Onan LTC, LTC 400, LTC 1200, LTC 800, LTC 2000 Operator And Parts Manual

TABLE

OF CONTENTS

LOAD

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INTRODUCTION

This
help
trols.
necessarv.
this

manual
control
tacting
always
the

full
This

among

manufactured

AF

lF

Z

D---

3[\-

2l\

2OO

Dl>-

LTC[---

Onan
install,

LTD

operate,

series

Keep this

The

are

designed

remote

starting

a dealer

supply the

serial number as

information is

the

many basic

by

Onan.

EXAMPLE.

spr.

Letter Advances
modification
changeable.

spr"

No.

No.

1

advertised.

Diagonal
specification.

Coc]e

No.

wire

and

7 is

I20/240-volt
4-wire
3-phase

code

trol

considered
6Gcycie
cycle

3-phase;

No.

serves

use

, mpete

-

Serie.s
'lontrol

charging

manual

and

maintain line

nranual handy'

transfr:r

load

to be

generating

or the factory

complete

Model and

shown on the nameplate.

necessary

and

special

MODEL

DESIGI.IATION

LTC2OO.23/1A

resulting

-

Identifies

designates

-

(Units

phase.

delta,

(Tens

for both

standard.

use

only.

Ratin(.

LTC

for

2-wir:

system.

no

Separates

Digit)

1 is

l-phase;

5D

center

Digit)

only.

Designate

remote

ccntains

information

transfer

refer

and

to it

controls described

with

used

plants.

about

identify the

to

Spec

Onan

When

this

2*ire

control,

No.,

control

optional tl'pes

with procluction

parts

in

optional

not inter-

equipment.

options or basic

basic

model

-

Designates voitage,

120-volt;

is

I20/24gro1t

is

2

4

is

120'208-volt

24[fvolt;

tapped.

-

2 designates

No.

6Gcycle

5G or

No.

omitted

No.

5 designates

s Onan

sirut

and is

designates

Transfer

Load

24-vo1t

to

con-

when

in

con-

plus

as

from

4wire

con-

5G

battery

TYPICAL

MODEL

MANUFACTURER'S

J'he

Manufacturer
product
and factory
operated under normal conditions
fa cturert s instructions.

Manuf
correcting
thereof
Ar:thorized
within
user, and which
Manufacturer's
Correction
replacements
of all

This
products which

which
or which
Manufacturerrs

Manufacturer
directly
cause.

The
warranties,
or obligations
deeler
Manufacturer

liability

in writing

DATED

of its

acturer's obli6iation

which shall

one

obligations to

warranty

have

shall

or

above warranty

is

authorized

in connection

and

AUGUST

rr,,arrants,

manufacture is free

workmanship

without

Service
year

of

indirectly

charge

be

Stations,

after

upon

satisfaction

defects

such

for defective

original user.

not apply

shall

must

subject

been

expressed

have

factory

shall

on

nor to

signed

been

not be liable

part

l,

returned to

being

examination

be

unless

from

supersedes

or implied,
of

give

to
assume

with any

by

an

1963

to the

properly

if

under this

its

at

transpg*ation

put

have

to

try repair

parts,

to

replaced

misuse,

to

repaired

authorized

the use

Manufacturer.

any

for the Manufacturer

officer

LTC

WARRANTY

original

from

installed,

according

factory any

its factory or

irlto

been originally

shall

any

because

or dltered

loss,

for

of

and

and

warranties

its

of

of the

user,

defects

warranty is

charges

service by

disclose

shall

or supplying

to,

constitute

of the Manufacturer's

of

negligence

the

by

damage

product

its

is in lieu

of all other

person,

No

on behalf

products

Manufacturer.

that each

in

material

serviced and

the

to

outside

Manu-

lirnrted t o

part

normal

Manufacturer.

parts

or

one of its

prepaid,

original

the

to the

def ective.

fulfillment

wear,

or accident

of

or

expense

or from any

of all other

liabilities

agent or

of

other

any

made

unless

of

the

the

rl

TIME

DELAY

RETRANSFER

RELAY

(Optional)

o

o

o

VOLTAGE

RELAY

SENSITIVE

(Optional)

L----).

BATTERY

CURRENT

CHARGING

METER

BATTERY CHARGING

CURRENT

ADJUSTMENT

FUSE

TIME

DELAY

STARTING

RELAY

(Optional)

BATTERY HI.CHARGE

LIGHT

EXERCISER

HI-LO

o

f

r

OPERATION

swtTcH

REMOTE

CONNECTTONS

(Optional)

CHARGE SWITCH

SELECTOR

CONTROL

SWING

OUT

PANEL

NEUTRAL

(Optional

on

Most

BAR

Models)

TRANSFER

SWITCH

L

TC200

FIG.

I

./OL

iAGE
Back

USS

BATTERY

CURRENT
TIME

DELAY

RETRANSF

SENSI'TIVE

of

Panel

Unless

arrd

ADJUSTMENT

ER

(Optional)

OSS

CHA,RGING

RELAY

(Optional

BATTERY

CUPF

F'NT

RELAY

CHARGING

METER

S\t,ING

PANEL

OUT

FUSE

tl

ilf

TRANSF

NEUTRAL

(Optional)

TIME DELAY

REHOTE

R

E

swtTcH

BAR

r:

X EF.CISE
(Optional)

Back

R

RELAY.STARTING

(OPtional)

Panel

of

CONTROL CONNECTIONS

HI{-O

CHARGE

SWITCH

BATTERY

5-.

HI.CHARGE LIGHT

FIG.

LTC400

4>

I

-.:'

.'

;

:

i

t

-'

2

DESCRIPTION

(load

The

use with Onan
plants
generating plant
gency power

power

series

Onan

installed for standby service.

to the load.
commercial

during

LTC

2-wire, 24-voLt, remote-starting,

operation, supply of c-ommercial and emer-

transfer

assures a supply

It

power

failures.

CIRCUTT & COMPONENTS

The basit:

1.

Load
cial or

2. Relays
the bansfer

3. A battery
full-charge.

NOTE:
in

conjunction

explained in

0perotion
let

switch is electrically
commercial or emergency
rating is

includes:

LTC

transfer switch that connects either

power

emergency

to start and stop

switch.

charga which

the

Use

determined by

wirin! dia(,ran

with

[vtaintenance Section).

-

(Mechonicolly

to the load.

the

maintains

flis

explanation

Tronsfer

Held

operated and

power

the transfer switch capacity.

control)

The

generating

starting

lumished

Swirch):

connects

source. An

is

designed fot

LTC

of

the commer-

plant

batteries

with

(wirin{

LTC's

generating

controls

emergency

and control

at

the

control

diagams

The frans-

the load to

current

relay

stop
plant.
engine
switch
coil
pilot-relay
coil

The
fer

switch

is

energized
generator
switch.

Normally
line-side
fer relay

de-energized.

When

transfer
relay
builds
the latch
line
erator

controls
When the relay
control to
pilot-relay

and

the

energizes,

pulls

that

instant

and

side

(with

is

are

conrmercial

rr:li1s

contact,

up, the

r.lisconnect

contacts

supplies

starting

start and

controls

generator

in

the

transfer

closed.

relay

also

the

from

line power,

and energizes

cominercial

The

energized;

power

de-energize.

signaling

hansfer

coil

open,

generator

power

to

and

stopping

de-energizes

run

the

the mechanical

side of
it releases
generator

switch

the

bansfer

the latch

side of the

conhols

generator

start-stop
the transfer

fails,

the

and generator-side

the load.

the lineside

side.

it

breaks

the line-side

power

on)

relay

the

start-stop

This

plant

to

pilot-relay

contacts

its

contacts

plant.

Whenever

the

the

and

switch

closes

start.

pulls

close,

of

generating

the

signal

The

transfer

latch

release

switch.

and

transfer

coil.

When

connects

switch.

of the

this relay

circuit

of the transfer

transfer

the

switch

instant

pilot-relay

and instant

start-stop

voltage

When

in,

energizing

The main

and

the

the

the

the

trans-

to the

trans-

is

gen-

All transfer
one

set connects the

connects the emergency
(when

tacts. A mechanical latch
and opens a micro-switch
This

Another
anical latch
These contacts must

erator

pulls
mechanical
closing

The 6asic control

1.

Start-stop

2.

Transfer switch

3.

Instant

5-.

In addition,

srvitches contain

commercial iine

energized by line

eliminates hum

coil

contacts
in

and

and electrical inter-locks prevent

at the same

transfer relay

it

during normal operation.

