The quality and voltage rating in a household network directly affects the working life and efficiency of household appliances. The Zubr voltage relay will protect the property from power surges and other negative factors associated with the supply of electricity. Consider the characteristics and features of this device, as well as reviews about it.
Regulations
Utilities are not active in the modernization and reconstruction of network lines, transformers and substations. In this regard, voltage drops have become not uncommon in recent times. According to GOST, the indicator in the household sphere should be no more than 230 V in one phase and 400 V between them. The Zubr voltage relay will allow to level critical parameters, even in the remote settlements.
Causes of Failure
Among the main aspects that cause a violation of the normal operation of the circuit, the following reasons are noted:
- A short between the phases and the neutral wire, which leads to a voltage surge up to 380 V.
- Burnout zero contact at low loads.
- A random distribution of the supplied current in phases, which causes a difference in the supplied voltage to the source.
By means of the Zubr voltage relay, the indicated moments can be minimized. The device will allow you to neutralize the voltage in a matter of seconds with any jump or drop, which is dangerous for household equipment.
Characteristic of the Zubr voltage relay
The device in question is a device with the layout of the electronic filling and the power part of the disconnectors, combined in a single housing. The main part of the relay is made on the basis of a microprocessor or a standard comparator. The first option is characterized by soft response when reaching the upper or lower critical point.
The advantage of the Zub voltage relay is its quick action. The fuse response time is calculated in tenths of a second. The activation threshold is adjusted using a potentiometer and a graduated scale. Unlike the stabilizer, the device in question does not equalize the mains voltage, but turns it off instantly. This allows you to effectively use the device in various emergency situations.
The device diagram allows you to control the current parameters when exceeding or lowering the limit inserts. In this case, the phase is turned off by opening the external supply network from the internal wiring.
The Zub voltage control relay can be single or three phase. In the first case, one phase is tripped, and in the second, the simultaneous deactivation of three elements. Single-phase modifications are most often used in everyday life, and three-phase analogues serve to protect production machines and other consumers.
Load
This indicator is one of the most important characteristics of the device. The load transfer determines the amount of voltage that the device can withstand. When choosing a relay, remember that usually the front part does not indicate the current of permissible operation, but the operating value, which is lower than the load skipping level. Experts advise purchasing a device of this type 20-25 percent higher in terms of the total transmitted power indicated on the nameplate.
For example, if a 16 A fuse is installed on the input device, it is advisable to install a relay with a rating of 25 A.
Management and advanced features
All considered devices are divided into two categories having digital or electromechanical control. The first samples work with the help of information displayed on touch screens. Simpler models operate with the conclusion of the required information through aggregation with a variable resistor, which is located on the front of the device.
Features of a single-phase voltage switch "Bison" type PH:
- The presence of a temperature indicator that allows you to protect device parts from overheating in case of poor contact.
- Possibility of fixing on a DIN rail or fastening with screws.
Since the device in question is an expensive type in terms of installation, the following rules should be observed when installing it:
- Directly in front of the relay, it is necessary to install an automatic standard circuit breaker of type "AB", which will provide protection against short circuit. Its current endurance should be 20 percent lower.
- It is advisable to use such devices as RCDs and stabilizers in combination.
- Installation and connection of the “Bison” voltage relay should be carried out in such a way that access is provided for its prevention and routine maintenance.
Modifications
The relay type plug-socket is mounted directly in the socket, serves to protect specific consumer groups. The device is controlled by a microcontroller. It analyzes the current supply voltage, displays the final value on a digital display. The load is balanced through an electromagnetic relay. To indicate the limit values and the response time, special buttons are provided.
Modification in the form of an extension relay according to the principle of operation is identical to the previous version. The difference lies in the fact that such a device can have several outlets and is able to secure several household appliances at the same time.
Din rail relay. Such a device is mounted in control cabinets. The main advantage of the device is the ability to protect not only individual consumers, but also the entire house or apartment. Such relays have a wide range of adjustment, can operate in several separate modes. For example, to control the total voltage, its minimum and maximum indicators, and also work as a time controller with a delayed turn on. Instructions for the voltage switch "Bison" states that the switching load, not exceeding 8.5 kV, is carried out directly by the contacts of the device. If this indicator is exceeded, shutdown is carried out by means of a magnetic starter, contactor or automatic fuse. Their power should correspond to the required values.
Features
The voltage indicator on the device in question shows the value in real time. This solution is very convenient, as it allows you to assess the situation with the current network parameter. The error of information is very low, does not exceed 1-2 V (relative to a high-precision multimeter). The Zubr relay is issued on the majority of rated currents: 63, 50, 40, 32, 25 A. The 63 amp device is able to withstand a load of 80 A for 10 minutes.
The lower voltage indicator is 120-210 volts, the upper limit is 220-280 V. The step varies in the range of 1 volt. In time, the re-activation occurs from 3 to 600 seconds with an interval of 3 seconds. The devices in question are also divided by type of construction. For example, if the marking has an index t, this means that the relay has thermal protection against internal overheating. Such a device automatically turns off when the contacts are heated above 80 degrees. On a Din rail, the controllers in question are only single-phase, occupy 3 modules or 53 mm. In the instructions for the device, the current limit is not more than 0.75 of the nominal value.
Voltage switch "Bison": reviews
Users note that almost everyone has experienced problems due to power surges. Since modern household appliances cost a lot of money, it is better to hedge and purchase a voltage relay. The Bison brand is one of the most affordable and reliable options. Among the advantages, users note the following aspects:
- Compact size.
- A wide range of nominal performance.
- Minimum error.
- Reliable monitoring of power surges.
There was a disadvantage with this device. The relay often trips, resulting in loss of electricity. Although this is a pretty controversial point about the cons. The main fault lies in the voltage drops, and the device just does its job.
Finally
The manufacturers of Zubr voltage relays assure that modern devices can be used and connected at par. If the device limit is less than the nominal value of the input automaton, it is necessary to adapt the contactor to the connection diagram. The manufacturer gives a solid guarantee on the product - 5 years. As consumer reviews show, this relay is among the leaders in its class. When choosing a device, consider its parameters and recommendations specified in the instructions.