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Acme® Transformer™ Products vs. U/L Insulation Systems & U/L Standards
Acme
Construction
Style
Acme Catalog
Product Name U/L Standard
U/L Product
Catalog
U/L File
Number
U/L Listed
Control
Number
U/L Insulation
Number
Insulation
System
Temperature/C
kVA Single
Phase
kVA Three
Phase
Enclosed
General
Purpose and
Buck-Boost
506 XPTQ E79947V1 50B8 B3223 130 .50-.150 N/A
Compound
Filled
(Encapsulated)
General
Purpose and
Buck-Boost
and DIT
506 XPTQ E79947V1 50B8 X3221
H3221
155
180
.25-5.0
7.5-25.0
N/A
7.5-75.0
Panel Trans ® 1062 YEFR E56936V1 N/A
H3180
H3221
180
180
5.0
7.5-25.0
N/A
9.0-30.0
Hardwired
CVR 1012 QQFU E86492V1 6B81
B3223
X3221
130
155
.25-3.0
5.0-15.0
N/A
N/A
Portable PLC 1012 QQFU E86492V1 60B1 B3223 130 .25-2.0 N/A
Open Core
& Coil
Industrial
Control
506 XPTQ E79947V1 50B8 B3223 130 .050-5.0 N/A
Air Cooled
Ventilated &
Non Ventilated
General
Purpose
Opti-Miser®
& DIT
1561 XQNX E12547V3 542B C3222 220 37.5-250.0 25-1000
Enclosed
Air
Conditioning
and
Refrigeration
Appliance
NONE NONE NONE N/A NONE 130 .085-2.0 N/A
① % of rated current (or next higher standard rating).
② In cases where the secondary is overcurrent protected, the primary overcurrent protection rating can be no more than 250% (2.5 times) full load amps (shown on above chart).
For example, if a 10 kVA, single phase transformer has a 480V primary and a 120/240 secondary, and the secondary is overcurrent protected, maximum primary overcurrent
protection rating is 20.8 amps (full load current) x 2.5 (250%) = 52. Therefore, use a standard 50 amp fuse or breaker selected from NEC Section 240-6 (below).
Section 240-6 of the 1999 National Electrical Code. The standard ampere ratings
for fuses and inverse time circuit breakers shall be considered 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600, 700,
800, 1000, 1200, 1600, 2000, 2500, 3000, 4000, 5000 and 6000 amperes.
Exception: Additional standard ratings for fuses shall be considered 1, 3, 6, 10, and 601. “Extracted by permission from ANSI/NFPA 70-1999, National Electrical Code ®,
Copyright ©,1999, National Fire Protection Association, Boston, MA.”
Acme Electric–Power Distribution Products Division has never used polychlorinated biphenyls (PCBs) in the manufacture of our quality products.