Stamford · Automatic Voltage Regulators
MX341
MX341 Automatic Voltage Regulator
7–10 daysLead time 7–10 days · price on enquiry
In short
The MX341 is an automatic voltage regulator for Stamford alternators fitted with a permanent magnet generator (PMG). PMG excitation makes the regulator independent of main output, so it sustains short-circuit current for protective device discrimination — which a self-excited machine cannot do.
Fitment
Confirm the frame and winding number against the nameplate before ordering.
| Make | Model / frame | Notes |
|---|---|---|
| Stamford | HCI 434 / HCI 444 | PMG builds |
| Stamford | HCI 534 / HCI 544 | PMG builds |
| Stamford | UCI 274 | PMG-equipped variants only |
Specifications
| Sensing | Three-phase, 190–264 V AC |
|---|---|
| Excitation | PMG, 170–220 V |
| Output | 75 V DC continuous at 4 A |
| Regulation | ±1% |
| Short circuit | Sustains 300% for 10 s |
Cross-references
Equivalent and superseding numbers. Verify against the machine before substituting.
- E000-23413
- MX321
Symptoms that lead here
- No output on a PMG-equipped set
- Loss of short-circuit capability during fault testing
- Voltage instability under unbalanced load
Questions about this part
Can I fit an MX341 in place of an SX460?
No. The MX341 requires a permanent magnet generator to supply its excitation power. On a self-excited machine there is no PMG output to drive it, so the regulator will not function.