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                      | Three-phase Voltage Relay |  
                      | Monitorfor three-phase overvoltages, undervoltages, phase ... |  
                      | view |  | 
                    
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                      | Single-phase Volatage Relay |  
                      | Monitor for single-phase overvoltages or undervoltages. |  
                      | view |  | 
                    
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                      | DC Voltage Relay |  
                      | Monitor for DC power overvoltages or undervoltages. |  
                      | view |  |