13 Technical Specifications 
P50 Agile P153
 
13-6  P153/EN M/B
 
II.   
 Operating time  IDMT characteristic shape  
As per clause 5.2 of IEC60255-151 or        
50 ms whichever is greater      
DT operation   ± 5% or 55 ms whichever is greater** 
** Reference condition  Currents applied at 2x pick-up level or  
higher 
III.   
Reset time  DT   Set delay ±10% 
IDMT (only for IEEE & US curves)  Calculated time ±10% 
Negative Phase Sequence Overcurrent 
I.   
Operating value   Pick-up  Setting +10% / - 5% 
Minimum trip level (IDMT)   Setting ± 5% (for setting >=0.2In) 
Setting ± 15% (for setting <0.2In) 
 Drop –off  0.95 x Setting ± 5% (for setting >=0.2In) 
0.90 x Setting ± 15% (for setting <0.2In) 
II.   
Operating time  IDMT characteristic shape  
As per clause 5.2 of IEC60255-151 or        
50 ms whichever is greater      
DT operation   ± 5% or 55 ms whichever is greater** 
** Reference condition  Currents applied at 2x pick-up level or  
higher 
III.   
Reset time  DT   Set delay ±10% 
IDMT (only for IEEE & US curves)  Calculated time ±10% 
Broken Conductor 
I.   
Operating value  Pick-up  1.05 x Setting ± 5% 
Drop –off  0.95 x Setting ± 5% 
DT operation   ± 5% or 55 ms whichever is greater 
2nd Harmonic 
I.   
 Operating value   2ndHarm Thresh 
Setting ± 15% or 25mA whichever is 
greater  
 I>lift 2H  Setting ± 15% 
Thermal Overload 
I.   
Operating time  Thermal Trip   ± 10% of calculated time** 
** Reference condition 
Currents applied at            
1.1x (Thermal Trip* K setting) or higher 
Under current 
I.   
Operating value  Pick-up  0.95 x Settings ± 7.5% 
Drop –off  1.05 x Settings ± 7.5% 
Operating time  DT operation  ± 5% or 55 ms whichever is greater 
Cold Load Pickup 
 
tcold operating time  tcold 
Setting ± 10% (with additional Binary 
input filtering time) 
 
tclp operating time  tclp 
Setting ± 10% (with additional Binary 
input filtering time) 
 
Operating value  Pick-up  Setting +10% / - 5% 
Minimum trip level (IDMT)   Setting ±5% (for settings >=0.2xIn)  
Setting ±15% (for settings <0.2xIn) 
Drop –off 
0.95 x setting ± 5% (for settings 
>=0.2xIn)  
0.90 x setting ± 15% (for settings               
< 0.2xIn)