Siemens APT - LW39 series 10,000 revolutions FAQ

1) Electromagnetic relay: an electrical relay that works by using the suction force generated by the circuit in the input circuit between the electromagnet core and the armature. 2) Solid relay: refers to a kind of relay in which electronic components perform their functions without mechanical motion components, and the input and output are isolated. ...

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. ...

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...

1. The inspection basis for whether the current transformer is damaged: 1. The basis for checking whether the polarity is damaged: The primary winding of the current transformer is marked P1 and P2, and the secondary winding is marked as S1 and S2. If P1 and S1 are the same name, then this sign is called reduced polarity. Primary current from P1 ...

(1) Miniature relay: the longest side of the relay is not more than 10 mm. (2) Ultra-miniature relay: the longest side size is greater than 10 mm, but not more than 25 mm. (3) Small miniature relay: the longest side size is greater than 25 mm, but not large...

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.

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 ...

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 ...

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 ...

There are several types of pushbutton switches: Pushbutton switches can be classified according to the way they are protected and how they are operated. It can be divided into open type and protected type, as well as waterproof type and anti-corrosion type, etc. And explosion-proof, knob-type, key-type, emergency-type, are also its ...

1. Structural characteristics of AC relays The coil of the AC relay is shorter, and the wire diameter is thicker, mainly because the coil is passed through the alternating current, the reactance is larger, and the thick wire diameter can reduce the internal resistance and reduce the heat generation.

1. Visual inspection method: observe the appearance of the relay by the naked eye, check whether it is damaged or deformed, observe whether the contacts are tightly contacted, and whether there are copper slag and other substances attached to the contacts. 2. Parameter detection method: use test instruments to detect the parameters of the relay, such as: ...

(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 ...

(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 ...

First, the principle of primary parameter selection of current transformer The rated primary current of the current transformer is determined by the actual load of the tested circuit, and the rated primary current of the current transformer should not be less than the rated primary current of the circuit.

Seeking advanced, perfect and excellent Xijia APT to concentrate on research and development, and constantly change customs, the launch of the metal flat button indicator FM series is to complete the perfect integration of appearance and performance. Ultra-thin flat round device, metal shell and buttons, high-value appearance Product ...

Tianjin is a typical industrial city. Due to the steady progress of "three districts and one base", the advanced manufacturing industry has developed rapidly in recent years. Siemens APT brought a variety of low-voltage control products to the 14th China (Tianjin) International Industry Fair held from March 15-18. Siemens APT has launched the PB1...

1. The simplest and most effective way is to use a new solid state relay. 2. The other is to determine the voltage of the coil to avoid the voltage provided by the coil being less than the operating voltage. 3. Check whether the polarity is reversed. 4. Reasonable power-on time for the solid state relay coil, if ...

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; ...

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 ...