Ge Cal16a User manual

INSTRUCTIONS

GEI-31090A

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NETWORK

RELAYS

Types

CAL16A

CAN13A

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A POWER SYSTEMS

MANAGEMENT

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NETWORK

RELAY

TYPES

CAL16A

AND

CAN13A

INTRODUCTION

With a few

el;',

eptions, the Type CAL16A and

CAN13A

relays

are

Identical

In

conslruction and

function to the

standard

secondary

network

relays

shown

In

the Included

Instruction

book GEI-13580.

The

CAN13A wlll

prevent

reclosure

if

the

source

phase

sequence

Is

reversed

and

the network

phase

sequence

Is

normal.

The

principal

difference

af-

fecting

both

relays

Is

that

Ihe

glass

cover

and

mountlng

bracket

have been

removed,

and the

relays

have been mounted

In

the

drawout

case

for mounllng

on a panel. Also, both

relays

have 2

ampere

holding

coils

In

the

reclose

circuits,

Instead

of

the 0.3

ampere

coils

as

In

the

standard

relay.

The

Type CAN13A

relay

differs

from the Type

CANllA

relay

In

several

points

concerning physical

construction

and

electrical

connections. The only

change

in function

is

that

It

Is designed to

trip

at

approximately

0.005

ampere,

current

transformer

secondary

current,

In

phase

with

line-to-neutral

voltage. It

is

intended to be

used

for tripping when

the only

reverse

power flowing Is the magnetizing

current

of the

associated

power

Iransformer.

The

principal

diHerences

between the Type

CAN13A

relay

and the Type CANIlA relay

are

as

follows:

1. The

reclose

contact

Is on the left and the Irlp

contact

on the

right,

facing the

relay,

On

the

Type

CAN

13A

relay.

This Is the

reverse

of the

Type

CANllA

relay.

2.

The

rna

In

control

spring

Is

used

to

adjust

trip

value

and

the mechanical

restraint

Is

used

to

adjust

r~close

value on the Type CAN13A

relay.

3.

The

electrical

restraint

element

has

been

omitted

on the

Type

CANI1A

relay.

4.

The

potential

coils,

Instead of

being

connected

directly

to the network

side

of the

breaker

are,

connected

to a

reststor

combination

across

each

pole

of the

associated

breaker.

This

last

feature

allows the

potential

coils

to

be

energized

from

the network

side

when the

source

side

Is

de-energized;

or

from the

source

side

when

the network

side

is

de-energized.

When the

breaker

is

closed,

the two

sections

of the

resistor

com-

bination on each

phase

are

effectively

In

parallel

and the net

resistance

is

the

same

as

that

ordinarily

used with the Type CANIIA

relay

(I.e.,

340 ohms

when 6054912

GS

Is

used

as

the

phase-shiftlng

trans-

for

mer,

and

when the 900 ohm

resistor

Is

used

in

the

phase

circuit

for 1.5 volt

reclosure.)

Therefore

the

tripping

characteristic

is

the

same

except

that

the

setting

is

0.1%

insteadofO.2%ofthe

relay

rating.

RECEIVING,

HANDLING

AND

STORAGE

The

relays,

when not Included

as

a

part

of

a

control

panel,

will be shipped in

cartons

designed

to

protect

them

against

damage.

Immediately

upon

receipt

of a

relay

examine

It

for any damages

sus-

taIned in

transit.

11

injury

or

damage from rough

handling

is

evident, file a

damage

claim

at

once

with the

transportation

company and promptly notify

the

nearest

General

Electric

Apparatus

Sales OHice.

Reasonable

care

should be

exercised

in

unpack-

Ing

the

relay

in

order

thai none of the

parts

are

Injured

or

the

adjustments

dlstrubed.

If

the

relays

are

not to be Installed

immediately,

they should

be

stored

in

their

original

cartons

in

a

place

that

Is

free

from

moisture,

dust

and

metallic

chips.

Foreign

matter

collected

on

the

outside

of

the

case

may lind

its

way Inside when the

cover

is

removed and

cause

trouble

in

the

operation

of the

relay.

DESCRIPTION

RELAY

CASE

The

case

is

suitable

for

either

surface

or

semi-flush

panel

mounting

and

an

assortment

of

hardware

is

provided

for

either

mounting. The

cover

attaches

to the

case

and

also

carries

the

reset

mechanism

when one

is

required.

Each

cover

screw

has

provision

for a sealing

wire.

The

case

both ends

or

connections.

has

studs

or

screw

connectlons

at

the bottom only

for

the

external

The

electrical

connectlons between

Th<ese

instructions

do

not

purport

to

cover

all

details

or

variations

in

eqUipment

llor

to

provide

for

every

possible

ccntingency

to

be

met

in

connection

with

installation,

operation

or

maintenance.

