THOMSON TS 850 Service-Handbuch

TS 850

AUTOMATIC TRANSFER SWITCHES

INSTALLATION, OPERATING &

SERVICE MANUAL

PM042

Rev 7 01/10/17

9087A

-198

Street, Langley,

Canada V1M 381 • Telephone (604) 888-0110

Telefax (604) 888-3381 • E-Mail: info@thomsontechnology.com • www.thomsontechnology.com

850 TRANSFER SWITCH

TABLE OF CONTENTS

PRODUCT REVISION HISTORY 1

CAUTION! 1

NOTESTOINSTALLER

GENERAL DESCRIPTION 3

GENERAL THEORY

OPERATION 4

TYPE A AND TYPE B DEFINITIONS 8

GENERAL NOTES

SERVICING MECHANISM 8

STYLE

"T"

TRANSFER SWITCH MECHANISM- 400 -1200 AMP 9

STYLE

"M"

TRANSFER SWITCH MECHANISM -MAXIMUM 250 AMP 10

10. RECOMMENDED MAINTENANCE (STYLE

"T"

& STYLE

"M"

MECHANISMS)

11. FRONT VIEW (TYPICAL) 3

4 POLE STYLE

"T"

TRANSFER MECHANISM 13

12. STYLE

"T"

CONFIGURATION OPTIONS 14

13. FRONT VIEW (TYPICAL)

3/4

POLE STYLE

"M"-

100/150/250A 15

14. FRONT VIEW (TYPICAL) 3 POLE STYLE

"M"-

200A 16

15. TROUBLESHOOTING (SEE CAUTION!

PAGE #1) 17

16. CABLE TERMINAL INFORMATION 18

17. REQUIREMENTS FOR UPSTREAM CIRCUIT PROTECTIVE DEVICES 19

18. GROUND FAULT SITE TEST REQUIREMENTS

19. NOTES

20. PERFORMANCE TESTS

PM042 Rev

01/10/17

Thomson Technology Inc.

850 TRANSFER SWITCH

PRODUCT REVISION HISTORY

NOTE:

The

following

information

provides an historical

summary

changes

made

this

product

since

the

original release.

Operating

Seniice

Manual Version

Rev 7 01/10/17 Withstand rating change for 1

OOA

150A.

Rev 6 01/07/20

NewTS

850-TS7-1000/1200

model introduced; ground fault test

requirements; performance tests.

Rev 5 00/12/01 New

850-TCK-600 model introduced; cable terminal

information; DSS option Lev-3 information available

PM043.

Rev 4 00/08/31 Service entrance information for all models.

Rev 3 00/02/25 Warnings added with reference to multi-tap controller capability

features and system voltage; added manual operation instructions.

Rev 2 00/01/21 Added 200A model information c/w drawings.

Rev 1 98/01/21 Separated TSC800 controller information into new manual PM049.

Rev 0 96/08/28 Original release.

Contact

Thomson

Technology

Inc., to obtain

applicable

instruction

manuals

or if

doubt about any matter relating to installation, operation or maintenance.

Soft

copy

the

most

current

version is available

www.thomsontechnology.com.

All information contained

this manual is

for

reference

only

and is

subject to

change

without

notice.

CAUTION!

Before opening the transfer switch enclosure to perform any service task, or to manually transfer the

mechanism, it

imperative to isolate the transfer switch from any possible source of power. Failure

to do so may result

serious personal injury or death due to electrical shock.

Service procedures must

undertaken by qualified personnel only!

NOTES

INSTALLER

To ensure satisfactory installation

this equipment

sure to observe "Recommended Connection

Tightness" and "Requirements for Upstream Circuit Protective Devices" located

this manual.

PM042

Rev

01110117

Thomson

Technology

Inc.

850 TRANSFER SWITCH

All mechanical and electrical connections must

checked for tightness prior to placing this

equipment

service to ensure proper operation and to validate applicable warranty coverage.

If the transfer switch has programmable multi-tap voltage capability (refer to electrical schematic),

confirm the transfer switch has been·configured for the system voltage prior to installation.

.·Warning

Failure ·to confirm and match transfer switch

voltage

with

the system voltage . could cause

serious equip,;,eni

age; .

