D350 / D550 / D700 — digital generator voltage regulators and SWITCH retrofit kits
Country: France · Model: D350 / D550 / D700
The digital voltage regulators D350, D550 and D700 control the excitation of synchronous generators with a current from 5 to 25 A and hold voltage with ±0.25 % accuracy. They work with SHUNT, AREP and PMG systems, and SWITCH kits convert generators with old analog AVRs to digital regulation.
- D350
- excitation current 5 A, accuracy ±0.25 %, 10–100 Hz, setpoint range ±30 %, U/f 0.5 < k < 3, speed monitoring
- D550
- 8 A, ±0.25 %, parallel operation with the grid, grid codes VDE-AR-N 4110 / 4105, reverse power alarm, Black Start and EASYLOG modules
- D700
- 25 A at 40 °C (20 A at 55 °C, 15 A at 70 °C), ±0.25 %, 10–400 Hz, U/f 0.5 < k < 5, USB / Ethernet
- D510C
- digital regulator for LSAP series generators
Technical specifications
| D350 | excitation current 5 A, accuracy ±0.25 %, 10–100 Hz, setpoint range ±30 %, U/f 0.5 < k < 3, speed monitoring |
|---|---|
| D550 | 8 A, ±0.25 %, parallel operation with the grid, grid codes VDE-AR-N 4110 / 4105, reverse power alarm, Black Start and EASYLOG modules |
| D700 | 25 A at 40 °C (20 A at 55 °C, 15 A at 70 °C), ±0.25 %, 10–400 Hz, U/f 0.5 < k < 5, USB / Ethernet |
| D510C | digital regulator for LSAP series generators |
| Excitation systems | SHUNT, AREP, PMG |
| Functions | loss of sensing protection, overexcitation and short circuit current limiting, droop, LAM, cos φ / kVAr / manual modes |
| Setup | EasyReg Advanced software |
| Kits | SWITCH2D350 (replaces R438, R448, R450), SWITCH2D550 (replaces R449 and modules R726, R729, R731, R734) |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
All three models regulate power factor and reactive power, and have a manual mode, grid power factor regulation, LAM and droop for parallel generators. The D350 delivers up to 5 A in the 10–100 Hz range, has a ±30 % voltage setpoint, U/f limiting with a factor of 0.5–3, loss of sensing protection, overexcitation and short circuit current limiting, and speed monitoring. The 8 A D550 is set up for parallel operation with the grid under VDE-AR-N 4110 and 4105, with a reverse power alarm. The optional Black Start module gives it 24 V DC from AREP or PMG or accepts an external 8–35 V, and EASYLOG writes data and events to an SD card over CAN, including LVRT/HVRT. The D700 for brushless generators holds 25 A continuously at 40 °C, 20 A at 55 °C and 15 A at 70 °C, works in the 10–400 Hz range with U/f limiting of 0.5–5 and is set up from the panel, over USB or Ethernet.
How to choose
The regulator is chosen by excitation current and generator operating mode. The D350 covers standalone installations and parallel groups of generators, the D550 is needed where the machine works in parallel with the grid, and the D700 sits on large brushless generators and machines up to 400 Hz. The SWITCH2D350 kit with the D350, Faston/Mate-N-Lok adapters, terminals and an NFlink module replaces the R438, R448 or R450, and the SWITCH2D550 with the D550 and labelled Mate-N-Lok cables replaces the R449 and modules R726, R729, R731, R734. Ready kits cut replacement time in half. For LSAP generators there is a separate D510C.
Request a price and lead time
D350 / D550 / D700 — digital generator voltage regulators and SWITCH retrofit kits. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does the digital regulator D550 differ from the D350?
The D550 gives 8 A of excitation instead of 5 A and meets the grid requirements of VDE-AR-N 4110 and 4105. Black Start and EASYLOG modules are connected to it.
What excitation current does the D700 give at high temperature?
Continuously 25 A at 40 °C, 20 A at 55 °C and 15 A at 70 °C, so in a hot engine room the margin is calculated from the cabinet temperature.
Is the D350 suitable for replacing an analog R450?
Yes, the SWITCH2D350 kit based on the D350 is designed to replace the R438, R448 and R450, with ready cables.
Which software is used to set up the D350, D550 and D700?
All three regulators are set up with EasyReg Advanced software, so the setup procedure is the same across the range.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.