A – Custom Air Cooled
SWOM – Swing-Out series
SD – Single Door
PTR – Portable Test
UT – Utility Air
SS – Service Station
SD – Single Door
XO – Expl-Proof Oil
O – Oil Immersed
NPA – “NEMA-Type” Air
S – Standard tap adjust
P – Potential Control
V – Variable powerstat (Variac)
CC – Constant current
Y – Silicon full wave bridge
Z – Selenium full wave bridge
A – 120 VAC Single-phase
B – 240 VAC Single-phase
C – 480 VAC Single-phase
D – 120/240 Single-phase
E – 240/480 Single-phase
F – 208 VAC Three-phase
G – 240/480 Three-phase
H – Specify
A – Higher input voltage
B – Lower input voltage
A – Separate slide out transformer & stack racks
B – Base mount cabinet legs (12″ standard or specify)
C – AC & DC lightning arrestors
D – RTU Provisions (Specify #terminals & engraving)
E – Interrupt Relay (Specify Type/Rating/Location)
F – Efficiency filter choke
G – Meter switches
H – Communications filter (Filter choke & capacitor)
I – DC failure light (guard & globe)
J – DC failure light (oil tight 1″ pilot light)
K – AC Sec.(1) & DC Negative fuse
L – AC Sec.(1), DC Positive, & Negative fuses
M – 115 volt convenience outlet (Specify GFI or Non-GFI)
N – Bare mill {raw} aluminum enclosure
O – TGIC Dry Powder coated aluminum enclosure (Specify color)
R – Stainless steel enclosure (Specify SST type & ga.)
S – AC/DC Breakers (in place of fuses)
T – ___” Taller Cabinet (Specify Additional Height)
W – Without DC meters
Z – Special features (Specify)