Editing Argon user guide/Braking resistor
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* Additionally it is a recommended to shield the resistor terminals from accidental touching | * Additionally it is a recommended to shield the resistor terminals from accidental touching | ||
===Parameterization=== | ===Parameterization=== | ||
| − | The important parameter that controls usage of resistor in Granity is the over voltage level | + | The important parameter that controls usage of resistor in Granity is the over voltage level [[FOV]]. Drive starts conducting current through resistor when [[HV DC bus]] voltage is near FOV value. It is important to set FOV high enough to prevent drive from using resistor constantly while AC supply is connected to the drive. The formula for ''mimimum'' FOV value is: FOV<sub>minimum</sub>=V<sub>AC</sub>*1.6. I.e. on nominal 230 VAC bus the FOV value should be set to no less than 368 VDC. |
| − | {{Damage|Setting | + | {{Damage|Setting [[FOV]] value too low causes drive to use resistor constantly thus causing constant heating of resistor. Resistor easily overheats and burns in such case. After setting FOV, monitor resistor temperature for a minute in normal use to ensure that it is not over heating.}} |
===Resistor sharing=== | ===Resistor sharing=== | ||
It is possible to share HV DC link between Argon drives to reduce number of braking resistors needed. Sharing DC bus also forms a higher power HV DC supply between the drives allowing higher power drawn from a single drive if other drives are running on lighter load. | It is possible to share HV DC link between Argon drives to reduce number of braking resistors needed. Sharing DC bus also forms a higher power HV DC supply between the drives allowing higher power drawn from a single drive if other drives are running on lighter load. | ||
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[[File:Brakeres_sharing.png|500px|thumb|Wiring of shared braking resistor between multiple Argon drives]] | [[File:Brakeres_sharing.png|500px|thumb|Wiring of shared braking resistor between multiple Argon drives]] | ||
{{electricshock|The terminals of the resistors are connected to dangerous voltages. Never touch them before drive power has been [[Power supply safe discharging|safely discharged]].}} | {{electricshock|The terminals of the resistors are connected to dangerous voltages. Never touch them before drive power has been [[Power supply safe discharging|safely discharged]].}} | ||
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