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Power Wirewound Resistors
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Current Sense Resistors
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Resistive Load Bank
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DC Current Shunt
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Blower Motor Resistor
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High Voltage Resistors
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Wirewound Rheostat
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Network Resistors
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Crowbar Resistor
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Film Resistors
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Jeffery BellI found JDC because Vishay/TT current sense resistor was shortage, JDC provided alternative parts in a short time and their parts can fully replace Vishay/TT part with much better lead time.
1.35MJ Crowbar Resistor Air Cooling
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xRated Energy | 10KJ-10MJ | Structure | Air Cooling |
---|---|---|---|
Resistance Range | 0.01Ω-0.1Ω | IP Grade | IP20-IP23 |
Resistor Material | Stainless Steel | ||
High Light | 1.35MJ Crowbar Resistor,Crowbar Resistor Air Cooling |
1.35MJ Crowbar Resistor, Wind Power Generation
Crowbar Resistors
Crowbar resistors are three phase resistance banks which are connected to the rotor windings of the DFIG (Doubly-Feed Induction Generator) such as wind power generator.
They are used to prevent damage to the inverter circuits attached to rotor side when a fault occurs in the grid. DFIG power converter, which has a restricted over-current limit, needs special attention during faults in the grid. If the rotor current or DC link voltage reaches the threshold value, crowbar resistors disconnect the converter in order to prevent the generator turning into a squirrel cage induction machine. By crowbar resistors, the DFIG could stay connected to the grid and continue its operation.
The crowbar resistors should be high enough to limit the short circuit rotor current and also they should be low enough to avoid too high voltage in the rotor circuit. The crowbar resistor should be designed with low inductance and capable of handling very high currents for short periods.