300W Enamelled High Power Wirewound Resistor Tubular Inverter Braking Resistor
300W Enamelled High Power Tubular Wirewound Braking Resistors
Structure
1.A tubular ceramic has two terminals,and is wound with copper wire or chrominum alloy wire to provide the resistance,then the surface coated with high temperature glaze.After the semi-finished resistor cool and dry,insulation is applied through a temperature process and then the mounts are attached.If made into wave-type,not only eliminate the parasitic inductance of the resistor,but also improve the heat dissipation.
2.The tubular core is of special ceramic,capable of withstanding high thermal shock and overload of short duration.
3.Surface Colour:enamel green.
4.The tubular core is of special ceramic,capable of withstanding high thermal shock and overload of short duration.
Features
1.Fixed or Variable Type are available.The surface layer is enamel,with firm structure,strong pollution resistance,chemical gas erosion resistance,high insulation,moisture resistance & high temperature resistance,used in harshenvironments.
2.Surface glazed,won't be easily polluted or eroded by chemistry gas,high insulating capacity,canresist humidity and heat well,can be used in the atrocious environment.
3.Small size,high power rating,good overload and heat durability capacity,the useful time is longer than the others.
4.High power,shock resistance,fast heat dissipation,high stability,long life & good moisture resistance.
5.Taps/Termianls leading out for bolts/wire connection ;
6.Widely used for PCB installation,DC circuits,and low frequency AC circuits.
Specification
| Performance Charactertics | ||
| Test | Conditions of Test | Testing Results |
| Resistance Tolerance | Testing Voltage ≤3V,Ambient Temperature 25℃ | B---D---F---G---J--K |
| Rated Load | 40℃,rated voltage,1hour | △R≤±(3％+0.1Ω) |
| Short Time Overload | 5 times rated power for 10s | △R≤±(0.2％+0.1Ω) |
| Dielectric Withstand Voltage | 2 times Rated Power Voltage +1kv AC 60s (with grounding), leakage current 2.5mA ; 2 times Rated Power Voltage +2kv AC 60s (with grounding), leakage current 2.5mA ; |
△R≤±(0.1％+0.05Ω) |
| Insulation Resistance | 500V DC | ≥10GΩ1Min |
| Terminal Tensile Strength | 40N | No off |
| Vibration resistance | 1.5mm,10-55-10Hz,each 2hours | No damage,No off |
| Load Life | at rated voltage,90 min "On",30 min "Off" ,total 500hours | △R≤±(3％+0.1Ω) |
| Low Temperature Resistance Testing | store at -65℃±3℃ for 2H | △R≤±(1%+0.1Ω) |
| High Temperature Resistance Testing | store at 70 ℃± 2 ℃ for 16h, connect the rated voltage DC circuit for 1s | △R≤±(1%+0.1Ω) |
| Non-flammability | 10 times rated power, power on for 5s | without combustion |
Applications
Widely used in Industrial control,servo and harsh environment.
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