GE P50 Agile P253 - Negative Phase Sequence Overcurrent; 2 nd Harmonic; IFL; Thermal Overload

13 Technical Specifications
P50 Agile P253
13-6
P253/EN M/C
Negative Phase Sequence Overcurrent
I.
Operating value Pick-up Setting ±5%
Minimum trip level (IDMT)
1.05 x Setting ± 5%
Drop –off
0.95 x Setting ± 5%
II.
Operating time IDMT characteristic shape
As per clause 5.2 of 60255-
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 ±7.5% or 55 ms whichever is
greater
IDMT (only for IEEE & US curves)
Calculated time ±10%
2nd Harmonic
I.
Operating value 2ndHarm Thresh Setting ± 15%
I>lift 2H Setting ± 15%
IFL
I.
IFL setting
Operating value
Setting ±5%
Thermal Overload
I.
Thermal alarm/trip/lockout Setting accuracy Setting ±5%
Operating time Calculated time ±7.5%
Reset value 97% of thermal setting ±5%
II.
Cooling Time Accuracy ±15% of theoretical time
Loss of Load
I.
Operating value
Pick-up
0.95 x Setting ± 5%
Drop –off
1.05 x Setting ± 5%
Operating time DT operation ± 5% or 55 ms whichever is greater
II.
T inhib DT operation ±5% or 55 ms whichever is greater
CB Fail
I.
Operating time DT operation ± 5% or 60 ms whichever is greater
CBF Reset <30 ms*
II.
Operating value
Reset current (I< / IN1<)
Setting ± 5%
*Note : Filtering time (typically 25ms) is added when CBF initiated by external binary input
Stall Detection
I.
Prolonged start / Stall detection/
Stall Rotor Strt
Pick-up Setting ±5%
Timer accuracy ±5% or 55 ms whichever is greater
Limit NB Strt
I.
Supervising Time / Time Betwe Start /
Inhib. Strt Time
Timer accuracy ±5% or 55 ms whichever is greater
Note: As per IEC60255-151 Class 5.2 (assigned error 5%) the tolerance calculated as below.
Value of characteristic quantity as multiple of setting value (Gs) 2-5 5-10 Above 10
Limiting error as multiple of an assigned error 2.5 1.5 1