(energized
release, disconnecting

can

close.

holds

the

time.

circuit

relay

pilot-relay

may

contain

two separate

power

power)

then

that

disconnects the

plant

by

unlatch

and

Power supplied to this

generator

consists

some optional relays.

sets

to rhe

to the load.

pulls

in

the

locks

the

output)

operates

the line-side

out before

drop

contacts closed.

I

r.;f

hre,e relavs:

of

contacts;

load,

the

pull-in

A
lineside

contacts

closed

pull-in

the

contacts.

the

coil also

contacts from

The

other

coil

con-

coil.

mech-

gen-

Both

start-

When

commercial power

closes
transfer
ately.
stop

High
rate

(100

batteries
switch

rate

Load

separate cabinets,
battery charger, and

contains

8ft)- or
actuated

(on

contacts

which

disconnects

switch

the

At

same

generating

the

Rote Bottery

of

about 2-amps

-

500

milliamp,

once

on the

is on;

Tlzrnsfet

the

inner

the

Control

the transfer

120Gamps

by

small electric

back of

from

being

and

charged. Both are controlled

meter indicates

one cabinet

returns,

allows

time, the

plant.

Chorger: This

to

boost low

adjustable with

panel.

LTC800-1200

optional equipment.

switch.

and has non-tripping

the switch)

closed

the instant

generator

the

the line.side

start-stop relay

charger

batteries

rheostat) to maintain

light

A

motors. A mechanical interlock

at the same

indicates

the low rate

contains the

The

transfer switch

prevents

is contained in

time.

hansfer

side coil of

pull

to

The

line and

in immedi,

energizes

includes

and a low rate

when the high

charge

control relays,

other cabinet

circuit breakers

a

by

a toggle

cunent.

is

rated at

generator

relay

the

to

high

two

OPTIONAL

the most

Only

Time Deloy Reloys:

EQUIPMENT

popular

options are

A

or more of the control

pickup,

load

engine stopping,
line. Two different types
the

function to

(See

Adjustnents

relay

delay descriptions.)

Tine

Delay on

failure.

be

delayed and

in the

Staftin(: Delays

prevents plant

It

failures.
Time

Delay on

to

allow

Tine

for

Delay

plant

on Re-frans/er:

commercial power

The

plant

load.

Pickup: Delays

Load

warm up.

to

stabilize before connecting

supplies

discussed

time delay

is often

functions such

load transfer

of relays are used,

the

here.
required

engine

as

to commercial

depending

required delay

Maintenance Section

plant

starting

after

operatiorr during very short

the

transfer

for

during

time

this

period.

Allows

power

x/c

c
N/o

for

of

the

in one

starting,

on

period.

complete

power

a

line

the load

returning

to

it

the

line

voltage
energizes,
line

voltage

initiates

over-voltage

In
when line
initiating
drops to

power.

line

Ttrese

relays

in

applications

falls

starting

returns

the return

application

voltage

the

transfer

normal,

can

where low

equipment.

A non-adjustable
Though

operates
and

it

at fixed

pickup

is

at

similar

90%).

protection.

-

TABLE

I

Moximum

Adiustoble

to

the drop-out point,

the hansfer

to

pre-set

the

to commercial

the

becomes

the relav

also

excessively

generator

to

be

used

returns

voltage

voltage

voltages

sensitive relay

in

operation,

(drop-out

[t

be

can

ond

Minimum

Voltoge S

the relay

to

emergency

pickup

power.

voltage,

power.

relay

is

normally
high,

the relayopens,

power.

to

When

the load

to commercial

disconnect the

could

damage the

is

the non-adjustable

70%

at

used

of line

only

for under-voltage

Seilings of

ensitive

Reloys

When

the

relay

closed, but

line

voltage

generator

load

available.

relay

voltage

0NAN

de-

DROP

OUT

CONTROL

Time

Delay on

to run for

stabilizes

Stoppin(

few minutes

a

engine

;!;

Voltoge Sensitive
complete failure

a6!e sensi tive

drop and also

Each

voltage

relay

connected across

.q

capacitor

Reloys:

(about

relays

allow

higher

to

sensitive

(connected

maintains current flow
flows

The

through

pickup

re,ctifier.

the

control

consists of
which is connected in
coil. The
current-flr-,w
consists of
relay

current by-passed

by-passed

and
application,

pickup

control operates

through the

a wire wound

coil.

operates

It

around

cunent

lowers

drop-out voltages

relay is

the

PICK

UP

CONTROL

FIG.3

(A|tet

Re-/rans/er);

no-load

under

temperature,

The

basic conhol reacts

of.

5V"

than

nominal line voltage). Volt-

it

to react to

normal

voltages.

relay

consists

output

the

of

across the output of the

half

the

during

a wire-wound

series with

increasing

by

relay

coil. The

potentiometer

increasing or

by

the relay coil. Increasing

the dropout

adjustable.

are

connected

across

Allows the

before

reducing

distortion and

pre-set

any

of

a direct

a half-wave

cycle that no cunent

potentiometer

the rectifier

or decreasing

dropout control

parallel

in

decreasing

voltage. Both

under-voltage

In

the

L2

LINE

L1

plant

shut-down.

only to

voltage

current

rectifier.
rectifier)

relay

and

with the

the
the

pickup

line. When

TYPE

RELAY GEN. STARTING

Under-Voltage

Over-Voltage

Non-odiustoble
initiate

voltage

Adiustoble
to standby

transfer to

back

and

Low Voltoge

between

between 7Vo

voltage

differential

54vo

Normal

105%

Normal

Voltoge Sensitive Reloy: ke-set

Low

standby

to the line

54% and

and l\Vo on

is 5%, and

line voltage.

Adiusloblc
to

standby

between

and
Minimum
normal line

Mechonicolly
fied on all

side

line

Exerciser: The
regular
may be

load

intervals
ordered so the

(depending

starting by
charged.

Voltoge

High

between 105%

100% and lll%

voltage differential

voltage.

Held Contocfs:

switches.

amp

are standard.

exerciser automatically

allows

and

plant

on

installation).

the

keeping

the

In

the

even:

luel

of
exercising at no-load, the
load

to

the

generating

plant.

GEN.

of 70Vo to

to 96%

Voltage Normal

l15% of 100?o to lll%

to

Voltage

power

90%.

at

ioor" . ilt"

Normal

at 70%

Sensitive Reloy:

96% of. normal

retransfer

maximum

Sensitive

and llSvo

on

5%, and

is

(Generator

Mechanically

the

to

is

Reloy:

normal

of

re''transfer

maximum

Side)

held

starts the

it to run

operates

for a

with

This assrues

system

filled and

power

a

conhol

failure

while

immediately

STOPPING

100% of

Voltage

Voltage

normd line

of

Initiates

transfer

line voltage,

line.

Minimum

of normal

17%

Initiates

transfer

line voltage,

the line.

to

is 17qo of.

may be speci-

contacts

plant

pre-set

or without

time. It

normal

emergency

the batteries

the phnt

switches the

o

"t

on

to

and

the

at

is

Auxiliory Conlocls:

the transfer

mounted

are

l2Gvolts,

These contacts

on

3-amp at

are

Extra

24$volts,

for

used

single-pole

switch.

and

circuits'

signal

double-throw

Rating

1.9amp at

is: Gamp

contacts

at

48$volts.

Signol
of

...commercial
started
important

Simuloted
operated switch
the normal

plant

the

0perotion
selector
the same

the

from

not

will

it an

set
assuming

Fully

trolled

chargers.
Cadmium starting

with built-in
nected
As the
charging

the

to
batteries
equalize-charge

(Most

Lead-Acid

equdlize

of

charger's

the
charging
tined
float voltage.

ond Alorm

Lights

and is supplying the

your

to

Power

load. The switch

when switched

Selector

switch

functions.

transfer control.

load

:;tart

automatic.

the load

Automotic

rectifier)

Designed

Equalize
battery
battery

current
steady-state

charged. For

fully

charging every

voltage

interval,

Terminols: Available

power

failure...the standby

;rpplication.

Foilure

starts the

to o/f.

Switch:

generiitirig

on

the

three

Its

failure.

line

upon

Check

fcr testing.

Sottery

continuously
approaches

automatically

timer

Battery

output

Chorgers:

constant

are

for float

batteries.

