BRPI1100222A2 - CABINET FOR INSTALLATION OF CENTRALIZED ELECTRIC POWER METERS - Google Patents

Abstract

"CENTRAL MEASURING ELECTRIC POWER METER INSTALLATION OFFICE" Cabinet for the installation of centralized measuring electric meters, comprising a cube-shaped box (2) with rounded corners and having a flat edge at the end (3); front cover (4) to be received at the flat edge (3) of the housing (2) with safety lock (5) and secured by upper hinges (6); double securing strap (8) on the rear portion of the enclosure housing (2) (1) for securing the enclosure (1) to the post or an eventual external structure; mounting devices (12) for installing the power meters (9) and cabinet monitor (10) internal lock (11) for protection against improper removal of the power meters (9) and cabinet monitor (10) ; optical bus (13) and optical leds (14) to identify each electric power meter (9) properly installed in the cabinet (1); cable entry (7) for the input terminal block (17) which has locking cover (18) (19) and cable outlet (20) of cabinet 1; phase knives (15) and neutral knives (16).

Description

OFFICE FOR INSTALLATION OF ELECTRIC POWER METERS

FOR CENTRALIZED MEASUREMENT

The present invention relates to electronic power meters and, in particular, to a meter installation cabinet for centralized power measurement, the function of which is to house the meters without, however, interfering with the metrological issue. at the same time contribute to the management of the installed meter park in the field and its physical integrity.

BACKGROUND OF THE INVENTION

Electronic power meters are a reality and are already known in the state of the art. Meters are applied individually to each consumer unit of an electricity distributor.

In situations where there is a high concentration of consumer units, distributors may choose to install the meters in panels or cabinets and, from these, derive the extensions that will feed each consumer unit. This is called Centralized Measurement.

Centralized Measurement can be used in a wide range of situations, such as Building Measurement (measurement of apartments or units in a building), Commercial Complex Measurement or Residential Centralized Measurement, where several homes are fed to from a distribution cabinet affixed to the post outside the home having meters installed internally to this cabinet.

In the state of the art, manufacturers of Centralized Measurement products have taken advantage of the fact that multiple meters are installed in the same enclosure to include functions such as data concentration in the enclosure. In general, these manufacturers have chosen to build simpler power meters, leaving the remote data transmission functions as well as the data transmission from each meter to the consumer's remote display to be left to electronic equipment installed in the cabinet. For this reason, these cabinets are referred to by these manufacturers as "concentrators". By leaving the office to data concentration and distribution,

In the eyes of the Metrological Authority (in Brazil, INMETRO), these offices play a role that interferes with the aspects of legal metrology, so that the functioning of the meters should always be measured systemically, considering not only the meters. itself, but also the function of the cabinets, whose function of concentrating data for sending to remote displays and remote electronic processing systems at the distributor.

SP # 7288522 vl In the prior art there are already known cabinets for electric meters specifically targeting a type of electric meter project.

Document PI 0804790-1, filed on 11/03/2008, published on 27/02/2010, entitled "Improvement in Energy Meter Cabinet", deals with an improvement in an electric meter cabinet comprising a base ( 10) having at the edge the arrangement of serrated structures (11), said base (10) having at the front face an area of discontinuity of the serrated structures (11), said area being arranged with tabs (2) including a central niche ( 13), and a lid (20) having at its lower edge the arrangement of serrated structures (21) aligned horizontally with the serrated structure (11) disposed at the base (10), said front face cap (20) having an area of discontinuity of the serrated structures (21), in which area the tabs (22) are arranged coinciding with the position of the tabs (12) disposed in the base (10), and a through hole niche (23), said niche (23) aligned with the niche (13) disposed in the base (10).

Document PI 0703743-0, filed on 10/22/2007, published on 22/12/2009,

entitled "Electricity Meter Enclosure" is an electricity meter enclosure comprising a base (10) provided with a lid (20) and a terminal block (30) including a lower extension (30) of the base provided with a second lid (40), said terminal block (30) having an outer face with circular openings (31), with the lid (20) having at its edges fixing points with centering pins (21) provided with longitudinal ribs (211), said centering pins (21) engaging in niches (11) arranged symmetrically on the base (10) of the meter, the second cap (40) having on the surface a structure including parallel arranged fins (41), said fins (41 ) provided with a through hole, with terminal block provided with handles (31) symmetrical to the fins of the second cover (40) where a seal is pierced, and the inner region of the base (10) having, in the boundary region between the base (10 ) and the terminal block (30), a shield (12) for terminal rotation.

