Oil is considered a primary product as it is extracted directly from natural resources such as crude oil reserves. Secondary products are derived from primary products through further processing or manufacturing. Oil can be refined into secondary products like gasoline, diesel, and jet fuel.
primary- PV valves; secondary - PV breaker
The Primary industries in the UAE are oil extraction,tourism and the service industry while the secondary ones are the banking industry, construction and real-estate.
Primary Means, it is individual there is no dependence, But Secondary will allays depends on Primary, If you want to do Secondary, you should complete primary first, There is no precondition to primary, but for Secondary Primary is the Precondition, first you should do primary, then only you are able to do secondary.
primary and secondary demand
Voltage on primary/Primary turns = Voltage on secondary/Secondary turns
primary and secondary coilsAnswerPrimary and secondary windings.
Primary is IgM and secondary is IgG
secondary
Secondary
From Hanes Manual: Diamond: Primary .97-1.18 ohms Secondary 11.3-15.3 K-Ohms Diamond (oil filled) Primary 1.34-1.55 ohms Secondary 15-19 K-Ohms Essex Primary 1.34-1.55 Ohms Secondary 9-12.2 K-Ohms Prestolite Primary 1.34-1.55 Ohms Secondary 9.4-11.7 K-Ohms Toyodenso Primary .95-1.2 Ohms Secondary 11.3-13.3 K-Ohms
The current in the secondary when the voltage is twice the primary will be one half of the primary. The current in the primary when the voltage is twice the secondary will be twice the secondary.