GE SPA11A Manuale utente

GEK

65512

INSTRUCTIONS

STATIC

PILOT

WIRE

MONITORING

RELAY

TYPES

SPA

Protection

and

Control

205

Great

Valley

Parkway

Malvern

19355

1337

Courtesy of NationalSwitchgear.com

GEK

65512

CONTENTS

PAGE

INTRODUCTION

APPLICATION

OPTIONS

AND

FEATURES

RATINGS

TEMPERATURE

DIELECTRIC

STRENGTH

CONTACTS

TARGET

SEAL

UNIT

SEISMIC

CAPABILITY

CHARACTERISTICS

OPERATING

PRINCIPLES

OPEN

PILOT

WIRES

SHORTED

PILOT

WIRES

GROUNDED

PILOT

WIRES

OPERATING

TIMES

TRANSFER

TRIP

LOW

PASS

FILTER

BURDENS

SETTINGS

CONSTRUCTION

RECEIVING

HANDLING

AND

STORAGE

ACCEPTANCE

TESTS

VISUAL

INSPECTION

MECHANICAL

INSPECTION

CRADLE

AND

CASE

BLOCKS

TARGET

SEAL

UNIT

(

SPA

AND

)

TELEPHONE

RELAYS

ELECTRICAL

INSPECTION

250

RATING

SENDING

END

UNDERCURRENT

DETECTION

(

SPA

AND

)

OVERCURRENT

DETECTION

(

SPA

AND

)

GROUND

DETECTION

(

SPA

AND

)

TRANSFER

TRIP

(

SPA

)

RECEIVING

END

UNDERCURRENT

DETECTION

(

SPA

AND

)

TRANSFER

TRIP

(

SPA

)

DIELECTRIC

TESTS

(

HIGH

POTENTIAL

TESTS

)

INTRODUCTION

HIPOT

TESTS

RESTORING

RELAY

SERVICE

INSTALLATION

PROCEDURE

SETTING

THE

TAP

THE

TARGET

SEAL

UNIT

(

SPA

AND

)

SUPPLY

VOLTAGE

SETTING

TERMINAL

ARRANGEMENT

SETTING

PERIODIC

CHECKS

AND

ROUTINE

MAINTENANCE

CONTACTS

ELECTRICAL

TESTS

SERVICING

TELEPHONE

RELAYS

TARGET

SEAL

UNIT

RENEWAL

PARTS

LIST

ILLUSTRATIONS

Courtesy of NationalSwitchgear.com

GEK

65512

STATIC

PILOT

WIRE

MONITORING

RELAY

TYPES

SPA

INTRODUCTION

The

Type

SPA

static

pilot

wire

monitoring

relays

are

designed

for

use

conjunction

with

SPD

pilot

wire

system

provide

detection

open

shorted

reversed

grounded

pilot

wires

The

relays

are

powered

dual

rated

self

contained

isolated

power

supply

reduce

the

possibility

battery

grounds

interfering

with

operation

the

pilot

wire

scheme

Models

are

available

with

110

125

volt

ratings

The

Type

SPA

and

SPA

relays

provide

the

basic

pilot

wire

monitoring

functions

The

SPA

the

sending

end

relay

and

operates

conjunction

with

Type

SPA

receiving

end

relay

the

remote

terminal

(

terminals

)

two

(

three

)

terminal

lines

These

relays

will

contacts

and

operate

light

emitting

diode

(

LED

)

when

abnormal

pilot

wire

condition

detected

The

Type

SPA

and

SPA

relays

include

provisions

for

the

transmission

and

reception

direct

transfer

trip

signals

either

direction

well

the

basic

pilot

wire

monitoring

functions

The

SPA

monitoring

scheme

uses

low

level

signal

order

avoid

interfering

with

the

primary

pilot

wire

signal

(

SPD

relays

)

