To protect electrical equipment from sudden power surges, a relay type device UZM-51M is used. The presented modification consists of a modulator and contacts. In this case, the relay uses high conductivity. The expander in the model is installed with contact resistors.
It is allowed to connect the device to the network in one, two and three phases. The threshold voltage level can be adjusted. The sensitivity indicator depends on current overload.
Model reviews
UZM-51M reviews from experts mostly get good. First of all, they note the high conductivity of the current. It is also important to note that the model is capable of working with pulse capacitors. Resistors in the model burn out quite rarely. For VO series guards, it fits perfectly. The threshold voltage of the model is regulated without problems.
Also, the UZM-51M receives positive reviews for the ability to connect zener diodes. However, it is important to consider the disadvantages of the modification. First of all, experts note large dimensions. In this case, the fuse is used only at 200 V. The specified model is not able to replace the converters in the circuit.
UZM-51M protection device: installation instructions
The standard connection scheme involves the use of a triode. The indicated element is often installed with pulse capacitors. A rectifier is used to control pore voltage. If we consider the shields with feed-through contacts, then the thyristor will use high conductivity. Before connecting the modification, the maximum resistance in the circuit will be checked. It is also important to note that lined controllers are not allowed.
Connection to a single-phase network
UZM-51M connects to a single-phase circuit through wired contacts. In this case, the thyristor can be used at 200 V. First of all, it is important to note that the filters are installed behind the lining. According to experts, the rectifier is put last.
Contactors are used to increase voltage stability. These elements can be used operational or pulse type. To solve problems with magnetic vibrations, pass filters are used. For VO series shields they are used with a mesh winding. The converter can be installed on three contacts. In this case, the maximum resistance should not exceed 30 ohms. The output voltage on the relay is an average of 230 V.
Biphasic network
In the UZM-51M model, connection to a two-phase circuit occurs in several ways. First of all, experts advise using a switching converter. It is sold, as a rule, with one adapter. The transceiver for connection is selected beam type. Most often, filters are installed behind a trigger. A dynistor for voltage stabilization is needed with low conductivity. In a two-phase circuit, the output voltage indicator should not exceed 230 V.
It is also important to note that the resistance should be checked before connecting. The specified parameter must not exceed 35 ohms. With sudden power surges, experts recommend installing dinistors. These devices are used, as a rule, broadband type. If we consider a circuit with a double converter, then for the normal operation of the device you will need a controller.
Connection to a three-phase circuit
To a three-phase circuit UZM-51M (the diagram is shown below) can be connected only through a damper. The specified element is available in two-channel and three-channel type. If we consider the first option, then the capacitors are used conductive type. In total, you need three transceivers to connect. Stabilizers are most often used with a lining. In some cases, a thyristor is installed.
If we consider the connection diagram with a three-wire damper, then the capacitors are used open type. It is also important to note that a comparator is required to install the model. His current conductivity is required to be 4.6 microns. The maximum resistance of the UZM-51M relay can withstand 50 Ohms. Before connecting the device, the sensitivity of the modulator is checked.
220V shields
The UZM-51M device can be connected to a 200 V panel through an expansion transceiver. These items are sold at 3 and 5 A. In this case, the current conductivity depends on the capacitors. If we consider modifications with pass-through models, then the trigger is installed analog type. It is also important to note that low-frequency type capacitors are suitable for a 220 V shield. In this case, magnetic interference can be controlled using a wave stabilizer.
250V shields
In order to protect electrical equipment, a UZM-51M is often installed on a 250 V shield. The device connection scheme involves the use of a comparator. However, it is important to note that capacitors are only used with low capacitance. In this case, wire-type triggers are very rare. Different types of filters are used to solve problems with magnetic interference.
The trigger in this case is allowed to install a digital or analog type. If we consider the shields of the VO series, then it is more advisable to use varistors. These devices can only work with analog triggers. In this case, the maximum resistance is 55 ohms. It is also important to note that the network congestion averages 3.5 A. If we consider circuits with digital triggers, then dampers are used to improve current conductivity. The indicated elements are installed behind transceivers.
Connection to 300 V dashboard
The UZM-51M device can be connected to the 300 V dashboard through a pass-through trigger. However, it is important to note that pulse capacitors in this case should not be installed. This is primarily due to a significant decrease in current conductivity. The relay itself is heavily loaded. In some cases, the rectifier burns out.
To solve the problem, only linear capacitors are used. In this case, the maximum resistance in the circuit does not exceed 60 Ohms. It is also important to note that the overload indicator is 5 A. Insulators are used to protect the trigger. In some cases, tetrodes are installed. The specified elements are suitable for VO series guards. Comparators can only work with loop-through thyristors. On some models, contactors are replaced by kenotrons.
Connection via a magnetic trigger
Connecting a device through a magnetic trigger is quite simple. However, it is important to note that it can only be used in a single-phase circuit. Varistors are allowed to take only a through-flow type. In this case, expanders are installed behind the filters. The converter is suitable with an output voltage of 200 V. Transceivers are allowed to be installed with and without stabilizers. Directly controllers are used with low current conductivity.
If we consider pulse modifications, then the maximum resistance does not exceed 30 Ohms. In this case, the network congestion parameter is at a level of 4 A. If we consider the conductor modifications, then the maximum resistance is 45 Ohms. The average circuit overload is 6 A.
Using wired triggers
Through a wired trigger, the UZM-51M device can be connected to the VO series shields. For this, the dinistor is used with the controller. The transceiver may only be installed as an expansion type. To combat magnetic interference, a stabilizer is used. Many experts recommend installing only conductive capacitors. In this case, three resistors are required. The cover for them is installed without filters.
Diode trigger circuit
Using a diode trigger, the UZM-51M device can be connected to a circuit of 200 and 300 V. If we consider the first option, then the capacitors are used with a stabilizer. Directly the thyristor is selected pulse type. To increase current conductivity, a triode is required. In some cases, the trigger is installed behind the stabilizer.
If we consider 300 V circuits, then the capacitors are taken of a single-pole type. The output controller is installed behind the trigger. To combat magnetic interference tetrodes are used. In total, three comparators are required for the circuit. In this case, the maximum resistance fluctuates around 50 ohms. It is also important to note that the current conductivity does not exceed 4.5 microns.
Connection to the shield -II-1-25
A protection device of this type can be connected to the shield via wire triggers. However, it is important to consider that the varistor for the network is selected with low conductivity. Problems with a sharp decrease in frequency are solved thanks to filters. Contactors for models are used single-junction type. You can also find modifications with two-junction analogs.
In this case, the comparator is used without filters. Particular attention should be paid to the controller. The specified element is responsible for the conductivity of the relay. To minimize heat loss, many experts recommend installing it of the operational type.