Should

further

infonrldtion

be

desired

or

should

p,uticuldr

problems

arise

",hich

.Ice

not

covered

sufficiently

foc

the

purchaser's

purposes,

the

mdttec

should

be

referred

to

the

General

~lectrjc

Company.

To

the

extent

required

the

prcxlucts

described

herein

meet

applicdble

ANSI,

IEEE

and

NEliA

stdnddIdsl

but

no

such

assurance

is

given

with

respect

to

local

codes

4nd

ordinances

because

they

vary

greatly.

3

GEl-31000 Network Relays Types CALl6A and CANUA

the

relay

untlll and the

case

studs

are

made through

sprtng

backed contact

fingers

mounted

In

stationary

molded Inner and outer blocks between which neslll

a

removable

connecting plug which completes the

circuits.

The outer blocks, attached to

th~

case,

have the

studs

for the

external

connecttons, and the

Inner blocks have the

terminals

for the Internal

connections.

The

relay

mechanism Is mounted

In

a

steel

framework

called

the

cradle

and Is a complete unit

with

all

leads

being

terminated

at

the Inner block.

This

cradle

Is held

firmly

In

the

case

with a latch

at

the top and the bottom and

by

a guide pin at the

back of the

case.

The

cases

and

cradles

are

so

constructed

that the

relay

cannot be Inserted

In

the

case

upside down. The connecting plug,

besides

making the

electrical

connections between the

re-

epecllve blocks

of

the

cradle

and

case,

also

locka the

latch

In

place. The coverl which Is

lstened

to the

caRe

by

thumbscrews,

hol<1ll

the connecting plug In

place.

To

draw out the relay unit the

cover

Is

lIrst

removed, and the plug drawn out. Shorting

bars

are

provided

In

the

case

to

short

the our

rent

transfor-

mer

circuits.

The latches

are

then

released,

and

the relay unit can

be

easlly drawn out.

To

replace

the relay unit, the

reverse

order

Is followed.

A

separate

tesllng

plug can be

Inserted

In

place

of the connecting plug to

test

the

relay

In

place on

the panel

either

from

Its own

source

of

current

and

voltage,

or

from

other

sources.

Or, the

retay

unit

can be drawn out and reptaced

by

another which

has

been tested

In

the

laboratory.

INSTALLATION

LOCATION AND MOUNTING

The locallon should be

clean

and dry,

free

from

dust and

excessive

Vibration, and well lighted to

lacllItate

Inspection and

testing.

The

relay

should

be

mounted

on

a

vertical

sur-

lace.

The outline and

panel

drUllng dImensions lor

the Type CAL16A

retay,

In the

size

Ml

case,

Is

shown

In

Fig.

6.

The outline and panel drilling

•

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HOLDING

CO

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FINGERS

3

p~

rI

7

a

dimensions lor the Type

CAN13A

relay,

In

the

size

M2

case,

Is shown

In

Fig.

7.

CONNECTIONS

The Internal connections lor the Type CAL16A

and

CAN13A

relays

are

shawn

In

Figs.

1 and 2

respectively.

A typical

external

connection

diagram

lor

the

Types CAL16A andCAN13A

relays

Is shown

In

Fig. 3.

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Internal

Connections

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Type

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For

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Type

CAll6A

MAINTENANCE

TYPE

CAN13A

RELAYS

INSPECTION

AND

MECHANICAL

ADJUSTMENT

1.

The maln

control

spring

of

lhe Type

CAN13A

relay

Is

adjusted

so

lhat lhe

trip

contacts

are

open with

zero

windup on lhe

control

spring

adjusting

shalt,

and

are

JUBt

made

when

lhere

are

3 halI-turnB windup (counterclockwIBe)

on

lhe

adjuBting

shaft.

The

normal

pOBition of lhe

spring

Is

such

lhat lhe

right-hand

(trip)

contacts

just

make with lhe

relay

de-energized.

This

can be checked

by

deflecting lhe

right-hand

Btatlonary

contact

to lhe right and noting lhat lhe

moving

contacts

do

not move to the

right.

2.

Items

1 to 9 w1der INSPECTION

AND

MECH-

ANICAL ADJUSTMENT

In

GEI-13580 apply to

lhe Type CAN13A relay. Item

10

under

the

same

heading,

covering

the

electrical

reBtralnt

ele-

ment, doeB not apply.