Within

the

SPA

relays

the

monitoring

signal

separated

from

the

signal

low

pass

filters

SPA

models

are

available

for

use

with

hertz

and

hertz

SPD

relays

The

Types

SPA

and

SPA

are

each

packaged

the

drawout

case

the

outline

and

panel

drilling

which

shown

Figure

APPLICATION

The

Type

SPA

static

relays

are

intended

for

application

pilot

wire

monitoring

relays

and

transfer

trip

relays

noted

above

they

are

designed

specifically

for

use

with

the

SPD

pilot

wire

relaying

system

When

only

the

monitoring

function

desired

the

Type

SPA

required

one

end

the

pilot

circuit

designated

the

sending

end

;

and

the

Type

SPA

required

the

remote

receiving

end

both

remote

ends

the

case

three

terminal

line

The

SPA

relay

the

sending

end

circulates

low

level

current

around

the

pilot

loop

which

holds

the

contacts

the

undercurrent

(

)

functions

both

the

sending

end

and

These

instructions

not

purport

cover

all

details

variations

equipment

nor

provide

for

every

possible

contingency

met

connection

with

installation

operation

maintenance

Should

further

information

desired

should

particular

problems

arise

which

are

not

covered

sufficiently

for

the

purchaser

’

purposes

the

matter

should

referred

the

General

Electric

Company

the

extent

required

the

products

described

herein

meet

applicable

ANSI

IEEE

and

NEMA

standards

;

but

such

assurance

given

with

respect

local

codes

and

ordinances

because

they

vary

greatly

Courtesy of NationalSwitchgear.com

GEK

65512

receiving

end

relays

the

open

position

open

pilot

wire

will

result

the

closure

the

contacts

and

operation

the

LED

both

the

sending

and

receiving

ends

shorted

pilot

wire

resulting

significant

increase

the

monitoring

current

will

result

closure

the

contacts

the

overcurrent

(

)

function

and

operation

the

LED

the

sending

end

relay

and

the

closure

the

function

contacts

the

receiving

end

grounded

pilot

wire

circuit

will

result

closure

the

contacts

the

ground

detection

function

and

operation

the

ground

indicating

LED

the

sending

end

relay

Specific

information

the

magnitude

the

circulating

current

and

operating

levels

the

and

ground

detection

functions

provided

the

section

CHARACTERISTICS

Elementary

diagrams

for

the

two

terminal

and

three

terminal

applica

tions

the

SPA

and

SPA

relays

are

provided

Figures

and

respectively

When

direct

transfer

tripping

over

the

pilot

wire

desired

addition

the

monitoring

functions

the

SPA

required

the

sending

end

and

the

SPA

the

receiving

end

These

relays

include

the

necessary

circuits

transmit

and

receive

the

direct

transfer

trip

signals

well

the

functions

required

monitor

the

pilot

wire

circuit

previously

described

Typical

elementary

diagrams

for

pilot

wire

relaying

system

with

monitoring

and

transferred

tripping

are

provided

Figure

for

two

terminal

lines

and

Figure

for

three

terminal

line

applications

These

diagrams

illustrate

the

two

way

transfer

trip

application

which

the

transfer

trip

signal

initiated

either

the

sending

end

relay

(

SPA

)

the

receiving

end

relay

(

SPA

)

When

the

transfer

trip

signal

sent

one

direction

only

the

same

relays

are

applied

but

the

unit

would

not

used

the

transfer

trip

initiating

end

and

the

TTA

unit

would

not

Diagrams

for

tne

one

way

transfer

trip

application

used

the

transfer

trip

receiving

end

are

available

upon

request

OPTIONS

AND

FEATURES

There

are

four

types

SPA

relays

)

sending

end

relay

)

sending

end

relay

with

transfer

trip

capability

)

receiving

end

relay

and

)

receiving

end

relay

with

transfer

trip

capability

sending

end

relay

with

the

transfer

trip

feature

may

used

with

receiving

end

relay

without

the

transfer

trip

feature

and

vice

versa

The

basic

functions

the

four

types

SPA

relays

are

outlined

the

table

below

TABLE

FUNCTIONS

THE

SPA

RELAYS

SENDING

RECEIVING

TRANSFER

TRIP

CAPABILITY

UNDERCURRENT

DETECTION

OVERCURRENT

GROUND

DETECTION

RELAY

END

SPA

XXX

Courtesy of NationalSwitchgear.com

GEK

65512

open

pilot

wire

will

result

undercurrent

detection

;

shorted

pilot

wire

will

result

overcurrent

detection

and

ground

either

conductor

the

pilot

wire

will

result

ground

detection

RATINGS

TEMPERATURE

These

relays

have

been

designed

for

continuous

operation

ambient

temperatures

between

and

per

ANSI

Standard

37.90

1978

Over

this

range

the

detection

levels

will

vary

not

than

three

percent

(

)

from

their

nominal

values

addition

these

relays

will

not

malfunction

nor

damaged

operated

ambient

DIELECTRIC

STRENGTH

(

HIGH

POTENTIAL

TEST

)

