Air switches are a must-use thing in everyone’s home, but when you go to the hardware store, there are more large and small switch sockets, which is dazzling. How to choose? There are various letter models in the empty opening, what do these letters mean?
In general:
D stands for power, and C represents trip current, that is, jumping current.
（1）
Household air opening is basically DZ, with leakage protection, common are the following models/specifications: C16, C25, C32, C40, C60, C80, C100, C120 and other specifications.
（2）
Industrial air opening generally uses DW and DZ to represent models. There are 20, 32, 50, 63, 80, 100, 125, 160, 250, 400, 600, 800, 1000… (Unit A).
Interpretation:
For example, C32 means that the starting current is 32 amps, and C32 is generally installed for 6500W water heaters
Install 7500W, 8500W water heaters with C40 empty.
Let’s talk about a specific model: such as DZ47-60A C25
DZ47 — series miniature circuit breaker (there are many series, basically named by the manufacturer)
C—— instantaneous trip overcurrent multiplier according to the clear class, such as 5~7 or 7~10 times, D is 10~14 times for the power type
Let’s talk about what type of empty opening should be selected in a specific application:
(1) DZ5 series:
Suitable for AC 50HZ, 380V current ratings from 0.15A to 50A.
(2) DZ10 series:
Suitable for AC 50HZ, 380V or DC 220V and below circuits.
(3) DZ12 series:
It is suitable for AC 50HZ single-phase 230V circuit, mainly installed in hotels, apartments, high-rise buildings, squares, airports, railway stations and other lighting distribution boxes.
(4) DZ15 series:
It is suitable for AC 50HZ, rated voltage 380V, rated current 63A circuit.
(5) DZ20 series:
Suitable for AC 50HZ, rated insulation voltage 660V, rated voltage 380V and below, its rated current to 1250A.
(6) DZ47 series:
It is suitable for AC 50HZ/60HZ, rated working voltage of 240V/415V and below, rated current up to 60A circuit.
(7) DW15 Series:
It is suitable for AC 50HZ, rated voltage to 440V, rated working voltage to 1140V, 80V power distribution network.
(8) SCML series:
Suitable for AC 50HZ, 60HZ, 500V and below circuits.
(9) DW10 series
: Suitable for AC 50HZ, rated voltage to 440V electrical circuit.
(10) AC30 series:
The supporting electrical components suitable for modular terminal combined electrical can also be installed in other complete sets of electrical boxes to plug in electrical equipment.
（11）
H series: suitable for rated current 600A and below, AC 50HZ, rated working voltage 690V and below, DC 230V and below generally used as electrophoresis, fixed current 225A and below air switch, can be used as line and infrequent conversion and motor infrequent starting.