Charge

load on

for any

Manufacturers

month).

voltage

for

time

the

Timer automatically

the

load. . . and other

Switch:

Test

plant

and allows

is normally

This switch

plant

control

positions corrhol

In

position

voltage,
charging
Transistorized

Timer.

floats

full-charge,

tapers

the battery

fast charging,

time

and

selected.

psition,

sfop

For autonratic

starts

Using

Lead-Acid

A

at a constant

preset

to

period

recommend

Setting the

maintains

At

a warning

as

plant

conditions

This manually

it

to assume

on

is

SCR

permanently

zero amperes

manually set

switches

and

similar

box and

plant

the

(silicon

current

or

units,

voltage,

keeping

to 12

up

Timer

the
end of the

the

will

to the

the

the
operation

without

limiting

Nickel-

complete

voltage.

starting

24

raises
higher

back to

has

start

has

plant

plant

con-

con-

the

or

the
hours
hours

recommends

ONAN
by an

experienced

precautions

and

LOCATING THE

point

The
electrical circuit
of

entrancer
the
output and ltrad
maximum plant protection,
breaker
as the
p

lant.

at

switch.

commercial

with the same capacity and electrical characteristics

plant

connected between

that load transfer controls be installed

electrician, observing

local

codes.

CONTROL

which the

line before

should

load

varies according to

There must be

be similarly

transfer

the control.

have a fused

cuts

application and type

a switch and fuses

protected.

the load

INSTALLATION

normal

all

into

Both

switch

transfer conhol and

safety

the existing

generator

the

provide

To

or

circuit

in

When a standby
service,
switch
is
the circuit
distribution

If the entrance
and
most modern
meter and
ahead

it

is normally installed

and the

limited to

main

of

LOAD

disbibution

a

single

after

the

panel

switch

fuses

homes) cut

switch. Then

the load transfer control

WIR

ES

plant

protects

panel

emergency distribution

entrance

(Fig.

in

are

8).

is of

a

into

install

switch

compact type where

the

single

the

the

complete electrical

between

(Fig.

cabinet

main

an additional
(Fig.

the

If

7).
panel,

fuses for the

(such

entrance

6t.

main

entrance

protection

the

emergency

as used

between

fused

inb

cut

branch

switch

in

the

METER

r-,i.dE

FROM

SERVICE

E NTN

ANCE

LOAD

TRANSFER

CON TROL

PLANT

CONTROL

BOX

FUSED

swtTcH

BOX

R EMOTE

CONTROL

I

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SIDE

WIRES

FROM

OF

TRANSFER SWITCH

WIRES

GEN.

FIG.

4

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LTC 200

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perfornred
enough
wiring the load,
their
and

to meet local elechical

to carry the controls

line and

electrical charapteristics:

number of wires.

MAIN

POWER

SUPP

Wiring:

generating

In all

ADDITIONAL

LY

lo''rri

All

codes.

rated cu:'rent.

plant,

number

cases, the

FUSE

swtTcH

of

load,

D

/

wiring should be

[Jse wires

The details of

wi

pha:;es,

line and

[

heavl,

Il

depend

."- TRAISFER

on

voltage,

gen-

CONTROL

FIG.

5

erator,
switch.
the

transfer

given

with

-1

will

under

your

be connected

The

correct

switch

each drawing

specific

electrical

positions

load, Iine).

Qgen,

shown

l__t

tl

-l

T' 60" LTC 8OO
x'66"

CABINET

directly

for connection

here for

characteristics.

_

--4

:o

/200

Lrc

to

the control

Follow

the trander

B

bansfer

are marked on

instructions

the

switch

INSTALLATION

USING

COMPACT

NE

LI

IAB

I

L

ENTRANCE

SWITCH

AB

AB

FIG.

7

6

1

I

J

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GEN.

LOAD

I

t-

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L

coMPAcr

ENTRANCE

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SWITCH

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-

I

J

tNsrALLATroN

-

Ihe load

rnight
wires.
be
remedied
ated

fiol

selected for operation

happen

In that

100%

overloaded,

bv rewiring

during ernergencl,is

wires.

CONTROL

The load transfer control is
Type

l box for indoor wall

frnm

excessive
control
support
Secure it
the

on a

where it

with bolts or screws through the holes

back

of box

BETwEEN

to be

served by only one

case, half of

the

the fuse box::o

served

MOUNTING

mcisture,

heat.

vertical

wall,

will not be

(nig.

5).

WIRING

Before rviring
line

with er suitable

ahead of

the

the

controi,

switch and

load

hansfer. All load

ENTRANcE

during

a 120/240-volt

other

haif idle.

e.qualiy br

normalll

mounting.

dust.

switchboard, or

subjected to excessive

provide

fuses

AND

DrsrRrBUTroN

emergclncy service

of the two

gene:ator

'firis

the loao

supplied

It shouid be

anC

the cornmercial

(or

circuits shoulci

to be

each

rn a

dirt.

other

provided

circuit breakers)

FIG.

lol

line

would

can

br,

oper-

of

the trvo

NEMA

protected

Mount the
permanent

vri'ration.

in

power

llso be

pANEL

--

7

properly

controls

fer

control

f

.

ilire

2.

Wire

trol

load

Contro!
control
up

to l0Gfeet,

as

specified in

the

wires using

Control

Connect
transfer
control
remote

-

_J

fused.

before

conhol between

load from

If conduit is

wires in

Wiring:

and

Circuit

the wires

control

box,

(Fig.

Install

vriring

wiring

e an

separate

Three

generator

use

the

the following

Color

to the remote

9+ to B+,

9).

line, generator

#14

plants

orsrnreurroN

I

A

cABINET

r r

and operate

the load

he

used,

control

set

Code:

from the

transfer

accomplished

control

wire;

and

set, and load,

run

the control

conduits.

wires

connect the load

{rotmd,

B-f,

for longer runs,

manual.

color

code

B+..........Green

Ground......White

Remote.....

terminal block

terminal block in

{round-to-{round,

plant

the

control.

in

two

generator

(low

remote.

and

possible,

If

for

uniformity.

Red

I

I

from its

Load trans-

steps:

set.

to

the

voltage)

transfer

For

use larger

colorcode

in

the

the

remote-to-

and

own

con-

and

runs

rvire

load

plant

MAIN

POWE

R

SUPPLY

STANDBY

EMERGENCY

INSTALLATION

R

METE

ENTRAN

SwtTcH

DISTRIBUTIOI{ PAN

I At

CE

FOF

DTSTRIBUTION

PANEL

FUSES

I

I

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FUSES

OR

CtRCUlr

BREAKER

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(when

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u

F-.

orsrnlBurtoN

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powER

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I
I

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- -q

i

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I
I

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I

I

I

STANDBY

uNtr

coNTRoL

POWER

Box

PLANT

REMOTE

CONTROL

M

AIN

POWE

R

GND

B+

WIRE

CONNECTIONS

I

PHASE,

WIRE

2

L

nemotE

ST AND BY

POWER

B+ GREFN

WHITE

GND

REMOTE RED

coNTRoL

WI

RES

FIG.

9

MAI

POWER

I

PHASE, 3

N

WIRE

STANDBY

POWER

M

AIN

POWER

PHASE, 3 WIRE

3

STAN

POWER

DBY

FtG. l0

FlG.

I

|

|

MAIN

POWER

3 PHASE,

4 WIRE

STAN

POWER

DBY

MAIN

neutral is

lf
ground

neutral

wires

tral

load

and
remaining terminal
section

to be

neutral bar.

to

option

ronr

f

should

of

the

is inclujed, the

transfer

POWER

SUPPLY

74O

v.

grounded,

lf

the

i-enerator.

t:e

<;onnected

in each

svrrtch.

120

v.

connect

switched

ine

respective

NEUTRAL

r

r20-v.

r20

V.

neu-

line,

the

to

STNGLE-pHASE,

LII{E

NEUTRAL

OPTIONAL--'=a

BAR

3-WlRE,

FrG.

GEN.

LOAD

120/240-VOLT

12

TO STANDBY
POWER

UNIT

i

I

t

i

t20-v.
t20-v.

240-V.

THRE

E-PHASE,

legs connect

Three
of thc transfer
wires are
neutral bar
cabinet.
equipped,
connected

and taped.

connected

lf tlre

ground

wi

th

switch

in

the

control

solderl

MAIN

POWE

SUPPLY

HAIN

SUPP

lrne

the

to

all

anC

optron:rl

the

to

load transfer

is

wirr:s can

t:

connectcrs

5s

R

POWER

LY

srde

'etrtrrl

not

so

be

LINE

FlG.

I

TO STANDBY

POWER UNIT

3

TO STANDBY

POWER

UNIT

THREE-PHASF.4-WIRE

NEUTRAL BAR

OPTIONAL

FfG.

r0

14

CHECKING

Phase relationships

any

motors
normal
ship
line

Connect

to the

rotation.
phase
direction, change
two of
switch line-side.

