GE STD15C, STD16C Instructions Manual

INSTRUCTIONS

GE

K-45307K

TRANSFORMER

PERCENTAGE

TYPES

DIFFERENTIAL

AN!)

STD15C

RELAYS

HARMONIC

and

STD16C

WITH

RESTRAINT

GE

Protection

205

Great

Malvern,

and

Valley

19355-1337

PA

Control

Parkway

DESCRIPTION APPLICATION CALCULATION

OF Method Current

Transformer Determination Current

Percent I

II IA hA III

Transformer

Slope

Determination

Percent Repeat

Repeat

Percent

Ratio

-

Slope

RATINGS

Models

Auxiliary

12STD15B

Relay

CHARACTERISTICS

and

Pickup

Overcurrent

Percentage

Harmonic

Operating

Unit

Differential

Restraint BURDENS CONSTRUCTION

Current

Transformers Through—Current Differential-Current Overcurrent

Operating

Main

Seal-in

Target

and

Case RECEIVING, ACCEPTANCE

Visual

Mechanical

Electrical

Test

INSTALLATION

HANDLING TESTS

Inspection

Tests

Equipment

PROCEDURE

Tests

Pickup

Harmonic

Current

Through-Current

Instantaneous

Main

Dropout

of

Location

Mounting

Connections

ADJUSTMENTS

Plug

Tap

Percent

Positioning

Slope

OPERATION

Targets Disabling

of

MAINTENANCE

Contact

PERIODIC

Cleaning

TESTS

Pickup

Harmonic

Current

Through-Current

SERVICING RENEWAL

PARTS

SETTINGS

CT

of Setting

of

Error

Turns

CT

Percent

Setting

and

Control

Pickup

Restraint

Unit

AND

Restraint

Overcurrent

Unit

Setting

STD

Type

Restraint

GEK-45307

Connections

CT

and Ratio

and Error

Turns

Relay

Error

Turns Ratio

12STD16B

Circuit

Time

Characteristics

Circuit

Unit

STORAGE

Unit

Relay

Type

and

Tap

2

STD

Relay

Setting

Tap

Setting

3 3 5 5 5 5

6

8

8 9

9 10 10

10 10 11 ii 11

11

12

12 13 14 14 14

15 15 16

16

16 17 17 17

17

18

18 18 19 19 20

21

21 21 21

21

23

23 23

24

24 24

25 25

26

GEK-45

307

Relays features small

telephone-type

Percentage faults

the

by internal

Each

Type

used

for

current The

Type

three

has It

may

three the

circuits

weakest,

the

of

percentage

restraint

at

high

difference

fault,

STD

the

restraint

STD16C

through-current

also

be

needs

STD

current,

and

relay

protection

circuits

relay

used

require

WITH

type

and

relay

permits

while

in

waveform,

that

of

is

a

single-phase

is

for

four-circuit

through-current

no

through-current

TRANSFORMER

PERCENTAGE

STD15C

INTRODUCTION

transformer

are

harmonic

provides

that

accurate

harmonic

between

transformer

DES

of

two-winding

and

one

differential—current

designed

for

restraint

DIFFERENTIAL

AND

HARMONIC

and

STD16C

differential

restraint.

the

contact

discrimination

restraint

the

magnetizing

CR1

PTI

ON

unit.

The

power

use

with

circuits

and

transformer

restraint,

restraint.

RELAYS

RESTRAINT

relays

static

A

output.

between

enables

differential

inrush.

Type

STD15C

transformers

circuit.

three—winding

one

differential—current

protection

while

the

decision

the

current

relay

power

(see

provided

internal relay

and

Figure

fourth

unit

and

distinguish,

to

caused

is

designed

has

two

transformers

1)

circuit,

with

controls

external

through-

circuit.

when

by

to

only

being

the

a

an

be

and

The

current maximum transformer transformer selected

The

1.

the be available to

Since

increasing as accuracy

sensitivity

ratios

with

lower sensitivity.

compatible

increase

the

result

a

These

every

possible further the

purchaser’s

the

To

but

such

no

transformer

(CT),

the

following

the

relay

with

of

increasing

the

relay

the

of

the

1nstrucron5

ctingency

nforma

ton

purposes,

extent

required

assurance

without

or

the

in

the

However,

CT

ratio

burden

CT

ratio

reducing

CTs.

do

not

to

desi red

be

the

given

is

ratios

tap

some

purport

be

or

matter

the

with

risking

possibility

various

points

and

of

either

in

is

tends

the

met

in

should

products

respect

APPLICATION

and

in

the

lowest

the

preference

likely

to

maximum

to

cover

connection

parti

cular

be

described

to

relay

thermal

windings

mind:

lower

following

CT

to

improve

secondary

details

i.11

with

probleme

referred

herein

local

codes

3

taps

of

the

CT

ratio

to

be

installation,

to

meet

ratio

the

or

arise

the

and

should

overload

misoperation.

of

the

CT

ratio

and restrictions. or

the

relay

small the

compared

relative

fault

variations

General

applicable

ordinances

which

in

operation

are

Electric

ANSI,

because

be

of

power

selected,

the

relay

tap.

current

equipaent

not

Company.

selected

the

Therefore,

transformer

lowest

Where

tap,

to

performance

nez

IlntnCe.

or covered

ziWficiently

IEt

andN

varç

they

relay

the

relay

the

and

e

greatly.

to

higher

it

increasing

provide

Should

standards,

tap

a

is

lead

of

for

obtain

or

should

choice

desirable

the

current current

will may

burden,

CT5,

the

be

not

is

the

GEK—45307

2.

