Independent release: connection diagram, operating principle, photo

Independent releases are devices that are installed with circuit breakers. Most often, models are used in the design of ventilation. It is also important to note that the trip units are able to be operated with load switches.

Manufacturers make models for 20, 24 and 30 A. The design of the device may differ. In order to understand this question in more detail, a standard circuit of the release should be considered.

The scheme of the usual model

The independent release for the circuit-breaker has a diode rectifier. Dinistors are used in various conductivities. In this case, expanders are installed with modulators. If we consider modifications for phase switches, then they have a transceiver. The relay is most often installed in the lower part of the structure.

Insulators are used for the safe operation of the release. Above the modulator are located contacts. Transistors are installed opposite each other. The kenotrons are often applied with an outer winding and are attached to the modulator.

Principle of operation

How does the independent release work? This question is of concern to many, but the answer to it is extremely simple. In fact, the principle of the independent trip unit is based on changing the position of the contacts. This is due to the supply of a short pulse from the diode rectifier. In this case, the transistor plays the role of a conductor. Due to the modulator, the frequency of the release can be adjusted. To combat electromagnetic interference, the kenotron is used.

Connecting the device

How to connect an independent release? If we consider ventilation systems, then the device is connected through dinistors. In this case, the output contacts are connected through insulators. Directly the parameter of negative resistance is required to oscillate around 25 ohms. Connection to the relay is provided through the expander. When connecting the load break switch , check the threshold resistance. The specified parameter should not exceed 30 Ohm. Fixation of the release is carried out in the power shield. To check the voltage, you need to use the tester.

20 A models

Release units of 20 A are often used for phase switches. The parameter of threshold voltage for the models is in the region of 220 V. Some modifications are made with stabilizers. It is also important to note that in the market are the releases with the protection system IP20. Transistors in them are of a broadband type. All this suggests that they can withstand large overloads in the circuit.

The connection to the shield of many models occurs through the kenotrons. They are produced most often of a two-contact type. Current conductivity in many models does not exceed 5 microns. It is also important to note that models for ventilation systems are manufactured with capacitor modulators. In some cases, they are mounted with expanders. For remote control of the switches, they fit perfectly.

24 A devices

Devices on 24 A consist of diode rectifiers. They are established with different conductivity. As a rule, the protection system is applied by the IP21 series. However, in this case, much depends on the manufacturer. Modulators are applied only to the orthogonal type. For impulse switches are suitable models based on semiconductor thyristors.

Stabilizers in devices are of low sensitivity. The output voltage of the releases of this type does not exceed 20 V. On average, the current conductivity is 3 μ. Insulators are used to secure the device to the shield. If we consider modifications without transceivers, then they use a capacitor block. Many modifications are suitable for low-voltage switches.

Modifications to 30 A

Release units of 30 A are manufactured with code expanders. The output voltage of the models is 35 V. As a rule, rectifiers are of the diode type. In this case, the contacts are mounted on movable plates. Transceivers are used with trimming resistors. Many models are connected to the shields through condenser units. In order to avoid large chain overloads, expansion dinistors are used.

Some releases are made on the basis of a bipolar transceiver. Their distinctive feature is the high conductivity of the current. This parameter fluctuates around 6 microns. However, the disadvantage of such systems is the rapid wear of capacitors. It is also important to note that the models are not suitable for impulse switches.

Model Z-ASA / 230

Disabling of ventilation in case of fire through an independent release of Z-ASA / 230 occurs very quickly. This model is produced with movable plates. In total there are six pairs of contacts. For impulse switches, this device is ideal. It is also important to note that the model is able to be operated in conditions of high humidity. Direct opening of the contacts is very quick. For remote control of the ventilation system, this installation is suitable. The conductivity of the current of the shunt release is 4.5 microns.

In this case, the output voltage on the relay is 30 V. The stabilizer in the device is installed without an adapter. Transistors are of a double type. The kenotron is not provided for in the model. Connection of an independent release to the shield is effected via a DINostore. It is installed with one panel, which is located at the bottom of the case. Before connecting the device, first check the negative resistance for each phase. It is also important to note that the wiring is important to carefully isolate.

