Laptop Charger 90 Watt 19V 4.74A

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Loading Port:: China Main Port

Payment Terms:: TT or LC

Min Order Qty:: 100 Pieces pc

Supply Capability:: 80000 Pieces per Month pc/month

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Features of 90W Laptop Charger 19V 4.74A 5530:

1.Applicable to 19V 4.74A.

2.Applicable to 5.5*3.0mm DC connector.

3.Be with light or not.

4.Applicable to 2holes or 3holes charger.

5.A paper case + a bubble or static electricity bag.

6.This is 6th year of goodwill.

Q: What type of low voltage transformer should be adopted for safety lighting power supply?: We have produced many low voltage lighting transformers, such as outdoor waterproof, high-power stage lighting, as well as indoor small power transformers, customer response, but also good! For example, Guangzhou Color Art Lighting Co., Ltd., before them, our reputation is good!

Q: Why is the two side of the lighting transformer grounded?: Neutral grounding of three-phase transformer is called working earthing: the main function is to strengthen the stability of low-voltage system potential, and to reduce the risk of overvoltage caused by grounding, high voltage, short circuit, etc..

Q: How to use digital multimeter to detect the quality of 36 volt low voltage lighting transformer?: If there is no painting can be used with a diode symbol file (measuring probe connected to the capacitor to hear a sound if the table does not ring at the table and then the general display is 1, then the pen on the emergence of the phenomenon that the capacitance is still good. If one table has been ringing that received the capacitor capacitor breakdown is broken)

Q: 3 24V100W lights, I need to use a large capacity transformer (220V change 24V)?: The quality of transformer itself, coupling coefficient, overload capacity, as well as the impact current of the bulb, filament, cold resistance and simultaneous startup factor, it is better to choose the 400VA transformer

Q: How many A leakage protection switches are used in 5000VA lighting transformers?: Line lighting transformer is suitable for AC circuit of 50~60 (Hz). It is widely used in electronic industry or industrial and mining enterprises, mechanical equipment, general circuit control power supply, safety lighting and indicator light power supply.

Q: Does the lighting work properly? Doesn't that power equipment start voltage unstable?: The transformer that power supply company manages, it is to supply motive power and illumination generally, namely the lighting transformer that does not have special illumination to illuminate. Units of their own transformers, is generally the case. The utility model has the advantages that the transformer and other equipment can be fully utilized, the efficiency is high, and the external power supply circuit does not need to be divided into power transmission lines and lighting circuits, and is simple and orderly, and the cost is low. As for the price of electricity, it is usually negotiated a power and lighting each percentage of the electricity to calculate and receive.

Q: Why the 21 lighting transformer must double winding type safety isolating transformers, prohibited the use of autotransformer.: Double winding type safety isolating transformer load end and the power supply terminal is not connected, is safe, and autotransformer primary winding of a share, it is directly connected with the power supply end of the power, not safety.

Q: Power and lighting transformers, lighting quality will be affected much?: The bulb adopts a luminous two stage tube combined lamp holder, and the calculation process is very complicated. The secondary voltage is different in different combinations. Because it is a direct current ignition, but also consider the efficiency of its rectifier, but the total power is unchanged.

Q: Please tell me how to calculate the transformer in the lighting circuit of elevator shaft in building electrical design: The previous elevator hoistway lighting required the 36V safety voltage, and you can see how many power lamps are required for the hoistway, and select the transformer

Q: How to calculate the rated capacity of small transformers for lighting purposes?: But in fact, consider the total load, the importance, the location of the machine, and the future additional plan, according to the following order.

We not only respond to current requirements, but we also anticipate their emerging needs. We warmly welcome customers from all over the world to contact us and establish business relationships for a better future.

1. Manufacturer Overview

Location	Shenzhen, Guangdong, China
Year Established	2006
Annual Output Value	US$5 Million - US$10 Million
Main Markets	North America; South America; Eastern Europe; Southeast Asia; Africa; Oceania; Mid East; Eastern Asia; Western Europe; Central America; Northern Europe; Southern Europe; South Asia; Domestic Market
Company Certifications	ceritificate of ROHS compliance; ceritificate of emc compliance; ceritificate of lvd compliance

2. Manufacturer Certificates

a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability

a) Trade Capacity
Nearest Port	Shenzhen
Export Percentage	81% - 90%
No.of Employees in Trade Department	21-50 People
Language Spoken:	English, Chinese
b) Factory Information
Factory Size:
No. of Production Lines
Contract Manufacturing
Product Price Range