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NC2 0 - Manual - 01 - 2015

FUNCTION CHARACTERISTICS

For every of the two thresholds the logic block can be set.

Logical block (Block1)

If the U<BLK1 and/or U<<BLK1 enabling parameters are set to ON and a binary input is designed

for logical block (Block1), the protection is blocked off whenever the given input is active.

The trip timer is held in reset condition, so the operate time counting starts when the input block goes

down.

[1]

The enabling parameters are available inside the Set\Proﬁ le A(or B) \ Undervoltage - 27 \

U< Element (U<< Element) \Setpoints menus, while the Block1 function must be assigned to the

selected binary input inside the Set \ Inputs \ Binary input IN1(2) menus (IN1 or IN2 matching).

Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR-

ING section.

Fun-F27_S2.ai

Logic diagram concerning the second threshold (U<<) of the undervoltage element - 27

RESET

U<<def

TRIPPING MATRIX

(LED+RELAYS)

U<<def

Start U<<

Trip U<<

BF Enable (ON≡Enable)

towards BF logic

U<< BF

Enable (ON≡Enable)

Block1 input (ON≡Block)

Block1

(ON≡

Inhibit

)

U< Inhibition

U<disbyU<<

Binary input INx

Logic

INx

OFF

n.o.

n.c.

INx

OFF

U<<ST-K

U<<TR-K

U<<ST-L

U<<TR-L

U<<BF

BLK1U<

U<<BLK1

Logic27

≥1

State

U ≤

def

U<<

def

27 Inhibition

(ON≡

Inhibit

)by MMI

Fun-F27_S2.ai

Logic diagram concerning the second threshold (U<<) of the undervoltage element - 27

RESET

U<<def

TRIPPING MATRIX

(LED+RELAYS)

U<<def

Start U<<

Trip U<<

BF Enable (ON≡Enable)

towards BF logic

U<< BF

Enable (ON≡Enable)

Block1 input (ON≡Block)

Block1

(ON≡

Inhibit

)

U< Inhibition

U<disbyU<<

Binary input INx

Logic

INx

OFF

n.o.

n.c.

INx

OFF

U<<ST-K

U<<TR-K

U<<ST-L

U<<TR-L

U<<BF

BLK1U<

U<<BLK1

Logic27

≥1

State

U ≤

def

U<<

def

27 Inhibition

(ON≡

Inhibit

)by MMI

Brand	Thytronic
Model	NC20
Category	Power distribution unit
Language	English

Thytronic NC20 User Manual

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Thytronic NC20 Specifications

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