Model Z-ASA / 250

Why is an independent Z-ASA / 250 shunt trip necessary? This model is used exclusively for phase switches. The conductivity of the current is 4.5 microns. Threshold overload of the device is no more than 24 A. The output voltage on the relay does not exceed 33 V. The rectifier is installed diode type. In total, there are five pairs of contacts in the device. The modulator of this release is of an orthogonal type. To connect the model, a capacitor block is used, which is included in the standard modification kit.

If we talk about design features, it is important to note that the transceiver is of the single-pole type. The manufacturer's protection system is provided with the marking IP30. The minimum permissible temperature of the release is no more than -15 g. The stabilizer is not provided for in this configuration.

Model IEK РН47

This independent release (the photo shown below) is pretty much in demand. First of all, it is important to mention its compactness. A small condenser block is used to connect to the shield. In total, the model uses two rectifiers. Contacts in this case are mobile type. Directly the expander is located in the lower part of the structure together with the relay. The transceiver is not in this case.

Speaking about the parameters of the trip unit, it is important to note that the output voltage is maintained at 40 V. The threshold overload of the model is 30 A. The minimum permissible temperature of the release does not exceed the exponent of -10 degrees. The model is not afraid of high humidity. The protection system is standardly applied with the IP30 marking. Wiring in this case is used with insulators for safe operation.

Model IEK РН48

This independent release (connection diagram shown below) is made with two diode-type rectifiers. The relay uses a high-voltage device. The conductivity parameter is at a level of 4 microns. In total, the device has two resistors. Contacts are installed on special plates. The opening is carried out quite quickly. It is also important to note that the device can be connected via a capacitor unit. The output relay is located at the bottom of the structure.

The modulator is of the orthogonal type. For phase switches the model is suitable. Speaking about the parameters, it is important to note that the threshold overload is at the level of 24 V. The output voltage on the relay reaches a maximum of 30 V .. The minimum permissible temperature of the modification is -15 degrees. The protection system in the release is applied with the marking IP30.

Model IEK РН50

This independent release is made for impulse and phase switches. For ventilation systems and drives it fits well. The current conductivity index is about 3 microns. The parameter of negative resistance on the relay reaches up to 46 ohms. Transceivers in the release are of a two-pole type. In total, the model has three pairs of contacts.

They are attached to special plates that are above the relay. The modulator is provided by the manufacturer in the orthogonal type. The model can not be connected via the condenser unit. Only kenotron is suitable for this. The minimum permissible temperature of the release is -10 degrees. The output voltage on the relay reaches up to 40 V.

Model SHUNT 230 VAC

This independent release can only be used in pairs with a phase switch. For remote control of the drive, the model fits perfectly. The expander here is of the code type. Also of the features should be noted the presence of trimmer resistors. Directly the signal is transmitted via a diode rectifier. The modulator is used in an orthogonal-type circuit. The threshold overload of the system does not exceed 30 A. The minimum permissible temperature of the release is at -20 degrees.

Model SHUNT 250 VAC

This independent release (connection diagram shown below) is made on the basis of a diode rectifier. It is located over the relay. If we talk about the parameters of the device, then the negative resistance of the system is 44 ohms. In this case, the threshold overload is no more than 24 A. To connect the modification there is a compact capacitor unit. Conductors in this case are used with insulators. In total, the model has three pairs of resistors. They are located above the rectifier. The stabilizer in this case is not provided by the manufacturer. For low-power drives, this model is ideal.

Model S2C-A

This independent release can only be used with impulse switches. The rectifier in the device is installed diode type. The relay is used with the expander. The current conductivity index is no more than 4.5 microns. Transceivers are installed over the relay.

The stabilizer in the presented release is not installed. Contacts on the model are located on the plates. The signal is transmitted via an orthogonal type modulator. The trip unit is connected via a kenotron. Condenser units for this purpose are not suitable. The minimum permissible temperature of the release is at -10 degrees.