Introduction to the characteristics of Siemens APT ZY2 miniature relay

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.

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.

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 ...

(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 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.

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. 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 ...

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 ...

1. The resistive load should not exceed 60% of the rated current; 2. Overcurrent and load short circuit may cause permanent failure of the internal thyristor in SSR, so it is necessary to install a fuse or air switch, and a fuse can be used if the capacity is small; 3、 ...

1. Overhaul of the sensing mechanism For electromagnetic (voltage, current, intermediate) relays, the sensing mechanism is the electromagnetic system. The faults of the electromagnetic system are mainly concentrated in the coil and the moving and static iron cores. (1) Coil fault maintenance Coil failure usually has a coil absolute...

(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 ...

Categorized by use According to different uses, current transformers can be roughly divided into two categories: Current transformer for measurement (or measurement winding of current transformer): provides current information of the power grid to measurement, metering and other devices within the normal working current range. Protecting Electricity ...

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 ...

1. Contact failure (1) The phenomenon that cannot be disconnected due to mechanical occlusion of the contact (the needle-like protrusion and pit formed on the contact bite each other), fusion welding, or cold welding. (2) The contact wear of the relay is caused by the absence of arc extinguishing devices or measures, or improper parameter selection, ...

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) Micro-power relay: when the contact open circuit voltage is DC 28V, the (resistivity) is 0.1A, 0.2A relay. (2) Weak power relay: when the contact open circuit voltage is DC 28V, (resistivity) is 0.5A, 1A relay. (3) Medium power relay ...

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. Since the current through the AC electromagnetic relay is a changing alternating current, the magnetic flux in the magnetic circuit also changes with the alternation (sinusoidal law instead of straight line law). The suction force of the armature is varied between 0 and the maximum, so the suction of the AC electromagnetic relay is pulsating, variing.

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 ...

Overcurrent Relay (OCR) It operates when a certain value or greater of current flows through. There are two elements: overcurrent detection (known as a timing element) and short-circuit current detection (as an instantaneous element). Earth Fault Overcurrent Relays (OCGR, GR) While...

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 ...