Abb Tmc User manual

Ann

APV

IB

7.1

.

1.7

-

10

Issue

A

INSTRUCTIONS

Ground

Fault

Monitor

TYPE

TMC

Monitor

without

Sensor

Test

Feature

TYPE

TMS

Monitor

with

Sensor

Test

Feature

For

Use

with

Type

GRC

Ground

Relay

GRP

,

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POWER

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COMPANY

INC

.

ALLENTOWN

,

PENNSYLVANIA

,

USA

Courtesy of NationalSwitchgear.com

16

7

.

M

.

7

-

10

PAGE

2

GROUND

FAULT

MONITOR

TABLE

OF

CONTENTS

Page

2

Page

2

Page

3

Page

k

Page

6

Page

11

Int

roduction

Precautions

Placing

Monitor

into

Service

Application

Data

Operation

Testing

INTRODUCTION

These

instructions

contain

the

information

required

to

properly

install

,

operate

,

and

test

the

Ground

-

Shield

ground

fault

test

and

monitor

panel

,

Types

TMC

and

TMS

semi

-

flush

and

surface

mounted

.

The

TMC

and

TMS

monitors

are

optional

accessories

for

use

with

the

Type

GRC

surface

case

ground

fault

relays

to

provide

operation

indicators

and

testing

features

.

Standard

features

include

:

Flush

mounting

case

.

Memory

type

operation

target

.

Lamp

,

to

indicate

availability

of

control

power

.

Relay

testing

with

or

without

tripping

of

disconnect

means

.

Sensor

testing

with

or

without

tripping

of

disconnect

means

(

Type

TMS

only

)

.

a

.

b

.

c

.

d

.

e

.

Optional

features

:

Auxiliary

contact

output

for

tripping

or

alarm

,

or

to

prevent

reclosing

of

circuit

b

reakers

.

a

.

See

Instruction

Book

IB

7.1

.

1.7

-

5

for

information

covering

the

Type

GRC

ground

relay

and

Type

GS

ground

sensors

.

The

Type

TMS

monitor

can

be

used

only

with

those

ground

sensors

that

include

a

test

winding

(

Terminal

nTn

)

.

Earlier

versions

of

the

TMC

Monitor

,

catalog

number

202

T

3010

and

202

T

321

^

(

120

VAC

/

125

VDC

dual

-

rating

)

have

slightly

different

connections

than

the

units

shown

in

this

instruction

book

.

See

"

MAINTENANCE

"

on

Page

11

or

refer

to

IB

7

*

1

*

1.7

-

&

.

See

Instruction

Book

IB

7

*

1.1

.

7

-

9

for

recommendations

for

Field

Testing

of

Ground

Fault

Systems

.

PRECAUTIONS

The

following

precautions

should

be

taken

when

applying

this

equipment

:

Incorrect

wiring

may

result

in

damage

,

gram

for

the

particular

unit

before

the

unit

is

energized

.

Be

sure

wiring

agrees

with

the

connection

dia

-

1

.

If

a

control

wiring

Do

not

apply

high

voltage

tests

to

solid

-

state

relays

or

monitors

,

insulation

test

is

required

,

bond

all

terminals

together

before

applying

test

voltage

.

2

.

I

f

a

monitor

Follow

test

instructions

to

verify

that

unit

is

in

proper

working

order

,

is

found

to

be

defective

,

we

suggest

that

it

be

returned

to

the

factory

for

repair

.

Immediate

replacement

can

be

made

available

from

the

factory

;

identify

by

catalog

num

-

We

suggest

that

a

complete

spare

unit

be

ordered

as

a

replacement

,

and

the

inop

-

erative

unit

be

repaired

and

retained

as

a

spare

.

entails

working

with

energized

equipment

,

caution

should

be

taken

to

avoid

personal

shock

.

3

*

ber

.

CAUTION

:

Since

t

roub

1

eshooting

Only

competent

technicians

familiar

with

good

safety

practices

should

service

these

devices

.

4

.

Do

not

hold

the

TEST

SWITCH

in

the

test

position

for

more

than

2

seconds

.

Courtesy of NationalSwitchgear.com

IB

7.1

.

1.7

-

10

PAGE

3

GROUND

FAULT

MONITOR

PLACING

THE

MONITOR

INTO

SERVICE

RECEIVING

,

HANDLING

,

STORAGE

1

.

