S&C Instruction Sheet 659-555
5
Trip Settings
The PCS will trip under the conditions shown in Table 1.
Table 1. Default Trip Settings
Default Limits
Default Limits
Adjustable Range
Nominal
Value
Trip Time (Sec.)
Value
Trip Time (Sec.)
<0 .5 Vnom
380 V
190 V
0 .16
150-370 V
0 .1-300
0 .5 Vnom ≤ V < 0 .88
Vnom
380 V
334 V
2
150-370 V
0 .1-300
1 .1 Vnom ≤ V < 1 .2
Vnom
380 V
418 V
1
390-532 V
0 .1-300
1 .2 Vnom ≤ V
380 V
456 V
0 .16
390-532 V
0 .1-300
Frequency, 60 Hz
60 Hz
60 ±1 .5 Hz
0 .15
60 ±2 .5 Hz
0 .1-300
NOTICE
Obtain approval from the authority having jurisdiction before adjusting these setpoints . During abnormal voltage or
frequency conditions or in response to a detected unintentional islanding, the system will open the ac circuit breaker .
In case of a short circuit on the output of the PCS, the current and duration contribution from the PCS is explained in Table 2.
Table 2. Ac Output Short-Circuit Contribution
Condition
Amps
Duration
Short L1 - L2
Short-circuit current — initial: amps (rms) and duration of 16 .7 ms or 1 cycle
1612 .4 A(rms)
16 .68 ms
Short-circuit current — maximum: amps (peak) and duration (ms)
2280 A(rms)
16 .68 ms
Short-circuit current — breaking: amps (RMS) and duration (ms)
0 Arms
-
Short L1 - L3
Short-circuit current — initial: amps (rms) and duration of 16 .7 ms or 1 cycle;
1110 .3 A(rms)
13 ms
Short-circuit current — maximum: amps (peak) and duration (ms)
1570 A(peak)
13 ms
Short-circuit current — breaking: amps (RMS) and duration (ms)
0 A(rms)
-
Short L2 - L3
Short-circuit current — initial: amps (rms) and duration of 16 .7 ms or 1 cycle;
1354 .3 A(rms)
16 .55 ms
Short-circuit current — maximum: amps (peak) and duration (ms)
1915 A(peak)
16 .55 ms
Short-circuit current — breaking: amps (RMS) and duration (ms)
0 A(rms)
-
The PCS is set to trip in the unbalance conditions stated in Table 3.
Table 3. Unbalance Conditions
Output Measured (V)
Output Measured (V)
Output Measured (V)
Output Freq
(Hz)
Output Power (kW)
Current unbalance (%)
368 .6
368 .2
367 .6
60 .01
0
0 .14
352 .5
351 .74
351 .86
60
25
0 .14
356 .44
355 .54
355 .67
60
45
0 .15
358 .46
358 .43
358 .19
60
66
0 .02
357
357 .27
356 .98
59 .999
90
0 .05
355 .93
356 .15
355 .87
59 .999
108
0 .04
355 .87
355 .87
355 .73
59 .999
138
0 .02
357 .17
356 .9
356 .76
59 .999
200
0 .08
357 .89
357 .57
357 .48
59 .999
240
0 .08
357 .84
358 .62
358 .37
59 .999
285
0 .09
Safety Information
