Thytronic NC20, Manual, Page: 130 / 227

130
130 NC20 - Manual - 01 - 2015 MEASURES, LOGIC STATES AND COUNTERS
5 M E A S U R E S , L O G I C S T A T E S A N D C O U N T E R S 5 M E A S U R E S , L O G I C S T A T E S A N D C O U N T E R S
Measures
Direct
Frequency ( f )
RMS value of fundamental component for phase currents ( I
L1
, I
L 2
, I
L 3
)
RMS phase currents ( I
L1RMS
, I
L 2RMS
, I
L 3RMS
)
RMS value of fundamental component for input voltages ( U
L1
, U
L 2
, U
L 3
)
RMS value of fundamental component for unbalance neutral current ( I
N
)
Calculated
Thermal image ( DTheta )
Displacement angle of I
N
with respect to I
L1
( Phi
N
)
RMS value of fundamental component for compensated neutral current ( I
NC
= I
N
- I
C
)
Displacement angle of I
NC
with respect to I
L1
( Phi
NC
)
RMS value of fundamental component for calculated residual current ( I
EC
)
Maximum RMS current between I
L1RMS
- I
L 2RMS
- I
L 3RMS
( I
LMAX-RMS
)
Minimum RMS current between I
L1RMS
- I
L 2RMS
- I
L 3RMS
( I
LMIN-RMS
)
Average RMS current between I
L1RMS
- I
L 2RMS
- I
L 3RMS
[ I
L-RMS
= ( I
L1RMS
+ I
L2RMS
+ I
L3RMS
)/3]
Maximum RMS voltage of fundamental component between U
L1
- U
L 2
- U
L 3
( U
LMAX
)
Average RMS voltage of fundamental component between U
L1
- U
L 2
- U
L 3
[ U
L
= ( U
L1
+ U
L 2
+ U
L 3
)/3]
Harmonic distortion factor for phase currents THD
L1
- THD
L 2
- THD
L 3
[ THD
L1
% = 100∙√( I
L1
2
+ ... + I
L1-11th
2
)/ I
L1
] = 100∙ I
L1RMS
/ I
L1
[ THD
L 2
% = 100∙√( I
L 2
2
+ ... + I
L 2-11th
2
)/ I
L 2
] = 100∙ I
L 2RMS
/ I
L1
[ THD
L 3
% = 100∙√( I
L 2
2
+ ... + I
L 3-11th
2
)/ I
L 3
] = 100∙ I
L 3RMS
/ I
L1
RMS value of fundamental component for unbalance phase current ( I
2
)
Demand phase
RMS phase currents fi xed demand ( I
L1FIX
, I
L 2FIX
, I
L 3FIX
)
RMS phase currents rolling demand ( I
L1ROL
, I
L 2ROL
, I
L 3ROL
)
RMS phase currents peak demand ( I
L1MA X
, I
L 2MA X
, I
L 3MA X
)
RMS phase currents minimum demand ( I
L1MIN
, I
L 2MIN
, I
L 3MIN
)
Protection
For each protection threshold, the following data are available:
Start
ON/OFF
Trip
ON/OFF
Logic block (Block1)
ON/OFF
Selective block (Block2)
ON/OFF
Cold Load Pickup
ON/OFF
Delayed inputs
The binary input states, acquired downstream the delay timers are available:
IN1
ON/OFF
IN2
ON/OFF
Internal states
The state of the functions assigned to binary inputs are available:
Reset LEDs
ON/OFF
Profi le selection
ON/OFF
Fault trigger
ON/OFF
IE /IPh Block2
ON/OFF
IPh Block2
ON/OFF
IE Block2
ON/OFF
Block1
ON/OFF
Tcs1
ON/OFF
Tcs2
ON/OFF
Trip External protections
ON/OFF
Reset partial counters
ON/OFF
Reset CB monitoring data
ON/OFF
52a
ON/OFF
52b
ON/OFF
Open CB
ON/OFF
Close CB
ON/OFF
Thermal image presetting
ON/OFF
Remote trip
ON/OFF
MCB VT OPEN
ON/OFF
Reset TDcnt counter
ON/OFF
Reset discharge timer tD
ON/OFF
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