For

the

purposes

dielectric

tests

the

SPA

relays

are

rated

600

volts

Per

ANSI

IEEE

37.90

1978

the

high

potential

test

voltage

2200

volts

for

one

minute

described

the

standard

relays

other

than

new

should

tested

this

voltage

CONTACTS

The

telephone

relay

output

contacts

the

SPA

will

make

and

carry

amperes

for

tripping

duty

and

will

make

and

carry

amperes

continuously

The

interrupting

ratings

are

given

Table

TABLE

INTERRUPTING

CURRENT

RATINGS

TELEPHONE

TYPE

RELAY

CONTACTS

AMPS

VOLTS

INDUCTIVE

NON

INDUCTIVE

115

0.75

2.0

230

0.5

1.5

VOLTS

1.0

3.0

125

0.5

1.5

250

0.25

1.0

The

inductive

rating

based

ratio

0.1

second

Courtesy of NationalSwitchgear.com

GEK

65512

TARGET

SEAL

UNIT

The

target

seal

unit

connected

studs

and

the

SPA

and

SPA

relays

has

the

ratings

and

characteristics

shown

Table

III

TABLE

III

RATINGS

AND

CHARACTERISTICS

THE

TARGET

SEAL

UNIT

TAP

0.2

2.0

Resistance

(

Ohms

)

Minimum

Operating

(

Amperes

)

Carry

Continuously

(

Amperes

)

Carry

Amps

for

(

Seconds

)

Carry

Amps

for

(

Seconds

)

Impedance

(

Ohms

)

Minimum

Dropout

(

Amperes

)

0.13

0.2

2.0

0.3

0.03

0.25

0.53

0.05

0.5

SEISMIC

CAPABILITY

The

Seismic

Fragility

Level

exceeds

3.5

ZPA

when

tested

using

biaxial

multi

frequency

input

motion

produce

Required

Response

Spectrum

accordance

with

ANSI

IEEE

37.98

1978

Standard

for

SeismicTesting

Relays

CHARACTERISTICS

OPERATING

PRINCIPLES

The

Type

SPA

relays

are

designed

detect

open

pilot

wire

shorted

pilot

wire

and

grounded

pilot

wire

protective

system

using

pilot

wire

relays

Type

SPD

pilot

wire

relays

are

covered

instruction

book

GEK

49794

The

Type

SPA

relays

operate

circulating

small

direct

current

approximately

0.75

milliamperes

through

the

pilot

wire

The

current

provided

the

power

supply

the

sending

end

monitoring

relay

(

SPA

)

The

receiving

end

monitoring

relay

(

)(

SPA

)

completes

the

circuit

loop

for

the

circulating

current

without

adding

subtracting

(

sourcing

sinking

)

any

current

OPEN

PILOT

WIRES

The

undercurrent

units

the

SPA

relays

are

energized

(

picked

)

under

normal

operating

conditions

When

open

circuit

the

pilot

wire

occurs

the

current

drops

zero

and

the

undercurrent

units

both

receiving

and

sending

end

relays

drop

out

and

the

LED

indicators

light

This

the

extreme

case

the

undercurrent

condition

The

undercurrent

units

will

drop

out

forthe

circulating

currents

indicated

below

Courtesy of NationalSwitchgear.com

GEK

65512

TABLE

UNDERCURRENT

DETECTION

LEVELS

RELAY

ARRANGEMENT

UNDERCURRENT

DETECTION

Sending

End

Receiving

End

Sending

End

Receiving

End

Terminal

0.53

less

0.43

less

0.53

less

0.21

less

SHORTED

PILOT

WIRES

The

overcurrent

units

the

SPA

relays

are

normally

energized

(

dropped

out

)

