APT Information SHOW

	Siemens APT current transformer - classification of current transformer and its function 1. Current transformers are classified according to the installation method According to the installation method, the current transformer can be divided into through-type current transformer, pillar type current transformer, bushing type current transformer, and busbar type current transformer. Through-type current transformer: used to pass through the screen or wall...
	AD16-30JC Series Combination Light FAQ 1. What are the basic combination colors of combination lights? Red, yellow, green, blue, white, bicolor. 2. What are the different types of combination light panes? F, H, L, V, G any combination 3. Is the lampshade detachable? OK 4. Combination light ...
	Siemens APT - ALS series limit switch FAQ 1. What are the installation methods of ALS limit switches? Usually the limit switch is divided into front of the board installation or board back installation, all of which are installed by screws. 2. What are the different modes of limit switch action? According to the action mode of the limit switch head, it is divided into ...
	Siemens APT – X-Series Control Box FAQ 1. The control box is made of ABS and PC, which material has better flame retardant performance? ABS has good flame retardant performance. 2. What are the certifications for the control box? 3C & CE (for unperforated control box only) 3. What is the color of the grey cabinet of the control box? Work...
	Siemens APT - ALH-0.66 series transformer FAQ 1. What is the maximum voltage that can be used for an ALH transformer? AC low voltage up to 720V 2. Is there a protective grade product for ALH transformers? II-P AND III-P are available in both protective grades 3. What is the maximum primary current of ALH transformer? The maximum primary side current is 8 ...
	Siemens apt - TL series police lights frequently asked questions 1. How many light sources are there for the TL-70 police light? There are 3 types, namely LED, incandescent and xenon. 2. What are the colors of the TL-70 police light? There are 5 types, which are red, yellow, green, blue, and white. 3. What are the types of TL-70 police lights? 3 ...
	Siemens APT Relays - Common Problems and Solutions of Relays First, the contact is loose and cracks The contact is the electrical contact part of the relay to complete the switching load, and the contact of some products is riveted and pressed, and its main drawbacks are loose contacts, cracked contacts or excessive dimensional position deviation. This will affect the contact reliability of the relay. Shovel appears ...
	Siemens APT Relays – The difference between signal relays and power relays Signal relays are used more in secondary maintenance circuit circuits. It tells the right people exactly what is wrong with the maintenance. The power relay is a bit like a discriminant sentence in mathematics. When a constant is entered, the satisfactory and unsatisfactory conditions will output different results. Merit...
	ALH-0.66 series transformer FAQ 1. What is the maximum voltage that can be used for an ALH transformer? AC low voltage up to 720V 2. Is there a protective grade product for ALH transformers? II-P AND III-P are available in both protective grades 3. What is the maximum primary current of ALH transformer? The maximum primary side current is 8 ...
	Siemens APT Relays – How to Choose the Right Power Relay 1. Measure the resistance of the contact Use the resistance level of the universal meter to measure the resistance of the normally closed contact and the moving point, and its resistance value should be 0, (the contact resistance value can be measured in a more accurate way within 100 milliohms); The resistance between the normally open contact and the moving point is infinite. From this, it can be distinguished which is a normally closed contact ...
	TL series police lights frequently asked questions 1. How many light sources are there for the TL-70 police light? There are 3 types, namely LED, incandescent and xenon. 2. What are the colors of the TL-70 police light? There are 5 types, which are red, yellow, green, blue, and white. 3. What are the types of TL-70 police lights? 3 ...
	Siemens APT current transformer – current transformer operating error When the current transformer is finalized and its internal parameters are determined, the magnitude of the error 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. ...
	Siemens APT - x.R series relays frequently asked questions 1. Does the AC control relay have surge suppression? SR/NR/PR can produce AC with surge suppression circuits 2. How many types of thermal current specifications are there for our company's relays? 3A, 5A, 8A, 10A, 12A five current specifications 3. Surge suppression back ...
	Siemens APT Pushbutton Switches - Introduction to the types of metal pushbutton switches Common types of metal button switches include self-locking switches, self-reset switches, knob gear switches, lever gear switches, locking switches, etc.; Because the metal button switch is small in size, easy to install, metal material, voltage can be used from 9-220V, and the appearance of metal texture ...
	Siemens APT current transformer - inspection content of current transformer 1. Regularly check whether the current transformer is overheated, check whether there is discoloration in the terminal, and check whether there are sundries in the terminal box. 2. Check whether there is oil leakage in the oil level gauge in time to ensure that the oil level meets the use standard and there is no oil leakage.
	Siemens APT transformer - the use, principle and selection of current transformer 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 ...
	Siemens APT transformer – common faults and analysis of voltage transformers (1) The insulation between the iron chips is damaged Problem: The temperature rises during operation. Possible causes of the problem: (1) Poor insulation between iron chips (2) The use of harsh environmental conditions or long-term operation at high temperature to promote the aging of insulation between iron chips. （ ...
	Siemens APT transformer - the use of voltage transformer and precautions The voltage transformer output is usually 100V 1. The working impedance in the secondary circuit of the voltage transformer should not be too small to avoid overload operation. 2 Before connecting the circuit, the polarity of the voltage transformer should be verified. 3 After connecting the circuit, the secondary coil should be reliably grounded, ...
	Siemens APT Current Transformer - The difference between voltage transformer and current transformer The difference between the voltage transformer and the current transformer in terms of effect principle The primary difference is that the operating conditions are very different during normal operation, and the main performance is as follows: 1) The current transformer can be short-circuited twice, but it cannot be opened; The voltage transformer can be opened twice, but it must not be short-circuited 2) ...
	Siemens APT current transformer - precautions for the use of current transformer 1. The wiring of the current transformer should not present problems, otherwise it will lead to failure to operate normally, and there may be damage to the transformer. In this case, the primary winding needs to be connected in series with the measurement circuit, and the secondary winding needs to be connected in series with all the loads. 2. Estimation ...
	Siemens APT current transformers – factors influencing the error of current transformers (1) The influence of the internal resistance R2 and leakage impedance X2 of the secondary coil on the error: when R2 increases, the specific difference and angular difference increase; As X2 increases, the specific difference increases, but the angular difference decreases. Therefore, to improve the error, R2 and the appropriate X2 value should be minimized. Due to the secondary coil internal resistance R2 and leakage ...