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- Description
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- Code map
- Contribute
- Competitive Models
- Manufacturer
- Send enquiry
- Vessels
- Spares
- Vendors
- Did you know
Description
Larger analog AVR with PMG input, common on bigger LSA frames.
Did you know
- The Leroy-Somer R438 Automatic Voltage Regulator (AVR) is considered one of Leroy-Somer's older offerings, yet it remains a robust and reliable product.
- The R438 is positioned as an analog AVR compatible with alternators utilizing AREP or PMG excitation systems, suitable for a wide power range from 10 kVA up to 35,000 kVA. For shunt applications, Leroy-Somer recommends models like the R250 or R220.
- Its primary strength lies in its excellent voltage regulation, maintaining stability even under demanding industrial load conditions with a regulation of +/- 0.5% to +/- 1%. A key feature is the integrated Load Acceptance Module (LAM) system, which helps the generator recover from transient voltage drops by temporarily decreasing voltage when a significant load is applied.
| Model | Excitation System Compatibility | Voltage Regulation | Nominal Excitation Current | Max Excitation Current (10s) | Supply/Detection Voltage Range |
|---|---|---|---|---|---|
| R438 | AREP or PMG | ± 0.5% to ± 1% | 5A | 8A | 95-520V AC |
| R250 | SHUNT | ± 0.5% | 5A | 7A | 85-139V AC |
| R450 | SHUNT/AREP and PMG | ± 0.5% | 6A | 10A | 95-530V AC |
Competitive Models
^ZVCX DSEA106
Original DSEA106 (pre-MKII, legacy service).
^ZVEF SE500
Higher-capacity analog AVR.
^ZVCU DSE0700 MKII
Pocket-size genset control.
^ZVAF SX421
Earlier shunt-excited variant, still serviced on older sets.
^ZVCB DSEA109 MKII
Higher-power standalone AVR with external voltage trim input.
Send enquiry
Send an enquiry to the manufacturer of ^ZVBB R438. One broadcast per day.
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Code map
^Z V B B │ │ │ └── Model: R438 │ │ └───── Make: Leroy-Somer (Nidec) │ └──────── Equipment: Automatic Voltage Regulator └─────────── System: Automation Spares