3.

4.

5.

6.

7.

CT

The

CT

The

should

The

the

The cooled

inrush under

secondary

relay

not

CT

ratios

relay

basis)

night

consideration

manufacturer

is

the

rating

inrush

The times

characteristics

current

rated current. less

than

sufficient

be

The

CT external exactly provided

within

it

is

5%.

obvious changing of

the

relied

when

upon

the

winding.

current

exceed

under

current

If

times

8

ratios

faults.

selection

by

the

on

When

range.

range

to

load-ratio

current

twice

should

maximum

corresponding

should

operate

should

of

self-cooled

a

transformer

relay

the

tap

current

tap

to

cause

should

Since

relay

the

that

a

In

and

the

prevent

should

corresponding

tap

value,

high

be

enough

internal

not

exceed

the

instantaneous

does

be

not

consulted

transformer

as

the

transformer

tap

chosen

current,

transformers

it

current

means

the

restraint

selected

is

rarely

value,

false

be

of

by

protected

close

this

match

case,

percentage_differential

relay

control

is

operation at

not

exceed

to which

that

fault

to

rated the

have

for

must

with

harmonic

to

transformer

of

which

transformer

cannot

the

secondary

the

ends

the continuous

maximum

is

the

conditions

kVA

relay

overcurrent

self—cooled

a

the

“equivalent

that

being

be

error

an

produce

content

on

internal

provide

possible

the

be

obtained

on

of

kVA

the

thermal

secondary

of

tap

considered.

able

an

to

ratios,

currents

is

equipped

currents

characteristic

the

(on

(refer

the

power

value

unit).

would

to

of

less error of faults.

balanced

match

at

unbalanced

range.

thermal

forced-cooled

a

rating

of

currents

to

RATINGS).

transformer

selected

If

rating, self—cooled have

the

supply

than

of

the

20%

greater

secondary

the

ratio—matching

may

usually

with

all

are

load-ratio

points

matched

current

the

will

the

same

of

rating

relay.

not

(on

(magnetizing

transformer transformer

rating”;

magnetizing

relay

the

of

than current

current

currents

taps

be

matched control

of

the

at

the

relay

which

of

the

basis)

damage

self-

that

with

total

20%

may

are

ratiomiddle

flows

8

at

on

is

In

8. voltage

for selected load current. voltage) restraint

It

is

not

differential

In

addition,

false

operation “sympathetic tend

to

harmonics Typical

and

3.

some

applications,

or

example

so

current

desirable

protection,

if

inrush”

flow

between

in

the

elementary

low

in

that

It

is

breakers

on

heavy

the

on

relay

diagrams

voltage

ring—bus

a

the

flowing

recommended

be

through-fault

to

since

banks

magnetizing

into

the

banks,

current

the

system

secondary

around

connected

protect

can

the

for

power

through

arrangement.

the

that

two

the

sensitivity

be

switched

inrush

bank

already

with

to

restrain

the

STD15C

transformer

windings

ring

CTs

to

a

current

parallel

the

possibility

4

four

in

on

each

separate

flowing

separately,

to

energized.

the

and

breakers

this

In

will

addition

of

transformer

of

the

one

relay.

STD16C

will

be (as

case,

not

be

the

restraining

around

protection

there

transformer

In

that

there

are

connected

shown the

thermally

to

the

two low

the

ring

banks

is

this

case,

will

illustrated

in

ratios

CT

overloaded transformer voltage

winding

bus.

with

would

possibility

a

bank,

the

be

to

the

Figure

must

(or

to

one

set

reduced.

be

causing

harmonics

insufficient

in

Figures

high

1)

load high

assure

as be

on

of

a

2

GEK—45307

METHOD

The

calculations

below.

CURRENT

sample

A

TRANSFORMER

Power

DETERMINATION

Determine

1. transformer

transformer.

Max.

required

calculation,

CONNECTIONS

Transformer

Delta-Wye

Wye-Del

Delta-Delta

Wye-Wye

Delta-Zigzag shift

between

secondary

CT

the

TURNS

maximum

OF

winding

—

Maximum

-

CALCULATION

for

determining

for

Connections

the

OF

the proper

transformer

SETTINGS

shown

Current

relay

Figure

in

Transformer

and

taps

CT

4,

Connections

outlined

are

is

then

given.

