Abstract:
A device for detecting a fault of at least one street lamp of a plurality of street lamps which are connectable in common to an AC power supply is proposed. The proposed device allows detecting whether a fault has occurred based on obtaining measures representative of the total active and reactive power supplied by the AC power supply to the plurality of street lamps, and detecting variations in these measures. Optionally, also the type of fault can be determined based on detected variations in the power measures.
Abstract:
Dispositivo de control de punto de luz que se caracteriza porque comprende una entrada de corriente eléctrica; una salida de corriente eléctrica; una fuente de alimentación conectada a la citada entrada; un detector de consumo entre la entrada y la salida; un dispositivo de comunicaciones por red eléctrica para comunicación a través de la red eléctrica a la que se conecta el dispositivo; y un comparador lógico electrónico conectado eléctricamente a la fuente de alimentación, al detector de consumo y al dispositivo de comunicaciones, para controlar el envío de información del dispositivo de comunicaciones.
Abstract:
A central test radio frequency system for emergency lighting comprising a set of emergency light units or (CU) that manages the system's functionality, wherein each of said emergency lamps (LI-L13) has a radio transmitter-receiver (MR), which is able to communicate to each other emergency lamps and to the remote control unit (CU) via radio signals.
Abstract:
It is disclosed that a lamppost (2) can comprise a low pass filter (17) for preventing the creation of undesirable electromagnetic fields. The low pass filter passes a first signal (11) and prevents a second signal (12) to enter further into the lamppost (2). The first signal (11) can be a power signal that is transported via a powerline (10) to lampposts (1, 2). The second signal (12) can be a telecommunication signal that is transported via the powerline (10) to or from telecommunication equipment (7) that is present in one or more lampposts (1). The low pass filter (17) can be comprised by a second fuse (8’). There also can be a switch (18) comprised by the second fuse (8’) via which switch it is possible to activate and deactivate the low pass filter (17).
Abstract:
Eine Straßenleuchte mit wenigstens einer, in einem Gehäuse (2) angeordneten Lampe weist ein Detektormodul (4) auf, welches dann anspricht und ein Signal abgibt, wenn die Lampe (3) in Betrieb ist. Das Detektormodul (4) kann dabei eine Solarzelle oder ein Thermogenerator sein. Das Signal wird mittels eines Senders (5) per Funk an einen Signalempfänger in einem Straßenverteilerkasten (6) gesendet.
Abstract:
Half-level light signaling device is formed by a casing, including a lower part, which houses electrical and/or electronic circuits and at least one light source, and a cap protruding from the ground and removably fastened to the lower part. The cap has at least one aperture, to which a prism is connected, as as to send outwards a light beam produced by the light source. The signaling device includes at least one antenna, embedded in the isolating material making up the cap, and having the terminals accessible from the lower part of the casing.
Abstract:
A ballast protecting device is connected between an AC input voltage and a ballasted High Intensity Discharge lamp. The device includes a voltage sensing block, a current sensing block, a pulse forming block, a switch block and a micro-controller unit (MCU). The pulse forming block converts positive half cycles of the voltage and current provided by the voltage and current sensing blocks to square wave pulses, and the MCU performs a phase angle comparison between generated pulses. Upon lamp malfunction, ballast current is phase shifted. Current may also be phase shifted when there is a radical change in the input voltage. As a trend of the phase shift between current and voltage is determined by the MCU, a ballast disconnect decision is made, and the MCU actuates the switch block to disconnect the connected ballast and malfunctioning lamp.
Abstract:
The invention concerns a method for powering a discharge lamp with a switching power supply. Said method is characterised in that it consists in: applying a voltage firing the lamp, then after the lamp has been energized, applying a lower service voltage to the firing voltage. The firing and service voltages can be generated by using a resonant circuit at the terminals of which a chopped voltage is applied with different frequencies. The invention also concerns a light source comprising a discharge lamp and a switching power supply. Said light source can be equipped with devices for measuring several parameters, such as power, light intensity or the amplitude of vibrations. The invention is useful for producing public lighting.
Abstract:
A light monitoring system provides a sensing unit coupled to a luminaire. The sensing unit monitors both the input and the output of the luminaire for both current and voltage. In this manner, a variety of problems with the luminaire can be detected by the sensor and this information can be passed to monitoring equipment that is either hard-wired or remotely coupled to the sensing unit.
Abstract:
An apparatus and method for remotely monitoring the performance of an electrical appliance utilising the mains power supply cables of the electrical apparatus (4, 5, 6). A remote unit (3) is provided which communicates, using a signal at between 90 kHz and 145 kHz modulated on to the A.C. power supply cable of the electrical apparatus (4, 5, 6), with a local processing means (17) provided in the vicinity of the electrical apparatus (4, 5, 6). A memory means is provided to store information relating to the performance of the electrical apparatus (4, 5, 6). A robust communication protocol is provided to ensure that data is not lost. A control means is provided in the vicinity of the local processing means (17) so that the electrical apparatus (4, 5, 6) can be controlled via the remote unit (3). The system is primarily designed for monitoring items of street furniture (4, 5, 6).