CALIDRATlON TESTS

AND

ADJUSTMENTS

Fig. 4 shows the

test

cOI;"ectlonB

for

checking

and

adjusting

both the

trlppl""

and

recloslng

cali-

bration.

The

trip

seltlng should

be

checked

first

because

any

adjustment

of lhe

trip

seUlng

also

affecls

the

reclose

setting; whereaB, lhe

reclose

Betting

can

be

adjusted

Independently of lhe

trip

Betting

and should

lherefore

be made

last.

Trlp.E!!!i.

Connect the

relay

as

Bhown

In

Fig. 4. Wllh the

relay

de-energized,

lhe

right-hand

contact

Bhould

be

just

made. Wllh only lhe

potenttal

co\ls

ener-

gized, lhe moving

contacts

Bhould

pull

away from lhe

trip contact.

ClOBlng

lhe

switch

In

lhe

current

cir-

cuit to

pass

current

lhrough lhe H wlndlng, wllh the

connections

Bhown,

Bhould

produce

a torque

In

lht

direction to cloBe lhe

trip

contact.

Wllh lhe tes.

connections

Bhown,

a

single-phase

current

Is us

•.

and the

required

slngle-phaBe

current

IB

equal to

1.5

times

lhe

desired

lhree-phase

trip

Betting. For

example,

If

it

Is

deBlred

to

trip

at

0.005

amperes

balanced

lhree-phase

current,

lhe

ammeter

Ashould

read

0.0075

amperes

because

of lhe Single-phase

cur

rent.

The

trip

calibration

can

be

adjusted

above

or

below lhe faclory

setting,

or

the

factory

setting

can

be

restored,

by

adjusting

lhe main

control

spring

adjusting Bhaft

(see

photographB of

CAN

retay,

Fig.

19

In

GEI-13580).

Turning

this

shaft

clockwise

Increases

lhe amount of

reverse

current

required

for tripping, and

turning

the

shalt

counterclockwise

decreases

the amount of

reverse

current

required.

Reclosl~

To check the voltage

necessary

for

reC\osing

connect

as

shown

In

the

lower

diagram

of Fig.

4.

The one ohm

reslslor

In

parallel

wllh lhe phasing

(Y)

winding of lhe

phase

shlftlng

transformers

has

such a low Impedance

compared

to the phasing

windings

lhat

practlcally

all

of lhe

current

read

by

ammeter

A

passes

lhrough

the

resistor,

and lhe

ammeter

reading Is

equal

to the voltage

across

lhe

resistor.

Since

lhls

Is a

"single-phase"

test,

lhe

voltage applied

must

be

1.5

times

lhe

desired

lhree-

phase

reclose

setting.

For

example,

for a

lhree-

phase

1.5

volt

reclose

setting,

lhe

ammeter

A should

read

2.25

amperes.

7

8

GEI-3J090 Network

Relays

Types

CAL16A and CAN13A

The

reclose

calibration

of the

relay

can

be

changed by adjusting the

mechanical

restraInt

ele-

ment. TurnIng the

cap

of the

restraInt

clockwIse

Increases

the

restraint

and

therefore

the

reclose

callbratton.

Holding

Colis

Both holdIng-colis of the Type

CAN13A

relay

are

rated

2

amperes.

These

holdIng

colis

can

b£'

checked

as

part

of the

trIp

and

reclose

adjustments

above by connecttng an

adjustable

resIstor

In

the

contact

cIrcuit

and adJusttng the holdIng coli

clrcult

to 2

amperes.

As soon

as

the

trlp

or

reclose

con-

tacts

make, the

sealing

armature

should deClnitely

seal

them closed, and

there

should be no

sparking

except

at

the Instant the

contacts

touch.

Interrupt

the holdIng

current

by an

external

switch

In the

contact

cIrcuit,

never

at

the

conlaets.

TYPE

CAUSA

RELAY

The Type CAL16A

relay

Is Identtcal

to

the Type

CAL15A

relay,

deserlbe~

In

the Included

Instruc-

tton book GEI-13580, except that

It

Is mounted

In

a

drawout

case.

For

callbratton,

the

relay

should be

connected

as

shown

In

Fig.

5.

The

normal

call-

bratton

of

the

Ty"e

CAL16A

relay

Is to

close

Its

contacts when the

phasIng

voltage (on

studs

7-8)

ts

gradual\¥

Increased

to 0.5 volt, leading the

potential

voltage

(studs

5-6) by 90

degrees.

Adjustments

can

be made

as

described

In

GEI-J3580.

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Relays

Types CALl6A and CAN13A GEI-31090

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7 Out)lne

And

Panel Dri)l

ing

Dimension.

for

Relay

Type

CAMI3A

GE CAL16A User manual

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