Laptop Charger 90 Watt 19V 4.74A

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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.

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Q:The difference between lighting transformers and control transformers
A control transformer is a low voltage appliance, usually used as a power supply or part of a lighting for the control of electrical equipment such as machine tools. There are usually two different voltage outputs,
Q:How is the lighting power of the 380V transformer calculated?
Special transformer power transformer (electric furnace transformer, rectifier transformer, power frequency test transformer, voltage regulator, transformer, audio, mine variable frequency transformers, high frequency transformer, transformer, instrument transformer, impact power transformer, reactor, mutual inductor etc.) circuit with T symbol number. For example: T01, T201 etc.
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.
Q:Why should lighting transformers be used in factories and mines?
In some factories and mines (such as power plants), in order to supply power reliability, the power system is grounded in a three-phase, ungrounded, or neutral manner. In this way, the transformer must be connected to a neutral grounding type with a special transformer to supply power to the lighting.
Q:Is the substation separate from the power and illumination transformer?
There is only bus in the substation, and the station is connected with the transformer from the bus. If there is no electricity even in the bus, then the substation should not be considered active.
Q:Why the 21 lighting transformer must double winding type safety isolating transformers, prohibited the use of autotransformer.
Double winding type safety isolating transformer is provided with two windings respectively as input and output (primary) winding (secondary) winding, and between the two windings are insulated from each other, only through the magnetic connection to the power supply, which is the secondary winding and the earth does not constitute a loop, if the use of additional electrical insulation, it should be safety isolating transformer.
Q:Line lights, lighting transformers in use!! Can live line work?!! Be afraid of electric shock 40
What you think? Your light is 220V, right. Over 36V, it's better not to live with electricity unless there is good protection
Q:How many 40W bulbs can be brought into the 1000VA lighting transformer?
Connect 220V method, FireWire 220V terminal, zero line 0 terminal, 380V terminal is not connected.Connect 380V method, A phase 380V terminal, B phase 0 terminal, 220V terminal is not connected.
Q:Why can't autotransformer be used as transformer for safety lighting?
The main and auxiliary coils of the autotransformer have common parts. Once the short-circuit is made, the lighting circuit is directly connected with the high voltage circuit, which is very dangerous
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.
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

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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  
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Contract Manufacturing
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