Upon

receipt

of

the

unit

(

when

not

included

as

part

of

a

switchboard

)

examine

for

ship

-

ping

damage

.

nearest

BBC

Brown

Boveri

Inc

.

Sales

Office

,

damage

.

Keep

reasonably

clean

and

dry

.

the

operation

indicator

(

target

)

display

showing

orange

.

If

damage

or

loss

is

evident

,

file

a

claim

at

once

and

promptly

notify

the

Use

normal

care

in

handling

to

avoid

mechanical

The

ground

fault

monitor

is

normally

shipped

with

2

.

INSTALLATION

Mounting

The

panel

drilling

and

cutout

information

is

given

in

Figure

1

.

A

rectangular

panel

cutout

and

(

A

)

mounting

holes

are

required

.

The

outline

of

the

Type

TMC

is

shown

in

Figure

2

A

,

and

the

Type

TMS

is

shown

in

Figure

2

B

.

The

monitor

is

completely

enclosed

.

The

upper

part

of

the

front

plate

provides

space

for

user

’

s

identification

markings

of

associated

circuits

or

disconnect

means

.

If

stencil

-

ling

is

desired

,

remove

the

switch

guards

and

(

4

)

screws

(

3

inches

apart

)

to

detach

the

front

plate

.

Connections

Use

only

copper

wire

when

making

connections

.

Special

care

must

be

taken

to

connect

control

power

of

proper

voltage

and

polarity

.

See

monitor

nameplate

for

voltage

rating

.

Typical

external

connection

diagrams

of

TMC

and

TMS

monitors

and

GRC

relays

are

shown

in

Figures

3

"

6

.

AM

monitor

leads

connected

to

the

ground

fault

relay

should

be

routed

to

-

gether

.

See

Application

Data

section

for

control

and

test

power

requirements

.

Remove

the

jumper

between

relay

terminals

4

and

5

of

the

GRC

relay

when

the

is

wired

in

.

monitor

NOTE

:

IF

THE

MONITOR

IS

DISCONNECTED

OR

REMOVED

FROM

THE

CIRCUIT

FOR

ANY

REASON

,

YOU

MUST

REINSTALL

A

JUMPER

BETWEEN

TERMINALS

4

AND

5

ON

THE

GRC

RELAY

(

JUMPER

COMPLETES

TRIPPING

CIRCUIT

)

.

3

.

CONTROLS

AND

INDICATORS

The

Type

TMC

or

TMS

monitor

does

not

contain

adjustments

which

require

field

settings

.

The

following

controls

and

indicators

are

provided

:

Indicates

presence

of

control

power

.

CONTROL

POWER

LIGHT

NO

-

TRIP

SWITCH

-

Holding

the

spring

-

return

toggle

in

the

up

position

temporarily

disconnects

the

trip

coil

(

and

auxiliary

output

relay

if

provided

)

.

TEST

SWITCH

-

For

Type

TMC

,

tests

relay

with

or

without

tripping

of

circuit

breaker

.

Type

TMS

,

tests

sensor

and

relay

with

or

without

tripping

circuit

breaker

.

For

GROUND

FAULT

TARGET

-

Orange

target

indicates

relay

operation

under

ground

fault

or

test

conditions

.

Indication

is

retained

even

if

control

power

is

lost

after

operation

.

RESET

PUSHBUTTON

-

Resets

target

to

black

(

and

resets

auxiliary

output

relay

if

provided

)

.

4

.

INITIAL

CHECK

After

wiring

is

completed

and

checked

,

apply

control

power

and

note

if

lamp

is

lit

.

Then

attempt

to

reset

the

operation

indicator

.

If

the

indicator

cannot

be

reset

,

recheck

connections

,

voltage

and

polarity

.

Do

not

attempt

any

other

tests

until

wiring

errors

are

corrected

.

Courtesy of NationalSwitchgear.com

IB

7.1

.

1

-

7

-

10

PAGE

A

GROUND

FAULT

MONITOR

APPLICATION

DATA

The

Types

TMC

or

TMS

Test

and

Monitor

Panel

is

an

optional

,

flush

mounted

unit

for

use

with

the

standard

GRC

Ground

Fault

Relay

System

.

Standard

Features

include

:

1

)

A

CONTROL

POWER

LAMP

to

indicate

the

presence

of

control

power

to

the

relay

system

.

2

)

A

ground

fault

OPERATION

IN

-

DICATOR

which

maintains

indication

even

on

loss

of

control

power

.