Wye-Delta Del

ta

ta-Wye Wye—Wye Delta-Delta

with

primary

TYPE

AND

line currents

may

carry

Transformer

(Line

phase

O

and

STD

RELAY

the

TAP

(Max.

maximum

SETTING

I)

forced—cooled

kVA

kV)

Delta—Delta

on

the

basis

rated

that

each

kVA

of

power

the

2.

3.

Determine power

transformer

transformer,

100%

Actually, carry of

these

calculating

voltage so

that

Select not

CT

exceed transformer selected current

be

3

times

properly

can than

For

the

full—load

or

the

—

100%

‘P

-

this calculation

maximum

the

ratings.

the

relay

in

ratios

the

so

either

is

that

so CT connected

the

matched

lowest

Wye-connected

Tap

Current

winding

“equivalent”

Transformer

(Line

load

currents

This

will

not

that

secondary

CT

breaker.

current).

CTs

=

rated

may

currents

is

the

operate

the

to

thermal

by

means

100%

line

carry

self-cooled

kVA

kV)

does

in requirement

secondary

thermal

ring

a

rating

Also,

I

currents

the

not

mean

continuously.

the

other

for

any

current

rating

bus,

will

select

of

the

relay

(100%

full

ratings.

that

windings

for

external

(5

for

not

CT

ratios

I)

self-cooled

windings

all

This

selecting

fault.

corresponding

amperes).

example,

exceeded

be

so

taps.

(Highest

on

is

in

the

that

the

rated

only

proportion

relay

the

to

In

CT

by

the

basis

will

a

convenient

maximum

the

ratio

the

relay

current

that

kVA

necessarily

to

tap

case

where

should

maximum

currents not

each

of

their

setting

does

Ip

load

more

the

way

a

be

5

For

Delta-connected

GEK-45307

CTs

4.

5.

Current

Tap where

Check as

low

the

as

Calculate determine differences of

mismatch.

three-winding

For

for

all

combinations

If

taps

limits,

lines,

Check relay amperes the

cannot

it

to

for

RMS

relay

accommodated

(Amperes)?

N

is

matching

possible.

the

percentage

ratio

the

between

The

will

obtain

see

that

fault

a

for

can

be

in

=

the

number

of

these

mismatch

transformers,

of

be

selected

necessary

be

a

better

the

at second.

1

definitely

accordance

seconds

x

LnL

N

relay

of

the

currents

match

sum

of

CT

currents

mismatch

two

relay

ratios,

normally

to

of

the

terminals

If

the

limited

with

48,400

secondary

divided

should

the

percent of

or

taps.

keep

choose

between

relay

period

to

the

relation:

to

as

currents

this

relay

of

the

a

turns.

relay

follows:

by not

percentage

different

a

currents

power

during

shorter

taps,

and

the

exceed

mismatch

currents

which

time,

to

keep

two—winding

on

the

tap

smaller

5%.

error

CT

and

will

that

transformer

a

values

ratio,

ratio

relay

fault

higher

the

should

within

be

is

current

mismatch

transformers,

selected.

the

is

be

one

on

taps.

applied

less

current

error

percent

checked

allowable

or

more

to

than

flows

can

The

the 220

in

be

Also external

CURRENT

CT

The

is tap figure

The

ratio

based

rating.

must

calculations performance transformer the

protected

Determine

1.

a.

b.

check

that

fault

TRANSFORMER

on

error

the

If

be

must

instantaneous

the

reduced,

listed

is

concerned,

winding,

transformer.

the

burden

For

Wye-connected

=

For

Delta-connected

=

2B

Z

the

do

not

RATIO

ERROR

be

instantaneous

as

below

which

with

none

on

+

Ne+2f

+

Ne

1000

of

suni exceed

less

unit

described

of

each

CTs

+

CTs

+

2f

+

than

are

is

2R

the

150.

being

the

CT,

20%

unit

in

for

an

using

Ohms

multiples

at

set

pickup

the

the internal fault

times

8

at

its is

CHARACTERISTICS

worst—fault

ground

current

the

following

of

tap

relay

normal

raised

supplied

current

rated

setting,

above

section.

condition,

fault

expressions:

this

between

through

on

tap

an

current.

which

value,

as

the

(Equation

internal

is

far

and

CT

neutral

8 the

This

times

as

1)

2)

or

20%

CT

the

of

6

GEK-45307

where

STD

B

N e

f

R

TAPS

2.9

3.2

3.5

3.8

4.2

4.6

5.0

8.7

STD

=

number

bushing

busing

one-way

AMPS

relay

of

total

turns

CT

tempera

CT

ture) resistance

temperature)

control

temperature)

Total

X

8

burden

in

resistance

cable

Burden

TAP

AMPS

23.2

25.6

28.0

30.4

33.6

36.8

40.0

69.6

(see

bushing

per

lead

TABLE

for

Table

CT

turn,

lead,

resistance

I

60

Cycle

BURDEN

I)

milliohms

Relays

OHMS

0.180

0.156

0.140

0.120

0.112

0.096

0.088

0.048

(at

(B)

(at

maximum

(at

maximum

MIN

expected

P.U.

