ABB CIRCUIT SHIELD 87T Manual de usuario

ABB

7.6

1.7

Issue

INSTRUCTIONS

Transformer

Differential

Relay

CIRCUIT

SHIELD

Catalog

Series

219

Standard

Case

TYPE

Catalog

Series

419

Drawout

Test

Case

TYPE

PIFFEBENT

]

MINIMUM

RtSTBAM

’

niFKESfcNTIM

ASEABBOWBOfWj

BFSTRA

;

HARMONIC

yCl

MEBTZ

’

CAT

TWO

WINDING

RELAY

Courtesy of NationalSwitchgear.com

7.6

1.7

Page

Transformer

Differential

Relay

TABLE

CONTENTS

Introduction

Precautions

Placing

Relay

into

Service

App

ication

Data

Maintenance

and

Testing

Page

INTRODUCTION

These

instructions

contain

the

information

required

properly

install

operate

and

test

the

ABB

Circuit

Shield

Type

single

phase

Transformer

Differential

Relay

These

mounting

the

case

and

clearly

numbered

relays

are

housed

case

suitable

for

conventional

semi

flush

panel

All

connections

the

relay

are

made

terminals

located

the

rear

Relays

with

catalog

numbers

starting

with

419

are

similar

function

relays

the

earlier

219

series

but

offer

totally

drawout

construction

with

integral

test

faci

ities

and

blade

assembly

upon

removal

the

relay

from

its

case

are

partial

drawout

construction

with

the

input

transformers

remaining

the

case

upon

withdrawal

the

lower

electronic

circuit

board

Current

transformer

shorting

accomplished

direct

acting

spring

Units

the

219

series

PRECAUTIONS

The

following

precautions

should

taken

when

applying

these

relays

Incorrect

wiring

may

result

damage

diagram

before

energizing

correct

polarity

sure

wiring

agrees

with

the

connection

sure

that

the

control

voltage

applied

the

Apply

only

the

rated

control

voltage

marked

the

front

panel

not

attempt

change

current

tap

setting

while

the

relay

service

This

likely

cause

the

relay

trip

due

the

mismatch

created

(

Pulling

the

tap

does

not

open

the

circuit

)

control

wiring

insulation

test

High

voltage

tests

are

not

recommended

required

withdraw

the

unit

from

its

case

before

applying

the

test

voltage

test

instructions

verify

that

the

relay

proper

working

order

CAUTION

since

troubleshooting

entails

working

with

energized

equipment

care

should

taken

avoid

personal

shock

Only

competant

technicians

familiar

with

good

safety

practices

should

service

these

devices

PLACING

THE

RELAY

INTO

SERVICE

RECEIVING

HANDLING

STORAGE

Upon

receipt

the

relay

(

when

not

included

part

switchboard

)

examine

for

shipping

damage

loss

evident

file

claim

once

and

promptly

notify

Asea

Brown

Boveri

Use

normal

care

handling

avoid

mechanical

damage

Keep

the

relay

clean

and

dry

INSTALLATION

the

outline

dimensions

and

panel

drilling

are

given

Figure

Mounting

Courtesy of NationalSwitchgear.com

Transformer

Differential

Relay

7.6

1.7

Page

Connections

Typical

connection

diagrams

for

two

and

three

Internal

connections

Figure

winding

transformers

are

shown

Figures

and

Special

care

should

taken

connect

the

control

power

the

proper

polarity

These

relays

have

metal

front

panel

which

connected

through

printed

circuit

board

runs

rear

terminal

marked

all

applications

this

terminal

should

wired

ground

The

relay

includes

external

resistor

which

supplied

mounted

the

case

and

wired

between

terminals

and

operation

This

resistor

must

connected

for

proper

Note

Connections

are

critical

this

application

Most

problems

experienced

during

commissioning

are

due

incorrect

connections

interchanged

phases

polari

ties

incorrect

make

the

delta

connections

Using

the

transformer

nameplate

drawing

the

reference

phasing

check

should

made

sure

that

the

secondary

connections

are

made

properly

for

the

particular

transformer

winding

configuration

case

difficulty

during

commissioning

plug

test

unit

available

loan

from

the

factory

aid

analyzing

connection

problems

;

however

significant

load

current

must

flowing

use

this

device

SETTINGS

Procedures

for

calculating

settings

for

particular

installation

are

given

the

Application

section

CURRENT

TAPS

The

secondary

currents

seen

the

relay

are

usually

unequal

due

the

primary

secondary

’

