This is a
visual indication that the latching relay may now be manually closed, by pressing any key on the keypad.
In the event of the latching relay opening due to expiry of credit, it will only be able to close again on entry of a
valid credit token.
The manual action of entering a credit token via the keypad, results in the latching relay closing when the last
digit of the token is entered and accepted by the meter.
Automatic/manual load reconnection is a configurable option, set at the time of manufacture. It may also be
changed at any stage with a suitable engineering token.
4.8
Disconnect on Power Failure
This option, configurable at the time of manufacture, forces the meter‟s latching relay to open whenever there is
a power failure. The option can be invoked as a means of preventing the meter from being installed fraudulently
with line and load connections reversed, in which case the meter will never power up once the latching relay is
open.
Cashpower Gem Lite – User Guide
Review
Power Limit is not a form of safety overload protection. It is designed to
generally limit the overall usage of power in a particular area (possibly
dictated by reticulation limitations or linked to a tariff allocation).
When the latching relay open & closed status icons on the LCD start to
flash alternately, this is a visual indication that the latching relay may be
manually closed by pressing any key on the keypad.
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© Landis+Gyr (Pty) Ltd
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