7.7.5. Indexes
The contractually specified tariffs define the energy and demand rates being used by the meter. However, in
many cases, active energy has more rates defined (for billing purposes) than reactive energy.
An index describes a combination of energy and demand rates that are activated simultaneously.
The meter index structure provides a mechanism to manage:
up to fifty different rate switching schemes for active and reactive energy
any overlapping rates for demand
the activation of any assigned control outputs
Note: The energy (page 36) and demand (page 39) channels must already be defined in the meter before
indexes can be configured and the required control outputs must be assigned to index use.
7.7.5.1. Index activation
Indexes can be activated as follows:
Immediately
The rate change is applied immediately as defined in the calendar day profile.
Delayed
The rate change is delayed until the end of any running demand calculation integration period (page 39).
Clock Loss
When a clock loss event is detected (backup power supply (page 30) sources exhausted), the meter will
switch to a pre-configured index with a low tariff rate to ensure the customer is not penalised during this
period.
7.7.6. Special days
The special days facility is intended to allow energy consumption charges on any locally-significant days, such as
religious or public holidays, to be different from the rest of the week in which they occur.
The meter can accommodate up to 100 entries in an internal special days list. Each entry can be either repetitive
or non-repetitive and have a different day profile (DP) applied.
Repetitive
These allow different day profiles to be applied on fixed dates during the year. The same dates will be used
for all subsequent years.
Non-repetitive
These allow a different day profile to be applied on a specific day. Each non-repetitive entry is completely
independent and when the last entry is reached it will be necessary to reprogram the meter with new values.
7.8. Backup power supply
To ensure the real-time clock and the cover opening detector are maintained during periods of power failure, the
meter is equipped with a backup power supply comprising:
Super-capacitor
An internal device specified to provide a minimum capacity of 1 day power outage carry-over period.
Lithium battery
An optional field-replaceable device, specified to provide a minimum capacity of 3 years continuous
operation at 25°C and a minimum shelf-life of 10 years, with less than 10% loss of capacity due to self-
discharge at 25°C.
To Next Page
Loading...
Need help?
General
