Thytronic NA30, Руководство пользователя

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TECHNICAL DATA
16 NA30 - Manual - 04 - 2022
3.6 GENERAL SETTINGS
Relay nominal frequency ( f
n
) 50, 60 Hz
Relay phase nominal current ( I
n
) 1 A or 5 A
[1]
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 o 5 A
[1]
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)
Relay residual nominal voltage ( U
En
) 50...130 V (step 1 V)
Residual primary nominal voltage (phase-to-phase) ∙√3 ( U
Enp
) 50 V...500 kV
50...499 V (step 1 V)
500...4990 V (step 10 V)
5000...49900 V (step 100 V)
50000...500000 V (step 1000 V)
3.7 PROTECTIVE FUNCTIONS
‡ Base current - IB
[2]
Base current ( I
B
) 0.10...2.50 I
n
(step 0.01 I
n
)
‡ Thermal protection with Pt100 probes - 26
[3]
ThAL1...8 Alarm:
Alarm threshold 26 PT1...PT8 ( Th
AL1...8
) 0...200 °C
Operating time ThAL1...8 (t Th
AL1...8
) 0....100 s
Th>1...8 Trip:
Trip threshold 26 PT1...PT8 ( Th>
1...8
) 0...200 °C
Operating time ThAL1...8 (t Th>
1...8
) 0....100 s
‡ Thermal image - 49
Common configuration:
Initial thermal image
Dq
IN
( Dth
IN
) 0.0...1.0
Dq
B
(step 0.1
Dq
B
)
[4]
Reduction factor at inrush ( K
INR
) 1.0...3.0 (step 0.1)
Thermal time constant
t
( T ) 1...200 min (step 1 min)
DthCLP activation time ( t
DthCLP
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
DthAL1 Element
49 First alarm threshold ( Dth
AL1
) 0.3...1.0
Dq
B
(step 0.1
Dq
B
)
DthAL2 Element
49 Second alarm threshold ( Dth
AL2
) 0.5...1.2
Dq
B
(step 0.1
Dq
B
)
Dth> Element
49 Trip threshold ( Dth >) 1.100...1.300
Dq
B
(step 0.001
Dq
B
)
Pickup accuracy ± 1% with 0.1 I
n
, ± 1% with 1 I
n
Operate time accuracy 5% or ± 10 ms
‡ 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
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)
Note 1 The nominal current settings doesn’t concern the protection elements; they must agree with hardware setting (dip-switch 1 A or 5 A) .
Note 2 The basic current I
B
represents the nominal current of the line or transformer, referred to the nominal current of the CT’s for thermal image
protection. If the secondary rated current of the line CT’s equals the rated current of the NA30 relay, as usually happens, the I
B
value is the ratio
between the rated current of the protected element and the primary rated current of the CT’s
Note 3 The 26 element is available when the MPT module is connect on Thybus and enabled
Note 4
Dq
is the thermal image (p.u. of the basic over temperature corresponding to the basic current
I
B
).
Assuming that the secondary rated current of the line CT’s equals the rated current of the NA30 relay, as usually happens, the IB value is the
ratio between the rated current of the protected element and the primary rated current of the CT’s