FR2630218A1 - MOUNTING FOR AN ELECTRICITY METER WITH AUDIO-FREQUENCY CENTRALIZED REMOTE RECEIVER INTEGRATED INTO THE METER HOUSING - Google Patents

Abstract

For checking the counter Z and setting the pricing devices T ... to the prescribed positions, the bi-stable switching means R ... can be electrically excited by additional inputs K ..., P ..., and that, by applying a constant potential, the signal decoder and order comparator (DEC) device of the audio-frequency remote control receiver (TF) can be deactivated.

Description

i

  MOUNTING FOR AN ELECTRICITY METER WITH RECEIVER

  CENTRALIZED AUDIO-FREQUENCY REMOTE INTEGRATED INTO

COUNTER HOUSING

  The invention relates to an electricity meter comprising a centralized audio-frequency remote control receiver which is integrated in the meter housing and which acts on bistable switching means for the

  price change of the tariffcatcat devices.

  Such electricity meters are known, for example from German patent application 23 02 754 in which an electricity meter is combined with a centralized remote control receiver. This assembly is used for switching a double tariff meter and saves space compared to separate conventional assemblies. The centralized remote control receiver can

  then be mounted in any tariff meter.

  For such meters, it is imperative that at the time of installation of the device at the user's home, the relay controlling the double tarit meter be placed at

  the counting position that exists at this time.

  For this purpose, the relay must be accessible.

  This means that you must be able to open the counter to put it mechanically in the desired counting position. Before installing an electricity meter in the home, each meter must be officially certified. that is, it must be calibrated at the test center. In the case of a double tariff meter, the two meters must have recorded a predetermined consumption, in the case of a maximum meter, it is also the maximum and in the case of a double maximum meter, the two maxima which must be subjected to the control of exact registration. This verification takes place in known test centers which draw their energy from the network and which are also accessible by remote control. However, to have exact test results, you must have the guarantee that no rate change will take place during verification or that the rate change will not affect the meters to be checked. After such a verification, the meters are fitted with a so-called certification seal and are therefore no longer accessible. As part of the current miniaturization of the components, it is possible to install a centralized audio-frequency remote control receiver, endowed with the number of switching means, for example bistable miniature relays, necessary for the tariff circuits, on a modular unit inside the electricity meter. Accessibility to switching means is all the more difficult and is no longer even possible after the seal of certification. For electricity meters with a centralized audio-frequency remote control receiver, the object of the invention is to allow access to the switching means. apart from the possibility of audlo-frequency control, for verification and installation, even in the case of meters already fitted

a certification seal.

  This result is achieved according to the invention by the fact that for the verification of the meter and the setting of the pricing devices in the prescribed positions, it is possible to electrically excite the bi-stable switching means by additional inputs provided against any unauthorized intervention and that, by applying a constant potential, the signal decoder and order comparator device, serving as a control module for bi-stable switching means, of the audio remote control receiver can be disabled frequency. As additional control inputs, advantageously used according to the invention free or additional terminals of the electricity meter downstream of which are installed

  potential separation modules.

  According to a characteristic of the invention, the bi-stable switching means are tilted each time in the other position by short pulses, and in one position. initial defined, by a long pulse. In an advantageous embodiment of the invention, a logical combination, between the constant potential input and the signal input, controls the blocking of the signal decoder and order comparator device and switches the switching means in

a deflnle position.

  In another design of the invention, as an additional control input, a single optical receiver provided with conversion modules mounted downstream is connected to the activation lines of the switching means. In the electricity meter according to the invention, it is also possible to trigger in cyclic successions a process of verification and

  positioning by light pulses.

  In another embodiment of the lnventlon, instead of the additional control inputs, a keyboard or a control lever device is used

can be sealed.

  The invention is described in more detail below using a block diagram. In the diagram, only the elements necessary for understanding the invention have been shown. The realization of the meter drive systems and their connection circuits are generally known and have been

neglected for the sake of ciarte.

  For the electricity meter Z with integrated remote control receiver at integrated frequency-frequency TF, n bi-stable switching means (R1 ... Rn) are provided for the rate change of n meters with double or multiple rates or installation at maximum (Tl ... Tn). These switching means (Ri ... Rnl are controlled by signals by means of the energy distribution network, the control signals ES being applied to the intermediate of filters to a signal decoder and order comparator device ( DEC; This device (DEC) has the role of decoding the orders, of comparing them with the stored data and of transmitting the order, that is to say of putting the switching means associated therewith (Rl..Rn) at the desired position. The contacts (rl ... rn) of the switching means then control the amplifiers (\ V ..... Vn)

pricing (TI ... Tn> of the meter.

