INSTALLATION
58
NA011 - Manual - 05 - 2022
6.5 NOMINAL CURRENT
I
n
SETTING FOR LPCT
Factory default settings:
• Primary nominal phase current
I
n
: 300 A
• Nominal residual current
I
En
: 1 A (NA011#xxx2 and NA011#xxx3 versions as shown in the previous
pages)
To modify the phase rated currents, the dip-switches placed on the rear panel must be set
[1]
.
6.6 LED ALLOCATION
Eight indicator LEDs
[2]
and six keys
[3]
are available on the front panel:
6.7 FINAL OPERATIONS
Before energizing the electric board, it is advisable to check that:
• The auxiliary voltage in the panel falls within the operative range of relays.
• The rated current of the line CT’s corresponds to the settings of relay.
• All wirings are correct.
• All screws are tightly screwed.
Note 1 For LPCT versions the dip-switch position, located inside the CPU board, concerning the phase current setting are irrelevant
Note 2 The LEDs 3, 4 (CB position) and 5 (TCS) are enabled only when the logger is enabled
Note 3 The “I” e “0“ keys are disabled
C7
C8
F1
D1
RX
TX
F2
F3
F4
F5
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
B1
B2
B3
B4
B5
B6
B7
B8
E1
3
1
2
LPCT
Setting
50
200
400
100
800
50
200
400
100
800
L3
L2
L1
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
In = 300 A (100 + 200)
Factory default setting
cursor
In = 50 A
Minimum setting
In = 1250 A (800 + 400 + 50)
Maximum setting
configuration not allowed !
Start
79 (79 State)
CB CLOSED (52b)
CB OPEN (52a)
50-51 (I>, I>>, I>>> elements)
50N-51N (IE>, IE>> elements)
Trip
Open CB
Close CB