3

)

A

TEST

SWITCH

for

perform

-

ing

an

operational

test

on

the

GRC

ground

relay

,

A

)

A

NO

-

TRIP

switch

to

prevent

the

disconnect

from

tripping

when

the

operational

test

is

performed

,

if

continuity

of

service

must

be

maintained

.

5

)

A

RESET

pushbutton

to

reset

the

target

from

orange

to

black

.

An

auxiliary

output

relay

can

be

provided

as

an

option

for

remote

alarm

or

other

purposes

.

Its

contacts

are

reset

after

a

relay

operation

by

the

RESET

pushbutton

.

TYPE

TMC

MONITOR

This

monitor

allows

testing

of

the

GRC

relay

and

the

disconnect

device

operation

.

If

the

sensor

includes

the

MT

"

Any

of

terminal

,

the

Type

GS

Ground

Sensors

may

be

used

in

this

system

,

it

must

be

jumpered

to

the

SI

terminal

.

TYPE

TMS

MONITOR

The

Type

TMS

monitor

is

provided

with

test

circuits

and

current

limiting

resistors

to

inject

a

test

current

into

the

sensor

test

winding

(

3

“

5

amperes

maximum

)

.

Thus

the

test

power

transform

-

er

should

be

sized

accordingly

to

supply

the

test

current

at

120

VAC

for

1

-

2

seconds

.

A

minimum

rating

of

250

VA

is

recommended

.

Note

that

the

monitor

test

and

control

circuits

are

isolated

,

hence

could

be

connected

to

different

sources

.

However

,

the

monitor

terminal

2

should

be

connect

-

ed

to

the

ungrounded

end

of

the

120

VAC

test

source

,

and

terminal

S

2

of

the

sensor

must

be

wired

to

the

grounded

terminal

of

the

same

source

.

Also

,

the

optional

trip

or

alarm

contacts

are

iso

-

lated

and

could

be

connected

to

another

circuit

.

The

Type

TMS

monitor

is

designed

for

use

with

Type

GS

sensors

that

have

provisions

for

test

-

ing

(

terminal

T

)

.

The

test

circuit

requires

that

the

T

-

Sl

jumper

supplied

on

the

sensor

be

removed

.

See

the

GRC

relay

instruction

book

IB

7.1

.

1.7

”

5

for

a

list

of

available

sensors

.

CONTROL

SOURCE

CONNECTIONS

The

primary

of

a

control

transformer

,

if

provided

and

supplied

from

the

power

circuit

,

must

be

connected

line

to

line

.

When

control

power

is

taken

from

the

power

circuit

ahead

of

the

main

disconnecting

means

or

from

a

separate

source

,

the

control

circuit

conductors

should

have

overcurrent

protection

,

trol

circuit

overcurrent

protective

devices

should

have

an

interrupting

rating

adequate

for

the

short

-

circuit

current

available

,

should

be

kept

as

short

as

possible

.

Con

-

Conductors

ahead

of

the

control

circuit

overcurrent

protection

RATINGS

Major

ratings

appear

on

the

front

panel

or

labels

.

See

nameplate

for

nominal

control

voltage

.

Main

Control

Voltage

:

Available

control

voltage

models

:

120

VAC

125

VDC

A

8

VDC

2

A

/

32

VDC

Monitor

must

have

the

same

control

voltage

rating

as

the

associated

GRC

relay

.

Maximum

voltage

is

nominal

plus

10

%

.

Minimum

operating

control

voltage

:

55

%

of

nominal

for

AC

monitors

,

80

%

of

nominal

for

DC

monitors

.

Negligible

on

stand

-

by

;

15

-

50

ma

on

operation

of

auxiliary

relay

.

Control

Source

Drain

:

Output

Contacts

at

125

VDC

:

5

amps

RMS

continuous

1

amp

break

(

resistive

)

0.3

amp

break

(

inductive

)

30

amps

RMS

for

0.33

seconds

12.5

amps

RMS

for

0.25

seconds

7

-

5

amps

RMS

for

1

second

Courtesy of NationalSwitchgear.com

IB

7.1

.

1.7

-

10

PAGE

5

GROUND

FAULT

MONITOR

SENSOR

TEST

SOURCE

(

Type

TMS

Only

)

:

120

VAC

(

+

10

,

-

20

%

)

Sensor

Test

Drain

:

The

test

current

provided

by

the

TMS

Monitor

must

be

the

pick

-

up

current

range

of

the

GRC

Ground

Relay

used

in

the

application

.