When

short

circuit

the

pilot

wire

occurs

the

current

increases

significantly

causing

the

overcurrent

unit

the

sending

end

relay

pick

and

causing

the

LED

indicator

light

All

the

current

circulates

through

the

short

circuit

thereby

reducing

the

current

the

receiving

end

(

)

zero

This

detected

the

undercurrent

unit

the

receiving

end

relay

(

)

short

circuit

the

extreme

case

the

overcurrent

condition

The

overcurrent

unit

the

sending

end

relay

will

pick

for

circulating

currents

1.35

milliamperes

greater

GROUNDED

PILOT

WIRES

When

the

resistance

ground

either

conductor

the

pilot

wire

falls

below

000

ohms

the

ground

unit

the

sending

end

relay

(

normally

dropped

out

)

will

pick

and

the

GND

indicator

LED

will

light

REVERSED

PILOT

WIRES

the

event

that

the

conductors

the

pilot

wire

are

accidentally

reversed

the

circulating

current

shunted

through

low

resistance

path

the

receiving

end

relay

This

results

overcurrent

detection

the

sending

end

relay

and

undercurrent

detection

the

receiving

end

relay

This

condition

the

same

the

case

shorted

pilot

wires

OPERATING

TIMES

The

operating

times

the

undercurrent

overcurrent

and

ground

detection

circuits

were

intentionally

made

slow

order

override

transient

disturbances

The

operating

times

vary

depending

upon

conditions

the

primary

system

application

arrangements

(

two

terminals

versus

three

terminals

)

and

the

extent

the

abnormal

condition

the

pilot

wire

The

values

Table

are

approximate

They

are

intended

give

general

idea

the

time

involved

Courtesy of NationalSwitchgear.com

GEK

65512

TABLE

APPROXIMATE

OPERATING

TIMES

UNIT

PILOT

WIRE

CONDITION

DETECTION

TIME

RESTORE

TIME

Open

Circuit

Short

Circuit

Grounded

Conductor

BOO

msec

300

msec

300

500

msec

2000

msec

700

2000

msec

400

800

msec

GND

Detection

time

each

function

the

time

its

contact

upon

the

occurrence

the

condition

listed

the

table

Restore

time

for

each

function

the

time

reopen

its

contact

when

the

condition

listed

the

table

removed

and

normal

circuit

conditions

are

restored

TRANSFER

TRIP

The

SPA

and

SPA

relays

can

send

transfer

trip

signal

over

the

pilot

wire

initiate

tripping

the

other

terminal

(

)

The

signal

can

sent

from

either

the

sending

end

relay

(

SPA

)

orthe

receiving

end

relay

(

SPA

)

will

initiate

the

tripping

both

the

local

and

remote

breakers

two

terminal

line

all

three

breakers

three

terminal

line

The

transfer

trip

signal

produced

energizing

the

coil

the

TTA

unit

through

external

contact

When

the

TTA

picks

reverses

the

polarity

the

voltage

applied

the

pilot

wire

through

studs

and

The

reversed

polarity

voltage

the

pilot

wire

causes

the

operation

the

transfer

trip

(

)

unit

the

local

and

remote

SPA

relays

The

output

contact

connected

between

studs

and

provided

with

target

seal

unit

and

recommended

for

tripping

duty

The

contact

between

studs

and

auxiliary

contact

and

has

target

seal

unit

The

operating

time

between

energizing

TTA

one

end

the

pilot

wire

and

picking

the

other

end

(

remote

)

varies

slightly

with

the

length

the

pilot

wire

indicated

below

The

time

pick

the

local

unit

approximately

two

(

)

cycles

independent

the

length

the

pilot

wire

Remote

Pickup

Time

Remote

Dropout

Time

(

Hertz

Basis

)

(

Hertz

Basis

)

Short

Pilot

Wire

(

Series

ohm

)

Long

Pilot

Wire

(

Series

2000

ohms

)

approximately

cycles

approximately

cycles

approximately

cycles

approximately

cycles

Courtesy of NationalSwitchgear.com

GEK

65512

the

pilot

wire

used

only

for

the

transfer

trip

function

and

pilot

wire

differential

relays

are

connected

the

pilot

wire

the

operating

time

will

follows

Remote

Pickup

Time

(

Hertz

Basis

)

approximately

cycles

approximately

cycles

Short

Pilot

Wire

Long

Pilot

Wire

The

transfer

trip

operating

time

virtually

independent

station

battery

voltage

for

two

reasons

)

the

units

are

energized

from

the

regulated

volt

power

supply

the

relay

;

and

)

the

operating

time

theTTA

units

varies

only

slightly

with

battery

voltage

shown

Fig

LOW

PASS

FILTER

The

current

circulating

through

the

pilot

wire

monitored

through

low

pass

filter

each

the

SPA

relays

The

filter

serves

two

purposes

)