the

primary

and

secondary

sides

the

transformer

ratio

the

transformer

being

protected

and

the

choice

ratios

for

the

The

tap

settings

are

selected

equalize

the

input

currents

seen

the

differ

ential

measurement

unit

the

relay

The

tap

values

and

ratios

provided

are

shown

Table

Setting

calculations

will

determine

the

tap

selection

required

for

the

high

side

and

low

side

inputs

important

identify

which

input

terminals

the

relay

are

connected

the

high

side

’

and

the

low

side

’

these

Then

when

making

settings

relate

the

front

panel

tap

the

input

current

terminals

affects

the

left

side

tap

for

input

terminals

the

right

side

tap

for

terminals

and

the

center

tap

(

winding

units

)

for

input

terminals

DIFFERENTIAL

The

ABB

Circuit

Shield

Type

relay

operates

when

its

input

currents

differ

magnitude

(

vectorial

)

The

operating

point

occurs

when

the

difference

expressed

percentage

the

smaller

exceeds

the

setting

The

percentage

differential

slope

setting

made

with

the

left

hand

front

panel

dial

illustrated

the

graphs

Figures

and

the

operate

current

relative

the

tap

value

This

continuously

adjustable

control

allows

settings

from

and

these

plots

the

vertical

axis

(

)

(

)

and

the

horizontal

axis

the

smaller

restraint

current

relative

tap

value

The

Percent

Differential

where

nto

and

nto

the

arger

restraint

current

the

tap

value

the

smaller

restraint

current

the

tap

value

Note

when

where

(

adjustable

)

Minimum

Restraint

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Transformer

Differential

Relay

7.6

1.7

Page

MINIMUM

RESTRAINT

(

Minimum

Operating

Current

)

The

minimum

operating

current

set

the

right

hand

dial

the

front

panel

which

continuously

adjustable

The

minimum

operating

current

value

determined

the

following

relationship

between

the

restraint

dial

setting

the

percent

differential

setting

and

the

current

tap

setting

(

100

)

differential

setting

adj

min

restraint

setting

tap

setting

minimum

operating

current

amperes

where

For

example

with

2.3

and

(

125

)

2.3

effect

varying

the

Minimum

Restraint

adjustment

graphically

illustrated

The

Figure

and

tabulated

this

chart

Restraint

Dial

Setting

Minimum

Operate

Current

Percent

Differential

Setting

tap

2.3

The

setting

that

provides

minimum

operating

current

would

typical

for

most

applications

INSTANTANEOUS

The

instantaneous

element

operates

directly

magnitude

the

measured

current

difference

This

internal

adjustment

factory

set

tap

but

may

adjusted

from

may

required

the

application

This

element

must

set

test

Refer

the

section

Testing

for

the

calibration

procedure

HARMONIC

RESTRAINT

The

harmonic

restraint

unit

blocks

relay

operation

transformer

energization

detection

the

second

harmonic

content

the

inrush

current

This

element

factory

set

restrain

second

harmonic

which

appropriate

for

most

applications

internal

calibration

adjustment

provides

range

approximately

and

may

set

test

Refer

the

section

Testing

for

the

calibration

procedure

Courtesy of NationalSwitchgear.com

Transformer

Differential

Relay

7.6

1.7

Page

APPLICATION

DATA

The

ABB

Circuit

Shield

Type

provides

high

speed

differential

protection

for

power

transformers

The

Type

single

phase

relay

set

three

relays

required

for

the

pro

tection

one

power

transformer

The

relay

offered

models

for

the

protection

two

winding

and

three

winding

transformers

The

relay

has

linear

percentage

differential

characteristic

order

accomodate

ratio

mismatch

the

operation

load

tap

changers

and

errors

high

fault

currents

external

the

protected

zone

Controls

are

provided

the

front

panel

adjust

the

slope

(

)

and

the

minimum

operate

current

second

harmonic

restraint

unit

prevents

relay

operation

transformer

magnetizing

inrush

current

content

but

may

adjusted

required

This

unit

factory

calibrated

restrain

second

harmonic

unrestrained

instantaneous

unit

which

operates

the

magnitude

the

difference

current

provided

back

the

percentage

differential

unit

The

instantaneous

unit

factory

set

tap

but

may

adjusted

(

)

the

field

The

relay

has

ratio

correcting

taps

therefore

external

auxiliary

’

will

not

The

high

continuous

rating

each

tap

gives

the

user

The

low

burden

the

relay

(

see

table

)

provides

usually

required

flexibility

selecting

taps

improved

performance

procedure

for

calculating

the

relay

settings

for

particular

application

follows

page

MOTE

DIMENSIONS

ARE

8.36

213

6.56

6.66

1.19

175

167

30.2

PANEL

4.68

124

2.44

FRONT

VIEW

(

)

