Parameter
Values (Range)
Unit
Step
Default
Description
Curve parameter C
0.02...2.00
1
2.00
Parameter C for customer programmable
curve
Curve parameter D
0.46...30.00
1
29.10
Parameter D for customer programmable
curve
Curve parameter E
0.0...1.0
1
1.0
Parameter E for customer programmable
curve
Table 394:
51NHA Non group settings (Advanced)
Parameter
Values (Range)
Unit
Step
Default
Description
Reset delay time
0...60000
ms
10
20
Reset delay time
4.2.5.8
Monitored data
Table 395:
51NHA Monitored data
Name
Type
Values (Range)
Unit
Description
PICKUP_DUR
FLOAT32
0.00...100.00
%
Ratio of pickup time / trip time
I_HARM_RES
FLOAT32
0.0...30000.0
A
Calculated harmonics current
BLKD_I_REF
BOOLEAN
0=False
1=True
Current comparison status
indicator
51NHA
Enum
1=Enabled
2=blocked
3=test
4=test/blocked
5=Disabled
Status
4.2.5.9
Technical data
Table 396:
51NHA Technical data
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured
current: f
n
±2 Hz
±5% of the set value or ±0.004 × I
n
Pickup time
1)2)
Typically 77 ms
Reset time
Typically 40 ms
Reset ratio
Typically 0.96
Trip time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Table continues on next page
Section 4
1MAC059074-MB A
Protection functions
408
615 series ANSI
Technical Manual
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