TECHNICAL DATA
15
NA10 - Manual - 04 - 2022
3.4 MMI
Display 16x4 LCD backlight module
LEDs
Quantity 8
• ON/fail (green) 1
• Start (yellow) 1
• Trip (red) 1
• Freely allocatable (red) 5
Keyboard 8 keys
3.5 COMMUNICATION INTERFACES
Local port
Connection USB Type B
Protocol Modbus RTU®
Remote ports
RS485
• Connection screw terminals
• Baud rate 1200...57600 bps
• Protocol
[1]
ModBus®RTU
IEC 60870-5-103
DNP3
Ethernet 100BaseT
• Connection
[2]
Optical fiber 1300 nm, ST
100 Base TX, RJ45
• Baud rate 100 Mbps
• Protocol ModBus®TCP/IP
3.6 GENERAL SETTINGS
Relay nominal frequency f
n
50, 60 Hz
Relay phase nominal current I
n
1 A or 5 A
[3]
Phase CT primary nominal current I
np
1 A...10 kA
1...499 A (step 1 A)
500...4990 A (step 10 A)
5000...10000 A (step 100 A)
Relay residual nominal current I
En
1 A or 5 A
[3][4]
Residual CT primary nominal current I
Enp
1 A...10 kA
1...499 A (step 1 A)
500...4990 A (step 10 A)
5000...10000 A (step 100 A)
3.7 PROTECTIVE ELEMENTS
Thermal protection with Pt100 probes - 26
[5]
ThAL1...8 Alarm:
Alarm threshold 26 PT1...PT8 (Th
AL1...8
) 0...200 °C
Operating time ThAL1...8 (tTh
AL1...8
) 0....100 s
Th>1...8 Trip:
Trip threshold 26 PT1...PT8 (Th>
1...8
) 0...200 °C
Operating time ThAL1...8 (tTh>
1...8
) 0....100 s
Phase overcurrent - 50/51
I> Element
I> Curve type (I>
Curve
) DEFINITE
IEC/BS A, B, C
ANSI/IEEE MI, VI, EI
RECTIFIER, I
2
t or EM
I
CLP
> Activation time (t
CLP>
) 0.00...100.0 s
Note 1 The different versions must be select on order
Note 2 The different versions must be select on order
Note 3 The nominal current settings doesn’t concern the protection elements; they must agree with hardware setting (dip-switch 1 A or 5 A) .
Note 4 1 - 5 A selection is meaningful for standard CTs versions; the computed residual current is employed for NA10 protection relays equipped with
LPCT sensor inputs
Note 5 The 26 element is available when the MPT module is connect on Thybus and enabled
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