N20
100A
N20
80A
N20
65A
N25
140A
N25
105A
N25
85A
N30
165A
N30
120A
N30
105A
Ordering Information
POWER SERIES
P C _ _ - _ _ _ _ - _ _ _ _
Microprocessor-based,
solid state power controller
Package Style
C = 65 to 250 amps
Phase
1 = 1 phase
2 = 3-phase/2-leg control, (4 SCRs)
3 = 3-phase/3-leg control, (6 SCRs)
4 = 3-phase/4-wire, wye
connected load
8 = 2 single-phase zones
9 = 3 single-phase zones
Heater Diagnostics
0 = None
1 = Heater diagnostics (required for any
heater current monitoring or current
limiting).
Output Amperage Rating
(See amperage chart to the right)
Output Voltage Rating
A = 24 to 120V
B = 200 to 480V
C = 200 to 600V
Communications
0 = None
1 = EIA/TIA-232/485 communications,
opto-isolated (field selectable)
Feedback/Retransmit
0 = None
1 = Load current feedback (0-10V or 0-20mA scalable
retransmit output) (Must have heater
diagnostics selected)
Custom
00 = None
AA = No Watlow logo with agency approval marks
XX = Custom, consult factory for options
Your Authorized Watlow Distributor Is:
2 Zone and
3 Zone and
Single Phase
3 Phase, 2 Leg
3 Phase, 3 Leg
Code Amperage Code Amperage Code Amperage
Amperage Chart—
50˚C (122˚F)
Non-Fan Cooled
Fan Cooled
F20
125A
F20
120A
F20
90A
F25
200A
F25
160A
F25
140A
F30
250A
F30
185A
F30
155A
Single Phase
3 Phase, 2 Leg
3 Phase, 3 Leg
Code Amperage Code Amperage Code Amperage
Single Phase Configuration
This configuration can be purchased with any or all the
features available on the POWER SERIES, based on
customer preference. It is intended for resistive heaters,
but can also be used on transformer connected loads in
the phase angle firing mode.
Three-Phase, Two Leg Configuration
This configuration is intended for zero cross firing only into
a stable resistive heater. Typically, a three-phase delta or
ungrounded wye connected heater is used and only two of
the three V~ line phases are switched.The third phase
is a direct connection through a bussbar on board the
POWER SERIES. Heater current monitoring and kVA options
are available via the heater diagnostics option.
Three-Phase, Three Leg Configuration
All POWER SERIES options are ava i l a ble with this
c o n fig u ra t i o n . It wo rks well with phase angle firing into a
t h r e e - p h a s e, three-wire wye or delta connected heater. In this
c o n fig u ration, the more common applications are tra n s fo rm e r
connected loads with heaters requiring a soft start and/or
current limiting.
The three-phase, four-wire configuration is intended for zero
cross firing into a three-phase grounded wye/star heater (This
is a separate hardware option, model number dependent.)
Single-Phase, Multizone Configuration
This configuration is available in two and three single-phase
zones and all the features of a single-phase unit are
available. (Note that there is only one alarm relay and all
zones in the controller must use the same control method.)
Heater Diagnostics
Heater diagnostics may include some or all of the
features that require heater current monitoring, depending
on the model selected. Heater current monitoring is only
available with heater diagnostics installed on the controller.
The features dependent on heater current monitoring are
heater bakeout, current limiting, heater kVA monitoring,
retransmit and heater monitoring alarms such as open heater,
heater out of tolerance, load balance and shorted SCR
detection/error. Heater diagnostics must also be installed
if you need phase angle control with current limit.
North American Sales Offices:
Atlanta, (770)972-4948 • Austin, (512)249-1900 • Birmingham, (205)678-2358 • Charlotte, (704)573-8446 •
Chicago, (847)458-1500 • Cincinnati, (513)398-5500 • Cleveland, (330)467-1423 • Dallas, (972)620-6030 • Denver, (303)798-7778 •
Detroit, (248)651-0500 • Eastern Canada, (450)433-1309 • Houston, (281)440-3074 • Indianapolis, (317)575-8932 • Kansas City, (913)897-3973 •
Los Angeles, (714)935-2999 • Louisiana, (318)864-2864 • Maryland/Virginia, (215)345-8130 • Minneapolis/Manitoba, (952)892-9222 •
Nashville, (615)264-6148 • New England, (603)882-1330 • New York/New Jersey/Philadelphia, (215)345-8130 • New York,Upstate, (716)438-0454 •
Ontario, (905)979-3507 • Orlando, (407)351-0737 • Phoenix, (602)298-6960 • Pittsburgh, (412)322-5004 • Portland, (503)245-9037 •
Raleigh/Greensboro, (336)766-9659 • St.Louis, (314)878-4600 • Sacramento, (707)425-1155 • San Diego, (714)935-2999 •
San Francisco, (408)434-1894 • Seattle, (425)222-4090 • Tampa/St. Petersburg, (407)647-9052 • Tulsa, (918)496-2826 •
Western Canada, (604)444-4881 • Wisconsin, North (920)993-2161 • Wisconsin, South (262)723-5990
Asian Sales Offices:
Australia, +61 (3) 9335-6449 • China, +86 (21) 6277-2138 • Japan, +81 (03) 5403-4688 • Korea, +82 (02) 575-9804 •
Malaysia, +60 (4) 641-5977 • Singapore, +65 777-9488 • Taiwan, +886 (0) 7-288-5168
European Sales Offices:
France, +33 (01) 3073-2425 •
Germany, +49 (0) 7253-9400-0 • Italy, +39 (02) 458-8841 • Sweden, +46 31 7014959 • United Kingdom, +44 (0) 115-964-0777
Latin American Sales Office:
Mexico, +52 (442) 217-6235