0.87

0.96

1.05

1.14

1.26

1.38

1.50

2.61

AMPS

2.

3.

4.

5.

Determine

(Note: current relay CTs

Determine

Esec

From

excitation

determine

Esec. Determine

%

should

This necessary calculations error.

CT

=

8

are secondary

=

excitation

the

error

to

secondary

x

STD

For is

current

connected

IZ

curve

percent

1

E

=

Is

not

exceed choose on

selection

relay

the

supplied

are

CT

of

current

error

100

X

a

higher

current

tap

location

by

the

in

voltage

particular

20%

of

same,

wye

in

of

for

rating

of

one

CT,

or

required

corresponding

IE.

each

any

tap

on

relay

times

8

fault

so regardless delta.)

tap

by

CT

of

set

that

taps,

tap

assumed, that

at

8

of

current

the

CTs. set

of

mismatch

setting.

all

current

CT of

whether

times

tap

transformer

this

to

expression:

it

If

CTs,

error,

the

and the

setting.

secondary

does, and

fault

it

repeat

and

being

will

the

percent

used,

voltage,

be

ratio

7

GE:K-45307

PERCENT The

proper

a.

The

tap

The

b.

Set

the

The

percentage total total

20%, If

should

error

but

the

be

EXAMPLE

I.

Determination

1.

2.

3.

4.

5.

6.

7.

8.

SLOPE

percent

maximum

changing maximum

desired

not

movable

chosen

(REFER

Transformer Maximum 100% Assume Maximum 100% CT Relay

SETTING

range

means,

percent

slope current current

the

35%,

lead

about

TO

FIGURE

I

=

Ip

CT

I

secondary

I

connections

Current

slope

of

setting

the

to

does

40%

is

used

twice

of

CT

and

=

3750/

3000/

turns

secondary

required

manual

in

of

slope

smaller

not

setting

4) Turns

Line

J

(N)

for

taps

percent.

mismatch

by

means

selected

exceed

in

(as

as

high,

and

(Line

J3

(Line

(less

I

100%

is

determined

of

20%,

is

used.

Figure

since

STD

kV)

than

Sec.

and

the

of

should the

the

Relay

5a)

by

the

load—ratio-control,

relay

R3

through

1,

the

(See

be

25%

for

Tap

taps.

Figure

greater

currents.

setting

example)

movable

Settings

the

sum

than

lead

A

19.7

15.7

20

0.98

0.79

Delta

1.37

6A).

is

of:

the In

used.

the

provides

B

49.5

39.6 20

Wye

ratio

general,

percent

2.47

1.98

or

If

automatic

of

maximum

if

it

exceeds

slope

no

restraint.

C

157

125

60

2.62

2.08

Delta

3.60

the

setting

10.

11.

9.

Select

currents

If

any

chosen

Ideal

Try

Relay

Check Ratio

1.98

-

—

1.37 Mismatch

Ratio

Mismatch

a

relay

in

current

for

it,

Relay

Taps

Mismatch of

Taps

1.44

of

Taps

1.89

other

Taps

on

-

on

-

1

tap

lines

is

and

(Set

Error

Lines

43

LinesC-B

1.82

8

for

greater new

C

=

one

would

ideal

B-A

0.7%

-!.j-

3.8%

8.7)

than

relay

of

the

line

be

if

they

times

V3

taps

=

1.43

1.89

Ratio

=

calculated

Ratio

currents

were

any

3.31

3.2

of

Sec.

increased

other,

Sec.

Line

and

for

4.78

Lines

the

4.6

Currents

calculate

in

the

8.7 other

Currents

tap

8.7

same

should

lines.

what

=

the

ratio.

be

1.82

8

GE

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Bushing

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GEK—45

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and

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220

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OVERCURRENT

The transformer flowing

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in

Figure

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CHARACTERISTI

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to

zero

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the

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transformer

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the

throughcurrent

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from

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to

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on

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pickup

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current

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rated

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RESTRAINT

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Figure

CHARACTERISTICS

transformer

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primary

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for

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power

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made

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12

GEK—45307

current

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of

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the

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CYCLE

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CONTROL

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CIRCUIT

RELAYS

IMPEDANCE

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220

80

—

Figure Refer

identify

6

also

shows

the

to

parts

the

internal

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arrangement

connection

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GEK—45307

CONSTRUCTION

the

of

diagrams,

components

Figures

10

of

and

the

STD15C

11,

which

relay.

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CURRENT

In

one

and

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The block

TRANSFORMERS

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each

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Type

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with

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both

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connected

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inserting

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marked

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winding

transformer

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the

lead.