  To now be able to act on the pricing devices (T1 ... Tn) for testing purposes and to bring them to the exact position when installing a meter, the pricing device control lines (TI. ..Tn) are additionally applied to free or additional terminals (Ki ... Knj of the meter terminal box (Z) by potential separation modules (Pl ... Pn). The switching means ( Rl ... Rn) b and the pricing devices (TI ... Tn) are thus accessible by electric fly. As the terminal box is sealed after the installation of a meter, a

manipulation is not possible.

  -5 By applying a voltage pulse to one of the terminals (Kl ... Kn) which is converted into a lower voltage control pulse by means of the potential separation module (Pl ... Pn) associated with it, the corresponding switching means (RI ... Rn) are switched to the other position and, in parallel with this, the tariff of the pricing device (Ti ... Tn) which is there is changed connected. The state thus obtained is memorized by the switching means (Rl ... Rn) or are contacted (rl ... rn) until the pulse is sent

next command.

  To prevent any rate change of the pricing devices (TI ... Tn) by the centralized control pulses of the energy distribution network during a meter calibration test (Z), upstream of the signal decoder device and order comparator (DEC) is, for example, mounted an inhibitory combination at the non-inverting input to which the control signals (S) of the centralized remote control are applied and whose inverting input is applied to another free terminal (Kn + l). During the verification of a counter, a constant potential is applied to this terminal (Kn + l) making it practically

  insensitive to the centralized remote control receiver (TF).

  As switching means (Ri ... Rn), relays with bi-stable cards are preferably used. When the network voltage pulses arrive at the terminals (Ki ... Kn), the relays (Rl ... Rn) each time occupy the other switching position. that is, their contacts (rl ... rn) are open or closed. When the pulse length is considerably increased so that a potential is applied to the relays (RI ... Rn) for a duration of, for example, more than 5 sec., These switch to a defined initial position, who

  is for example characterized by open contacts (rl.

  rn). These two functions of controlling the relays by different lengths of pulses allow positioning, by short pulses, of the pricing devices (Tl ... Tn) when the meter is installed at the user's home, and , by the application of longer pulses as well as a constant potential at the level of the centralized remote control receiver (TF), a conventional type verification of

  counters in well-known training centers.

  The position each time occupied by the relays (Rl ... Rn) or the pricing devices (Tl ... Tn)

  is displayed by light-emitting diodes.

  Instead of using additional or free terminals from the terminal box, it is also possible to carry out optical control by means of light pulses. In such a case, preferably only one optical receiver is combined with the relays (Rl ... Rn) by corresponding conversion modules, a positioning and verification process being controlled in cyclic successions for the different pricing (Tl ... Tn). The passage to the different relays can here be controlled by a more or less long pulse and the relays can be toggled in the different

positions by coding.

  A sealed valve or coding based on an exchange of data between the comparative order memory or another device memory (DEC) and a light emitter,

  prevents deliberate manipulation.

  Instead of sending the control wires out via terminals, it is also possible to use a keyboard or a control lever device which, like the aforementioned criteria, guarantees electrical access to the switching means controlling the pricing devices (Tl ... Tn). Such a keyboard or control lever device is then protected against any possibility of unauthorized intervention by a cover.

likely to be sealed.

Claims (7)

  1. Installation for an electricity meter   including a centralized audio remote control receiver   frequency which is integrated in the housing of the meter and which acts on bi-stable switching means for changing the tariff of the pricing devices, characterized in that for the verification of the meter (Z) and the setting of the pricing (T ...) at the prescribed positions. we have- the possibility   electrically energize the two-way switching means   stable (R ...) by additional inputs (K ... P ...) guaranteed against any unauthorized intervention, and that by applying a constant potential, the signal decoder device can be disabled and order comparator (DEC), serving as a control module for bi-stable switching means (R ...),   of the audio-frequency (TF) remote control receiver.   2. Installation according to claim 1, characterized in that as additional control inputs, free or additional terminals (K ...) of the electricity meter (Z) are used downstream of which are   installed potential separation modules (P ...).   3. Assembly according to claim 1, characterized in that the bi-stable switching means (R ...) are tilted each time in the other position by short pulses and in a position   initial defined by a long pulse.   4. Assembly according to claim 1 ,. characterized by the fact that a logical combination, between the constant potential input (Kn + l) and the signal input (S), controls the blocking of the signal decoder and order comparator device (DEC) and makes toggle the means of   switching (R ...) in a defined position.   5. Assembly according to claims 1 and 2,   characterized by the fact that as an additional control input, a single receiver is connected to the switching lines of the switching means (R ...)   optics with downstream conversion modules.   6. Assembly according to claim 5, characterized in that a cyclic succession and verification process is triggered by light pulses.   7. Installation according to claim 1, characterized in that instead of the additional control inputs (K ..., P ...), a keyboard or a   control lever device that can be sealed.