UZM-51M: connection diagram, reviews and instructions

To protect electrical equipment from sudden voltage surges, the relay type UZM-51M is used. The modification consists of a modulator and contacts. In this case, the relay is used for high conductivity. The expander in the model is installed with contact resistors.

Connect the device to the network for one, two and three phases. The threshold voltage level can be adjusted. The sensitivity index depends on the current overload.

Reviews about the model

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 able to work with impulse capacitors. Resistors in the model burn out quite rarely. For the BO series, it fits perfectly. The threshold voltage of the model is adjusted without problems.

Also UZM-51M reviews positive for the possibility of connecting zener diodes. However, it is important to consider the shortcomings of the modification. First of all, experts note large dimensions. In this case, the fuse is only used at 200 V. Converters in the circuit of this model is not capable of replacing.

Device for protection УЗМ-51М: instruction on connection

The standard connection scheme involves the use of a triode. This element is often installed with impulse capacitors. A rectifier is used to control the pore voltage. If you look at the flaps with through contacts, the thyristor is used for high conductivity. Before connecting the modification, the maximum resistance in the circuit is checked. It is also important to note that controllers with an overlap are prohibited.

Connection to a single-phase network

At УЗМ-51М connection to a single-phase circuit is carried out through wire 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 plate. If you believe the experts, the rectifier is put in the last place.

Contactors are used to increase the voltage stability. These elements can be used either operational or impulse type. To solve problems with magnetic oscillations, pass filters are used. For shields of the VO series they are used with a grid winding. The inverter can be mounted 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.

Two-phase network

The model UZM-51M connection to a two-phase circuit occurs in several ways. First of all, experts recommend using a commutating converter. It is sold, as a rule, with one adapter. The transceiver for connection is selected by the beam type. Most often, the filters are installed behind the trigger. A dynistor for voltage stabilization is needed with low conductivity. For a two-phase circuit, the output voltage should not exceed 230 V.

It is also important to note that resistance must be checked before connecting. The specified parameter must not exceed 35 ohms. At sharp jumps of pressure experts recommend to put динисторы. These devices are usually used as a broadband type. If we consider a circuit with a double converter, then for normal operation of the device a controller is required.

Connection to a three-phase circuit

The three-phase circuit UZM-51M (shown below) can only be connected via a damper. The element is produced in two-channel and three-channel type. If we consider the first variant, the capacitors are of the conductor type. A total of three transceivers are required for the connection. Stabilizers are most often used with an overlay. In some cases, a thyristor is installed.

If we consider the connection scheme with a three-wire damper, the capacitors are of the open type. It is also important to note that a comparator is required to install the model. The conductivity indicator for it must be 4.6 microns. The maximum resistance of the relay UZM-51M can withstand 50 ohms. Before connecting the device, the sensitivity of the modulator is checked.

Shields for 220 V

To the 200 V panel, the UZM-51M can be connected via an expansion type transceiver. These elements are sold for 3 and 5 A. In this case, the conductivity of the current depends on the capacitors. If we consider modifications with walk-through models, then the trigger is set to analog type. It is also important to note that capacitors of low frequency type are suitable for the shield for 220 V. In this case, magnetic interference can be controlled by a wave stabilizer.

Shields for 250 V

In order to protect the electrical equipment on the shield 250 V, UZM-51M is often installed. The device connection scheme assumes the use of a comparator. However, it is important to note that capacitors are only used with low capacity. In this case, the wired-type triggers are very rarely set. To solve problems with magnetic interference, filters of various types are used.

The trigger in this case is allowed to set the digital or analog type. If you look at the shields of the VO series, then it is more appropriate 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 network congestion averages 3.5 A. If we consider circuits with digital triggers, then damping is used to improve current conductivity. These elements are installed behind the transceivers.

Connection to the switchboard for 300 V

To the switchboard for 300 V, the UZM-51M can be connected through a pass-through trigger. However, it is important to note that in this case the impulse capacitors are prohibited. First of all, this is caused by a significant decrease in the conductivity of the current. Directly on the relay is a large load. 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 factor is 5 A. To protect the trigger, insulators are used. In some cases tetrodes are installed. These elements are suitable for the BO series. Comparators are only able to work with thyristors. In some models, contactors are replaced with kenotrons.

Connection via 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 type. In this case, expanders are installed behind the filters. The converter is suitable with an output voltage of 200 V. The transceivers may be installed with or without stabilizers. Directly controllers are used with low current conductivity.

If we consider impulse modifications, the maximum resistance does not exceed 30 ohms. In this case, network congestion parameter stored at 4 A. If we consider the modification conductor, the maximum resistance is equal to 45 ohms. On average, the chain congestion factor is 6 A.

Using wired triggers

Through a wired trigger, the UZM-51M can be connected to the BO series. For this, the dinistor is used with the controller. The transceiver may only be installed in an expansion type. To combat magnetic interference, a stabilizer is used. Many experts recommend installing only conductor capacitors. In this case, three resistors are required. The lining for them is installed without filters.

Diode trigger circuit

By means of a trigger diode UZM-51M device can be connected to the circuit 200 and 300 V. If we consider the first embodiment, the capacitors used with a stabilizer. Directly thyristor is selected impulse type. To increase the conductivity of the current, a triode is needed. In some cases, the trigger is installed behind the stabilizer.

If we consider 300 V circuits, the capacitors are taken to be of the single-pole type. The output controller is installed behind the trigger. To combat magnetic interference, tetrodes are used. A total of 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 ЩО-II-1А-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 drop in frequency are solved by filters. The contactors of the models are of unidirectional type. Also it is possible to meet modifications with two-way analogs.

In this case, the comparator is used without filters. Particular attention should be paid to the controller. This element is responsible for the conductivity of the relay. To minimize the heat losses, many experts recommend it to install the operating type.