- The original motor driven air compressor contactor is undersized for the actual loads encountered.
- Measurements taken on a 70 series locomotive illustrate why a high rate of contactor failures occur:
- Measured continuous current - 429 amps
- Existing contactor continuous rating - 270 amps
Air Compressor Contactor Ratings
Original Installation Versus RSA Upgrade
Existing OEM Contactor
NEMA Size 5
Manufacturer Rating - 325 amps
AC-3 Rating - 270 amps
Surge Rating - 2700 amps
RSA Contactor
NEMA Size 6
Manufacturer Rating - 540 amps
AC-3 Rating - 460 amps
Surge Rating - 4600 amps
|
|
70 Series Air Compressor Kit |
|
|
|