Siemens APT current transformer - how to see the multiple of the current transformer

1. Which series of metal buttons can produce two-color buttons with light? FM25N 2. Which series can produce knobs? FM-N series 3. Which type of metal illuminated button needs an external resistor for step-down? FM16E 4. What is the material of the shell ...

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 ...

On May 8, 2019, APT held a grand online conference in Shanghai, Beijing, Guangzhou, Nanjing, Changsha and Tiantai...... and more than 20 cities across the country witnessed the new Siemens APT x. The new product of R series relay was released. ...

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) 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. 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. 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. First of all, there is a general understanding of the knowledge of the limit switch, which is usually composed of a shell, an interconnection system and an operating head. 2. First of all, the limit switch should be set to the desired location, and then connected, in addition, it is necessary to figure out the meaning of different letters, such as NC for the long ...

Classified according to the working principle or structural characteristics of relays: 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 state relay: refers to the electronic components that perform their functions without mechanical ...

(1) Rated 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. ...

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 ...

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.

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. ...

(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...

1. When selecting the solid-state relay used in the printed circuit board with small current specifications, because the lead terminal is made of high thermal conductivity material, the soldering should be carried out under the condition that the temperature is less than 250 °C and the time is less than 10S.

1. Some common faults of high-voltage relay coils 1. The common fault cause of the coil is often disconnected: whether the ultrasonic wave is used to clean the high-voltage relay, or whether the overvoltage is added to the coil will also promote the probability of the coil being disconnected. 2 ...

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 ...

The excitation current is the main cause of the error of the current transformer, so reducing the excitation current can reduce the error (1) The core is made of materials with high permeability, because the magnetic properties of the core not only affect the ratio difference and angular difference, but also affect the saturation multiple. (2) Increase the cross-section of the iron core and shorten the magnetic circuit.

1. The influence of the ambient temperature The load capacity of the solid state relay is greatly affected by the ambient temperature and its own temperature rise, during the use of the device, it should be ensured that it has good heat dissipation conditions, the rated working current of more than 10A products should be equipped with radiators, and the products above 100A should be dissipated.

LED warning light function 1. The luminous method selection items are: solid light, shiny, burst flash, constant/shiny mix. 2. The installation base is: L rod, straight rod, folding, and barrel type. Effect of LED warning light_Effect in different scenes 1. Construction unit On the road ...