Next, turn

motor

direction

two of the three main

side of the transfer switch.

PHASE

3-phase

are to rotate in the

and emergency

as

follows before

to load.

a lphase motor to the load

line

If

relationship

the three main

off

rotation

of rotation

RELATIONS OF

determine the

motor.

side

the

the

Phase

power.

of the transfer

direction of

is

correct.

the direction of rotation

phase

power,

main

powered

when

is

phase

3.PHASE

A

direction of rotation

relations

proper

Always check

operating generator or

rotation

leads

start

by the

conect

wrong,

leads on

must

direction under both

phase

terminals

switch)

If it rotates

connected

is

generator

the

generator.

it

the

and

correct, the

by

on

by

generator

STANDBY

be correct

relation-

connecting

(and

power

check motor

lines

in

the wrong

reversing

the transfer

reversing any

and

any

check

the

If

(GEN)

of

if

THREE.PHASE

In some
from one leg

protected
transfer
all emergency
4wire

service

for

this

with

the

stand-by

switch.

Wiring this type of conhol can become

cedure,

of

operated

only
service. If
of a control in
full informatiur.

depending

Sphase

with a thorough knowledge

SERVICE

cases,

control. This

service should

leg of

power

during

emergency

ground

to

by

a

singlephase generating

lights

ground.

to

the commercial

connected

on the

balance, and

power

a

questions

arise

this type of

AND A SINGLE-PHASE

singleahase loads

of

a

4-wire .lphase service

is

often

are connected from

The load transfer

be wired

to the

electrical
a knowledge
failure.

conceming,

service,

in institutions

done

to the

power

line

service, the

It should

of

the buildings

the use

contact

STANDBY

connected

and load

plant

l"g

one

control

generating plant

protected

to

be

of the transfer

side

a complicated

problems

of

loads to be

the

be attempted

electrical

or installation

furnishing

Onan

can be

where

of the

used

by

pro

when

the

with

the
noted.
on sfop,
toad
stopped
the
Operation

The

transfer.

from

load

operation

plant

control

plant

plant

the

the

transfer,

Selector

Selector

switch,

conhol

stops

When it

load

transfer.

set the

switch

switch

the

following

switch

and

cannot

is on

run,

plant

will then

is

used

in

points

predominates.

be

started

the plant

To

control

switch

start

on

and

the

remote.

stop

OPERATION

conjunction

should be

when

it

is

from

the

cannot

plant

the

be

from

The

plant.

BATTERY

Set the
full-charge.
charger
weeks
chargerate
rates
changes

CHARGING

trickle charger

and checking

with a hydrometer.

will

shorten battery life.

wiil

This

can

that

wrll rnaintain

probably

CIRCUIT

to maintain

best be

the battery

require

done by

Adjust the charger

charge

Large

charger

plant

the

setting

condition

for the minimum

condition.

ambient

adjustment.

batteries

the battery

for

temperature

at

several

Higher

Before
setting
start
line
control,
now ready
cial
cial
supply

settlng
the

(but

fails.

set the

power

iower

the load.

plant

not take over

for
fails.

0PERATI0N

operation

The
holled
switch:
does
this
shuts
this
position
failure
starting

TIME

All time

wise
shown

adJusted

from

the

In

the

not

assume the

posilion

down the

position

allorvs

occurs.

and stopping the standby

DELAY

delay

in

stated

in

Table ? If

(see

plant

the

csntrol

With

the

plants

autonratic operation

As a test, the

can

be opened.

SELECT0R

selector

load

check

for

manual

plant

plant

for

the

This

RELAYS

relays are

order

the

enmce).

l/ainf

for

switch

the.

commercial

switch

S\VITCH

switch allows the

transfer

position,

unless a line fail'.ue occurs.

load

plant

prevents

and

repairs and

plant

to assume

is

the normal

(Optionol)

set
specifications, relays

necessary, these

remote operation,

run.

on

load)

at

and

entrance

The

The

unless

power

connected

remote.

will

sw,itch of commer-

plant

should start

(Optionol)

plant

control.

the

excrcise.

at the factory.

It is

plant

starts and runs

Tirc

it

from

servicc,

the

po.ition

plant.

settings

a

lo;rd when

(or

test it

plant

the

commercial

The

control is

start if commer-

to be

three

s/op position

sturting.

The

automatic

automatically

Unless

are

should

to

con-

positron

Use

Use

line

a

other-

set

can

by

the

and

but

as

be

EXERCISER

The

exerciser

and length

plant

the
days

as

least

at

period

long

CLOCK

clock

of

exercise

for

any

is

desired

3Gminutes

each

EXERCISE
PLANT AT
AND

STOp

requires

periods

multiple of

.

week is

Onan

once

CLOCK

9

P.M.

AT

lT

recommends

a

better

setting to

1$minutes

week. Running

SET TO
EACH

p.H.

t0

determine

each week.

per

running

than several

START

FRIDAY

It

day

the

short

the number

operate

will

as many

for

plant

the

plant

for

periods.

for

one

TAdLE

Dclay

Dclay on load

Delay

Delay

-after

.

2

In

on

on

retransfer

TIME

(Unlesr

starting

plckup

retransfer

plant

stopping

DELAY

Othc:wlsa

RELAY STANDARD

Spoci!'led In

l0

SETTINGS

Ordor)

l'1ln - Hagen

;;;";;l

-

Mln

Hagon

l0

I

i

t2

The clock
day hours,
with the
operation
in

the inside

row

side

The

specific

spoked

spoke

wheel beiow

for

FrG.

is

equipped

shaded half

clock for a maximum

is set

in the

row of holes

stops the

days

no

which

for night).

following

plant.

plant

the

the

daily

ererciso

with a

starts

dial.

l5

24hour dial

Ten trip-pins

of

five
manner:

plant;

the

is

to

operate

place

period

is

(light

are

operations

A trip-pln

pin

a

are

set

pin

a trip

desired.

half for

supplied

daily.

placed

out-

in the

on

tne

in

each

Example:

An

Fig.

i5

tc

10:00 P.M.

c,ock

for
spoked
pointer
Ielt hand
the

correct

dial

nut.

shows

the
wheei
on

the

thread

time.

the,-lock

Fridav

correct

to

aiiarr

spoke

oral

rright.

dav

the
spring.
lock-nut

After

set to

rrVith

and

time.

correct

setting

exercisrr

prns

the

To set the

day

To

set

and turn

the conect

ihe

in place,

with

thr:

tirne,

the rlial

plant

for

sei the

day,

turn

the small

loosen

by

hand

time,

tighten

9:00

the

day

the

to

t3

MAINTE}IANCE

PERIODIC

At

regular
Clean
and

dirt
plete
wiring for

OX&{

The
control

the

Use

To

1.
To

2.
To

3.
To

4.

Here

wiring diagram

their approximate

in

time delay on

relative
the
shown
enclosure
tabeled
For example: Panel

rear).

the

SERVICE

intervals

required.

as

can

cause hum, irregular

breakdown

WIRING

wiring

is

wiring diagram:

explain control
obtain
deternine the

aid

are some hints on

positions

same

d*arct(ized unless

to

of the

loose

or

DIAGRAITS

diagram

your

key to the

part

in coatrol

is a semi-pictorial.

starting

you

as

metal

indicate

inspect inside

Always

dirty

nunbers

function

of the terminals

see them

is

the

keep the

system.
connections.

fumished with

control.

operation

ordering repair

for

of

all components

repair

reading wiring

position

shown

Rear

and

relay

in the
otherwise

in dotted

direction

View

FtG.

and named by

l5

the

cabinet

cabinet

operation,

At

the

every

Keep

diagrams.

[t shows all

the start-stop

on
control.

lines.

viewing and location.

of

(inside

clean.

or even a

same

time,

lmd

it

vith

parts

function,

each component

All relays are

The outside

noted.

Each view is

panel

as

for

dust.

Dust
com-

inspect

bansfer

the

onhol.

The Onan

components

i.e.,

relay. The

are

from

seen

ADJUSTMENT

Undcr-Volfogc

the

load

transfer

plant

and

back

factory.

without

NOTE: Sone contrcIs have
sifive rcIay
Do

inopetative,refum

Do
sure
drops
ate, in

A recmd
improper

Following is the

1.

2.

3.

4. Turn the

5.

6

7.

8.

q.

10.

Settings

taking the

not

attempt to

changethe setting on

not

it

requires

in

the supply

which

of line voltage readings

operation)

Provide
per

volt) of 0 to
age drop,
or larger).