The voltage selections and connections are shown

the electrical schematics attached to each

transfer switch. The factory default settings will

indicated

the calibration label attached on the

inside of the enclosure door (supplied loose

open style models). A blank label

included to

record the applicable settings if the configuration is changed from the factory default settings.

To change the transfer switch configuration the following must

accomplished:

• Change voltage taps

PT's to system voltage (refer to schematics)

• Change TSC 800 programming (refer to sections 6.2.

6.2.4, 6.2.5,6.3, and 6.4

the TSC

800 instruction manual). The following settings may require reprogramming (depending

options purchased):

System voltage

System frequency

System phase

Utility undervoltage pickup (typically 90% of system voltage)

Utility undervoltage dropout (typically 80%

system voltage)

Utility overvoltage pickup (typically 110% of system voltage)

Utility overvoltage dropout (typically 105%

system voltage)

Utility underfrequency (typically 95% of system frequency)

Utility overfrequency (typically 105% of system frequency)

Generator undervoltage pickup (typically 90% of system voltage)

Generator undervoltage dropout (typically 80% of system voltage)

Generator overvoltage pickup (typically110% of system voltage)

Generator overvoltage dropout (typically 105% of system voltage)

PM042 Rev·7

01/10117

Thomson

Technology

Inc.

850 TRANSFER SWITCH

Generator underfrequency (typically

95%

of system frequency)

Generator overfrequency (typically 105% of system frequency)

Record any changed setting

the TSC

800

Programming Data Sheets for future reference.

Complete the blank calibration label

and

attach to the inside ofthe transfer switch enclosure door.

INSTALLATION

OPEN TYPE TRANSFER SWITCHES -

Please refer to the factory for

additional information.

GENERAL DESCRIPTION

(See CAUTION! on Page #1)

The automatic transfer switch employs two moulded-case switching devices which may

be:

non-automatic circuit interrupters ("type

transfer switch)

automatic circuit interrupters with integral trip units; ("type

transfer switch)

this manual, the switching devices will

referred to

"breakers". The breakers are operated

by a mechanism driven with

electric motor. The transfer switch provides automatic transfer of

electrical load to a standby power supply

the event of drop or loss of voltage of any or

all

phases

of the primary power supply. Upon restoration of the primary supply, the electrical load

automatically retransfered to the primary power supply (after

adjustable time delay). All

necessary control components for automatic transferring are located

the control compartment

and

the enclosure door.

The transfer motor utilizes the power from the source to which the electrical load

being

transferred. The mechanism provides a positive mechanical interlock to prevent both breakers from

being closed at the same time. The mechanism

also designed to leave both breakers "trip free"

the closed position, permitting incorporation of overload and/or short-circuit protection

either or

both breakers ("type 8"). After tripping, the breaker of a "type

transfer switch must

manually

reset.

Note: For the purpose of this manual, the term UTILITY indicates the primary power,

and

the term

GENERATOR indicates the standby power.

PM042

Revt

01110/17

Thomson

Technology

Inc

850 TRANSFER SWITCH

GENERAL THEORY OF OPERATION

5.1. STANDARD AUTOMATIC TRANSFER SWITCH

5.1.1.

NORMAL OPERATION

When utility supply voltage drops below a preset nominal value (adjustable from

70%

to 1

00%

of nominal)

any phase,

engine start delay circuit will

initiated

and

the transfer to utility supply signal

will

removed (i.e. contact opening). Following

expiry of the engine start delay period (adjustable from 0 to

sec.)

engine start

signal (contact closure) will

given.

Once the engine starts, the transfer switch controller will monitor the generator

voltage and frequency levels. Once the generator voltage

and

frequency rises above

preset values (adjustable from

70%

100%

of nominal), the engine warmup timer

will

initiated. Once the warmup timer expires (adjustable from 0 to

sec.

the

Transfer to Generator Supply signal (contact closure) will

given to the transfer

switch mechanism. The load will then transfer from the utility supply to the generator

supply

via

the motor driven mechanism. Note:

optional neutral delay timer circuit

will delay the transfer sequence

the neutral position (i.e. both breakers open) until

the selected time expires (adjustable from 0 to

sec.).

