Two terminal extensions are fixed on both ends of a ceramic tube on whose surface winds wave-shaped alloy resistance wire and a high temperature-resistant and fireproof coating are applied. The ceramic tube can function as resistance wire skeleton and heat radiator as well . This product can be customized to special needs of customers and applicable to simulation load test, equipend discharge, automated controlProduction name | Variable Resistor,Adjustable Resistance,Wirewound Rheostat,Ceramic Tube Wirewound Variable Resistor | ||
Power rating | 15W-20KW | ||
Resistance value | 0.01Ω-100KΩ | ||
Resistance tolerance | 0.1%, 0.5%, 1%, 5%, 10% | ||
Features | 1. Copper wire or chrominum alloy wire is wound on the ceramic tube coated with non-flammable resin,good dissipation ,high stability, and long life. 2.high power rating,high overload. 3.The DDR series own higher resistance value than the DQR series. 4.Widely used in power supply,transducer, elevator,arena audio and Lifting,Braking,Ship ,Load equipment, high requirement equipment industry,ect. 5.For customer specifications,can be made into variable resistor. | ||
Common specification | 500W100Ω,500W150Ω,800W75Ω,1000W 70R ,1040W50Ω,1040W75Ω, 1200W 50Ω,1500W 130Ω, 2000W40Ω,2500W50Ω,3000W75Ωect | ||
Performance | Test item | Test condition | performance |
Temperature coefficient | JIS-C-5202 5-2 | ±350PPM/Max | |
Power rating load | JIS-C-5202 5-4 | ΔR≤±(1%+0.1Ω)Surface temperature ≤350 | |
Short-term overload | JIS-C-5202 5-5 1000% rated power 5s | Free or appearance or structural irregularity ΔR≤±(2%+0.1Ω) | |
Insulation resistance | JIS-C-5202 5-6 1000V DC | 100 MΩ Min | |
Dielectric withstanding voltage | JIS-C-5202 5-7 1500V DC 60s | Free or appearance or structural irregularity ΔR≤±(0.1%+0.05Ω) | |
Vibration | JIS-C-5202 6-3 1.5mm,10-50-10Hz/min | Free or appearance or structural irregularity ΔR≤±(1%+0.05Ω) | |
Thermal shock | JIS-C-5202 7-3 Room temp 30 min ON-55 15 min OFF | Resistor free of structural irregularity crack of silicon cement surface ΔR≤±(2%+0.1Ω) | |
humidity | JIS-C-5202 7-5 40 90%RH 240H | Free or appearance or structural irregularity ΔR≤±(3%+0.1Ω) | |
Load life | JIS-C-5202 7-10 90Min ON-30Min OFF 500H | Free or appearance or structural irregularity Discoloration of marking ΔR≤±(3%+0.1Ω) | |
NOTE | 1. For customer specifications,please contact us to discuss the details. 2. Different power rating owning multi weight ,dimension and packing . 3. More details, please contact us. | ||
