Watlow Power Series Rev H - Manual (Page 18)

3.6 I Watlow Power Series Wiring, Chapter 3
Wiring Example
Figure 3.6 - System wiring example.
Recommended fusing options to meet 200KA SCCR. All other untested combinations are
defaulted to 5KA per UL508A and NEC guidelines.
CRI: High
Limit
Contactor
Three-phase
Resistive Heater
4 to 20mA
Gnd
On-board
Semiconductor
Fuses
3Ø, 2-leg
Zero Cross Fired
Power Series
Retransmit to Monitor
Output Operation
Control Power
2 1 3
4 5 6
CRI
Coil
L3
L2
L1
480V~
(ac)
480V~ (ac)
120V~ (ac)
Breaker
AC Common AC High
Control
Thermocouple
High Limit
Thermocouple
PM6C2FA-ALAJAAA
–
+
+
–
F1
G1
H1
T1
S1
R1
L4
K4
T2
S2
R2
98
99
CC
CA
CB
B5
D6
D5
ç∫
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 Power
Series. Failure to do so
could result in damage,
and/or injury or death.
ç
WARNING:
Install high or low
temperature limit control
protection in systems
where an over
temperature fault
condition could present a
fire hazard or other
hazard. Failure to install
temperature limit control
protection where a
potential hazard exists
could result in damage to
equipment, property and
injury to personnel.
NOTE: Our wiring
example illustrates
circuit breakers for
branch circuit protection.
Fuses can also be used.
Power Series Model Fuse Rating Watlow Fuse P/N Bussmann Fuse P/N
PC1X-N20 160 0808-0102-0160 170M1319
PC1X-N25 200 0808-0102-0200 170M1320
PC1X-N30 250 0808-0102-0250 170M1321
PC1X-F20 160 0808-0102-0160 170M1319
PC1X-F25 250 0808-0102-0250 170M1321
PC1X-F30 315 0808-0102-0315 170M1322
PC2(8)X-N20 125 0808-0102-0125 170M1318
PC2(8)X-N25 160 0808-0102-0160 170M1319
PC2(8)X-N30 160 0808-0102-0160 170M1319
PC2(8)X-F20 160 0808-0102-0160 170M1319
PC2(8)X-F25 250 0808-0102-0250 170M1321
PC2(8)X-F30 250 0808-0102-0250 170M1321
PC3(4,9)X-F35 315 0808-0102-0315 170M1322
PC2(8)X-F35 315 0808-0102-0315 170M1322
PC3(4,9)X-N20 100 0808-0102-0100 170M1317
PC3(4,9)X-N25 125 0808-0102-0125 170M1318
PC3(4,9)X-N30 160 0808-0102-0160 170M1319
PC3(4,9)X-F20 125 0808-0102-0125 170M1318
PC3(4,9)X-F25 200 0808-0102-0200 170M1320
PC3(4,9)X-F30 200 0808-0102-0200 170M1320