Install a temporary

terminals

C
Connect the voltmeter across
Connect

wire which normally connected to

position,

Remove the
trols of
tml

adjustments.
Tum the
drapoat
tum

clockwise.
Turn the
a click is heard.

Turn

the temporary rheostat to drop

until the relay contacts

the

Turn

slowly.

is the
back to the normal source.

the

If
voltage,

VOLTAGE

0F

Rcloy:

again. This

(no

case,

an acqtrate

provide

the rheostat in

temporary rheostat

giving

the relay. Note

pickup

control to

picfup

temporary

Note

pickup

pickup

turn

Determines

switches

marked.

are

proper

precautions.

@ver

or

adjast

this relay.

it to thedealer

readjustment.

line may be causing

the

relay

rnay isolate

ad;ustment

acvoltmeter(not

l5Srange.

a

tOffFohm

jumper

(see

protective

the

16).

Fig.

high

a

reading

control to

its

control

The

rheostat to raise the voltmeter

voltage at which

voltage

not ocrur at

does

the relay

the load

caps from the

counterclockwise

SENSITIVF

relay

was

Do not

non*djustable

a

adjasdnent

or

adjustable

is

sewing

(taken

the

procedure:

wire wound

wire

series with

to

on

the factory marking

its

clockwise

slowly

relay

open.

at which

pickup

RELAY

the voltage

from

line

accurately

chn(e

m

Undetected

trouble

To

the

points

the adjustments

unttols,

the rcIay becomes

If
ONAil

relays

the

purpose.

its

times

at

in

less than

simulate

rheostat(2-watts

from the

and

L1

the

Ll

terminal.

this

its minimum resistance

the temporaryvoltneter.

two

counterclockwise

have now closed.

voltmeter reading

the

relay

the

the load

the desired simulated
control

(Oprionol)

at which

to

voltage

serwce center.

until

line voltage

relay

of

the

supply

a ljne volt-

relays

L2

terminal and

adjusdng

limit. Turn

limit,

closes.

will

rn

the

generating

set

at the

sen-

Fig.

16).

you

are

oper-

to

suspected

[ine.

100Ct-ohms

N'O

terminals.

con-

of

con-

the

the

then

1

until

reading

This

transfer

proper

the

to

'4

l4

DROP

dtrection.

nay be necessary

Turn the temporary

11.
for transfer
plant.

drop

the

Turn

12,

relay contacts

transfer

which

drop-out setting

The

pickup

the

reference

a

Scribe

13.

each

adjusting

of

accidental

the adjusting

on

caps
Disconnect

14.
wire

jumper

15.

connect
Remove
terminals.

Over-Voltoge

Joad transfer statts

the
it to the
zoltage
eEtal to
should
condition

Reloy:

load.

relays

the specified

be adjusted

and drop

PICK

UP

ADJUSTMENT

CONTROL

(Cap

Removed)

OUT

ADJUSTMENT

CONTROL

(Cap

Removed)

Repeai-

stePS

obtarn the

to

rheostat

load

-out
open.

control

from normal

This

of

is made

is adjustable

voltage.

line

screw

change

in the settings.

screws

the temporary

in

as

Step

(installed

wire

f)etermines

the

Adjust

(except

by
that a

over-voltage

pickup

to

out

when

-

Q.

and

B

desired

give

to

line

slowly

establish

will

from the

line

from 5%

to indicate

future

for

Replace

without

rheostat

j.

in Step

over-voltage

generating

following the

vgltage

condition).

the specified

at

line voltiage

the

'-,i.,n

;.

,iig)

rcx
t vrlirrvti

.r

I

)fl!,':?

fcY(rt3

..''.\

-r11

^

r!.,

r.r,)
,.^js!rNxaloi^

Several

desiitxi

the

to

clockwise

to the

final

the

ii.-

\ll

*,oli

irq . 1l

^91!

| ll

i",. il

I li

o(JT

su(rh

pickup

generating

the

until

the

generator.

to

77%

adjustment

il

ll

ll

rl

il

r.li

.

tl

I
ri

ii
ti
ll

voitage

point

'rials

polnt.

below

reference in case

protective

the

turning

and

the screws.

voitmeter. Re-

from

2)

N'O and

required before

plant and connects

procedure

source

for

is required

The relay

over-voltage

to

about

drops

/

FIG.

the

at

of

C

low

INSTALL

JUMPER

TEMPORARY

WIRE

,

tf

nonnai

175v"

TIME

Two

transfer controls,

f unction.

1.

2.

Agostol
delay
To

of telay-\ clockwise

decrease

the screw.

CAATION:

(cloc*wise).

iVhen

to

vaiue.

oi

normal.

DELAY.RELAY

types of tirne

The Agastat

from

able
either
relay uses.

The

Hagen
Delal'
to 6(fminutes.

Reloy Adiusiment:

by

controlling

change

it.

time

ac

an

HERE

-t

LINE

lro

I

T

i

TRANSFCRMER
WHFhi LiNE
;20-ri.

Plant

starttng

delay-relays

depending

Pneumatic Delay-Relay

l-second

to

on energization

Synchronous

occurs

on energization

the flow

the delay setting,

to increase

Adjustment

not force /fie

Do

?"hi.s

is

delay

power

source

requires

damages

adjusted,

of

.

PRESENT

\/OLTAGE

is attiustable

Bre used

length

on the

(Fig.

10-'minutes.

Time

or de-energization

Delay-Relay

Clock

is

adjustable

relay

enclosed

an

the slotted screw

counterclcckwise

small

a

too

of

turn

This

air

delay,

screw

and

from

onlv

ONLY
OVE R

IS

irom

with

Onan

of

delay

is

18)
delay
depending

(F'ie.

obtarns

movement of

lar to the

105%

and

adjust­can

its

cylinder.

(on

the needle'and-seat assembl;'.

lhe result

check

proper voltage.

the

by r:onnttting

'lime

load

19).

from

time

top

ight

tr:

its

be
on

2

to

tire

ADJ

USTING

SCREW

FIG. IE FlG.

l9

operation.
the

exact value.

Hogen
motor-driven
face
poi

nter
indicates
the

relay,

the

dial.

PILOT RELAY

This
at which

Two

Timc

Dcloy

time delay-relay

to

aid in

indicates

the time

simply turn the

Time

slide arm

pilot

the

or three

setting

Rcloy

the

delay

pre-set

settings may

Adiurfncnt: This

the

left

adjusting knob in the center

delay can

VARIABLE

be

RESISTOR

adjustable resistor determines

pulls

relay

builds up speed. It should not
(or

the
at 80
speed.
should

relay)

to 85% of

For

pull

replaced.

is

voltage as

example, on

in when

the

It

a

voltage

be required

(F'ig.

has a dial on its

19)

correct time delay.

time

delay; a red

in each operation.

changed with

in as the

require

was

factory

generating plant

the

240-volt

reaches

power

generating plant

adjustment unless it

adjusted

generator,

190 to

to {ind

synchronous

black

A

pointer
To set

of

on or o[t.

voltage

the

pull

to
builds
the

in

up

relay

2ff)-volts.

out
transfer,

various

the

commercial

systems.

the trouble.

Before

doing

anything, determine
A troubleshooting
typical

By checking
Operate the

plant

operates properly

load

transfer

causes

out the

generating

of

the most

control.

control component

Observing

niquo....it

running into
when
delay-relays,

relay
helps

trouble.

the line

action during operation is

determine

fails, watch

tlre

and

You

power

or

at

the

chart

common

systems,

plant
alone, the
Next,

is

fault.

at

how

instance,

For

voltage

start-stop relay.

must

decide whether

generating

exactly

end of

contml

trouble often

from its

trouble is

plant, is

whet

this section

problems.

canbe

own

conhols"

probably

determine which

important

an

far

an operation

plant

if

the

sensitive relays,

the

trouble is.

isolated.

load

gets

will not

the load

causing

gives

the

If

in

the

transfer

tech-

before

start
time

TROUBLE.SHOOTING

Troubl,:.shooting

trician

normal

during

generator,
are

all

voltajos

Hifh

and

load

transfer control,

interdependent,

AND

REPAIR

(or

repalr)

are

is

present

standby operation.

trouble-shooting

job

for a competent

a

throughout

Because the engine

commercial

BATTERY

CURRENT

BATTERY

TRANSFORMER

elec-

the control

power

and

load,

requires checking

CHARGING

ADJUSTMENT

CHARGING

optional

When
relays,

etc.) is believed

checked by

jumper

a
relay

wire.

appears defectrve,

to eliminate

equipment

elrmrnating

(time

to be

defective, they

their contacts

Example: If a time delay

short

across the

relay from the

the

BATTERY

CURRENT

RECTIFIER
FUSE

TRA

(For

Voltage

=Relays

o

NSFORMERS

CHARGING

HETER

-

circuit.

