DEIF Digital Voltage Controller DVC 550

General description

The DVC 550 is a digital automatic voltage regulator, which

monitors and regulates the alternator output with rated field

current up to 7 A and voltage supply up to 277 V AC.

It is designed for alternators with SHUNT, AREP (auxiliary

winding) or PMG (permanent magnet) excitation types.

The DVC adjusts the excitation current in the exciter field

according to the desired alternator output.

The DVC 550 includes several protections and functions to keep

the alternator running in full safe operation.

The utility software, DEIF EasyReg Advanced, provides a visual

interface to configure values and parameters. The intuitive

interface makes it fast and easy to monitor and troubleshoot.

EasyReg can also be configured directly with the USB port

without external power supply.

Main features

• Unique CANbus integration between DVC550 and AGC

genset controller

• Start management capability with start on threshold, soft start

and close before excitation (run up sync)

• Intelligent drying and ventilation mode for generators

• Short circuit limitation

• Loss of voltage sensing detection

• Over/ under excitation limitation

• Optimize genset performance and size using engine help

functions

◦ load acceptance module (LAM) assists generator during

heavy loads

◦ negative forcing to avoid voltage peak during load sheeding

◦ U/f ramp

◦ Soft voltage recovery

◦ stator current limitation

• Settings from AGC genset controller shared with the DVC550

via CANbus

• Grid code compliant VDE410 and VDE4105

Benefits with AGC-4

Easy installation with CAN bus

A dedicated J1939 CAN bus connection provides efficient and

exclusive communication between the DVC and the controller.

This makes it possible to, for example, quickly and easily swap

between nominal voltage or frequency settings for a generator.

Avoid genset over-sizing

Use magnetisation boosting or inductive motor starting to limit

the stator current during start-up. This reduces the need to start

multiple gensets when connecting a heavy load, and reduces

genset over-sizing requirements to a minimum.

Protect the genset from humidity

Drying: Condensation on the windings can be removed using the

genset drying mode. During drying mode heat generated from a

controlled short circuit is used to evaporate condensation on the

windings. The genset cannot be connected to the busbar until it is

safe to do so.

Ventilation: Use the genset ventilation mode to prevent

condensation forming on the windings by removing built-up humid

air using the alternator fan. Power generation is postponed until

the humidity levels are safe.

Fast backup for critical power applications

Use run-up synchronisation to start multiple gensets at the same

time while the gensets are connected to the busbar.

Gridcode compliance

The DVC 550 fast reaction speed complies with European

gridcodes. By combining the fast reaction speed with the AGC

controller, it is easy to comply with advanced gridcodes, such as

VDE 4105 and VDE 4110.