Resistors

in

the

monitor

are

sized

to

provide

sufficient

current

to

operate

the

particular

GRC

Relay

for

all

pickup

settings

.

See

Table

1

for

a

listing

of

TMS

Monitors

.

Table

1

also

indicates

the

range

of

current

drain

to

be

expected

for

each

model

.

The

control

transformer

must

provide

this

current

.

The

actual

value

of

current

drawn

will

depend

on

the

particular

sensor

being

used

in

the

system

and

the

line

voltage

.

TABLE

1

:

SUMMARY

OF

COMMON

UNITS

Monitor

Catalog

Number

Sensor

Test

Drain

Auxi

1

iary

Contact

For

Use

Wi

th

GRC

Range

Monitor

Type

202

T

30

x

0

202

T

30

x

4

Ai

1

TMC

No

Yes

202

T

58

x

0

202

T

58

X

4

24

A

0

.

1

-

0.2

A

TMS

2

No

Yes

0.2

-

0.4

A

60

A

202

T

57

x

0

202

T

57

x

4

No

5

Yes

202

T

56

X

0

202

T

56

X

4

20

-

240

A

0.7

-

1

A

No

Yes

202

T

55

x

0

202

T

55

x

4

3

-

5

A

100

-

1200

A

No

Yes

The

"

x

"

in

the

above

catalog

numbers

MUST

be

replaced

with

the

proper

digit

in

-

These

are

:

IMPORTANT

:

dicating

the

main

control

voltage

value

to

completely

specify

the

unit

.

4

"

for

125

VDC

"

0

“

for

24

/

32

VDC

“

6

"

for

120

VAC

3

“

for

48

VDC

1 1

Test

current

drain

shown

exists

For

the

Type

TMS

,

the

sensor

test

voltage

source

is

always

120

VAC

.

only

during

operation

of

the

Sensor

Test

(

should

be

1

-

2

seconds

in

duration

)

.

4.00

*

3.625

^

0.1875

0.625

1.812

i

^

(

)

4

.

I

Fig

.

Is

Panel

Cutout

for

FLUSH

MOUNTED

MONITOR

(

dimensions

in

inches

)

2.50

<

r

-

x

4.875

5.00

.

w

2.50

e

-

U

v O

y

'

/

t

(

4

)

0.1563

or

0.188

mounting

holes

0.0625

Courtesy of NationalSwitchgear.com

IB

7.1

.

1.7

-

10

PAGE

6

GROUND

FAULT

MONITOR

OPERATION

The

CONTROL

POWER

light

should

normally

be

lit

,

indicating

the

availability

of

control

power

.

If

it

is

off

,

control

power

fuses

or

wiring

should

be

checked

.

If

the

control

power

transformer

is

on

the

load

side

of

the

circuit

protective

device

,

the

light

will

not

be

on

until

the

discon

-

nect

is

closed

.

Should

the

light

be

burned

out

it

is

easily

replaced

.

Upon

a

ground

fault

or

a

test

operation

,

the

FAULT

indicator

will

change

state

to

orange

,

and

the

optional

auxiliary

contact

(

if

provided

)

will

pick

up

and

seal

in

.

The

GRC

Ground

Fault

Relay

'

s

thyristor

(

SCR

)

output

is

restored

to

functional

status

upon

the

opening

of

the

circuit

protective

device

auxiliary

contact

(

52

a

)

and

does

not

require

manual

reset

.

The

FAULT

target

is

a

memory

type

and

will

retain

its

indication

even

if

the

control

power

transformer

is

on

the

load

side

of

the

disconnect

,

thus

resulting

in

loss

of

control

power

upon

operation

.

The

RESET

pushbutton

resets

the

target

and

the

auxiliary

contact

(

if

provided

)

.

Reclosing

on

a

fault

may

increase

arcing

damage

;

therefore

,

it

is

recommended

that

a

ground

fault

condition

be

located

and

corrected

before

the

disconnect

is

reclosed

.

The

types

TMC

and

TMS

Monitors

allow

GRC

Relay

testing

with

or

without

tripping

the

circuit

disconnect

device

.

For

the

Type

TMS

,

actuation

of

the

TEST

switch

disconnects

one

of

several

sensor

windings

from

a

parallel

arrangement

and

connects

it

to

a

120

VAC

source

through

resistors

which

set

the

test

current

level

.

