Section 5: Protection, Control, and Energy Automation PDF

Section 5: Protection, Control, and Energy Automation PDF

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Sepam™ Protection Configurations

Sepam Protection Configurations

Three relay series with increasing protection capabilities for six types of applications to provide all possible protection configurations

Sepam 80 Protection Functions

ANSI Device Number

Description

Sepam 80 Relay Models
S84 M87 M88 T87 G87 G88 C86 B80 B83
12/14 Speed Switch   ● ●   ● ●      
21B Underimpedance         ● ●      
24 Volts/Hertz       ● ● ●      
25 Synch Check ●     ● ● ●   ● ●
26 Thermostat   ● ● ●   ●      
27 Phase-to-phase Undervoltage ● ● ● ● ● ● ● ● ●
27D Positive sequence Undervoltage ● ● ● ● ● ● ● ● ●
27R Remnant Undervoltage ● ● ● ● ● ● ● ● ●
27S Phase-to-neutral Undervoltage ● ● ● ● ● ● ● ● ●
27TN Third Harmonic Neutral Undervoltage         ● ●      
32P Directional Power ● ● ● ● ● ●      
32Q/40/55 Directional Reactive Power   ● ●   ● ●      
37 Phase Undercurrent ● ● ●            
38 Bearing Temperature   ● ● ● ● ● ●    
40 Loss of Excitation   ● ●   ● ●      
46 Negative Sequence Current/Unbalance ● ● ● ● ● ● ● ● ●
47 Negative Sequence Undervoltage ● ● ● ● ● ● ● ● ●
48 Excessive Starting Time   ● ●            
49 Thermal Overload ● ● ● ● ● ● ●    
49T RTD Monitoring   ● ● ● ● ● ●    
50BF Breaker Failure ● ● ● ● ● ● ● ● ●
50/27 Inadvertent Energization         ● ●      
50 Instantaneous Phase Overcurrent ● ● ● ● ● ● ● ● ●
50G Instantaneous Ground Overcurrent (Measured) ● ● ● ● ● ● ● ● ●
50N Instantaneous Ground Overcurrent (Calculated) ● ● ● ● ● ● ● ● ●
50V Voltage Restrained Instantaneous Overcurrent       ● ● ●      
51 Time Phase Overcurrent ● ● ● ● ● ● ● ● ●
51C Capacitor Bank Unbalance             ●    
51G Time Ground Overcurrent (Measured) ● ● ● ● ● ● ● ● ●
51N Time Ground Overcurrent (Calculated) ● ● ● ● ● ● ● ● ●
51LR Locked Rotor   ● ●            
50V Voltage Restrained Instantaneous Overcurrent                  
51V Voltage Restrained Time Overcurrent         ● ●      
59 Phase-to-phase Overvoltage ● ● ● ● ● ● ● ● ●
59N Neutral Voltage Displacement ● ● ● ● ● ● ● ● ●
63 Buchholz Pressure       ●          
64G 100% Stator Ground Fault         ● ●      
64REF Restricted Ground Fault       ●          
66 Starts per hour   ● ●            
67 Directional Phase Overcurrent ●     ● ● ●      
67N Directional Ground Overcurrent ● ● ●   ● ●      
78 Pole Slip   ● ●   ● ●      
79 Reclosing ●                
81H Overfrequency ● ● ● ● ● ● ● ● ●
81L Underfrequency ● ● ● ● ● ● ● ● ●
81R Rate of Change of Frequency ●                
87M Machine Differential   ●     ●        
87T 2 Winding Transformer Differential     ● ●   ●      
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