User's Manual

52 Meter Operation
Emergency credit can be used with either standard prepay mode or Prepay
Maximum Power mode. If used with Prepay Maximum Power mode, either
exhaustion of emergency credit or exceeding the maximum power threshold will
cause the load disconnect to be turned off.
Audible Low Prepay Credit Alarm
The audible meter alarm can be configured to activate on a low or exhausted prepay
credit level. The level of activation is configurable. You can turn the alarm off by
pushing the button on the front of the meter. Once the audible alarm is turned on, it
stays on until the button is pressed or until prepay credit is added above the alarm
threshold. An event can be logged when the user acknowledges the alarm by
pressing the button.
Meter Settings for Prepay
The values entered into the meter for prepay are in watt-hours (Wh). When there is
just one tariff, T1 (“Prepay tariff rate 1” in the Provisioning Tool) should be set to
1,000 Wh per kWh. (The currency rate is whatever the utility charges per kWh, and
that value is not entered into the provisioning program or meter.)
When there are additional prepay tariffs, the 1,000 Wh per kWh becomes the
baseline and other tariff settings are a ratio of the baseline. The lowest value should
always go into T1. Here’s an example with all four tariffs used:
Tariff Example Currency Rate, per kWh Equivalent Setting in Meter - Wh per kWh
T1
0.09 750
T2
0.12 1,000 (this is the baseline amount)
T3
0.15 1,250
T4
0.18 1,500
Maximum Power Disconnect
The trip point of the load disconnect for excessive power use is programmable, and is
based on a maximum active power value threshold and time duration that is utility
configurable. After an excessive power condition trips the load disconnect, the
consumer can manually reset it. If the trip point is still exceeded after manual re-
latching, the load disconnect will shut off again within less than a minute.
This feature is intended primarily to limit consumer power usage, and is not to be
used as the system safety over-current protection. This feature can be enabled or
disabled. If both the regular Maximum Power and Maximum Power when Prepay
Credit is Exhausted are active, either condition will turn off the disconnect contactor.
Warning: The load disconnect contactor does not have thermal overload or
over-current protection. External fuses or a circuit breaker must be provided
to protect the premises wiring system.
Primary and Secondary Maximum Power Level
Thresholds
The meter contains both a Primary Power Level Threshold and a Secondary Power
Level Threshold value. The meter can be programmed to use either value to
determine when the load disconnect reaches its trip point. This value is the active
!