Siemens APT Relays – classified by their operating principle or structural characteristics

1. What are the installation methods of PB1 button? PB1S and PB1L are fastened with metal screws, and PB1J and PL1 are fastened with plastic nuts. 2. PB1 series pushbuttons can be assembled with up to several sets of contact modules as standard 2*3=6 3. PB1S shell ...

1. First of all, solid-state relays have a long service life and strong reliability. The solid state relay corresponds to the CDG1 series delicacy. This solid-state relay has no mechanical parts and solid-state devices to complete the contact function. Since the parts do not move, they can work in high shock and vibration environments. Because...

1. Standardize current transformer: the top of the transformer verification is used as a standardizer, and the accuracy is usually more than two grades higher than that of the tested. 2. Load box: imitate the practice operation status of the tested transformer. 3. Transformer ...

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 ...

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...

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.

1. Electrical parameter matching: The rated voltage and current of the high-voltage relay need to match the circuit demand, too small will lead to the failure of the switch, too large will waste the cost. 2. Mechanical parameter adaptation: the external dimensions, pin arrangement and wiring mode of the high-voltage relay need to be adapted to the actual installation ring.

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. The position of the auxiliary contact is not suitable. After the switch has been tripped, the mechanical part has moved, worn phenomenon, resulting in the auxiliary contact position offset to the correct position, in the protection action tripping, when the auxiliary contact is not disconnected, the outlet electrical appliances, electrical appliances, relays have returned, and it is ...

1. There is an abnormal noise or over-temperature of the iron core Cause of failure: When the current transformer is in operation, if there is an open circuit or overload in the secondary circuit, it will lead to abnormal sound and over-temperature of the core.

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 ...

1. The reason for the frequent disconnection of the coil: whether the solid state relay is cleaned with ultrasonic, whether the coil is overvoltaged, etc., will cause the coil to be disconnected. 2. The reason for the insufficient power supply of the coil: First, it is necessary to confirm the voltage of the solid state relay coil. If the voltage supplied to the coil is lower than ...

1. The secondary side of the current transformer shall not be open when working. 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. 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. 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 ...

1. Multi-tap current transformer. The primary winding remains unchanged, and when winding the secondary winding, several taps are added to obtain a plurality of different transformation ratios. For example, two taps are added to the secondary winding, K1 and K4 are 800/1A, K1 and K3 are 600/1A, and K1 and K2 are 400/1A, that is, the transformation ratio is 400-600-800/1A...

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 ...

According to the principle of action, it is divided into: 1. The rectifier relay is used in the AC circuit, and its electromagnetic system, contact system and action principle are the same as those of the DC stepless relay. 2. Transistor relay: Transistor relay is composed of transistor transmitter or zero indicator, logic relay, transistor relay.

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: ...

Solid state relays consist of three parts: the input circuit, the isolation (coupling), and the output circuit. Input circuitry According to the different categories of input voltage, the input circuit can be divided into three types: DC input circuit, AC input circuit and AC and DC input circuit. Some input control circuits are also ...