300Watt High Power Vitreous Ceramic Variable Wire Wound Rheostats
Structure :
1.BCI series Variable Rheostat is wound with copper or
chromium-alloy wire as a resistance element. Except for the slide
contact surface,the entire component is coated with a
high-temperature,non-flammable resin.After cooling and drying,
insulation is applied through a high-temperature process.
2.Then a centered rotatingadjuster component is installed,which
slides along the resistance element and varies the resistance to
the desired value.
3.Single unit with multiple winding resistance values is available.
4.Different ceramic raw material & knobs,made-to-order
rheostats available.
5.The product range covers a wide field, from flat,round- and wire
wound resistors
6.Dimensions for reference only,consult us for more details.
Features:
1.Variable resistors are often called varistors or
potentiometers.Variable BCI may used as a rheostat with two
connections(the wiper and just one end of the track )or as a
potentiometer with all three connections in use.
2.On one resistor ,can have the different resistance
requirement(flat and round wire can be in same rheostat).
3. High power rating,resistance to humidity, resistance value in
great adjustable range.
4.Motor controller also use BCI series as rheostat or potentiometer
to control the speed of a by limiting the flow of current through
them.
5.Slide rheostats are also available and often used for education
and in laboratory environments.Linear or slide types are
constructed of resistive wire wound on an insulating cylinder. A
sliding contact is used to increase or decrease the resistance.
6.For non-standard technical requirements and custom special
applications,please contact us to discuss the details.
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 blenders,mixers,fans,power tools,educational
modeling,load simulations,industrial machinery RPM
adjustment,voltage and current adjustment,instruments,and automated
control installations,etc.
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