Sensltlve

Optional)

TRANSFER

delays,

from the

swlTcH

PILOT

RELAY

voltage sensitive

can often

be

circuit with

on

a stopping

contact

terminals

lVhen commercial

.i-\

(o'

TRANSFER

FIG

20

l6

INSTANT

SWTTCH

-

.

--

_=-

STA

RT-STOP

RE

LAY

TIHE

DELAY

RETRANSF

TRANSFER RELAY

RELAY

(Optional)

ER

power

returns, the

manner

check

the relay.

NOTE:

Whan if

elininated

control

(except

The start

is

without

time delay cannot b tested

linclsM

and tho tine delay

sbould then operate in

the time delay). If this

in

tha

circait,

ff,e slarf-sbp

contacts

directly.

RELAY

Except for the

REPAIR

transfer

switch

and

transfer

switch

Onan does not recommend repairing relays.

replace

cleaned

them.

with hard

tetrachloride.

TRANSFER
All

transfer

However,

U

SWITCH

switches

relays with

paper

or

gauze

contacts are

REPAIR
have

replaceable

dirty

tape soaked in

pitted,

replace

contacts

in

lf,is manner.

qntrol

If defective,

contacts

normal

e
happens,

is

rcIay

plant

lhe

pilot-relay,

be

can

carbon

the relay.

and

coils.

Tronslcr Switch

povet

source,

eliminates hum.

(eneratin(

to

the

hum

condition can occut.

held

switches

Hur: Whena

the

switch

the transfer

When

plant,

because of incorrect

disconnect micro-switch.

sealing faces
include
dirt
cerbon

shading

between

the

tetrachloride.

on ntsted sealing

At

anism may

some

titne,

require
can be caused
the

contacts closed

and

drcp

out

repeatedly.

ground

were

coils). Ercessive hum can be

magnet

Use

faces.

transfer

the

adjustment.

by a latching mechanism that

which

Imd is

connected

may

be mechanically

switch connects

the

switch is

Hum

electrically

may

occur in ncchanically-

adjustment of

minimize

To

and

contact

polished

sealing faces. Clean

mediunrfine

Remove

switch

grade

traces of

all

lineside

Transfer switch chattering

causes

mechanism

the

to the

held

hetd and

hum,

(some

caused

them

emery

emergy dust.

latching

does not

normal

which

load

the

the coil-

magnet

switches

with

paper

mech-

lock

pickup

to

a

by

CAUTION:
Iine
used)

Transler srvircJr

used
nitely.

coil

excessively

Table

MECHANICALLY HELD

llisconnect coil

l.

Remove

2.
magnet

Pull out

3.

Remove coil

4.

MECHANICALLY

l. Disconnect

Snap

2.

control rod
Slide out the stationar/ armature

3.
Remove the coil from the stationary

4.

Contacls never

the equipment.

ciently. Filing

face.

Do

not touch the

pover

is

o|f. Se/

STOP

position

to

coils

at rated voltage

magnet

If

overheats

does

and

high

or low voltages).

3.

TABLE

cap screws

as semb ly

assembly

f rom

the coil

off

contact

If

hairpln-shaped

the

and slide out

require cleaning

Dis-colored

the contact

points

lle

or

are rated

(stamped

not close

burn

could

3.

COIL REMOVAL

lead

wlres.

(4)

to

the cas

magnet

HELO

lead wires.

become

them as follows:

Remove

1.
Remove spring and

2.

3. Lift
surfaces
Take out stationary

4.
them to

plastic

hood.

contacts from

face

inward.

the

transfer switch

washer

guide post.

contacts

tl.rlnsler

Operation

Se/ector Sc/irdr

svitch

unless

disqnnect statin! batteies

according to

on

coil) should

freely

(coils

up

S}VITCH

mountlng

SWITCH

2OG'4OO

e.

assembly.

retainlng clips

the

control

and

(or

refacing)

contacts

silver

f aces destroys

badly burned

frorn

each

voltage.

(as

when

can also

remove

To

A1.IP

coll and

thc

IOO AMP

rod.

coll assembly.

armature.

for

operate

their

pitted,

or

contact

last

coils

(FIG.

(FIG.

holding

the life of

matingsur-

guide

Curved silver

by removing

olastic

screws

bodv.

notmal

(what

Coils

indefi-

dirty)

the

burn

from

see

22)

stationary

2I)

the

effi-

replace

post.

contact

holding

Transfer

or

tacts

switches
electrically

featuring

held

follows:

The

manner

contacts

mechanical latch
the contacts

anical latch

switch)

are

from
the ma-rn
transfer
coi I m ust
mechanism

The

must be adfusted

tacts reach the closed

is not
opens

contacts
electrical interlock
ated
contact

ADJUSTING

To
loosen

Adjust
lever
armature
locking
adjustment.
holes and

line

contacts

(see

Fig.22).

closed and

are

closed. While

engages

closcri.

actuates

which

opens

now closed

main

the

At

the coil

main

the

and

lcnked

coil

simultaneously. Removal

coil eliminates

switch.

be

allowing the

open the line contacts,

To

energized which disconnects the latching

linc

latching mechanism and

to open the

position.

broken,

hum may result.

the coil circuit

chatter. Each

will

before

switches

by the mechanical movements

control

rods.

MECHANICALLY HELD SWITCHES

adjust

the

the

and

is

the latching

latching

the

locking

bracket

the

contact

screws

for

fully seated

After

install new

l,/16"

operating rod

(Fig.

coil,

the adjustment

roll

mechanically

held

getterator contacts,

in

locked

The lineside

the contacts

the following

main

coil

ane closing, the

the contact control md and

the

same time,

an

arm

on

disconnect switch

coil

in

electrical

any

circuit.

place

and

noise

The line

power

is removed
power

of

(hum)

the latching

contacts

to

open.

the coil disconnect

main

tf

tf the

the

contacts are seated,

transfer switch

(see

Fig. 21) which are

of

mechanism

whichsecure

clearance between

20). On

remove

the

just

circuit

the

as

main coil

coil disconnect

has several

line

the

for

and

positive

thelatching

the latching

the main coil

when

units

with

pins

noll

is

complete,

to

pins.

line con-

operate

pulls

the

locks

the mech-

(micro-

contacts

fmm

from the

switch

con-

the

circuit
switch

the

oper-

generator

locking,

brackets.

pins

roll

make the

drill new

as

t7

To adjust
actuating
Set
the latching
ate the

ment.
Check the operation
they operate
contact
hardware for ti

the coil

arm and the adjusting screw on

the adjusting

bansfer

Adjust as required and

control rods.

disconnect switch,

scnew so

lever engages the contact operating rod.

switch several times to

pmperly

ghtness.

the micro-switch opens

seal the adjustment

of

electrical

all

according to

Check all electrical

scREfvs

align the micraswitch

the latching

check switch

switches

movements

the

connections

CONTACTS

(Cover

LOCKING

to assure that

lever.

just

adjust-

with

of

Removed)

Oper

paint.

and

(2

as

the

LATCHING

LEVER

FlG.20

CONTACT
CONTROL

7

,-

RoD ,/

/.

I()O AMP.

EL

ECTRI

INTERLOCK

swlTcH

colL

DISCONN

swtTcH

CAL

ECT

LATCHING

co

tL

-T

cotL

DlscoNNEc

swtTcH

MECHANICAI.

LATCHING

LEVER

FlG.2l

ELECTRI

I NTE

R

LOCK

:\

swtTcH

(r

\

2OG4OO

AMP.

L ATCHI

HECHANISM

NG

/tV;
\.lz

K

NOTE:

sli[htly dillerent

the

F

rG. 22

r8

r"UV.r

The

200

sane operatin{

and

&O-anp

appeain( latchin( mechanism,

procedure

transler srvitcies have

and adjushnents

but havo

a

la,i

:.J

TROUBTE-SHOOTING

CHART

TROUELE

plant

fails,

Powet
start.

Plant

starts under

power

ent

No delay on

Plant does not react

low voltage.

failure.

noeppar-

shrting.

does

to

low

not

POSSIBLE CAUSE

time

t.

included,
that normal delay

Defective

2.

starting
Generating

3.

tive.
Start-stoo relav

4.
or

Equipped with

1.

sensitive
delay on
mentary voltage
will cause a control

equipped to

Defecti ve volta

2.

tive relays.
Defectjve start-stop

3.

relay.