The

test

sequence

,

which

is

also

printed

on

the

front

panel

of

the

monitor

,

is

:

1 1

FOR

"

NO

-

TRIP

TEST

FOR

"

TRIP

TEST

1 1

Operate

NO

-

TRIP

switch

UP

and

HOLD

.

1

.

1

.

Operate

TEST

switch

UP

for

1

-

2

seconds

maximum

,

RELEASE

.

Operate

TEST

switch

UP

for

1

-

2

seconds

maximum

.

2

.

2

.

Press

target

RESET

button

.

RELEASE

.

RELEASE

NO

-

TRIP

switch

.

3

.

b

.

Press

RESET

button

.

If

the

relay

or

monitor

oper

-

Do

not

hold

the

TEST

switch

on

for

more

than

2

seconds

.

CAUTION

:

ation

is

improper

,

recheck

wiring

,

voltages

,

and

interconnected

devices

before

resuming

tests

.

NOTE

:

Control

power

must

be

present

to

reset

the

target

.

DOUBLE

ENDED

APPLICATIONS

To

verify

the

operation

of

the

GRC

Relay

'

s

"

No

-

Trip

"

Interlock

used

on

the

main

breakers

in

double

-

ended

applications

,

the

following

procedure

may

be

used

:

close

the

interlocking

device

or

the

tie

circuit

breaker

,

or

temporarily

short

circuit

GRC

Relay

terminals

9

and

10

.

Perform

the

TRIP

TEST

.

The

relay

should

NOT

trip

.

If

terminals

9

and

10

were

shorted

to

run

the

test

,

BE

SURE

to

remove

the

short

at

the

end

of

the

tests

.

Courtesy of NationalSwitchgear.com

I B

7.1

.

1.7

-

1 0

PAGE

7

GROUND

FAULT

MONITOR

3

4

»

(

4

)

DIA

.

MTG

.

HOLES

6

-

32

HARDWARE

16

5

4

*

16

<

>

TB

2

7

8

9

10

II

12

3

5

=

O

8

7

3

i

16

]

AI

8

4

=

8

12

3

4

5

6

^

uL

-

\

cr

\

h

.

“

Ui

irnrju

T

TBI

fo

i

a

4

32

I

21

'

I

3

k

4

k

2

32

REAR

VIEW

SIDE

VIEW

FRONT

VIEW

FIGURE

2

A

:

TMC

MONITOR

OUTLINE

Al

1

Dimensions

In

Inches

HEAT

SINK

*

3

6

-

32

HAROWARE

<

4

)

(

^

DIA

.

MTG

.

HOLES

5

4

16

Tfl

V

}

ib

'

(

I

F

*

s

*

F

r

0

TB

2

7

8

9

1 0

I

M

2

I

3

]

o

8

7

3

i

16

o

1

7

4

i

]

8

4

k

a

1 2

3

4

5

6

JL

c

TBI

"

,

«

1

.

1

13

i

:

-

*

4

l

<

-

32

I

31

3

i

«

•

—

2

~

2

32

4

«

REAR

VIEW

SIDE

VIEW

FRONT

VIEW

FIGURE

2

B

:

TMS

MONITOR

OUTLINE

Courtesy of NationalSwitchgear.com

IB

7.1

.

1.7

-

10

PAGE

8

GROUND

FAULT

MONITOR

GRC

RELAY

-

TMC

MONITOR

INTERCONNECTION

DIAGRAMS

Notes

for

Figures

3

and

4

:

If

terminal

T

is

provided

on

the

type

GS

sensor

,

jumper

J

(

T

-

$

1

)

is

required

.

Wiring

of

earlier

versions

of

the

TMC

,

catalog

numbers

302

T

3010

and

302

T

3214

,

is

slightly

different

than

shown

below

.

1

.

2

.

See

note

under

MAINTENANCE

on

Page

11

.

ItO

VAC

1

DOUBLE

-

CM

)

*

"

-

1

I

,

—

li

-

ne

CD

sue

I

A

IK

.

I

&

1

9

n

l

7

TJjg

,

In

BftC

C

K

r

~

n

N

z

1

.

K

I

?

'

9

'

V

I

THY

I

52

110

4

T

~

•

t

No

-

nr

;

'

J

"

i

(

PIE

i

S

2

TEST

tv

,

*

I

i

x

-

’

Is

SENSOR

9

mart

-

a

s

6

PS

112

I

J

?