HOLES

SIDE

VIEW

•

[

3.69

PANEL

CUTOUT

000

1.64

Uio

“

iias

52.4

DRAMfOUT

TEST

CASE

STUD

NUMBERS

(

BACK

VIEW

)

3.19

81.0

6.62

168

Figure

Relay

Outline

and

Panel

Drilling

Courtesy of NationalSwitchgear.com

7.6

1.7

Page

Transformer

Differential

Relay

Specifications

Input

Circuits

Ratio

Matching

Taps

Continuous

rating

Second

rating

Burden

see

Table

see

Table

200

Amperes

any

tap

see

Table

Percentage

Restraint

Element

Minimum

operate

current

adjustable

tap

setting

Slope

adjustable

Refer

Figures

and

Instantaneous

Element

Internally

adjustable

tap

Factory

set

tap

Harmonic

Restraint

Element

Restrain

harmonic

Internally

adjustable

approximately

Factory

setting

Operating

Time

See

Figure

Output

Contact

Rating

125

vdc

250

vdc

closing

tripping

continuous

break

0.3

0.1

Operating

Temperature

Range

models

available

for

125

vdc

0.05

max

drain

110

vdc

0.05

max

drain

250

vdc

0.05

max

drain

220

vdc

0.05

max

drain

vdc

0.05

max

drain

vdc

and

vdc

Control

Voltage

(

allowable

range

100

140

vdc

)

(

allowable

range

125

vdc

)

(

allowable

range

200

280

vdc

)

(

allowable

range

176

250

vdc

)

(

allowable

range

vdc

)

see

note

below

and

page

TABLE

CATALOG

NUMBERS

COMMON

UNITS

Control

Voltage

Catalog

Numbers

Std

Case

Test

Case

System

Freq

Type

Windings

vdc

Ovdc

125

vdc

250

vdc

Two

219

2431

219

2401

219

2441

219

2451

419

2431

419

2401

419

2441

419

2451

vdc

Ovdc

125

vdc

220

vdc

219

2431

219

2401

219

2441

219

2421

419

2431

419

2401

419

2441

419

2421

vdc

Ovdc

125

vdc

Three

219

3431

219

3401

219

3441

419

3431

419

3401

419

3441

vdc

Ovdc

125

vdc

219

3431

219

3401

219

3441

419

3431

419

3401

419

3441

Select

419

series

units

for

new

applications

due

the

improved

testing

features

Notes

Contact

factory

for

availability

units

for

control

voltage

ratings

not

listed

Type

inverter

and

vdc

rated

see

page

For

vdc

control

use

Courtesy of NationalSwitchgear.com

Transformer

Differential

Relay

7.6

1.7

Page

Type

Tap

Ratios

TABLE

3.2

4.0

2.9

3.6

4.5

5.0

8.7

2.9

1.00

1.10

1.24

1.38

3.00

3.2

1.13

1.56

2.72

3.6

1.11

1.39

2.42

4.0

1.00

1.13 1.25

2.18

4.5

1.00

1.11

1.93

5.0

1.74

8.7

1.00

Continuous

Current

Ratings

TABLE

Burden

Data

Tap

Setting

Continuous

Rating

Tap

Setting

Ohms

2.9

3.2

3.6

4.0

4.5

5.0

8.7

2.9

3.2

3.6

4.0

4.5

5.0

8.7

0.05

0.04

1.0

Figure

Internal

Connection

Diagrams

419

Transformer

Differential

Relay

Drawout

Test

Case

Type

Transformer

Differential

Relay

Standard

Case

219

fccJ

fee

OlH

Oja

Notes

Omit

coil

for

two

winding

relays

The

tap

block

associated

with

coil

left

hand

side

when

viewed

from

the

front

the

relay

The

tap

block

for

coil

the

right

hand

side

provided

the

tap

block

for

coil

the

center

The

external

resistor

shown

connected

between

terminals

and

supplied

mounted

the

relay

and

must

place

for

proper

operation

The

diode

shown

between

terminals

and

used

for

testing

only

See

test

procedures

Courtesy of NationalSwitchgear.com

Transformer

Differential

Relay

7.6

1.7

Page

Connections

shown

for

Phase

Rotation

Connections

shown

for

Phase

Rotation

Delta

Wye

Transformer

Delta

Transformer

;

