RECTIFIER ORDERING CODES

1^st Letter: Model

A: Custom Air Cooled	XO: Explosion Proof Oil	UT: Utility Air Cooled
SA: Standard Air Cooled	O: Oil Immersed Nonclassified	SWO: Swing Out Series
SD: Single Door	SS: Service Station	NPA: NEMA Type Air Cooled
PTR: Portable Test

2^nd Letter: Type

S: Standard Tap Adjust	P: Automatic Potential Control
V: Variable (variac) Control	CC: Constant Current

3^rd Letter: Rectifier Element

Y: Silicon Full-Wave Bridge

Z: Selenium Full-Wave Bridge

4^th & 5^th Letter: DC Ratings

DC maximum voltage rating in volts followed by DC maximum current rating in amperes, separated by a hyphen. Example: 50-50

6^th Letter: AC Input

A: 115 V Single Phase	D: 115/230 V Single Phase	G: 230/460 V Three Phase
B: 230 V Single Phase	E: 230/460 V Single Phase	H: Specify
C: 460 V Single Phase	F: 208 V Three Phase

7^th Letter: AC Wiring

A: Wired for Higher Input Voltage

B: Wired for Lower Input Voltage

8^th Letter: Features and Options

A: Slide out transformer and stack racks	K: AC secondary and DC negative fuses
B: Base mounting pedestal (12" standard)	L: AC secondary, DC positive and negative fuses
C: AC and DC lightning arrestors	M: 115 VAC convenience outlet
D: DC lightning arrestor only	N: Bare mill (raw) aluminum enclosure
E: AC lightning arrestor only	O: TGIC powder coated aluminum enclosure (specify color)
F: Efficiency filter choke	P: Hot-dipped galvanized enclosure (11 ga)
G: Meter switches	Q: Painted steel enclosure (14 ga, specify color)
H: Communications filter (choke & capacitor)	R: Stainless steel enclosure (specify gauge)
I: DC failure light (guard & globe)	S: Capacitor
J: DC failure light (1 inch oil tight pilot light)	Z: Additional special features (specify)

Example, Rectifier Ordering Codes:

A S Y 30 50 D A ACFGKMO  Unit description
1 2 3 4  5  6 7 8        Letter/number reference