Defective

1.

starting relay.

Defective

1.

sitive relays.
Voltage

2.

requires

delay on

If

occurred.

dirty

contacts.

check

time

delay

rclay.

plant

stickinp

relays

starting.

start.

ge

time

delav on

voltage

sensitive relay
adjustment.

starti
to see

has Does

on

defec-

voltage

but no

Mo

dips

so

se ns i-

sen-

TROUBLE

not

Will

exercise

No
normal operation.

No
generator

exercise.

not

power

power

stop at

period.

to

to

start.

load

end of

during

load after

POS5IELE CAUSE

Defective

l.

Exerciser

l.

period.
Power failure

2.

exercise

Dirty

l.

on

bansfer

Defective transfer

2.

switch

Transfer switches elec-

3.

trical

switches

4.

Instant
defective.

time

1.

If

pickup
to

see

has

No
build-up
erator

3.

Defective

switch

Defective

4.

ism on
line

exerciser.

fails

period.

pitted

or

interlocking

included, check

that normal delay

occurred.

generator

output voltage.

pilot

hansfer

side

contacts

switch.

ide

line s

def ective.

transfer relav

delay

on load

low

or

transfer

relay.

latch

mechan-

switch

not unlatching.

during

during

coil.

voltage

gen-

-

Plant

does not

power

returns

to supply

delay on

No

continues

Plant
transfering
oommerciel

strrp when

-

conUnues

power

stopping.

to

load

power.

to load.

run aftet

back to

time

If

ping
see

has

Time

2.

relay
Defective voltage

3.

sitive relay
pickup).

Defective time

1.
stopping

If

l.

ping
included,
mal
Defective
stopping
Defective

3.

lay

Short in

4.

hansfr-,r contml

delay on
included,
that normal

occurred.

lay on retransfer

de

defective.

relay.

time

delay

(after

delay has passed.

relay.

(will

not
plant

check

(will

delay on

on

hansfer)

be

sure

tine

delarv

tart-stop

s

energize').

to load
wires.

stop-

to

Line sideof transfer

delav

does notpickup

ret

urn s.

sen-

not

st,rp

is

nor-

on

Transfer
wh,:n

re-

line

switch

power

when

chatters

returns.

switch

power

time

If

l.

fer is inc:luded,

normal dr:lay
passed.
Defective
switch coil.

Defective

3.

fer relay
Transfer

4.

anical

or

tive
tacts not completely
dropped out

Iilectrical

switches defective.

Transfer

I.

latching
position
Troubleshooting
Rrpair
anically

on

delay

periotl

transfer

instant

switch mech-

interlock

generator

interlock

switch not

into

-

adjust.

Section)

Held Only

retrans­be

sure

has

trans-

defec-

con-

closed

(See

and

Mech-

No

battery

TROUBLE

charging cunent.

POSSIBLE

Defective
Measure resistance
each

and backward.

ance in
should

the

Defective

2.

(open
Defective

3.

Transformer

4.

cuit).

).

Fuse burned out.

CAUSE

rectifiers.

rectifier forward

one

be high,

other

direction.

milliammeter

circuit).

resistors.

Resist-

direction

low in

(open

cir

Load transfer conhol

of

TROUE

L E

hums.

POSSIBLE

During
ation
causing vibration.
TroubleShmting
Repair Section).
Duing

2.

is on
cut-off
adjusted
anism.
Shmting
Section).
Held

generator

-

dirty

tilne when

-

defective

switch or

latching

(See

Only.

CAUSE

oper-

pole pieces

(See

and

line
coil

poorly

mectr

Trouble-

and Repair

Mechanically

l
t

PARTS

INFORMATION

This control is custom
circuits end conponents

the variotions of circuits and
control contain I

For servico

plato

ol

Obtarn
on

part

your

identrfication

parts

Order
unable tU identify the
address
reason

for returning it.

Please

parts.

All shiprcnts are
good

against the transportation company making the delivery.

do

order when delivered to the t.anspo.tation company.

ot

your

cwrttol.

numbers

order

the

plate,

by

plainly

not order

patts,

enginee.ed

to

listing and localioo of

cootacl

€nd description of

Model

and

State

part

nurnbers with complete description as listed in tlre

part

on

packaBe.

the

pa(ts

in s letter id which

complete unless the

6nd

perform

transf€t

the automatic

components,

lho

deulct

the Serial

switch

required,

Regardless

specially co.structed.

(unctions

a

parts

lrcn

rclair

all

of

No.

part

telurn lhe old

psckinB

list is not

Parts
(excluding

you

vhon

parts

the control for whrch

numbe.,

o{

any

other

some

list iodicates

Optional equipment

of this codtrol. Eecsuse

printed

hardware and

putchase<l

fiom the

shown on wiring

part

previous

your

to

subject

itens are

Any

in

this manual.

transfer

this oquipnent

Uiring

Diagram

parts

are required. Obtain

diagarn. State the

nearest authotized seryics slalion.

cor.espondence,

is

treated. State

back-ordered.

claim for

and special req iremenb

of the indi\:iduelity

The

wirrng

parts).

swrtch

or relor to lho conryny

furnished with

diagram, when orde.ring

write a

or damage in

loss

letter describing

definrte

Shipments 8te

the control.

these numbas

trensfer

quantity

shipping instructiqrs

transit should

demand

ofeach contlol ond

dragrans

supplred

lisled on lhs nane-

switch componenls.

of

each

Prini

the

poperly pacled

be

particular

sure

Be

drrectly

part

desired.

yout

name and

part

and stating

when

filed

with

this

to slaie

fiom the

lf

ordering

and

in

promptly

Always
requesting

WRITE IN NUMBERS

give

these

numbers when ordering

service information.

KEEP

REFER

TO

WIRING

S HOWN ON

CONTROL

repair

p:vts

CONTROL NAMEPLATE

WIRINGDIAGRAM WITH THIS

DIAGRAM

FOR LISTING AND

2l

or

LOCATION O F

MANUAL.

PARTS.

W:

I.

=:*

Ei-:

F:L'

,

.),

i:r:

it;

&

4,;

*-"

These instructions epply
breaker

fer
LTC 2000

through

The
cabinets, or
motor

matic circuit breakers. The

control
and other optional equipment which are
the applicable

DESCRIPTION

The motor-operated

and one on

open

devices outside

performs

circuit

operating

The motor

single speed
a centrifugal

just

attachment,
duction

hardened

and
The motor,

containing

life of

cal
It
variations between or in these

attachment
clutch which either connects
cally to the breaker
rod when the

ampere seties,.the
breaker handle and
the operating rod mechanically

or

pulled

rod is also the mechanical link

the

The
operates on

--r

The limit
the

sponding

is a
one

transfer switches

controls:

th'rough

Spec

load transfer

operated

components such

generator

or close.

its

breaker

rod

operated

mentioned,

is

made between

steel worm

a bronze

sufficient

the

apparatus. The

link

between

ptovided

is

is

disconnects the operating tod

out.

handle attachment.

motor is

switch

breaker

contact

rotary

type

for opening.

800',LTC

LTC

(Manual

C

controls

cubicles.

transfet switch mechanism

Instruction Manual.

(S00

Each

the breaker

function by means of a

handle with

handle attachment.

and

reduction

brake, a housing for mounting the

Etr operating

and

an

worm

gear

and

the

with

fastened

emergency handle is

handle attachment is

the

On

of

a.c.

opens

closes or opens in response to

in

with two

to the motor operated circuit

for the following

(Manual

B

Spec

#972-L).

are

larger

The

as relays, battery charger,

Arnp

1200

A
circuit

one is controlled by

emergency handle. The speed re-

a

handle, or disconnects

has a clutch

1200

the

breakers, one on line
are

side,

and

the

mechanism consists

means, a crank, a

the motor and the crank by a

coupled

gear

worm have

lubricant

crank
compression spring

the

directly

coupled to the crank shaft.

operating rod

and

to the breaker

the operating rod

ampere series,

series commutator type and

the motor circuit as soon

control

segments, one for closing ancl

SUPPLEI'IE}ITA

load

1200 through

housed

cabinet contains the

small

Series)

electrically

motor mechanism,

of worm

aid

arm,

packed

to last

handle

the
two

inserted.

which either connects

to the breaker

when the handle is

between

circuit. This

Spec C and

#959-3); LTD

in

two separate

and rofl-outo-

cabinet contains

all

covered

operated

contact-making

moving

motor

gear,

of a motor,

limit switch,

a

breaker handle

to

motor shaft

the

bearings

ball

thtoughout the

mechani-

the

is

attachment.

to absorb

parts.