„

DLJL

LhJL

nnr

fsjt

)

ovo

Hki

ovo

Control

Power

Typical

Connections

for

Differential

Protection

Two

Winding

Three

Phase

Power

Transformer

Figure

Note

using

the

transformer

nameplate

drawing

reference

phasing

check

should

made

insure

that

the

secondary

connections

are

made

properly

for

the

particular

transformer

winding

configuration

Courtesy of NationalSwitchgear.com

961

Irirta

CSJ

9.5

“

(

)

[

1110

ovo

OVO

Control

Power

“

xlx

“

)

“

)

•

Figure

Typical

Connections

for

Differential

Protection

Three

Winding

Three

Phase

Transformer

Courtesy of NationalSwitchgear.com

Transformer

Differential

Relay

7.6

1.7

Page

CALCULATION

SETTINGS

procedure

for

calculating

the

relay

settings

follows

end

the

procedure

example

given

the

Determine

the

maximum

load

currents

the

transformer

the

high

side

and

the

side

Determine

the

maximum

through

fault

currents

IHF

and

ILF

Choose

the

ratio

accordance

with

step

give

approximately

secondary

current

the

maximum

load

current

;

and

also

that

the

maximum

external

fault

current

less

than

100

amperes

secondary

others

check

that

they

meet

the

requirements

above

applications

through

fault

current

limited

the

transformer

impedance

)

the

ratios

have

been

specified

(

Note

that

for

winding

Calculate

the

load

currents

the

secondary

side

IHS

and

ILS

remembering

multiply

for

Calculate

the

relay

currents

IHR

and

ILR

secondaries

connected

delta

Calculate

the

ratio

the

relay

currents

taking

the

arger

smal

Referring

Table

choose

the

taps

that

the

tap

ratio

(

)

closest

the

relay

current

ratio

(

)

Properly

assign

the

larger

and

smaller

value

tap

selections

the

high

side

and

low

side

relay

currents

culated

step

the

same

manner

(

)

was

cal

than

one

selection

taps

available

for

the

tap

ratio

desired

usual

practice

choose

tap

values

closest

the

normal

relay

currents

IHR

and

ILR

Check

that

the

relay

currents

are

within

the

continuous

rating

the

relay

refer

Table

(

)

(

sma

)

Select

the

slope

(

percentage

differential

)

setting

Both

the

mismatch

and

transformer

’

load

tap

changer

range

must

considered

LTC

security

the

setting

should

used

for

calculated

slopes

and

below

the

setting

for

calculated

slopes

Mismatch

Calculate

the

mismatch

the

For

and

Select

the

Instantaneous

setting

This

internal

adjustment

factory

set

tap

value

The

recommended

setting

approximately

times

the

power

transformers

self

cooled

load

current

rating

(

)

Calculate

the

relay

current

the

transformers

self

cooled

rating

(

)

Divide

the

high

side

relay

tap

value

(

)

Multiply

1.2

for

margin

Set

the

internal

potentiometer

119

using

the

calibration

procedures

given

the

section

Testing

The

maximum

burden

presented

given

the

performance

check

following

equations

2.3

for

wye

connected

’

3.4

for

delta

connected

’

(

this

includes

correction

factor

for

the

increased

resistance

the

leads

due

self

heating

effects

)

the

one

way

lead

resistance

from

the

relay

the

relay

burden

the

burden

other

devices

series

with

the

relay

where

(

See

Table

)

performance

should

satisfactory

the

maximum

external

fault

current

flowing

through

does

not

require

voltage

higher

than

one

half

the

ANSI

Class

accuracy

rating

the

Therefore

RIFS

must

satisfied

for

both

the

high

side

and

low

side

’

(

Note

multi

ratio

being

used

and

the

full

secondary

winding

not

being

used

then

adjust

the

rating

the

factor

account

for

the

lower

effective

“

rating

(

secondary

turns

used

;

total

secondary

turns

)

Minimum

operating

current

setting

giving

minimum

operating

current

would

usual

practice

See

chart

page

Courtesy of NationalSwitchgear.com

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