Thytronic NA011 - Page 32

FUNCTION CHARACTERISTICS
32
NA011 - Manual - 05 - 2022
Example 2
The residual CT primary current I
Enp
must be set as: I
Enp
= 100 A
Example 3
The residual CT primary current I
Enp
must be set as: I
Enp
= 500 A
• Measurement reading mode
- With Reading Relative setting all measures are related to the nominal value,
- With Reading Direct setting all measures are related to the primary value.
Es2-IEn.ai
3x
K
TA
= 100A / 5A
52
I
En
= 5 A
NA011
Es-In.ai
K
CT
= 500A/5A=100
52
I
n
NA011
I
L1...
I
L3
LPCTs CURRENT INPUTS
L1
L2
L3
In = 500 A
In = 500 A
In = 500 A
LPCT Setting
800 A
400 A
200 A
100 A
50 A
In=50...1250A
1A/5A