Resistance Box

Description of resistance box:

Our factory produces theresistor cabinet that endure voltage (20-150)KW,power 5-100KW,resistance 100O-1000KO,compulsory wind-cold .It has been used extensively in the high voltage equipments of the metallurgy and the underground,high voltage testing ,voltage measuring .The performance isstable.Which have received a lot of praise from our users

Applications scope of resistance box

Mainly used in: scientific research institute, national technology academy, university teaching and research section, the electronic power & energy department and all kinds of electric power enterprise, science-and-technology enterprise, enviromental protect enterprise; 

FAQ

1. How to choose the resistor ?
1 We would like to commend the wirewound resistor for you when it will be used in low voltage(220v-3.5kv).
2 It is better to use glass glaze resistor in high voltage(above 5.0kv).
3 For high-frequency circuits,to recommend oxide film resistor or glass glaze resistors.The resistance of the structure body,determines that it has a low inductance.There are requirements on the circuit inductance,film resistor is your best choice.

2. Resistor structure model and parameters characteristics ?
2.1 Glass Glaze Resistor:It is extremely stable chemical properties resistor paste coated on 95%AL2O3 ceramic tube,high temperature resistance film formed after firing.In order to guarantee stable electrical performance parameters,the surface to be coated with a protective lacquer.Its characteristics:
Resistance Range:O--G O
Power Range:0.5--500W
Frequency Response:less oxide film resistor ideal,but much better than wire wound resistors.(Called non-inductive resistor)
2.2 Oxide Film Resistor:It is the liquid chemical reagent injected into the high pressure borrow about 800°C 95%AL2O3 ceramic tube,in the high temperature generated in the resistive film.Surface without protective lacquer coating.Its characteristics:
Resistance Range:1 O --5K O
Power Range:10W--500W
Frequency Response:=100MHz Truly non-inductive resistor
2.3 Wire Wound Resistor:Alloy resistance wire is wound on an insulating substrate for the endurance temperature,the surface protective layer coating made of resistive components.Because the different of the coated and package,it can divided into paint type,glaze type,metal shell type,porcelain shell type.Its characteristics:
Resistance Range:0.15 O --20K O
Power Range:1W--500W
Frequency Response:inability to completely eliminate inductive factors,the frequency characteristics of the worst of the three resistors

3.High voltage resistors abide by electronics basic formula yet Using in the equipment circuit ?
Ohm Law
V=IR
Here:
I-Flowed Resistor Current,Dimension:A.
V-Voltage Exerted Resistor,Dimension:V.
R-Resistor’s Resistance,Dimension: O

4. How to choose the resistor power?
Power is larger (= 20W) of the load resistor at full power for a long (more than 2 hours) work surface will produce 300°C temperature of around. And safe use of the resistor surface temperature is preferably maintained at less than 200°C. Therefore, when the choice of the resistor, reduced power in using should be considered.