At present, there are two major categories of air-to-air applications, one is home improvement and the other is engineering. In fact, in our daily life or work place, we can see the air switch , and often can be used, but many people lack some professional knowledge when the device is open , and do not know when they buy the air switch. Which model to buy, for this reason, the editor will come to talk to you today about what the meaning of the parameters of the open specifications is. At the same time, I have prepared some methods for purchasing the open specifications .
If it were not for home decoration, you might not understand this product, although small objects also play a decisive role. The air switch is the main hub of the home power supply. Of course, its quality problems cannot be ignored. Try to choose products with guaranteed quality when buying.
The meaning of the model parameters
DZ47-60 C60
400V--4000A
DZ: Small air circuit breaker 47: Design serial number
63: the largest model of this specification C: for general lighting 40: model-A
220V / 380V: rated voltage 50HZ: rated frequency
6000: rated operating short-circuit breaking capacity-A
At present, households use the DZ series of air switches, the following models / specifications are common: C16, C25, C32, C40, C60, C80, C100, C120 and other specifications, where C represents the tripping current, that is, the tripping current, such as C16 means the trip The current is 16 amps. Generally, 2500W electric water faucet needs to use C16, and 7500W and 8500W water heaters need to use C40 air switch.
Name: C65N Model: D10 3P
C: Schneider's design serial number, miniature circuit breaker
N: breaking capacity, 6KA
D: Tripping level, 10-14 times, used for protection of high inrush current such as motor
P: series
Air switch DZ10-250 Ie = 200 where DZ stands for “automaticâ€, 10 is its design serial number, 250 is its frame rating, Ie = 200 means its rated current is 200A
Air switch DZ10-100 / 330 Ie = 60A, where 100 of 100/330 means it is a 100 amp shell. 330 is a circuit breaker for power distribution that represents a three-phase double trip.
ABB does not have a blank opening at the beginning of C. In fact, it does not matter what letter starts, because DS260-C (breaking capacity is 6KA) only represents the model of ABB electromagnetic leakage switch. The C65N only represents a Schneider breaker with a breaking capacity of 6KA (without leakage, an additional leakage protection accessory can also be added)
Open specifications :
C65N 1P-: C1A C2A C4A C6A C10A C16A C20A C25A C32A C40A C50A C63A C65N 2P-: C1A C2A C4A C6A C10A C16A C20A C25A C32A C40A C20A C32A C20A -: C1A C2A C4A C6A C10A C16A C20A C25A C32A C40A C50A C63A C65N 1P-: D1A D2A D4A D6A D10A D16A D20A D25A D32A D40A D50A D63A C65N 2P-: D1A D2A D4A D6A D2A D4A D4A D2A D4A D2A D4A D2A D4A D6A D1A D2A D4A D6A D10A D16A D20A D25A D32A D40A D50A D63A
The model increase is generally 6, 10, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 150, 225, 400.
D stands for power and C stands for lighting.
At present, households use DZ series air switches (small circuit breakers with leakage protection). The following models / specifications are common: C16, C25, C32, C40, C60, C80, C100, C120 and other specifications, where C represents the trip current , That is, the take-off current, for example, C32 indicates that the take-off current is 32 amps. Generally, C32 is used to install 6500W water heaters, and C40 is required to install 7500W and 8500W water heaters. Common models in industry are: DW and DZ types for power circuits are divided into 20, 32, 50, 63, 80, 100, 125, 160, 250, 400, 600, 800, 1000 ... (Unit A).
The rated current of open circuit breaker is several amperes to several hundred amperes, such as 10 amperes and 600 amperes, but the maximum current of ordinary DZ47-63 series is 63 amperes, divided into 5 10 16 (15) 20 25 32 (30) 40 50 60 (63) seems to have 3A and 2.5A.
How to choose the model of open circuit
The MCB is used as a main power protection switch or a branch line protection switch in household power supply. When a short circuit or overload occurs in a residential circuit or household appliance, it can automatically trip and cut off the power supply, thereby effectively protecting these devices from damage or preventing accidents from expanding; households generally use two-pole (ie 2P) air switches for total power protection. Use single pole (1P) as branch protection; if the rated current of the air switch is too small, the air switch is likely to trip frequently, causing unnecessary power outages. If the selection is too large, the expected protection effect will not be achieved, so home improvement Air switch, it is important to choose the rated capacity current correctly. General small air switch specifications are mainly divided by rated current 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, etc. So how does the general family choose or verify the total value of the total load current?
1. First calculate the value of each branch current
Pure resistive loads, such as light bulbs, electric heaters, etc., can be obtained by directly dividing the indicated power by the voltage. The formula I = power / 220v; for example, 20w bulb, the branch current I = 20W / 220 = 0.09A. Electric fans, electric irons, electric blankets, electric water heaters, electric heaters, rice cookers, electric frying pans, vacuum cleaners, air conditioners, etc. are resistive loads.
The calculation of inductive loads, such as fluorescent lamps, TV sets, washing machines, etc. is a little complicated, and the power consumption must be considered. The specific calculation must also consider the power factor. For easy estimation, the author gives a simple calculation method, that is, general inductive loads Note that the calculated power of the load can be doubled. For example, the branch current of a 20W fluorescent lamp I = 20W / 220v = 0.09A, the doubled value is 0.09A * 2 = 0.18A (more than the calculated value of 0.15A, 0.03A more).
2. The total load current is the sum of the branch currents
Knowing the branch current and the total current, you can choose the specifications of the branch air switch and the main brake air switch, the main fuse, the main electricity meter, and the wires of each branch, or verify whether the specifications of these designed electrical components meet the safety requirements.
3. In order to ensure safety and reliability, the rated working current of electrical components should generally be greater than 2 times the maximum load current required
In addition, when designing and selecting electrical components, it is also necessary to consider the possibility of an increase in the electrical load in the future, leaving room for future demand.
About open space above specification model parameters mean and how to choose the open space of standard models for everyone brief introduction here, I hope the above information to be helpful. Only when you understand the specifications and parameters of the air switch can you buy a suitable one. In addition, if there is a power failure or trip in daily life, the air circuit breaker must be checked first. Finally, thank you all for reading.
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