The handle

handle and

mechani-

operating

the

On

fastened to

the operating

crank

the

9(Xl-

129

trans-

800

in

side

to

and

the

crank,

parts

any

has

the

800

the

handle

and

as

a corre-

switch

(Revised

7-69)

RY IITSTRUCTI

The

centrif ugal

against a brake
speed of the motor and
mechanism.

lrnportont:

justed

dismantle or chan(e the rclative
parfs,
the lite

Lugs
modate
connecting
to
lugs on

wires. Four

ed with the

0perotion
Designed for intermittent operation,
operating motor has the same
closing and opening and should
mote than
immediately following
operations is not limited if

nd

After
motor
cut-off
and closes

This
trol contact is

|tANUAt

a

Tum the single-pole

switch

model doesntt
jumper

knurled
from the

To change back
breakers
close the

ITANUAL
Turn

switch to
model doesn't

jumper
gency
the
roller
the motor

at

since

of

on

the neutral bar

two

600 MCM

the neutral bar

greater

the control

is

switch

opens

to the

between

handle to

breaker

to their original

the

between

handle

handle

out

S

brake, consisting

band

Ifris motoropetated

lactory

the

this

may

the appatatus.

3/0 to

(cre per pole)

lugs

size

wires.

to

300

other

10

than

started and rotates

a contact to rotate

0PERATI0N

disconnect switch

0PERATION

single-pole

the open

can

of a notch

crank

500 MCM

lugs

complete closing

four per

contacts close,

then

opens

the circuit breaker

mad6.

open

have a

terminals

disconnect

handle.

to automatic operation,

have a

terminals

into

the end of

no

longer be

and

the

by

prevents

tot

a|Iect

for

MCM

500

The

for

three

(one

per pole).

one

minute.

the

(800

toggle switch

off

or

toggle switch,

6

positions,

(1200

toggle

or off

in the

position.

toggle

6

lever which

will disconnect

of two

motor shaft,

overtravel of

breaker

prcper

position

the opetation

the

800

size

accommodate two

1200

300

size

wires can

direction

not

and opening

another. The number of

rate

the

the

the crank

circuit to stop

crank

the

when the opening

Anp)

position.

and

8.

the motor

connect

or

Arnp)

switch by the transfer

switch, disconnect

and

8.

the operating

turned.

weights

limits

the motor

been

has

'opetation.

series will

wires.

ampere series

to

500 MCM

the

of rotation for

be

of operation is

circuit breaker

180

by

If the

disBonneot

Then

latch

the

If

Screw the

This will

is operated

the

Do

any of the

oI

and

tedace

accom-

The

be

connect-

high

put

through

operations

o.

A motor

the

another

the transfer

particular'

pull

out the

mechanism

return

handles

jumper.

the

particular

lever

operating

torque

motor
180

emer-

until

lift a

spun

the

a&
not

other

3/0

have

size

o.

con-

the

the

and

the

by

-i

il

I

I

t
{

I

:l

's

,,

:

,i

.i

,t

s

4

*

3

$

yl

,.r- ..

'.c

levet from

operated

be
handle.

itq

change back

"

ers. to original

gency

connect the

l*ointenonce

Lr*-'YGrwvft

cruflolr

I

Lfffr^l.*.e'.f

it

If

,inspection

Remove

.

'and

flat
ating

"circuit

lorder.

the crank. This

r.

tions of

two

.Sandle

'

from
The

,

operatio:r before
This may

,

plste

l,olot*

-

.:

DESCnIPTION

'

The

'

-,remotely

,*",dn6'-ttOFFtt

:

p6ssible

'

:oierator

the notor mechanism. The

handle and

jumper.

is necessary

of the cilcuit breaker,

the

t/2

mounting

sciews that

head

handle

breaker cover

Check

the

crank, If

inch flat head

t/4

assembly

the crank as
.motot

.filotor

shorrld

beldone

at'the

in the direction

shaft

operator

control
to

mechanism.

by

:Benually

for automatic operationr,

positions,

close

Betorc

I

discowtect

to remove

nuts,

inch

plate

as a unit. Remove

assembly

temdved.

gap

the

eid of

between the handle assembly

should

the

and move the

required. Then

be rctated maaually

electrical op-eration

by removing the

the motor

(2000

mechanism

and

positions.'

manually

neens

unscrew,

the

peilotain(

pull

go

through

cen

now be

be

1/8

gap

sctews that

shown by

i

Arnp)

operate

times

In

operate

disconnect

all eler,tdcal

the

off

Assemble

of an

is not

assembly torard

housing

is

a
the breaker

breaker can then

of

remove thb

the

return

the

energency

switch or

tol.lovinfi,

povet!

motor mechanism

proceed

the

the handle.

correct,

retiglrten the

a device;designed

breaker to its

of

as follows:
motor mechanism
the two

pulled

inch at

pass

spring clip

and rotating the

the artow.

neceSsityr

l/4

Theoper-

off and

reverse

in

the

all

loosen

throug[r the

ornway

screws.

to

check

is

attempted.

ttuough

break-

emet-

for

mch

the

and

posi-

the

the

and

rrONtt

.lt,is

the

llonuol 0pcrcticn
or off

lnsert
handle

gperator
circuit

handle
to return to autooatic operation.

position.

switch,

the

and open or

Operating

to the

positior.

E:

N0T

rnmaally,
tteme

atra

ihe
pletely

disconnect the

pctable

adtlrates

33OFF '

oI

ltoa one

-

If the

breaker

the

the limit switch.

notor

Ctose

When

move

the

the toggtre switch to the open

Turn

particular

jumper

handle

the breaker

close

manually throrgh the motor

stays in step with the,breakerts;,.

the

thtowin( the

Dreaterts handle to the

the

positioa
linit

svitcft

position

on terqninds

into the breakerts

switch or

in

otdet
is

to

the

doesn't

ftodcl

t3ONtt

Thus

the

coruiqet the

:1

breaker

to insure that

toSgled ovet cofr-

next.

have

6

extension

or

"OFFtt.

ele.ctrical',

tcgitptt

and

8.'

jumper

e.x-'

e

a.\+/ffi'r''

.

:

i

.

:

CABINETS

Table

Use

1

CABINET

t-l-T

| |

a reierence

as

"A

e!t"

Cabinet

for

CABINET

ttl

|'.-ao,.-1

l-@l
l0 l
l'l

to

I

t6"

_1

E

EI

"Bt'

"B''

below.

I

_l

\--r'.

,1

.i

'i

:it-

r'I

. -Sr

,.j

"t1

I

i

i

i

',;

In

operating the

.

motorts

,

less than one-half

i

'i

means

by limit

,

out)

''

brackets

', "maXirnum

.

, arm action

,

.*Iandle

adjusted.
Eotor

Tbe.lugs
:{ilCM

be'accoqpsdated

f

;.'O'PERATION

i;Tbe'srotor
flpafeifruty

output sheft, which

two

of

switches;,,llflotor

governed

is

and

tcque at

is immediate.

arm travbl

Tests

operation

on the neutral br

wires.

size

i,

operator is

cytle,

fiiie

.farjoutlast

b-teaker

separate

by

a

toggle

are,tun

Four 300

by the

{2000

i.e.,

per

the circuit

stONtt

revolution.

windings

means

linit

initial starti*g.

and dtive

or

reversing, moves

is

The

control

drive

of

swltch'

cam brackets

breaker

on a

cgt'rfake

to

500

other

Arp}

an intermittent

rlgpF"

minute,

At

breaker.

f'OFFrt,

motor

which

(energization

lugs

are controlled

cam adjusting the

motor

Each

Thus

to

four

MCil ei?g'*ires

Wasipct:pole).

duty

to

"oN"

geared-

th€

through

reverses by

and cut'

provides

handle

the

factory

are

300

proPet

to 500

insure

device,

aiain, shotrld

this rate the operator

can

TAB

L

l.tODE

&

LTC

1200.

A

LTC

2000'. 25"

LTC

-

|

Tllese aodels

**.-'f1es

8OO' ,7Vz" 36?' lg" 60"

LTD

standin$

A

t8" 36" lg"

ar.e-sall

nodtis

I

L:E

OIH EN SI ON

B c D

54"

moanted. ,
only.

':'.'

'.'

.

22V2"

66'?
90t''

51

.-

,

r'I

j