STD15C

relay,

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No.2terminates

one No.

relay,

primary

2

STD16C

only

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stud

to

circuit

5.

of

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in

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percent

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RENEWAL

parts

broken

should

or

the

of

the

serial

the

be

may

General

the

contacts

contact Wipe

be

PARTS

damaged.

nearest

part

number,

found

Electric

operation

correctly

are

should

contact

should

approximately

screw

contacts

kept

be

Sales

wanted,

of

stamped

Company

be

and

should

in

Office

quantity

the

on

before

adjusted.

have

a

by

approximately

0.005 the

inch.

pole

make

stock

for

of

relay

Instantaneous

the

requisition

installation,

of

gap

deflecting

piece,

before

the

required,

for

which

number

0.010-

0.005

Check

prompt

General

the

by and the

and the

unit

on

Since

the

edition,

last

Current

equation

the

Measurement

has

and

been

Figure

26

cahnged

has

7b

in

been

the

section

added.

Unbalance

on

Ti

2.9

3.2

3.5

3.8

‘4.2

4.6

5.0

8.7

tAPS

T2

Slopes

Currents

13 Ii(min)

Ij(max) 13

itmin) j(mx)

3 i(mn)

i(max)

13 Ij(Tnin) 11

(mau) 13

Ij(rnin)

1i(max) 13

li(mln)

(max)

11 13 1l(nin)

1i(max) 13

J1(min) I1(niax)

17.4

2.6

2.9

GEK—45307

TARLE

VI

15 25

11.4

17.4

4.6

5.0

19.2 19.2

2.9 4.8

3.2

17.4 17.4

6.6

9.5 6.7

7.1 10.3

5.3

19.2

7.7

8.5

40

2.9

iS

25

40

17.4

4.3

7.0

4.8

7.7

7.1

19.2

21.0

4.9

5.3

3.1

3.5

15

3.5 25

17.4

17.4 17.4

8.8

12.0

9.4

12.8

19.219.219.2

7.0

10.2

7.5

11.0

21.0

5.2

5.11

8.4

9.3

40

15

8.8

9.2

7.0

7.4 9.9

21.0

5.2

5.6

22.8

3.4

3.8

—

3.8 25

17.4 17.4

11.1

14.5

11.7 15.4

19.2

9.3

21.0

7.5

8.1

22.8

5.7

6.3

40

17.4

11.6

12.0

19.2

12.7

9.8

13.5 10.2

21.0

10.9

8.0

8.4

11.8

22.8

9.1

6.2 8.7

10.0

6.6

25.2

3.8

4.2

15

17.4

14.1

14.8

4.2 25

17.4

17.9

18.9

19.2 19.2

12.3

16.1

13.0

17.1

21.0

14.3

10.5

11.2

15.3

22.8 22.8

12.5

9.4

13.5 9.4

25.2

6.3

10.1

7.0

11.1

40

15

17.4

14.3

14.8

19.2

12.5 15.3

13.0

21.0

10.7

11.2

22.8

8.9

25.2

6.5 9.3

7.0

27.6

4.1

4.5

4.6 25

17.4

17.1

21.2

17.8 22.4

18.2

16.0

21.0

13.5 17.6

14.2 18.8

22.8

11.7

12.4

25.2 25.2

10.0

27.6

6.9

7.6

19.2

19.4

20.6

21.0

22.8

15.8

17.0

13.4

14.6

27.6

11.0

12.2

40

1525

17.4

17.1

20.1

17.6

20.9

19.2

15.3

15.8

21.0

13.5 16.5

14.0

22.8

11.7

12.2

25.2

9.3

9.8

27.6

6.9 9.9

7.4

30.0

4.5

5.0

17.4 17.4

24.6

25.8

18.2

18.3

19.1

21.0

17.3

22.8

14.7

15.5

25.?

12.3

13.1

27.6

10.7

30.0

7.5

8.3

40

19.2

22.8

24.0

21.0

22.2

22.8

19.2

20.4

25.2 16.8 16.8

16.8

18.0

27.6

14.4

15.6

30.0

12.0 20.3

13.2

8.7

15 25

11.6

11.5

28.7

32.2

29.3 33.1 38.9

12.8

27.5

31.0 36.2

31.9

28.1

14.0 14.0

26.3

29.8

26.9

30.7

15.2 15.2 15.2

25.1

28.6

25.7 29.5 35.3

27.0

23.5

27.9

24.1

18.4 18.4

25.4

21.9

26.3

22.5

20.0 20.0

20.0

23.8

24.7 30.5

20.9

34.8

5.5

9.0

6.19.9

11.6

37.4

12.8

37.7

14.0

35.0

36.5

33.8

16.8

32.2

33.7

18.4

30.6

32.1

29.0

34.8

14.2

15.7

40

frAPs

I

T2

0.58

0.64

0.7

0.76I1

0.84

,

0.92I1

1.0

1.74

[

T2

Slopes

15 25

Currents

13

11(min)

Ij(max) 0.58

13 Ii(rnin)

1(max) 13

1i(rnin)

11

(mex)

13 (min) I(max)

13

11

(min)

ij(max)

(min) ii(max)