—

-

O

—

NO

-

TRIP

SW

4

t

-

Ai

<

£

=

0

—

0

I

2

OPTIONAL

I

-

L

MB

-

L

S

2

A

S

C

k

LOAD

i

*

FIGURE

3

:

GRC

/

TMC

with

120

VAC

Control

Power

I

TC

)

52

B

0

RD

HO

DC

CONTROL

PWR

.

T

OOUBLE

—

ENO

II

SUB

TIE

CB

A

-

o

9

V

-

91

—

L

.

CS

T

B

5

-

6

1

l

7

TMC

6

RC

I

,

.

C

=

K

O

N

T

.

K

I

)

Q

'

Q

'

O

'

0

=

K

THY

I

52

110

4

r

~

T

J

-

<

NO

-

TRIP

;

:

„

’

'

sw

I

SI

(

pm

i

K

52

TEST

t

\

>

s

*

I

i

SENSOR

I

e

4

,

o

<

?

RESET

e

6

i

12

I

PS

NO

-

TRIP

$

W

4

*

-

<

2

=

0

—

0

I

2

OPTIONAL

-

L

52

A

-

L

52

B

A

B

C

N

LOAD

FIGURE

4

:

GRC

/

TMC

wi

th

DC

Control

Power

i

•

0

I

TC

)

52

B

TC

)

S

2

A

<

-

)

Courtesy of NationalSwitchgear.com

120

VAC

52

Q

DOUBLE

-

END

11

-

TIE

CB

SUB

i

I

A

l

9

|

3

JU

CS

.

V

B

1

T

5

~

6

1

6

RC

C

7

S

=

S

=

K

r

*

?

1

N

i

1

I

K

I

o

I

i

I

30

O

)

Q

'

O

'

O

'

CRT

0

=

K

THY

I

30

52

m

REMOVE

T

-

SI

LINK

>

I

4

110

-

<

r

-

1

250

VA

T

OR

-

I

N

0

-

TR

1

P

]

l

-

H

SI

2

CD

I

LARGER

(

y

c

-

o

-

SENSOR

302

L

to

30

K

o

2

c

:

^

5

C

^

A

.

0

T

\

>

sw

2

o

z

TEST

I

z

o

I

H

T

|

le

>

o

c

:

30

ft

V

OR

R

|

SET

jq

z

8

6

302

T

2

I

2

l

J

?

—

-

O

NO

-

TRIP

SW

o

m

z

30

4

o

0

?

r

?

:

O

o

z

30

I

l

m

o

OPTIONAL

1

o

z

-

L

52

B

-

L

52

A

B

C

N

LOAD

o

0

>

a

30

1

>

2

t

/

>

TC

)

526

TCJ

52

A

#

GRD

GO

FIGURE

5

:

GRC

/

TMS

WITH

120

VAC

CONTROL

AND

120

VAC

TEST

POWER

-

o

—

>

•

cry

*

^

1

m

1

vo

©

Courtesy of NationalSwitchgear.com

120

VAC

TEST

PWR

.

{

+

)

DC

CONTROL

PWR

.

52

a

DOUBLE

-

END

II

—

TIE

CB

SUB

A

91

CS

9

B

"

I

T

5

ii

ir

i

6

RC

C

TMS

II

7

K

O

t

N

T

x

I

K

I

0

)

0

)

0

)

0

/

0

'

0

'

0

CPT

K

THY

I

52

lie

REMOVE

T

-

Sl

LINK

I

4

110

r

-

T

250

VA

-

1

NO

-

TRIP

i

>

I

T

-

SW

ill

OR

GC

SI

I

o

LARGER

(

¥

'

^

-

o

-

SENSOR

302

L

z

t

\

3

S

*

£

TEST

o

I

5

z

:

I

8

3

ft

<

9

OR

Ll

_

8

6

302

T

|

9

I

NO

-

TRIP

SW

jr

—

PB

o

-

O

z

3

4

o

M

-

0

cc

o

I

OPTIONAL

-

1

-

52

A

-

L

52

B

A

B

C

N

LOAD

a

I

(

rc

)

52

A

(

TC

)

52

B

(

-

)

o

#

GRD

i

r

»

•

o

FIGURE

6

:

GRC

/

TMS

WITH

DC

CONTROL

POWER

AND

120

VAC

TEST

POWER

r

*

.

ui

o

00

<

—

a

.

