Summarize
Bell transformer is applicable to circuit of AC 50Hz, operating voltage up to 250V. With output power capacity 3.8VA and 8VA, the product functions as ideal and safe power supply for household door bell
Standard
EN61558-1
EN61558-2-8
Standard
EN61558-1
EN61558-2-8
Construction features
The product is of safety insulating type. Preferable components are used and secure high performances to the product: 0.5 quality silicon steel is adopted for less non-load consumption and less noise; Special framework of the coil bobbin has high insulation level; well-designed terminal case ensures easy and firm terminal connection. The functioning part is installed in the moulded case after being insulated.
Normal operation and mounting requirement
·Circumstance temperature -5°C~ +40°C, average temperature not exceeding 35°C.
·Altitude above sea level less than 2000 m.
·Humidity not exceeding 50% at 40°C and not exceeding 90% at 25°C.
·Installation class II or III.
·Pollution class 2.
·Installation method DIN Rail mounting type.
·The external magnetism shall not be more than 5 times of terrestrial one.
·Product shall be installed vertically at the place where there shall be no severe impact and vibration. The product is switched on when the handle is at upper position.
·Altitude above sea level less than 2000 m.
·Humidity not exceeding 50% at 40°C and not exceeding 90% at 25°C.
·Installation class II or III.
·Pollution class 2.
·Installation method DIN Rail mounting type.
·The external magnetism shall not be more than 5 times of terrestrial one.
·Product shall be installed vertically at the place where there shall be no severe impact and vibration. The product is switched on when the handle is at upper position.
Main technical parameters
|
Type
|
Rated Output Power P2(VA)
|
Rated Voltage
|
No-load current I 0 ( A)
|
No-load losses P 0 (W)
|
Coil Temperature Rising Δτm(℃)
|
|
|
Primary U1(V)
|
Secondary U2(V)
|
|||||
|
BT-3.8
|
3.8
|
230(240)
|
12
|
0.011
|
0.5
|
30
|
|
16
|
||||||
|
24
|
||||||
|
BT-8
|
8
|
230(240)
|
4
|
0.032
|
0.9
|
45
|
|
6
|
||||||
|
8
|
||||||
|
10
|
||||||
|
12
|
||||||
|
16
|
||||||
|
24
|
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