Installation of the relay protection against voltage surges
A little background. One of our ordered it constantly worried about the problem of poor power: the voltage drops to 150-160 in, then there are abrupt jumps to 280-290 V. Installed during the construction of the house current stabilizer can not cope with its function due to the fact that equipment, consumers have more than one greater than the rated power of the stabilizer, and he constantly turns off heat blocking. Considering this fact, for the operation of the electrical equipment necessary for start up current Bypass, bypassing the regulator, ie actually leaving all electrical equipment without protection against power surges. And one day, when the work of all the equipment was carried out just on the bypass, there was a jump voltage resulting in most of the burned home appliances - televisions, computers, washing machine and so on. After this event zakazchitsa asked us to solve the problem of overvoltage. So.
The task: ensure the protection of electrical overvoltage of a country cottage home.
Progress of works: To start the initial data: the house opened a three-phase electricity, the stabilizer rated power of approximately 12 kW, can withstand short-term peak loads of up to 15 kW. However, there are frequent power surges from 150 to 290 V for each phase. That's actually very electrical distribution panel:
As already noted, as a result of the survey electric circuit is established that the previously set stabilizer could not cope with the load and consumed switched off by a thermal blocking, whereby necessary to switch power to the bypass line, leaving all the electrical equipment without protection from surges voltage. Given that in a short time to home zakazchitsa planed gas and part load (double-boiler) will be removed from the stabilizer, whereby the total power all consumers will be equal to the nominal (operating power) of the stabilizer, in coordination with the ordered it, it was decided not to exclude it from the chain, and temporarily disable the dropping of the current Bypass. However, to ensure the protection of electrical equipment against voltage surges, we recommended set after stabilizer for each phase voltage relay, intended to protect appliances in the apartment of emergency surge (as in most, and the lower side), and excess power consumption over 13.8 kW.
The very process of setting relay surge will not describe - all clear from the instructions for use. We note only that the protection relay is installed in the panel on a standard DIN-rail, is programmed once and then secures a country holiday home in a fully autonomous mode. off threshold current = 63A. Voltage relay is completely independent of other devices holiday home security element. To use it, it does not require any additional equipment. Built-in voltmeter and ammeter. voltage and current in the circuit current value is displayed on the screen. The photo below shows the result of the installation of protection relays from power surges:
More detailed information on progress of the works can be found in our photo gallery. The total run time of installation of protection relays surge was 1 day.