The generator will continue to supply the load until the utility supply has returned.

The retransfer sequence

completed

follows: when the utility supply voltage

restored to above the preset values (adjustable from

70%

to 100% of nominal)

all

phases, a transfer return delay circuit

will

initiated. Following expiry of the

Transfer Return Timer (adjustable from 0 to

min.), the Transfer to Generator

Supply signal will

removed (contact opening), then the Transfer to Utility Supply

signal (contact closure)

will

given to the transfer switch mechanism. The load will

then retransfer the load from the generator supply back to the utility supply. Note:

optional neutral delay timer circuit will delay the transfer sequence

the neutral

position (i.e. both breakers open) until the selected time expires (adjustable from 0 to

sec.).

engine cooldown timer circuit will

initiated once the load

transferred from the

generator supply. Following expiry of the cooldown delay period (adjustable from 0

min.), the engine start signal will

removed (contact opening) to initiate

stopping of the generator set.

PM042

Rev!

01110!17

Thomson

Technology

Inc

. ·

850 TRANSFER SWITCH .

5.2. SERVICE ENTRANCE AUTOMATIC TRANSFER SWITCH

(Note: This applies only to service entrance transfer switches supplied with a

Padlockable Disconnect Switch. Contact TTl for other types.)

5.2.1. NORMAL OPERATION

·Underc

norma1

conditions, the load

energiz~d

from the utility supply through the

closed utility transfer breaker. If the utility power fails, the generator will start and the

load will

re-energized

via

the closed generator transfer breaker.

the normal operating mode, the Service Disconnect switch shall

the

"energized" position.

5.2.2. SERVICE DISCONNECT PROCEDURE

To perform a service disconnect (i.e. to disconnect the utility and generator supplies),

the following procedure

required:

1. Move the "Service Disconnect" control switch located

the door of the transfer

switch to the "Disconnected" position.

Verify that the "Service Disconnected" pilot light

illuminated.

the Light is

illuminated, the service has been successfully disconnected

and

it is safe to perform

any

maintenance procedures as required.

this condition, the transfer switch

the neutral position, with both utility and transfer breakers open. The transfer switch

will remain

this condition, regardless of condition of the utility and generator

supplies (i.e. if the utility power fails, the generator will not receive a start condition,

nor will the transfer switch move to the generator position).

the Light is

not

illuminated, further procedures are required (refer to the following procedure #4).

3. Attach safety lockout padlock to the "Service Disconnect" control switch to prevent

unauthorized change

operating condition and verify transfer switch door

locked

closed. Ifthe door

not locked, turn and remove door key.

If the "Service Disconnected" pilot light

not illuminated, the service will not have

been successfully disconnected and

therefore not safe to perform any

maintenance until the following additional procedures are performed:

Warning ,

rj£irspnp~l

~:;,

,-nus(

,::,·

un~~ii~k.~

·-

PM042

Rev

7 01/1.

0/17

,_.

_____

,·.

TfJomson

Technology

Inc.

850

TRANSFER

SWITCH

• Open the door to the transfer switch using a suitable tool

and

opening the door

lock with the key.

• Visually inspect the actual position of the transfer switch mechanism.

the

position

the transfer switch mechanism is clearlv in the "neutral position", the

service has been successfully disconnected.

Notes:

If the position of the transfer switch mechanism

clearly

the "neutral

position, the "service disconnected" pilot light may not have illuminated

due to the following reasons:

Utility

and

generator supply voltages are not present (the pilot light

requires

supply voltage to

present).

The pilot light may

burnt out. The bulb should

immediately

replaced with a suitably rated bulb.

Failure of one or more of the sensing/logic contacts. A qualified

service technician

required to trouble shoot this specific condition.

Unplug the control circuit isolation plug to de-energize all

power to

the control circuits. Note: The

power conductors will still remain

energized. Once the control circuit isolation plug

removed the

"Service Disconnected" pilot light will not illuminate due to loss of

control power.

Note:

to return the transfer switch back to normal operation, the

control circuit isolation plug must

reconnected for correct

operation.

• The transfer switch door should then

securely closed using a suitable tool and

locked

the closed position

with

the

key.

