APT Information SHOW

	Siemens APT Relays - What are the relays that burn out? 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 ...
	Siemens APT current transformer – wiring method of current transformer 1. The single wiring mode can only feedback the status of single-phase current. 2. Three-phase complete star wiring, usually used in transformer differential protection wiring. 3. The two-phase incomplete star wiring method is used frequently in daily work. 4. The two phases ...
	Siemens APT current transformer - what need to be paid attention to in the use of current transformer 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 ...
	Siemens APT current transformer - how to choose a current transformer? 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.
	Siemens APT current transformer - common faults and solutions of current transformers 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.
	Siemens APT Current Transformers – How to view current transformers 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 ...
	Siemens APT current transformer - how to see the multiple of the current transformer 1. Most of the multiple values can be seen from the nameplate attached to the instrument, which will show the style of the value/value, which can be known by dividing the previous value by dividing the back value when calculating the standard core-piercing turns. If the actual number of turns of the grommet does not conform to the standard, then the multiple should be ...
	Siemens APT current transformer – the basis for whether the current transformer is damaged or the measurement is inaccurate 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 ...
	Siemens APT current transformer – the difference between the ratio on a current transformer and the ratio on a watt-hour meter 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 ...
	Siemens APT Relays – Functions of High Voltage Relays 1. Control switch: The high-voltage relay can open or close the high-voltage circuit to achieve the purpose of controlling the work of the equipment. 2. Protection circuit: The high-voltage relay can monitor the current, voltage, temperature and other parameters inside the high-voltage circuit, and automatically cut off the circuit when the circuit is abnormal.
	Siemens APT Relays – a commonly used detection method for high and low voltage relays 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: ...
	Siemens APT relay - the main structural features of high and low voltage relays 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 ...
	Siemens APT Relays – The action of high and low voltage relays and how to adjust the low voltage side 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.
	Siemens APT relay - the cause and solution of the fault of the high-voltage relay 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 ...
	Siemens APT Relays – Selection Principles for High Voltage Relays 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.
	Siemens APT Relays - Installation Precautions for High and Low Voltage Relays 1. Choose the right relay: When choosing a high and low voltage relay, you should choose the right product according to your needs, such as selecting according to the rated voltage, current and other information 2. Installation location: high and low voltage relays should be installed in dry, ventilated, non-corrosive gas, less dusty areas, ...
	Siemens APT Relays - What are the classifications of high and low voltage relays? 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. ...
	Siemens APT relay - the main structural features of high and low voltage relays 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 ...
	Siemens APT Relays - High Voltage Relay Fault Causes and Solutions 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 ...
	Siemens APT Relays – Maintenance of high-voltage relays 1. Regular cleaning: The relay needs to be cleaned regularly with dust and dirt to keep its surface clean and smooth. It can be cleaned with a clean cloth or brush, and detergents containing acids and bases should be avoided. 2. Check the wiring: The wiring of the relay needs to be fastened firmly, and the contact ...
	Siemens APT relay - common faults and solutions for high-voltage relays 1. Poor contact Poor contact is one of the most common faults in high-voltage relays, which can lead to problems such as hot terminals ® and burned contacts. Workarounds include regularly checking terminals and set screws for loose and cleaning contact surfaces. 2. Excessive wear At...