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NV10P - Manual - 01 - 2015

CHARACTERISTICS

Breaker failure (BF)

All undervoltage elements can produce the Breaker Failure output if the U< BF and U<< BF pa-

rameters are set to ON. The parameters are available inside the Set \ Proﬁ le A(or B) \ Undervoltage

- 27 \ U< Element (U<< Element) \ Setpoints menus.

[1]

All the named parameters can be set separately for Proﬁ le A and Proﬁ le B (Set \ Proﬁ le A(or B) \

Undervoltage - 27 \ U< Element (U<< Element) \ Setpoints menus).

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.

[2]

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(x) menus (IN1 or INx matching).

Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu.

Note 2 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR-

ING section.

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

Fun-F27_S2.ai

RESET

U<<

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

Enable (ON≡Enable)

MMI

Disable 27 function by operator

≥1

(1≡DDI closed)

DDI state

(1≡upstream)

U<<disbyCB_OPEN

Brand	Thytronic
Model	NV10P
Category	Relays
Language	English

Thytronic NV10P User Manual

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Thytronic NV10P Specifications

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