Once the transfer switch door has

been positively locked closed

and

secured and only then

is,

safe to perform

any maintenance procedures

required.

•

the position

the transfer switch mechanism is

not

in the "neutral position"

further procedures are required (refer to the following procedure)

PM042 Rev

01/10/17

Warni11g

Failure to ·positively lock -closed .

and

secure .

the

transfef

switch

door

may

· result in serious

per

sonal

njury

death due to electrical_

shock.

. 6

Thomson

Technology

Inc

850

TRANSFER

SWITCH

• If the position of the transfer switch mechanism

not

the "neutral position" the

transfer switch mechanism must

manually operated

follows.

operate

manually, pull the manual release plunger

the mechanism, releasing the motor

drive

rod

from motor drive

arm

and

move the knob

and

yoke to the marked

"Neutral" position.

_Warning

··

Failure

move

-':-:

The transfer switch door should then

securely closed using a suitable tool and

locked

the closed position

with

the

key.

Once the Transfer switch door has been

positively locked closed

and

secured

and

only then

is,

safe to perform any

maintenance procedures

required.

Warning .

Failure.to positively

lock

clqsed ana

secure

the ·

.·,·-

·.-·

transfer. switqh door

miw

result .

serious

personal injurv

death

due

.electrical

shock.

To re-energize the load, the padlock(s) should

removed from the "Service

Disconnect" control switch,

and

move the switch

the "Energized" position. The

transfer switch will immediately return

the utility or generator supply if within normal

operating limits.

5.3. TEST CONDITION

The transfer switch may

tested utilizing the TSC 800 controller push-buttons or

optional four position test switch. A simulated utility power failure condition will

activated when the test mode

selected. The transfer switch will operate

per a

normal utility power fail condition. Note the test mode

operator selectable for "On-

Load" or "Off-Load" testing scenarios.

The transfer switch will remain

generator supply until the test mode

terminated.

will then immediately transfer back

the utility supply and then continue to operate

the generator set for

its

cooldown period then stop. Note: the transfer switch will

automatically return to the utility supply (if within nominal limits) if the generator set

fails while

the test mode.

. PM042 ·

Rev7

01/10117 1'

,·

Thomson

Technology Inc.

TS 850 TRANSFER SWITCH

TYPE A AND TYPE B DEFINITIONS

"Type

transfer switch means

automatic transfer switch that does not employ integral

overcurrent devices.

"Type

transfer switch means:

-an

automatic·transfer switch that does employ integral overcurrent

protection

at least one of its two breakers.

"Type

transfer switches are not equipped with trip units,

and

require properly coordinated

upstream protection. Information

closing

and

withstand ratings,

and

recommendations for

maximum upstream protective devices for "type

units are

this manual. (Note: Some "Type

models employ "high-magnetic" trips

the breakers, however these are set to trip at a higher than

normal current for that amperage circuit, therefore the possibility of tripping

very remote. Since

these trips are not intended to provide overcurrent protection, but are rather employed

ensure the

integrity of the transfer switch under

all

circumstances, they are still classed

"Type A").

"Type

transfer switches are typically equipped with standard thermal-magnetic trips which will

provide the required overload and short circuit protection. "Type

can

also

built using solid

state trip breakers, which

can

include ground fault tripping

well

overload and short circuit

protection.

should

noted that a "Type

transfer switch with overcurrent protection

only one breaker will

require the same consideration for upstream protection

the feeder of the breaker with

trip

(as

applies to a "Type

transfer switch).

GENERAL NOTES

SERVICING MECHANISM

(See CAUTION!

Page #1)

When performing any service work

the transfer mechanism,

imperative that the following

observed:

7.1. To maintain mechanical integrity, ensure that:

• All limit switches linkages are correctly adjusted to provide full travel of the

breaker toggles

without

exerting unnecessary forces associated with excessive

travel. Ensure that breakers travel far enough to reset any internal trip unit (it

more important for the toggle to go fully

the "off' direction, than

the "on"

direction).

• Mechanical interlocking

correct one breaker must

well open before the other

should close.

PM042

Rev 7

01110117

mson

Technology

Inc. ·

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