Independent releases are devices thatare 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 30A. The design of the device may vary. In order to understand this question in more detail, the standard circuit of the release should be considered.
Independent release for automaticThe switch 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.
For safe operation of the releaseinsulators are used. Above the modulator are located contacts. Transistors are installed opposite each other. The kenotrons are often applied with an external winding and are attached to the modulator.
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.
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 with 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.
Release units of 20 A are often used for phaseswitches. 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.
Attaching to the shield of many models occursthrough 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.
Devices on 24 A consist of dioderectifiers. 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 used lowsensitivity. 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.
Release units of 30 A are produced with codeexpanders. 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 shields through condenser units. In order to avoid large chain overloads, expansion dinistors are used.
Some releases are made on the basis ofa two-pole 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.
Disabling ventilation in case of fire throughthe independent release of the Z-ASA / 230 is very fast. 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. The contact opening is very quick. For remote control of the ventilation system, this installation is suitable. The conductance of the current of the shunt release is 4.5 microns.
In this case, the output voltage to the relayequals 30 V. The stabilizer in the device is installed without an adapter. Transistors are of a double type. The model is not provided for by Kenotron. Connection of an independent release to the shield is carried out 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.
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 not more than 24 A. The output voltage on the relay does not exceed 33 V. The rectifier is installed diode type. There are five pairs of contacts in the device. The modulator of this release is of an orthogonal type. To connect the model, a condenser unit is used, which is included in the standard modification kit.
If we talk about design features, thenit 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.
This independent release (photo shown below)is pretty much in demand. First of all, it is important to mention its compactness. A small capacitor 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.
If we talk about the parameters of the release, it is importantNote 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 used with the marking IP30. Wiring in this case is used with insulators for safe operation.
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.
This independent release is made forpulse and phase switches. For ventilation systems and drives it fits well. The current conductivity is about 3 microns. The parameter of negative resistance on the relay reaches up to 46 ohms. The transceivers in the release are of the bipolar type. In total, the model has three pairs of contacts.
They are fastened on special plates, whichare 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.
This independent release can be usedonly on pair with the 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 trimming resistors. Directly the signal is transmitted by a diode rectifier. The modulator is used in an orthogonal circuit. The threshold overload of the system does not exceed 30 A. The minimum permissible temperature of the release is at -20 degrees.
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 block. 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.
This independent release can be usedonly with impulse switches. The rectifier in the device is installed diode type. The relay is used with the expander. The conductivity index of the current is no more than 4.5 microns. Transceivers are installed over the relay.
The stabilizer in the shunt release is notinstalled. The 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 are not suitable for this purpose. The minimum permissible temperature of the release is at -10 degrees.