13 11(inin) 1i(max)

13 11(min)

ICmax)

3.5

0.52

0.58

3.5

0.86

0.96

40

3.5

1.4

1.54

15

3.5

0.92

1.0

3.8

0.58

0.64

0.64 25

3.5

1.32

1.42

3.8

0.96

1.06

3.5

1.9

2.06

3.8

1.54

1.7

40

0.7

15 25

3.5

1.76

1.88

1.52

1.04

1.16

3.5

2.4

2.56

3.8 2

2.2

1.68 1.04

1.86

1.34

1.42

3.8 3.8

0.98 1.4

1.06

4.2 4.2 4.2

0.62

0.7

TABLE

VIA

0.76

15 25

40

3.5

1.76

1.84

3.8

1.4

1.48

4.2

1.12

4.5

0.68

0.76

40 15

3.5

3.5 3.5

2.22

2.9

2.34

3.08

3.8 3.8

2.54

1.86

1.98

2.72

4.2 4.2 4.2 4.2

4.2

2.18

1.5

1.62

2.36

4.6 4.6 4.6

1.14

1.82 1.24

1.26

2.0

0.84

3.5

2.32

2.82

2.96

2.4

3.8

1.96

2.46

2.04

2.6

1.6

2.1

1.68

2.24

4.6

1.74

1.32 1.88

5.0

0.76

1.26

0.84

1.4

25

40

3.5

3.6

3.78

3.8 3.8

3.22

3.42

2.86

3.06 2.24 2.84

4.6

2.5

2.7

5.0

2.0 1.3

2.22

0.92

15

25

40

3.5

3.5 3.5

3.42

2.86

2.96

2.5

2.6

4.2 4.2 4.2

2.14

4.6

1.78

1.88

5.0

1.4

5.5

0.82

0.92 1.52

4.24

3.56

4.5

3.8

3.88 3.06

3.06

3.2

4.12

3.52

2.7

3.76

4.6 4.6 4.6 4.6

3.16

2.34

2.48

3.4

5.0

2.68

1.86

2.92

2.0

s.

5.5

1.38

2.2

2.44

1.0 25

15

3.5

3.5 3.5 2.3

3.42

4

3.52

4.18

3.8

3.66

3.16

3.82

4.2 4.2

3.3

2.7

3.46

2.8

2.34

2.94

2.44

3.1

5.0

1.86

2.46

1.96 2.62

s.s s.s

1.38 1.98

2.14

1.48

6.0

0.90

1.5

1

1.66

40

4.92

5.16

3.8

4.56

4.8

4.2

4.44

4.6

3.84

4.08 5.14

5.0

3.36

3.6

.s

2.88

3.02

6.0

2.4

2.64

1.74

152iU

2.3

574

6.44 7.4

6.62

5.86

2.56

3.5

6.2

5.62

6.38

2.8

5.26

5.96

5.38

6.14

3.0 3.0

5.72

5.0

5.9 7.0

3.36

4.7 5.4

4.82 5.58 .7

3.i

4.38

5.1 6.1

4.5

5.26

4.0

4.06 4.76

4.18

4.94

7.0 7.0

1.8

1.1

1.22

1.98

2.3

7.7

2.5

7.2

7.5

2.8 7

7.3

3.0

6.7

3.3

6.4

6.7 .7

6.4

4.0

5.8

6.1

7.C

2.8

3.1

27

GEK—45307

2

—

t

‘

2

ty

2

0

i uJ

—

-

.u—’-

-P

w

frLL

2D

F-LL

IlJIJ

-S.>-

2--i

U)o?fr

Figure

for

1

(0128B1982—3)

Four-Circuit

/

Elementary

Transformer

IC

Protection

28

Diagram

with

for

Three

STD16C

Restraints

Relays

GEK-45307

I—

2

_JI

•

I)

(I)

-

w

1:

.1:

-j

2

U

bi 0

I

Fl-

w

Ii,

U

‘1

I

U)

II

I

13C4

r-

Figure

2

(0128B1981-1)

for

Two-Winding

Elementary

Transformer

29

Diagram

Protection

for

STD15C

74

WCaJ

Relays

GEK-45307

3

U Cr

U 0

1-

j

>-

4

>-

—I

Ln

w

ut

Cr

cr

Cr

1L1

Ui

w

((012881980-2)

Figure

3

for

Three-Winding

Elementary

Transformer

30

Diagram

Protection

for

STO

16C

Relays

600/5

110

KV

GE

I

K—

45307

FKA

44

KV

1500—46

600/5

-w

Y

w

A

FK

Figure

[Al

439—115

4

3000

KVA KVA

3750

(0165176O1-1)

Y

COOLED

SELF FORCED

Transformer

AIR

FK—14.4

COOLED

Used

13.8

in

KV

Sample

600/5

Calculations

Figure

5

(0227A2503_o)

