120V:277V Series
Step-Up Autotransformers
for Lighting Applications
Features
• Input Voltage: 120V, 60 Hz
• Output Voltage: 277V, 60 Hz
• Insulation Rating: 130ºC Class B
• Non-isolated Autotransformer
• 5 Year Warranty - Industry Leading
Step-Up Autotransformers
Part Number
120:277-275VA
120:268:277-500VA
Losses
18W
25W
Input Current
Max Load
0.95 A
1.77 / 1.71 A
Input Current
No Load
0.280 A
0.220 A
Weight
(lbs)
7.0
8.6
Dimensions
Model
275VA
500VA
A
(in)
3.80
4.15
B
(in)
3.15
3.50
C
(in)
3.15
3.40
D
(in)
3.00
3.25
E
(in)
3.30
3.75
Step-Up autotransformers designed especially for
lighting applications, typically used with 277V LED
Drivers, T-5 or T-8 Electronic Fluorescent Ballasts,
Electronic HID and Plasma/Induction Ballasts in
Industrial and Commercial applications.
A
240 ±10
Wiring
277V BLACK
268V BLUE
B
120V RED
(500VA Model Only)
COM WHITE
COM WHITE
D E
2
3
1
C
E318949
Specifications subject to change without notice.
Rev 12-10-14
Thomas Research Products • 1215 Bowes Rd • Elgin, IL 60123 • T 847-515-3057 • F 847-515-3047 • www.trpssl.com