Document PI 0604127-2, filed on 09/25/2006, published on 13/05/2008, entitled "Constructive Arrangement in Electricity Meter Cabinet", deals with a constructive arrangement in an Electricity Meter Cabinet which presents a bottom extension (30) of the base suitable for the arrangement of the current conductors, keeping them insulated from the electronics disposed in the inner region of said cabinet and shoulders (14) on the rear face of the base (10) of the cabinet holding said base (10) away from the support surface on which the cabinet is fixed, favoring air circulation and heat dissipation.

None of the state-of-the-art documents are intended for an office for the

SP # 7288522 vl Installation of electronic type power meters capable of installing several meters, whether single or three phase.

OBJECT OF THE INVENTION

The object of the present invention is a Centralized Measurement enclosure that does not interfere with the metrological aspects of the meters installed internally to them, and at the same time adds useful information to the electric power distributors in order to improve measurement management and meter integrity.

SUMMARY

The cabinet of the present invention comprises a cube-shaped box with rounded corners having a flat edge at its end; front cover to be received on the flat edge of the safety lockable box and secured by upper hinges; double strap on the rear portion of the enclosure box to secure the enclosure to the post or any external structure; mounting brackets for installing the power meters and cabinet monitor, as well as an internal lock protecting them from being unduly removed from the housing; optical bus to identify each power meter properly installed in the enclosure; input terminal block which is also protected by a locking lid; output terminal blocks.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a front perspective view of the cabinet for installing centralized metering power meters with the lid installed.

Figure 2 is a rear perspective view of the cabinet for installing centralized metering power meters.

Figure 3 is a front perspective view of the cabinet for installing centralized metering power meters with the same cap removed showing the power meters properly installed with the input terminal block cover closed.

Figure 4 is the same front perspective view of the enclosure with the enclosure lid and input terminal strip removed. Figure 5 represents the enlarged front view of the interior of box 2 highlighting the

installation of power meters and cabinet monitor 10.

Figure 6 represents the enlarged rear view highlighting the installation of the power meters and cabinet monitor 10.

Figure 7 is a view of the main board structure highlighting the optical bus for identifying each power meter installed in the case.

SP # 7288522 vl DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a Cabinet for the installation of Centralized Measurement Meters that does not interfere with the metrological aspects of each meter and, at the same time, adds useful information for the management of meters installed internally to the cabinet.

The non-interference with the metrological aspects of the meters is due to the fact that while such cabinets control which meters are installed inside the meter, whether the meter access door is or has been opened, where in the cabinet it is located. If each meter is installed, among others, such cabinets do not, in turn, interfere with any aspect of the electricity measurement, in the communication of each meter individually with its remote display or in the communication of each meter individually with the systems. of data processing of the electricity distributor.

This condition makes use of a technical architecture that defines, among other things, that each meter must be able to perform its function regardless of whether it is installed in a Centralized Measurement cabinet, in such a way as to be autonomous in its metrological functions. legally relevant as stipulated by the Metrological Authority.

The office, in turn, adds functionality not in metrological aspects, but management, collaborating to assist in the management aspects of the meters that are installed inside it, informing what they are, where they are installed and whether or not they are being accessed. unduly.

In order to understand the importance and size of this invention, it is necessary to describe what the problems of the current state of the art are.

In the current state of the art, offices perform functions that are considered legally relevant in the aspects of Legal Metrology. One of these concerns that in the offices there are electronic equipment responsible for reading and concentrating data from one or more installed meters, performing the function of sending this data to a data processing center and sending to each meter. installed, their data to consumer installed power consumption displays (A).

Because it performs a metrologically relevant function, namely communicating data from a meter to a consumer remote display, the assessment imposed by the Metrological Authority for regulatory aspects of measurement certification is imposed not only on meters installed within the enclosure, but to the cabinet with its meters installed as a set, or system.

Although it is known that such certification is possible, the result of a

SP # 7288522 v! Metrological certification of the system as a whole has a number of consequences for the electricity distribution companies that clutter the maintenance and logistics services associated with these systems. An example is the need to replace any of the meters installed inside the case; when the entire system, including non-defective parts, is required to undergo a verification process, causing disruption to the time and cost required for a maintenance process (B).

Another typical problem is that because they need to undergo integrated testing, meters and cabinets are eventually supplied by the same manufacturer, and this generally eliminates healthy competition processes, making it more difficult to reduce costs by market competition processes. (Ç).

This patent solves these problems by creating a cabinet that favors Centralized Measurement without, however, interfering with the metrological and communication aspects of the meters installed within the cabinet. This is achieved on the one hand by setting a technical standard and a technical architecture that meters must follow - in order to perform all their metrological functions independently of the cabinet - while on the other hand performing functions in the cabinet that they have. solely and exclusively to support the management of meters installed inside the cabinet.