[ELY

Operating

[IFF

UTIA

Speed

31

VIIF

Characteristics

C

T

of

the

STD

Relay

GEK-45307

TARGET SEAL-IN

CAPACITOR

AMPLIFIER RECTIFIER PICKUP

RHEOSTAT

S

Figure

UNIT—

Cl—

1

CARD————-—

CARD—i

ADJuSTING—I

-

RI

RELAY

6A

(8042539)

Approximately

3/4

Relay

Front

Type

View

—INSTANTANEOUS

OVERCURRENT

UNIT

-DC VOLTAGE

—HARMONIC

ADJUSTING

RHEOSTAT-

—SLOPE

[Io

STD16C

(Left

CONTROL

ADJUSTING

RHEOSTAT

MATCHING

Out

Side)

TAP

LINKS

RESTRAINT

112

-113

of

Case

Figure

REACTOR

68

CARD

CARD IOARD

(8042544)

RECTIFIER

THYRITE

RECTIFIER TERMINAl.

Approximately

—.—REACTOR

P-CAPACITOR

12

C2

I

Relay

3/4

Back

32

Type

View

STD16C

(Right

Out

Side)

of

Case

80

10

\

1——-——

°1\

NOTE:

GEK-45307

FOR

THROUGH

OF

TRANSFORMERS, THE EVER EXPRESSED

TWO

THE

NCG1ING

IS

WINDING

CURRENT’

CURRENTS.

OR

SMALLER.

AS

A

TRANSFORMER

TAKEN

IS

FOR

IT

TAKEN

IS

OUTGOING

(EACH

MULTIPLE

CURRENTS, CURRENT OF

RELAYS

AS THE THREE AS

THE

TAP.)

SMALLER

WINDING

OF

SUM

WHICH

BE

TO

LiJ 0

(I)

Lii

::EEEEEEEEEE

(ii

a:

Lii

20__\

10

0

—

—._

2

4 THROUGH

—

6

CURRENT

15%.

8

MULTIPLES

IN

10

OF

TAP

12

—

14

16

Figure

7A

(0378A0588-3)

Low-Current

Slope

33

Characteristics

of

the

STD

Relay

TWO

THROUGH

SLOPE

RELAYS

OR

THE OF

MULTIPLE

A

SMALLER.

AS

INCOMING

IS

TRANSFORMERS,

THE

SMALLER

PERCENT

VS

CHARACTERISTICS

CURRENT

THROUGH

OPERATING

OF

THE

AS

TRANSFORMER

fAKEN

IS

WINDING

TWO

FOR

CURRENT

EXPRESSED

WINDING

WHICHEVER

SUM

BE

TO

THE

THREE

AS

FOR

CURRENTS

CURRENT

TAKEN IS

IT

EACH

CURRENT.

OUTGOING

TAR OF

m

a.

5

TAP OF

4

i.Th

—

MULTIPLES

[uh

IN

LLLLL

:L.1.......

NOTE:

I.

.1:

CURRENT

3

I

I:

I

I.

jiI

THROUGH

II

.1.

II

.iI

H

.I:

I.

:ç

:11

:1

—

I.

ii

.::

I

i

2

I

—1Ui(0

rz

Ui

80

100

-r

90

CD

-S

C

M

70

30

E

CD

0

-

R

(/)C

W

C

CD

—I_S

50

E

T

N

60

P

C

-

(D

o

40

P

L

0

S

-S

c-$

C-,

CD

-V

CD

20

-S

-.

CD

-S

C)

I0

C,

LI,

-J.

I,,

-q.

GEK-45307

vvvvvvvvvvvvvvml

Figure

(K-6209195-O)

8

I

Fault

TUPICAL

?4AC,NCTIZ!NG

Current

OFFSET

TUFICAI.

FAULT

CURRENT

TRAN5FOR’4ER

INRUSH

and

Transformer

CURRENT

WAVE

AVE

Magnetizing

Current

$

Waves

N13

‘Or’.

I

7

I’,

-J

a

:

NOTE

CR

—.2=TE4INL

Figure

Al.L

ALL

9

of

DY

NEAR

ICI

RES.

J/2Wj5$

CAP.

VALUES

IN

POINT

DV

P.C.

(0269A3039-3)

Sense

Amplifier

MFj

UNLESS

,.

OThERWISE NOTED

CARD

Internal

Printed

35

Connections

Circuit

Board

‘CI

Diagram

CO+4PON

TOP

VIEW

EN

T5

GEK-

45307

HARI4OflC

THYRITE

DIFFERENTIAL

OJRRENT

TRANSFORIER

RTR.

SENSE

AMPLIFIER

(o257A5o57)

T&

*=

-IORT

Figure

FINGER

10

(02571\5026-2)

THROUG-!

RESTRAINT TRANSFOR4ER

Internal

OJRR.

6

Connections

36

Diagram

for

Relay

Type

ECT!7i

NO.

LEAD

TXTNAI

BOi

STD1SC

TO

GEK-45307

I

(INST.

)

ThYRITE

DIFFERENTIAL Cu

RRENT

TRANSFORMER

HARMONIC

FR

EQ.

