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NC2 0 - Manual - 01 - 2015

FUNCTION CHARACTERISTICS

If the CLP function (Cold Load Pick-up) is enabled for element blocking, the selected threshold may

be blocked for an adjustable time interval, starting from the circuit breaker closure.

This operating mode may be select by setting ON-Element blocking the ICLP>> Mode and/or

ICLP>>> Mode parameters.

If the CLP function (Cold Load Pick-up) is enabled for threshold change, the selected threshold may

be changed for an adjustable time interval, starting from the circuit breaker closure.

This operating mode may be select by setting ON-Change setting the ICLP>> Mode and/or

ICLP>>> Mode parameters, whereas the operating thresholds within the CLP may be adjusted in-

side the Set \ Proﬁ le A(or B) \ Phase overcurrent-50/51 Fundamental \ I>> Element (I>>> Element) \ Def-

inite time menus.

For both operating modes the CLP Activation time parameters (tCLP>>, tCLP>>>) may be ad-

justed inside the Set \ Proﬁ le A(or B) \ Phase overcurrent-50/51 Fundamental \ I>> Element (I>>>

Element) \ Setpoints menus.

For every of the two thresholds the following block criteria are available:

Logical block (Block1)

If the I>>BLK1 and/or I>>>BLK1 enabling parameters are set to ON and a binary input is de-

signed for logical block (Block1), the concerning element is blocked off whenever the given input is

active.

[1]

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

50/51 Fundamental \ I>> Element (I>>> Element) \Setpoints menus, while the Block1 function must

be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus.

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

all-F50-51F.ai

General logic diagram of the phase overcurrent elements - 50/51 Fundamental

I>> inhibition

BLK1I>>>

I>>> Element

Start I>>>

towards

50/51RMS

towards

50/51RMS

Start I>>>

Trip I>>>

I>> disbyI>>>

Start I>>>

I> disbyI>>>

>>>

def

ICLP>>>

def

I>>>

def

ICLP>>>Mode

tCLP>>>

>>>

RES

I>> Element

Start I>>

Trip I>>

Start I>>

I>AL disbyI>>

Start I>>

I>AL disbyI>>

def

ICLP>>

def

I>>

def

ICLP>>Mode

tCLP>>

RES

I>> Enable

I>>> Enable

CLPI>>

CLPI>>>

I>>>BF

Trip I>>>

I>>>BF

I>>BF

I>> Trip

I>>BF

BLK2OUT

I>>BLK2OUT

Start I>>

BLK2OUT

I>>>BLK2OUT

Start I>>>

Start I>>

I> disbyI>>

BLK1I>>

I>>BLK1

Block1

Start I>>

I>>>BLK1

Block1

Start I>>>

I>>BLK2IN

BLK2INI>>

Block2

Start I>>

I>>>BLK2IN

Block2

BLK2INI>>>

Start I>>>

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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