Thus, one of the problems previously presented (A) is fully solved, as it is stipulated that each meter perform all measurement and communication processes independently, without relying on the electronic resources of the cabinets.

At the same time, by stipulating that meters should be fully autonomous regarding measurement, another problem (B) is fully solved, as it becomes possible to demonstrate to the Metrological Authority that - in the event of a defect in a meter, such a meter may suffer. maintenance without the entire system (cabinet and all other non-defective meters) having to be re-certified.

Finally, by performing its functions without interfering with metrological aspects, the cabinet object of this Invention Patent can be manufactured according to a set of specifications by any manufacturer, solving another of the problems (C) previously presented.

The present invention was conceived with the purpose of establishing more efficient standards for distribution utilities and consumers regarding the correct installation of digital energy meters in enclosures, in a grouped manner. Accordingly, the invention is set forth below with detailed description of each component with reference to the accompanying drawing sheets.

SP # 7288522 vl Figure 1 is a front perspective view of the cabinet for installing power meters for centralized metering with the lid installed. In Figure 1 the cabinet is generically named by the number 1. The cabinet

1 comprises a cube-shaped box 2 with rounded corners and having a flat edge 3 at the end for receiving front cover 4. Front cover 4 has a security lock 5 and is secured to box 2 of cabinet 1 by two hinges 6. Enclosure 2 and front cover 4 of enclosure 1 may be constructed of any suitable material capable of withstanding the prevailing weather conditions in the power pole installation environment. The figure

2 is a rear perspective view of the cabinet for installing centralized metering electric meters. Enclosure 1 comprises at its rear portion a double attachment strap 8 for securing enclosure 1 to the post or any external structure.

Figure 3 is a front perspective view of cabinet 1 for installation of power meters 9 for centralized metering with front cover 4 of it open illustrating properly installed power meters 9 and cabinet monitor 10 as well as the lock 11 securing them from being unduly removed from housing 2. On the inner left side of housing 2 is located the input terminal 17 shown in Figure 4 which is also protected by a cover 18 and a lock 19. On the base At the bottom of the left box 2 is the cable entry passageway 7 and the exit passageways 20.

An enlarged front view of the installation is shown in Figure 5 by means of fasteners 12 of the power meters 9 and cabinet monitor 10 which function as a rail for engaging them. The enlarged rear view of this installation is shown in Figure 6, where the electric meters 9 are fixed through the phase 15 and neutral phase knives 16 and the cabinet monitor 10 through the neutral knife 16 only.

The function of cabinet monitor 10 is to monitor cabinet 1 and identify the power meters 9 installed on it. This identification is by means of optical LEDs 14 on an optical bus 13 according to Figure 7 present in cabinet 1 and identifying each electric meter 9 properly installed in cabinet 1 according to its type, serial number and position. occupies inside the cabinet.

The cabinet monitor 10 also has the function of monitoring the access to the entrance extension of the cabinet 1, informing through remote communication the existence of electrical connections made in the entrance extension, allowing the electric power distributor to know which cabinets have connected consumers. improper way

SP # 7288522 vl inside enclosure 1 (connections derived directly from the input branch to power a consumer without this power being measured).

Cabinet monitor 10 also monitors the opening of the internal lock 11 which gives access to the electric meters 9, informing the electricity distributor of all accesses that involve inserting or removing meters 9 from the cabinet 1, allowing the distributor to follow the performance. of field technicians in the installation of consumers.

The enclosure monitor 10 also monitors the opening of the enclosure's external front cover 4, so that the opening of this front cover 4 is signaled to the distributor by remote communication processes, allowing to identify lawful equipment maintenance actions from illicit opening actions to perform measurement frauds.

SP # 7288522 vl

Claims (8)

1. Cabinet for the installation of centralized metering electric meters, characterized in that the cabinet comprises: cube-shaped box (2) with rounded corners having a flat edge at the end (3); front cover (4) to be received at the flat edge (3) of the housing (2) with safety lock (5) and secured by upper hinges (6); double securing strap (8) at the rear of the enclosure housing (2) (1) for securing the enclosure (1) to the post or any external structure; cabinet monitor (10) for housing monitoring (2); internal lock (11) for protection against improper withdrawal of power meters (9) and cabinet monitor (10); mounting devices (12) for cabinet meters and monitor; optical bus (13) and optical LEDs (14) to identify each power meter (9) properly installed in the cabinet (1) according to its type, serial number, and position within the cabinet (1); cable entry (7) for the input terminal block (17) which has a locking cover (18) (19) and cable outlet (20) of cabinet 1; and phase knives (15) and neutral knives (16).