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Description
3-phase sensing, high-accuracy, PMG-driven — premium marine sets.
Did you know
- The Stamford MX321 Automatic Voltage Regulator (AVR) has been in production since 2008. It is a product under the Cummins portfolio, reflecting the brand's dual identity within the Cummins group.
- The MX321 is a high-performance analog AVR, positioned for use with Stamford alternators that utilize a Permanent Magnet Generator (PMG) excitation system, such as the S6 and HC6 series. It is considered more advanced than self-excited AVRs like the SX460 and AS440, which derive power directly from the generator's main stator windings.
- The MX321 is chosen for its reliable and stable voltage regulation, particularly under non-linear loads, due to its PMG-powered design which isolates the control circuits. It offers robust protection features including over-voltage, over-excitation, and under-frequency protection, ensuring safe and consistent generator operation.
| Model | Sensing Input | Power Input (Excitation) | Voltage Regulation | Under Frequency Protection |
|---|---|---|---|---|
| MX321 | 190-264V AC max, 2 or 3 phase | PMG (170-220V AC max, 3 phase) | ±0.5% RMS with 4% engine governing | Adjustable set point (95% Hz) and slope (100-300% down to 30 Hz) |
| MX341 | 2 phase sensed | PMG (170-220V AC max, 3 phase) | ±1% RMS with 4% engine governing | Adjustable set point and slope |
| AS440 | 100-130V AC or 190-264V AC, 1 phase | Main Stator (100-264V AC, 1 phase) | ±1.0% RMS | Adjustable set point (94-98% Hz) |
| SX460 | 190-264V AC max, 1 phase 2 wire | Main Stator (140-220V AC max, 3 phase) | ±1% RMS | Adjustable set point (95% Hz) and slope (170% down to 30 Hz) |
Competitive Models
^ZVCX DSEA106
Original DSEA106 (pre-MKII, legacy service).
^ZVEF SE500
Higher-capacity analog AVR.
^ZVCU DSE0700 MKII
Pocket-size genset control.
^ZVCT DSE8510 MKII
Legacy power management (service).
^ZVBB R438
Larger analog AVR with PMG input, common on bigger LSA frames.
Send enquiry
Send an enquiry to the manufacturer of ^ZVAB MX321. One broadcast per day.
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Code map
^Z V A B │ │ │ └── Model: MX321 │ │ └───── Make: Stamford (Newage / Cummins Gen Tech) │ └──────── Equipment: Automatic Voltage Regulator └─────────── System: Automation Spares