KNP-A Wire Wound Resistors Flameproof Anti-Burst Features: 1. Fail-Safe without flames,explosion and are when mains voltage 80~270V AC directly applied. 2. High Dielectric Withstanding Voltage up to 1KV 3. Anti-Burst construction in a ceramic tube, resistant to humidity and insulation. 4. UL1412 approved.
KNP-A Wire Wound Resistors Flameproof Anti-Burst
Products | KNP-A Wire Wound Resistors, Flameproof, Anti-Burst |
Features | 1. Fail-Safe without flames,explosion and are when mains voltage 80~270V AC directly applied. 2. High Dielectric Withstanding Voltage up to 1KV. 3. Anti-Burst construction in a ceramic tube, resistant to humidity and insulation. 4. UL1412 approved. |
Electrical And Mechanical Performance of KNP-A Wire Wound Resistors Flameproof Anti-Burst:
Characteristics | Standards | Test Methods |
Resistance Tolerance | ±5%(J) | - |
Resistance Temp. Coeff. | <4500 ppm/°C | -55°C ~ 200°C |
Power Rating Load | Surface temp. 275°C Max.ΔR/R≤±1% | Rated voltage for 30 minutes |
Short Time Overioad | ±2% | 5 times of rated wattage for 5 seconds.
|
Dielectric Withstanding Voltage | No evidence of mechanical damage or insulation breakdown.
| AC 1000V for 1 minutes.
|
Insulation Resistance | 10,00MΩ | DC 500V megger
|
Terminal Strength
| No evidence of mechanical damage.
| 1 kg
|
Solder-ability | Minimum95%coverage | 235 ± 5°C for 2 seconds |
Resistance to Soldering Heat | No evidence of mechanical damage.ΔR/R≤±1% | 270±5°C for 10 ±1 seconds 350±10°C for3.5 ±0.5seconds |
Environmental Characteristics of KNP-A Wire Wound Resistors Flameproof Anti-Burst:
Characteristics | Standards | Test Methods |
Temp. Cycle | △R/R≤±1% | -55°C( 30 min.) —►Room Temp.( 3 min.) —► +200°C( 30 min.) —► Room Tenp.( 3 min.) / ( 5 cycles) |
Load Life | △R/R≤±3% | Rated power load 90 minutes ON 30 minutes OFF 70°C 1000 hours |
Moisture-proof Load Life | △R/R≤±3% | Rated power load 90 minutes ON 30 minutes OFF 40°C95%RH1000 hours |
Nonflammability
| not flamed
| 16 times of rated wattage for 5 min.
|
Dimensions of KNP-A Wire Wound Resistors Flameproof Anti-Burst:
Rated Wattage | D±1 | L±1 | X Max. | H±3 | d±0.1 | Resistance Range(Ω) |
1WS | 4.5 | 6 .5 | 9 | 28 | 0.65 | 1~47 |
Derating Curve of KNP-A Wire Wound Resistors Flameproof Anti-Burst:
For resistors operated in ambient temperatures above 20°C , power rating must be derated in accordance with the curve below.
Surface Temperature Rise of KNP-A Wire Wound Resistors Flameproof Anti-Burst:
