SPLIT PREPAID METERS IN A BS HOUSING USING PLC TECHNOLOGY, MAKING INSTALLATION EASY AND COST-
The Cashpower Gemini PLC prepaid meters are compact, single-
Full Description of this Prepaid Meter
The Cashpower Gemini PLC meter is a compact, single-
Split Metering Functionality
The split prepayment meter consists of two parts, the meter and the customer interface unit.
Communication between the meter and the customer interface unit is by means of Power Line Carrier communication, using existing household wiring. No additional communication wires are required.
The customer interface unit is a compact unit with a user-
The prepayment meter contains all critical metering, number decryption and load control functionality. It operates independently and is immune to any form of tampering on the customer interface unit.
The meter is usually installed in a secure, locked enclosure, typically a pavement kiosk or pole-
Principle of operation
A key feature of the Cashpower Gemini PLC split prepayment meter is the ability to use standard household wiring for communication between the customer interface unit and the prepayment meter. This capability enhances retrofitting or replacement of conventional meters with prepayment meters in apartment blocks and housing estates.
The benefits include lower cost of installation as no new cabling needs to be laid, and speed of installation. The keypad or customer interface unit is simply plugged into any existing mains outlet and after a simple commissioning procedure, the unit communicates with the remote meter up to a distance of typically 200 metres.
The maximum communication distance is dependent upon network attenuation and interference.
The customer interface is connected by a power cord to an existing mains outlet in the household. Under normal conditions, when there is sufficient credit in the meter, the customer interface unit operates directly from mains voltage. However, in the event that the meter credit expires and the meter disconnects power to the house, the customer interface unit is fitted with two standard AA Alkaline batteries to allow the customer to re-
The customer interface has a large backlit display with configurable functionality. The customer or field technician can access meter parameters by entering specific register information using the keypad.
In addition, the customer interface unit has audible low credit warning tones that can be silenced with a key press.
Meter status and diagnostic indicator
The meter includes a LED status indicator. This allows a technician to view the operational status of the meter without the need for specialised interrogation tools or having to gain access to the consumer’s premises. Information such as tamper status, power limiting, commissioned status and credit status are available.
LCD display on the meter
The Cashpower Gemini PLC meter model is fitted with a large clear display to enable field staff to read the meter parameters in a secure kiosk. This meter can be configured at the time of manufacture to show total kilowatt-
More detailed information and programming is achieved via the standard interrogation port at the rear of the meter. This is an optional model at request.
The Gemini PLC meter has an IEC 62056-
The split configuration of Gemini PLC meters significantly reduces the risk of tampering, especially considering that the meter is installed in a remote, secure location. The meter is also mechanically sealed against tampering through the use of a factory-
In addition, the meter is equipped with a tamper sensor that will automatically disconnect the power to the load in the event of tampering.
The meter also has a feature allowing detection of Significant Reverse Energy. If the line and load wires are swapped during installation, the meter will continue to operate and decrement credit but can be factory programmed to tamper and disconnect the load should Significant Reverse Energy be detected.
The meter is capable of “upstream” communication to a concentrator at a kiosk, low-
Communications capability can be implemented in two ways. A concentrator supplied by either Landis+Gyr or a third party, can be fitted into the secure enclosure to provide connectivity via wireless technology to a power utility’s back office. As with all Cashpower split prepayment meters, the Gemini PLC has an optical communications port and each meter in the enclosure is connected to the concentrator via an optical port reading device.
By means of the concentrator and the optical communication port, bi-
Prepayment / Credit feature
These include the anti-
The meter incorporates comprehensive, 30kA lightning surge protection.
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