Siemens APT Relays – Functions of High Voltage Relays

merit 1. High life, high reliability: solid state relay has no mechanical parts, the contact function is completed by solid devices, because there are no moving parts, so it can work in a high impact and vibration environment.

1. The secondary side of the current transformer shall not be open during operation. Due to the small secondary impedance of the current transformer, the secondary side of the current transformer is close to the short circuit state during normal operation. When the secondary side is open, a high voltage will be induced, which endangers the safety of people and equipment. 2. Electricity ...

1. What is the maximum voltage that ALH transformers can use? AC low voltage up to 720V 2. Are there any protection grade products for ALH transformers? Both II-P AND III-P have protection grade products 3. What is the maximum primary current of the ALH transformer? The maximum primary side current is 8 ...

1. Differences in use The conversion ratio of the current transformer is inconsistent with the transformation ratio of the ammeter, which will lead to the inability to use the displayed value of the ammeter directly, and the proportional conversion must be carried out; If the transformer of ratio 5 is used on the meter of ratio 1, the secondary current of CT will generally exceed 1A, so that the transformer of 5 is used on a meter of 1 ratio. Than 1 ...

1. What are the current specifications of universal transfer switches? At present, there are four forms: 10A, 16A, 25A, and 63A 2. What are the positioning angles of universal transfer switches? At present, it is divided into four angles: 30°, 45°, 60° and 90° 3. There are no customers' ...

First, the solid-state relay has no contacts and coils in the structure, which can be opened and closed at a high frequency and will not produce sparks, and has a long service life; Second, the intermediate relay is generally only used for the control loop, and cannot work with load, and will make a "pop" sound when it is sucked in; ...

Conventional domestic travel switch LX19-001/111 in the LX19 series, LXK3-20S/T in the LXK3 series, JLXK1 series JLXK1-111/411/511 in the conventional travel switch are the most representative.

On April 22, 2015, the "2015 China Automation Industry Annual Conference and the 10th China Automation Industry Century Event" sponsored by the Chinese Association of Automation was held in Beijing. At the conference, APT won the "2014 Top Ten New Enterprises in China's Automation Field" award, which was awarded by APT last year.

(1) Isolation between input and output circuits; (2) signal conversion; (3) Add output circuit; (4) repetitive signal; (5) Switch between different voltage or current loads; (6) Retain the output signal; (7) Locking circuit; (8) Provide remote control ...

1. Disconnect the control power supply: Before making the low-voltage terminal contact adjustment, the control power supply should be disconnected first to avoid the current directly or indirectly passing through the relay contact, and avoid electric shock or damage to the relay. 2. Open the relay cover: Open the relay cover, you can see the inside of the relay.

1. Some common faults of high-voltage relay coils 1. Common fault reasons for the frequent disconnection of the coil: whether the use of ultrasonic waves to clean the high-voltage relay, or the addition of overvoltage to the coil will also promote the probability of the coil disconnecting. 2 ...

Seeking advanced, perfect and excellent Xijia APT has devoted itself to research and development, constantly changing customs, and the metal flat button indicator FM series launched this time has completed the perfect integration of appearance and performance. Ultra-thin flat circular device, metal casing and buttons, high-value appearance Product ...

1. What is the maximum voltage that ALH transformers can use? AC low voltage up to 720V 2. Are there any protection grade products for ALH transformers? Both II-P AND III-P have protection grade products 3. What is the maximum primary current of the ALH transformer? The maximum primary side current is 8 ...

When the current transformer is shaped and its internal parameters are determined, the error size will be affected by the secondary current (or primary current), secondary load, power factor and frequency. These factors are called external factors, and the error of the current transformer in operation is mainly affected by these four factors. ...

The principle of the current transformer is based on the principle of electromagnetic induction. A current transformer is composed of a closed core and windings. Its primary side winding turns are very small, string in the line of the current that needs to be measured, so it often has all the current of the line flowing through, the number of turns of the secondary side winding is relatively large, and the series ...

1. Electromagnet: The electromagnet of high and low voltage relay is usually composed of two parts: coil and core. When the high and low voltage relay inputs the electrical signal, the electromagnet coil will generate electromagnetic force, drive the iron core, and realize the on/off control of the relay. 2. Contact group: The contact group is a high and low voltage relay control ...

1. What are the installation methods of ALS limit switches? Usually the limit switch is divided into front-board installation or post-board installation, both of which are screw-mounted. 2. What are the different operating modes of limit switches? According to the action mode of the limit switch head, it is divided into ...

Track protection relay A protection relay that works mainly due to accidents that occur in transmission lines. When this method works, the circuit breakers at both ends of the faulty line will be disconnected. Busbar protection relay A type of protection relay, mainly due to power plants or transformers.

1. Types and series of relay selection First, the type of relay is selected according to the working requirements of the controlled or protected object, and then the appropriate series is selected according to the sensitivity or accuracy requirements. When choosing a series, you should also pay attention to the matching of the relay with the system. (1) ...

1. How many light sources does the TL-70 police light have? 3 types, namely LED, incandescent lamp and xenon lamp. 2. What are the colors of TL-70 police light luminous parts? 5 types, namely red, yellow, green, blue, and white. 3. What are the different types of TL-70 police lights? 3 ...