WD120 single phase energy meter.

WD**0 single phase energy meter.
Residential application.
Customization Service available.
ISO, KEMA, MID, STS certified. 

Measuring and registration
Meter can be programmed through communicating port, allows reverse energy to be added on import energy volume, recorded separately, or simply ignored

Legible LCD Display
The meter is equipped with a large LCD
- Automatic scroll mode
- Manual scroll programmable data set and sequence
- Display available without main power (Option)
- LCD back-light (Option) 

Real Time Clock
The time clock used by the meter synchronized by a quartz crystal clocking unit with an accuracy of+/- 5ppm at *5°C.

Flexible Tariff Management
Benefit from an internal RTC, full Time of Use (TOU) function is realized.
A tariff program, season changeover, transition to day light saving period and vice-versa are managed by the RTC which suitable for the most complex metering

The meter is able to generate “End of Period” information as defined by the user, usually based around billing dates.
The meter is able to save register information for up to twelve billing periods. This removes the need to visit the meter on a frequent basis.

The tariff management facility is able to support up to four seasons and weekday /weekend tariffication possibilities. It is also possible to define which days are allocated weekend tariffs. In addition the meter also has provision for up to twelve Special Days for which alternative rate switching patterns can be defined. For each of the day types up to eight switching times can be programmed. The days used for weekends can be programmed to allow for local needs. The tariff facility is able to manage changes in time to accommodate Daylight Savings hour changes according to a look up table that can be programmed with up to twenty five years’ of adjustment information.

Maximum Demand information can also be measured for all tariff rates allowing optimum billing of high consumption customers in particular.

Maximum Demand
The meter calculates and displays Maximum Demand data for each tariff register. The Maximum Demand window is configurable thru software as 1,5,*5 minutes interval.  Maximum Demand is displayed in kW and can be reset to zero automatically or manually.

Display

The meter is equipped with a large LCD
-  Automatic scroll mode
   Programmable interval
   and sequence
-  Manual scroll
   programmable data set
   and sequence
-  Display available without
   main power (Option)
-  LCD back-light (Option)

The display is also used to indicate items such as Active Rate, Rate Number etc. using icons that are not language specific. Indications

Anti-tampering feature (optional)

Benefit from modern technology and  advanced design, the meter can optionally equipped with abundant temper-proof function which can be displayed on LCD and recorded in memory with time and date stamp, such as

Meter cover & terminal cover open
Energy reverse
External magnetic affection
Bypass
Earth fault

Communications

Equipped with an optical port in accordance with the protocol defined by IEC *******1, the meter can be programmed in the workshop or in the field under security control. 

The port is also enabled for meter reading in accordance with the same standard. The port is secured under password and encryption control, to prevent unauthorized access.

Protected by different security level, the various configuration can be made, such as:
Adjustment of real time clock
Tariff programming
Resetting of Maximum Demand and historic registers.
Meter rate registers reset to zero

The programming tool can be configured on a User by User basis to allow or deny an operator access to any or all of the functions described above.

Besides, the meter can be configured to one way communication to download meter reading data without any security protection.

The operator ID, time and date stamp of last configuration will be recorded as event in meter memory.