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Siemens Relay Models

High-performance protection makes your power supply future-proof

Protection relays are essential for network operators, electricity suppliers, and industrial enterprises in every sector. For over 100 years, Siemens has been offering successful and always innovative SIPROTEC and Reyrolle protection relays and technologies. This means long-term user satisfaction with the products and solutions, with services, and with a partnership with a genuine global player. Siemens is the ideal partner for overcoming the challenges of the digital future.

The following is the product model and its introduction:

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Siemens Relay Models

Protection relay products and software - Secure and efficient grid operation:

1. SIPROTEC 5

SIPROTEC 5 is part of the new generation of incomparable modular, flexible, and intelligent digital field devices. With modularly designed hardware and software and its high-performance DIGSI 5 engineering tool, the SIPROTEC 5 product family of field devices are perfect for protection, control, monitoring, and measuring applications in electrical energy systems. SIPROTEC 5 offers a wide product range with modular elements for every application and requirement.

2. Reyrolle 5

Protecting grids with confidence

The protection, control, monitoring and measuring of our power networks is a vital element in managing our electrical assets, increasing reliability, sustainability and the safety of operating personnel. Our goal is to provide protection devices which provide flexible solutions and easy integration into an energy market which is becoming increasingly decentralized and digitalized. With the new Reyrolle 5 we have listened to the changing needs of our customers. Building on our 100-year history of developing protection relays we have used proven algorithms to ensure reliable performance. With IEC 61850 Ethernet communications as standard and enhanced cyber security the Reyrolle 5 enables substation digitalization.The user friendly, intuitive design and minimal ordering variants gives confidence to the user and this extends to the Reydisp programming software tools.

3. Reyrolle

The comprehensive range of Reyrolle products provides the total protection requirements of distribution markets and industrial applications – ranging from overcurrent protection via transformer protection and voltage control to a full spectrum of auxiliary and trip relays. The portfolio includes many famous products such as “Argus, “Duobias”, “Solkor”, “Rho, etc. Through successive generations, Reyrolle numerical products have been developed to increase value to system operators.

4. SIPROTEC Compact

Perfectly suited for protection in distribution systems and industry, with minimal space requirement. SIPROTEC Compact devices provide a comprehensive range of functions in a surprisingly compact and space-saving housing. Whether as main or as backup protection, a single SIPROTEC Compact device provides protection functionality for every conceivable fault. And it can do even more – it supports the control, automation, and monitoring functions in the substation.

5. SIPROTEC 4

SIPROTEC 4 leads the way in integrating protection, control, measurement, and automation functions in one device. The homogenous system platform, the unique DIGSI 4 engineering program, and extensive experience of more than a million successfully operating devices in the field worldwide – thanks to these unique advantages, SIPROTEC 4 enjoys top recognition among users worldwide. SIPROTEC 4 is the industry standard for digital protection technology today in all fields of application.

6. Engineering tools for protection

From Planning to Engineering up to Testing

The engineering tools assists you in your workflow from planning to operation of your systems with SIPROTEC and Reyrolle devices. With DIGSI 5, you have full control over the engineering. The functional scope of the tool covers all tasks – from device configuration and device setting to commissioning and evaluation of fault data with SIGRA. The SIPROTEC DigitalTwin is the real time digital replica of a physical SIPROTEC 5 device including interfaces, functionality and algorithms and enables testing of SIPROTEC 5 protection devices in the cloud. The operating and parameterization program Reydisp is used for the configuration of the Reyrolle range of protection relays. The IEC 61850 system configurator is the manufacturer-independent solution for the interoperable engineering of IEC 61850 products and systems. It supports all devices with IEC 61850.

Siemens Relay Models

A relay is an electrical control device. It is an electrical appliance that causes a predetermined step change in the controlled quantity in the electrical output circuit when the input quantity (excitation quantity) changes to the specified requirements. It has an interactive relationship between the control system (aka input loop) and the controlled system (aka output loop). Usually used in automatic control circuits, it is actually an "automatic switch" that uses small current to control the operation of large current. Therefore, it plays the role of automatic adjustment, safety protection and conversion circuit in the circuit.

The relay is an automatic switching element with isolation function. It is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment. It is one of the most important control elements.
The relay generally has an induction mechanism (input part) that can reflect certain input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); it can realize "pass" and "connection" to the controlled circuit. The actuator (output part) controlled by "break"; between the input part and the output part of the relay, there is an intermediate mechanism (driving part) for coupling and isolating the input quantity, functional processing and driving the output part.
As a control element, in summary, the relay has the following functions:
1) Expanding the control range: for example, when the control signal of a multi-contact relay reaches a certain value, it can simultaneously switch, break, and connect multiple circuits according to different forms of the contact group.
2) Amplification: For example, sensitive relays, intermediate relays, etc., with a very small amount of control, can control very large power circuits.
3) Comprehensive signal: For example, when multiple control signals are input to the multi-winding relay in the prescribed form, after a comparative synthesis, the predetermined control effect is achieved.
4) Automatic, remote control and monitoring: for example, the relay on the automatic device together with other electrical appliances can form a program control circuit to achieve automatic operation.

