Thytronic NA011, Manual, Page: 15 / 95

TECHNICAL DATA
15 NA011 - Manual - 05 - 2022
3.4 MMI
Display 16x2 LCD backlight module
LEDs
Quantity 8
• ON/fail (green) 1
• Start (yellow) 1
• Trip (red) 1
• Trip I>, I>>, I>>> (red) 1
• Trip IE>, IE>> (red) 1
• 52a - Circuit Breaker closed (red) 1
• 52b - Circuit Breaker open (red) 1
• 79 - Automatic reclosure (red) 1
Keyboard 8 keys
3.5 COMMUNICATION INTERFACES
‡ Local port
Connection RJ10
Baud rate 19200 bps
Parity None
Protocol Modbus RTU®
‡ Remote ports
RS485
• Connection screw terminals
• Baud rate 1200...57600 bps
• Protocol ModBus®RTU
IEC 60870-5-103
3.6 GENERAL SETTINGS
Relay nominal frequency f
n
50, 60 Hz
Phase CT primary nominal current I
np
[1]
1 A...5000 A
1...99 A (step 1 A)
100...5000 A (step 5 A)
Residual CT primary nominal current I
Enp
[2]
1 A...1000 A
1...99 A (step 1 A)
100...5000 A (step 5 A)
3.7 PROTECTIVE ELEMENTS
‡ Phase overcurrent - 50/51
I> Element
I > Curve type ( I>
Curve
) DEFINITE,
IEC/BS A, B, C,
ANSI/IEEEE MI, VI, EI, I2T
CLP Activation time ( t
CLP>
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I > Reset time delay ( t >
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 First threshold definite time ( I >
def
) 0.100...20.0 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
)
I >
def
within CLP ( I
CLP>def
) 0.100...20.0 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
) I >
def
I >
def
Operating time ( t >
def
) 0.03...10.00 s (step 0.01 s)
Note 1 The rated phase current settings doesn’t concern the 50/51 protection elements; they must agree with nominal primary current for traditional CT
inputs or dip-switch 50...1250 A for LPCT inputs for a right reading of the phase current primary values (Reading Direct).
Note 2 The rated residual current settings doesn’t concern the 50N/51N protection elements; they must agree with nominal primary current of the CT
inputs for a right reading of the residual current primary values (Reading Direct).
For the NA011#xxx0 and NA011#xxx1 versions (no residual current input circuit), the parameter is meaningless