Now it has become quite common practice to install a voltage monitoring relay in the residential sector, to protect electrical equipment from a zero break, from overvoltage and undervoltage.
On Instagram and YouTube, you can see that many of my colleagues are experiencing problems in this area, after installing voltage control relays from Meander, and some other manufacturers that fail quite often, my colleagues have to change them, basically they change them to the same ones, and everything repeats again.
Video about the marriage of Meander products of one of my colleagues: .
Many are now puzzled by the choice of which manufacturer's equipment to use, although the answer has always been obvious, it is best to use equipment from manufacturers such as Siemens, Schneider Electric.
I want to share here my experience and reliable solutions that I use in the residential sector.
Solution for a three-phase network
.
Parameters controlled by the relay:
No neutral.
Overvoltage and undervoltage phase-to-phase.
Overvoltage and undervoltage phase-zero.
Load switching via .
Switching of the coil of the contactor KEAZ PM-12 250 A by means of .
Solution for a single-phase network
.
Parameters controlled by the relay: overvoltage and undervoltage detection.
Load switching via .
I also want to note the silent operation of the Schneider Electric TeSys modular contactor.
This article is not an advertisement, I use Schneider Electric products, because ABB has a large number of marriages, and Siemens is much more expensive in terms of cost and longer in terms of delivery.
Source: habr.com