Watlow QPAC User Manual download pdf (Page 12)

12 QPAC User's Guide Chapter 2: Install & Wire

QPAC-01 Output Wiring

for 150 to 1,000A Units.

∫

WARNING: Shock Hazard

Heatsinks are electrically

Live.

ç

CAUTION:

Check terminals for

tightness before ap-

plying power and then

recheck terminals after

one day of operation.

Loose connections can

damage the SCR.

NOTE:

A circuit breaker is re-

quired in addition to the

semiconductor fuses.

All semiconductor fuses

are mounted on board

the QPAC models 400 to

1,000. Where third-leg

fusing is selected, addi-

tional space is required.

NOTE:

QPAC models Q01, Q32

and Q33 up to 300A and

575V

Å (ac) are agency

listed. QPAC models Q01

and Q32 up to 1,000A

and 480V

Å (ac) are

agency listed. Q33 400

to 1,000A are not agency

listed.

∫

WARNING:

To avoid damage to

property and equipment,

and/or injury or loss of

life, use National Electric

Code (NEC) standard

wiring practices to install

and operate the QPAC.

Failure to do so could

result in damage and/or

injury or death.

Output Wiring

*1 NOTE: On 120VÅ

(ac) or 277V

Å (ac), L2 is

neutral and cannot be

broken.

*2 NOTE: A contactor is

required if a high limit

control is used.

*3 NOTE: A separate

disconnect is required

for the fan(s) if used.

*4 NOTE: Use 14- to 16-

gauge wire for control

power only.

Circuit

Breakers

or

Disconnects

Contactors

If Required

On-board,

factory

installed

semicon-

ductor

fuses

Heater

Load

L1

L2

Fan 120VÅ (ac)/20W

L2

L1

T1

*1

*2

*3

*4

1A Fuse

L1

L2

G

Circuit

Breakers

or

Disconnects

Contactors

If Required

On-board

factory-

installed

semi-

conductor

fuses

Heater

Load

Fan 120VÅ (ac)/20W

L1

L2

L2

L1

L1

T1

L2

L3

T3

L3

1A

fuse

*2

*3

*4

G

QPAC-32 Output Wiring

for 150 to 1,000A Units.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 33 34

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