Traction line test resistors are used to test the (railway or tram) overhead contact lines and are installed in direct current switchgears for the contact line system power supply.
Based on our long experience, implemented design procedures and advanced 3D modelling, we can quickly design any resistor that meets individual requirements (see Detailed Parameters).
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Specification of technical parameters
| Resistor type | RP.40A.12s.80R |
| Rated operating voltage | 3,3kV |
| Test voltage of insulation | 18,5kV / 1min., 50Hz |
| Rated resistance at 20°C: | 80Ω ±5% |
| Rated operating current: | 40A |
| Thermal strength: | 12s. |
| Typical operating cycle: | Operation: 3s, Interval: 5s., Operation: 3s., Interval: 30s, Operation: 3s., Interval: 5s, Operation: 3s. – end of cycle |
| IP rating | IP00 |
| Type of cooling | Natural |
Low-voltage line test resistor of 6Ω: 4,5kW, 6kW
| Resistor type | RP.4,5kW.6R | RP.6kW.6R |
| Rated operating voltage | ≤1kV | |
| Test voltage of insulation: | 2,5kV/1min. | |
| Rated resistance at 20°C: | 6Ω±5% | |
| Rated operating current: | 100A | |
| Thermal strength at rated current for ΔT: 380°C: | 6s. | 10s. |
| Typical operating cycle: | 3 x Load for 2s., every 18s. The resistors can withstand more such consecutive cycles | |
| IP rating | IP00 | IP00 |
| Type of cooling | Natural | Natural |