Classification:
1. Classified according to the working principle or structural characteristics of the relay:
1) Electromagnetic relay: an electrical relay that works by using the suction force generated by the current in the input circuit between the electromagnet core and the armature.
2) Solid relay: refers to a type of relay in which input and output are isolated by electronic components performing their functions without mechanical moving parts.
3) Temperature relay: a relay that acts when the outside temperature reaches a given value.
4) Reed relay: a relay that is sealed in a tube and has a double action of an electric reed and an armature magnetic circuit to open, close, or switch circuits.
5) Time relay: when the input signal is added or removed, the output part needs to be delayed or limited time to close or open its controlled line relay until the specified time.
6) High-frequency relay: It is a relay with minimum loss for switching high-frequency and RF lines.
7) Polarized relay: a relay that has a combined action of polarized magnetic field and control current through the magnetic field generated by the control coil. The action direction of the relay depends on the direction of the current flowing in the control coil.
8) Other types of relays: such as optical relays, acoustic relays, thermal relays, instrument relays, Hall effect relays, differential relays, etc.

2. Classification according to the external dimensions of the relay:
1) Miniature relays: relays with the longest side dimension not greater than 10 mm.
2) Ultra-compact miniature relays: relays with the longest side dimension greater than 10 mm, but not greater than 25 mm.
3) Miniature relays: relays with the longest side dimension greater than 25 mm, but not greater than 50 mm.

Siemens Relay Models

3. According to the load of the relay:
1) Micropower relay: when the open circuit voltage of the contact is DC 28V, the (resistive) relay is 0.1A and 0.2A.
2) Weak power relay: when the contact open circuit voltage is DC 28V, (resistive) is 0.A, 1A relay.
3) Medium power relay: When the open circuit voltage of the contact is 28V DC, the (resistive) relay is 2A and 5A.
4) High-power relay: When the open-circuit voltage of the contact is 28V DC, (resistive) is a relay of 10A, 15A, 20A, 25A, 40A ...

4. According to the protection characteristics of the relay:
1) Sealed relays: Welding or other methods are used to seal the contacts and coils in the cover, isolated from the surrounding medium, and have a lower leakage rate.
2) Enclosed relay: a relay that protects the contacts and coils by sealing (unsealing) with a cover.
3) Open relays: relays that protect against electric shock and coils without a protective cover.

Main effect:
The relay is an automatic switching element with isolation function. It is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment. It is one of the most important control elements.
The relay generally has an induction mechanism (input part) that can reflect certain input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); it can realize "pass" and "connection" to the controlled circuit. The actuator (output part) controlled by "break"; between the input part and the output part of the relay, there is an intermediate mechanism (driving part) for coupling and isolating the input quantity, functional processing and driving the output part.
As a control element, in summary, the relay has the following functions:
1) Expanding the control range: for example, when the control signal of a multi-contact relay reaches a certain value, it can simultaneously switch, break, and connect multiple circuits according to different forms of the contact group.
2) Amplification: For example, sensitive relays, intermediate relays, etc., with a very small amount of control, can control very large power circuits.
3) Comprehensive signal: For example, when multiple control signals are input to the multi-winding relay in the prescribed form, after a comparative synthesis, the predetermined control effect is achieved.
4) Automatic, remote control and monitoring: for example, the relay on the automatic device together with other electrical appliances can form a program control circuit to achieve automatic operation.

The technical parameters of the main products of the relay:
①Rated working voltage: refers to the voltage required by the coil when the relay is working normally. Depending on the type of relay, it can be either AC voltage or DC voltage.
② DC resistance: refers to the DC resistance of the coil in the relay, which can be measured by a multimeter.
③ Pull-in current: refers to the minimum current that the relay can produce pull-in action. In normal use, the given current must be slightly greater than the pull-in current so that the relay can work steadily. As for the working voltage applied to the coil, generally it should not exceed 1.5 times the rated working voltage, otherwise it will produce a larger current and burn the coil.
④Release current: refers to the maximum current of the release action of the relay. When the current in the pull-in state of the relay is reduced to a certain level, the relay will return to the unenergized release state, and the current at this time is much smaller than the pull-in current.
⑤ Contact switching voltage and current: refer to the voltage and current allowed by the relay. It determines the size of the voltage and current that the relay can control. It cannot exceed this value when used, otherwise it will easily damage the contacts of the relay.

Siemens Relay Models

The relay is also called "magnetic attraction" by some old electricians. It uses the action of the electromagnet to control the attraction or disconnection of another circuit. Inside the electromagnetic relay, there is a coil, iron core, spring, contact Point and other key accessories to compose. The contact generally has a normally open contact and a normally closed contact. Both often have a common terminal. When the coil is not energized, the normally closed contact and the common terminal are short-circuited, and the normally open contact and the common terminal are open. After the coil is energized, the normally open contact and the common terminal are short-circuited, and the normally closed contact and the common terminal are open circuit, which is just reversed, so that the voltage (current) of the coil can be controlled to control the circuit of the contact in series Already working.

When designing, choose the appropriate contact capacity and the voltage of the coil (AC and DC), so that the isolation control of the two circuits can be achieved. For example, the button that can be designed for human contact is 12 volts, and the 12 volt coil is selected. It is safer, even if the person encounters the voltage of the coil, he will not be charged to himself. On the contact side, you can control the voltage of 220 volts or higher to directly drive the start and stop of devices such as motors or other loads with relatively large currents, which can achieve the control effect of "four or two dials."

First, the classification of the relay is a kind of electrical circuit (such as voltage, current, etc.) or non-electrical quantity (such as heat, time, pressure, speed, etc.) changes to connect or disconnect the circuit to achieve automatic control and protection of electric power Electrical equipment. The relay is generally composed of three basic parts: sensing mechanism, intermediate mechanism and actuator. The sensing mechanism transfers the sensed electrical quantity to the time mechanism, and compares it with the rated setting value. When the setting value (excessive or insufficient) is reached, the intermediate mechanism causes the actuator to act, thereby turning on or off Open the controlled circuit. There are many types of relays, which can be divided into control relays and protection relays according to the use; according to the nature of the input signal, they can be divided into voltage relays and temperature, current relays, time relays, speed relays, pressure relays and temperature relays; It is electromagnetic relay, inductive relay, thermal relay and electronic relay, etc .; it can be divided into instantaneous relay and delay relay according to action time.

2. The working principle and characteristics of the relay 1-1 The working principle and characteristics of the electromagnetic relay The electromagnetic relay is generally composed of an iron core, a coil, an armature, and contacts. As long as a certain voltage is applied to both ends of the coil, a current will flow through the coil, thereby generating an electromagnetic effect, and the armature will attract the iron core against the pulling force of the anti-spring under the action of electromagnetic force attraction, thereby driving the dynamic contact of the armature The point is attracted to the static contact (normally open contact). When the coil is de-energized, the electromagnetic suction will also disappear, and the armature will return to its original position under the reaction force of the spring, causing the moving contact to attract the original static contact (normally closed contact). This pulls in and releases to achieve the purpose of turning on and off the electricity. The "normally open" and "normally closed" of the relay can be distinguished in this way; the relay coil is not energized and the disconnected state is the static contact, called the "normally open contact", and the static contact in the on state is called It is "normally closed contact". 1-2 The working principle and characteristics of the thermal reed relay The thermal reed relay is a new type of thermal switch that uses thermal magnetic materials to detect and control temperature. It consists of temperature-sensitive magnetic ring, constant magnetic ring, dry reed pipe, thermally conductive mounting sheet, plastic substrate and some other accessories. The thermal reed relay does not need coil excitation, and the magnetic force generated by the constant magnetic ring drives the switching action. Whether the constant magnetic ring can provide magnetic force to the reed is determined by the temperature control characteristics of the temperature-sensitive magnetic ring. 1-3 Working Principle of Solid State Relay (SSR) A solid state relay is a four-terminal device with two terminals as the output, and an isolation device is used to achieve the electrical isolation of the input / output. Solid-state relays can be divided into AC type and DC type according to the type of load power supply. According to the switch type, it can be divided into normally open type and normally closed type. According to the isolation type, it can be divided into hybrid type, transformer isolation type and photoelectric isolation type. The photoelectric isolation type is the most in practical applications.

Siemens Relay Models

1-4 The working principle and characteristics of current relay Current relay is a relay that turns on or off the circuit according to the magnitude of the current in the coil. The coil of the current relay is connected in series in the circuit. In order not to affect the working condition of the circuit, the current relay attracts fewer coils and the wire is thick. The relay that operates when the coil current is higher than the set value is called an overcurrent relay; It is an undercurrent relay. When the overcurrent relay is working normally, the current passed by the current coil is the rated value, so the electromagnetic force generated is not enough to overcome the reaction elastic force; the normally closed contact remains closed. When the current through the coil exceeds the set value, the electromagnetic suction force is greater than The reaction spring tension, the iron core attracts the armature, the normally closed contact is opened, the normally open contact is closed, the overcurrent fine relay is mainly used for frequent and heavy load starting occasions, as short circuit and overload protection of the motor or main circuit, and the undercurrent relay Commonly used for demagnetization protection of DC motors and magnetic chucks. 1-5 The working principle and characteristics of thermal relay Thermal relay is a protection circuit that uses the thermal effect of current to switch circuits. It is used as overload protection for motors in the circuit. The working principle of the thermal relay: when the motor winding is overloaded due to overload current, the heat generated by the heating element is enough to bend the main bimetallic sheet, and the guide plate is moved to the right to push the temperature compensation sheet to rotate the push rod around the axis The head connecting rod separates the moving contact from the static contact, so that the contactor coil in the motor circuit is powered off and released, and the power is cut off, which plays a protective role. The temperature compensation sheet is used to compensate the influence of the ambient temperature on the operating accuracy of the thermal relay; it is made of the same type of bimetallic sheet as the main bimetallic sheet.

 

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