FANOX SIA-B, Installation & Commissioning Manual, Page: 28 / 32

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TEST 3
Settings:
- Permission: YES.
- Curve: IEC Inverse.
- Dial: 0.5
- TAP: 1xIs=16 A.
- Theoretical tripping time = 5.01 seconds (Fault
current 32A)
o
admissible current measurement: 32+5%= 33.6 A.

Time: 4.68s -5% = 4.446s
o
admissible current measurement: 32-5%= 30.4 A

Time: 5.42s +5% = 5.691s.
The following information will be checked :
- Pick-up at 110% of the tap
- Trip output is activated
- Trip flag is activated
•
51N Inverse time neutral overcurrent protection:
TEST 1
Settings:
- Permission: YES.
- Curve: IEC Inverse.
- Dial: 0.05
- TAP: 1xIs.
- Theoretical tripping time= 1.56 seconds (Fault current 20A)
o
admissible current measurement: 20+5%= 21 A.

Time: 1.28s -5% = 1.216s
o
admissible current measurement: 20-5%= 19 A

Time: 2.03s +5% = 2.1315s.
The following information will be checked :
- Pick-up at 110% of the tap
- Trip output is activated
- Trip flag is activated
Real admissible tripping time range: [4.446
s…5.691s]
Real admissible tripping time range: [1.216
s…2.1315s]