screens

out

the

signals

transmitted

over

the

pilot

wire

the

SPD

relays

;

and

)

screens

out

any

disturbances

noise

the

pilot

wire

Relay

models

are

available

for

use

hertz

systems

and

hertz

systems

The

filters

are

slightly

different

ensure

adequate

attenuation

the

system

frequency

BURDENS

The

table

below

indicates

the

burdens

the

SPA

relays

the

station

supply

under

normal

operating

conditions

TABLE

BURDENS

WITH

TTA

ENERGIZED

110

125

110

125

SPA

150

Values

may

vary

SETTINGS

The

SPA

relays

were

designed

and

are

factory

tested

such

that

calibration

the

user

unnecessary

There

are

adjustments

made

The

power

supplies

within

the

relay

must

set

the

user

correspond

with

the

input

voltage

This

entails

the

positioning

two

adjacent

selectors

the

printed

circuit

board

that

contains

the

power

supply

The

positions

are

clearly

labeled

the

printed

circuit

board

The

relays

that

include

the

transfer

trip

feature

(

SPA

and

)

contain

additional

voltage

link

set

located

above

the

target

seal

unit

the

mounting

plate

Courtesy of NationalSwitchgear.com

GEK

65512

The

receiving

end

relays

(

SPA

and

SPA

)

must

set

for

two

terminal

application

three

terminal

application

This

entails

the

positioning

selector

the

printed

circuit

board

The

target

seal

unit

tap

setting

should

satisfy

the

following

two

requirements

)

the

minimum

trip

circuit

current

should

enough

operate

the

target

seal

(

least

150

tap

recommended

)

;

and

)

the

target

seal

unit

resistance

the

tap

chosen

must

low

enough

that

the

required

trip

current

will

flow

CONSTRUCTION

The

Type

SPA

relays

are

assembled

the

small

size

double

ended

(

)

drawout

case

having

studs

both

top

and

bottom

ends

the

rear

for

external

connections

The

electrical

connections

between

the

relay

and

case

studs

are

through

stationary

molded

inner

and

outer

blocks

between

which

nests

removable

connection

plug

The

outer

blocks

attached

the

case

have

the

studs

for

the

external

connections

and

the

inner

blocks

have

the

terminals

for

the

internal

connections

The

four

types

SPA

relays

have

the

same

nameplate

which

shown

Figure

There

are

two

cutouts

for

the

LED

indicators

and

the

selector

pins

One

set

selector

pins

sets

the

voltage

rating

and

the

other

selector

sets

the

relay

for

two

three

terminal

line

applications

The

labels

between

the

cutouts

are

identical

for

all

four

types

SPA

relays

The

sending

end

relays

(

SPA

and

)

have

selector

set

the

relay

for

two

three

terminal

applications

and

the

receiving

end

relays

(

SPA

and

)

have

and

GND

indicator

LEDs

Every

circuit

the

drawout

case

has

auxiliary

brush

shown

Figure

provide

adequate

overlap

when

the

connecting

plug

withdrawn

inserted

Some

circuits

are

equipped

with

shorting

bars

(

see

internal

connections

Figures

and

)

The

relay

mechanism

mounted

steel

framework

called

the

cradle

and

complete

unit

with

all

leads

terminated

the

inner

blocks

This

cradle

held

firmly

the

case

with

latch

both

top

and

bottom

The

connection

plug

besides

making

the

electrical

connections

between

the

respective

blocks

the

cradle

and

case

also

locks

the

latch

place

The

cover

which

drawn

the

case

thumbscrews

holds

the

connection

plugs

place

the

relays

that

include

the

transfer

trip

feature

(

SPA

and

SPA

)

the

target

reset

mechanism

part

the

cover

assembly

The

relay

case

suitable

for

either

semiflush

surface

mounting

all

panels

two

inches

thick

and

appropriate

hardware

available

The

relay

shipped

with

hardware

suitable

for

mountinq

inch

steel

panels

Panel

thickness

other

than

inch

must

indicated

the

relay

order

ensure

that

proper

hardware

will

included

Outline

and

panel

drilling

shown

Figure

separate

testing

plug

can

inserted

place

the

connection

plug

test

the

relay

place

the

panel

either

from

its

own

source

current

and

voltage

from

other

sources

;

the

relay

can

drawn

out

and

replaced

another

that

has

been

tested

the

laboratory

Courtesy of NationalSwitchgear.com

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