摘要:
The present invention provides an online monitoring circuit of the series compensation spark gap divider return circuit, said series compensation spark gap divider return circuit includes voltage equalization link and the voltage sampling link; Said voltage link includes the capacitor C which series said voltage equalization link; Said online monitoring circuit includes the voltage sampling input module, series compensation current input module and the compare module; Said sampling voltage input module after amplified the voltage of the two ends of the series capacitor C converts it into direct current signal Udivide voltage; Said series compensation current input module after amplified the current signal of said series capacitor converts it into direct current voltage signal UCT; Said compare module realizes online monitoring the running state of said series spark gap divider return circuit though comparing said Udivide voltage and said UCT. can let the operator master the working condition of the divider return, avoid unnecessary worry, make sure the spark gap can trigger ignition reliably when the line break down, improve the spark gap working reliability greatly.
摘要:
A mobile generator for generating a direct voltage for a tool supplied with direct current includes an alternating-voltage generator (1), an electronic control unit (3), a rectifier unit (2), which has a direct-voltage output (6) with live conductors (9, 10) for connecting the tool (11), and a protective device (14). The protective device is between the live conductors (9, 10) and a protective potential (18), especially ground or a protective wire. The protective device (14) has an insulating spark gap (15) responding in the case of an error with a defined response voltage (UT) for grounding the live conductors (9, 10).
摘要:
An electrical circuit protective arrangement in which a reed spring relay has provided a back contact probe element associated with one of the springs and makes contact therewith when the normally closed springs are open and presents a gap with the associated spring when the springs are closed. The springs are serially connected in the electrical circuit and are of a magnetically responsive material so that the springs are forced open when an undesirably high current is present in the circuit which in turn completes a detection and alarm circuit when the probe element makes contact with the spring. The relay envelope contains a gas which ionizes in the gap to complete the same detection and alarm circuit when a dangerously high voltage appears across the gap although the springs remain closed.
摘要:
The invention relates to an arrangement for overload protection for overvoltage protection equipment that has at least one voltage-limiting element and at least one voltage-switching element, and optionally with a back-up fuse, wherein the voltage-limiting element is in the form of a varistor and the voltage-switching element is in the form of a spark gap and these elements are connected in series. According to the invention, to protect against inadmissible pulsed currents, the voltage-limiting element in the series circuit has a monitoring spark gap, forming a bypass, connected in parallel with it. Furthermore, a monitoring device, e.g. a thermal monitoring device, is provided that bypasses both the monitoring spark gap and the voltage-switching element in the event of ageing effects, inadmissibly high mains voltages and/or low-energy, periodic, high-frequency overvoltages.
摘要:
A circuit interrupting device including a loop split interrupter for interrupting a loop split circuit with a high current and a low voltage and a quick whip interrupter for interrupting a charging circuit with a low current and a high voltage.
摘要:
Suitable for retail sales or contractor installation, this low-cost, multi-configurable five-part modular system protects sensitive equipment from lightning damage more completely than the limited ability of surge protectors, in homes, boats, offices and industrial applications. A wall outlet connected module can function by itself as a very capable lightning arrestor for 120 VAC power connected equipment. It also can provide protection to surge protectors as well as other modules, if employed. In the other system modules, an AC connected detector control module and three singularly optional accessory modules, permit advance warning, timed interrupt of AC power as well as coaxial or phone line connection control. Reacting to electromagnetic energy bursts up to approximately two miles away, only very local lightning causes system timer operation, avoiding unnecessary shutdown and resetting of equipment. The calibrated trigger range is adjustable down to approximately 1/2 mile and a manual reset feature allows restoring all equipment operation should a threat quickly pass.
摘要:
This invention is to provide a transforming system capable of satisfactorily protecting the equipment of a substation even if a aerial electric power lines is struck directly by an intense electric shock of a large energy, such as an electric shock of a waveform similar to that of a thunderbolt stroke having a long duration of wave tail. So, this invention, a transforming system comprises, a lightning arrester, a ground fault device installed near a service entrance through which the power lines are led in, a voltammeter placed on the gas-insulated switchgear, and a control device receiving a signal from the voltammeter and providing a signal for controlling the grounding device. And when detecting of said thunderbolt arising in said aerial electric power line, a control device which order said ground fault device to make the ground fault condition.