Courtesy of NationalSwitchgear.com

IB

7.1

.

1.7

-

10

PAGE

11

GROUND

FAULT

MONITOR

TESTING

I

.

MAINTENANCE

AND

RENEWAL

PARTS

No

routine

maintenance

is

required

on

the

monitor

.

Follow

test

instructions

to

verify

that

the

unit

is

in

proper

working

order

.

We

recommend

that

an

inoperative

unit

be

returned

to

the

factory

for

repair

.

The

control

power

indicating

lamp

is

a

plug

-

in

device

.

Replacement

lamps

may

be

order

-

ed

from

the

factory

.

The

pins

on

the

lamp

must

be

properly

aligned

when

reinstalling

in

the

socket

.

If

you

are

replacing

an

earlier

,

dual

-

rated

{

120

VAC

/

125

VDC

)

version

of

the

TMC

Monitor

{

Catalog

#

202

T

3010

or

202

T

3214

)

with

the

present

design

TMC

covered

by

this

instruc

-

tion

book

,

all

connections

are

the

same

EXCEPT

the

wire

on

terminal

9

of

the

older

unit

moves

to

terminal

2

of

the

new

unit

.

Note

:

2

.

HIGH

POTENTIAL

TESTS

If

a

control

wiring

insulation

Do

not

apply

high

voltage

tests

to

solid

-

state

circuits

,

test

is

required

,

bond

all

terminals

together

before

applying

test

voltage

.

3

.

TESTING

Periodic

testing

is

recommended

to

confirm

proper

system

operation

.

Ope

rationa

1

Tests

Refer

to

"

OPERATION

"

section

,

Page

6

.

in

open

position

,

providing

control

and

test

power

is

available

,

additional

recommendations

on

Field

Testing

of

Ground

Fault

Systems

.

Bench

Tests

(

with

Type

GRC

Relay

)

If

bench

tests

are

desired

,

we

recommend

that

the

monitor

be

tested

with

a

type

GRC

surface

case

relay

interconnected

as

shown

in

Figure

3

to

6

,

as

appropriate

.

Follow

the

instructions

in

the

"

OPERATION

"

section

,

Page

6

.

To

apply

current

signals

to

the

GRC

relay

use

the

test

circuits

shown

in

Instruction

Book

IB

7.1

.

1.7

-

5

,

including

a

type

GS

sensor

.

Bench

Tests

(

without

Type

GRC

Relay

)

If

a

relay

is

not

available

and

a

target

or

auxiliary

relay

operation

test

is

necessary

,

connect

the

monitor

to

an

appropriate

control

power

source

as

shown

in

Figure

7

-

Operate

and

hold

the

TEST

switch

,

then

depress

the

external

test

pushbutton

momentarily

to

short

circuit

terminal

7

to

terminal

8

.

Target

shall

operate

and

auxiliary

relay

(

if

provided

)

will

pick

up

.

Release

TEST

switch

and

operate

RESET

button

,

if

repeating

tests

.

Continuity

of

test

circuits

in

monitors

can

be

checked

by

means

of

an

ohmmeter

across

terminals

2

and

9

(

Type

TMS

)

or

8

and

2

(

Type

TMC

)

.

Operate

the

TEST

switch

to

take

a

read

-

i

ng

.

Tests

can

be

performed

with

the

circuit

breaker

Also

see

IB

7

-

1

.

l

-

7

'

9

for

Leave

the

target

in

the

orange

position

after

finishing

bench

tests

and

prior

to

instal

-

lation

in

switchboard

.

INITIAL

CHECK

1

Refer

to

section

,

Page

3

•

fO

R

TMS

t

I

/

FUSE

I

'

+

)

OR

AC

!

1

T

c

l

I

EXTERNAL

PUSH

-

BUTTON

+

H

CONTROL

POWER

SOURCE

(

PER

NAMEPLATE

)

OHMMETER

(

m

rz

?

DIODE

BRIDGE

I

:

s

0

8

I

MONITOR

012

2

I

4

I

ft

I

(

-

)

OR

AC

2

I

i

—

i

FOR

—

'

\

TMC

BENCH

TEST

WIRING

FOR

CHECKING

MONITOR

WITHOUT

GRC

RELAY

FIGURE

7

:

Courtesy of NationalSwitchgear.com

ABB TMC User manual

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