RESTRAINT

SEllS

E

AMPLIFIER

(o257A

5057)

t&aiI

±

TiT

**.

SHORT

FINGERS

Figure

11

(O257A5o27—1)

2

Internal

‘1

Connections

37

6 8

Diagram

for

SHORT

Relay

10

BRUSHES

Type

TO

STD16C

GEK-45307

CONNECTING

NOTE:AFTER TRAVELS THE

TERMINAL

AUXILIARY

ENGAGING

‘/4

INCH

PLUG

BEFORE

BLOCK

MAIN

BRUSH

AUXILIARY

ENGAGING

BRUSH

1

CONNECTING

TERMINAL

SHORTING

BRUSH

THE

MAIN

BL BAR

CONNECTING

BRUSH

BLOCK

PLUG

ON

Figure

12

(8024039)

Cross

Section

(Ej_

of

Drawout

O’

WI

Case

OF

Fl

Showing

ARROW

4RROW

TE9IEeODY

ON

Position

of

Auxiliary

Brush

Figure

13

(0148A2994-1)

Outline

38

of

Test

Rectifier

GEK-45307

LED

T&SI

I

S

$TANTM4US

TAT.

ND

1IO4E

Figure

OVEPaJRRENT

1’f.

SEAL-I$

REI4Y

14

(0165B2697-1)

TEST

c4N.

UUT

FOP

5TW6C

39

Test

Connections

Diagram

115

VOLTS

RATED

FREQUENCY

GEK—45

307

S

115

VOLTS

RATED

FREQUENCY

A.TE5T

-LJ

LOAD

BOX

OX

CIRCUIT

TEST

0148A2988

AL

FOR

RECTIFIFR

[I

2

AC

STDI5C

AC

DC

RELAYS

I

S4

:

RATED

CONTRCL

VOLTS

INDICATING LAMP

DC

.

i

TEST

B.

Figure

15

(0257J5O54-o

CIRCUIT

Using

FOR

Sh.1)

Type

STDI6C

Field

XLA

40

Test

RELAYS

Test

Plug

Connections,

in

Case,

\l

2’

22

c:

fl

I

fl

I

E-1

Is

EEi*LEH

1:

GEK-45307

I

4.0

(X)

ZFEZZEE

FIGURE

0,

LI,)

1-4--

“I—

LI,

—0

16

(418A

3

786-0)

4

LW—PASS

Relationship

with

I(DC)

5 CURRLNT

Between

set

6

A)APiRE

IN

(I)

Second

at

4.0

Amperes

Harmonic

and

By-Pass

Ij

SLOPE

40%

Current

-LL.

!EE

4._L;4-.-.

44-

U

Figure

17

(0178A8111-0)

U

10

Differential

.50

ThR0Uc1

CURRENTIN

Voltage

PERCENT OF

Operating

60

TAP

70

Characteristics

of

90

Type

STD

100

Relay

41

15. 384MM

1/4

4

6MM

1

0

375

263MM

125

DRILL

HOLES

5.187

131MM

-1-

125

1

29MM

CU1IUT

PANEL

SEMI-FLUSH

(6)

MTG.

/

6187 157MM

-H

I

7.406 180MM

L

14.

912

375MM

GEK—45301

LOCATION

SURFACE

10—32

X

SCREWS

.75

19MM

5/8

DRILL

4

HOLES

15MM

6

75Mj,j’

1

3/8

4

I.-I

I

13.01

i76MMh

8

31

211MMI

II

—(4)

1

STUDS

FOR

0—32

3.500 88MM

5/16-18 SURFACE

4

1

.

375

365MM

CUTOUT

DRILLED

—

__

STUDS

MIG.

STUD

NUMBERING

97531

00000

10

8

6

BACK

MAY

HOLES

4

FIà5MM

1

468

4

2

VIEW REPLACE

156

7.281 185MM

.218

5MM

FOR

TYPICAL

INCHES

MM

PANEL SEMi—FLUSH

FRONT

DIM.

Figure

DRILLING

VIEW

5.68

MOUNTING

18

(K6209273-5)

Medium

843

VIEW

FOR

PANEL

CASE

SHOWING

SURFACE

Single

218

‘5MM

Outline

End

,7I8,J

18MM

76MM

ASSEMBLY

MTG.

(Ml)

ON

and Case

/3/4

SILEL

Panel

of

/

10

HOLES

19MM

5/16-18

OF

HARDWARE

PANELS

Drilling

Relay

5

133MM

DRILL

Type

6MM

—

.

25

PANEL

FOR

SURFACE

FRONT

STUD

Dimensions STO

I

I—.

DRILLING

for

.500 12MM

(TYPICAL)

MOUNTING

VIEW

42

GE

Power

Management

Anderson

215

(905)

Ontario

L6E

294-6222

201-2098

Markham, Canada Tel:

(905)

Fax: www.ge.comli

Avenue

1B3

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