DEIF DVC 350 Digital Voltage Controller AVR

Name: DEIF DVC 350 Digital Voltage Controller AVR
Brand: DEIF
SKU: DVC 350

A compact digital AVR for shunt, AREP and PMG alternators

The DEIF DVC 350 is a digital voltage regulator that controls an alternator from the field current or the output voltage regulation loop. It is designed for alternators with SHUNT, AREP (auxiliary winding) or PMG (permanent magnet) excitation and adjusts the excitation current in the exciter field to hold the desired alternator output. DEIF states it can work with a wide range of existing alternators, with up to 5 A excitation current.

Technical specifications

Parameter	Specification
Manufacturer / series	DEIF A/S, DVC 350 Digital Voltage Controller
Variant	01: DVC 350 5 A, 277 V, item no. 2913940140-01
Excitation supply	Terminals for PMG, AREP or SHUNT; 50 to 277 V AC; consumption under 3000 VA
Rated field current	0 to 5 A; field forcing 10 A for 10 s; recommended field resistance above 4 ohm
Auxiliary DC supply	12 or 24 V DC nominal, 8 to 35 V DC range; under 500 mA; mandatory (no black start)
Voltage sensing	3 phases with neutral or 2 phases; 0 to 530 V AC; under 2 VA
Voltage regulation accuracy	Plus or minus 0.25 percent, three-phase average, harmonic distortion under 5 percent
Voltage adjustment range	0 to 150 percent of rated voltage
Quadrature droop range	-20 to 20 percent
Frequency range	10 to 100 Hz
Protections	Over and under voltage (59, 27), over and under frequency (81H, 81L), over and under excitation (32FV, 32RV), voltage unbalance (47), open and shorted diode
I/O and communication	2 digital inputs or outputs (30 V DC, 60 mA); 1 analogue input; USB; CAN J1939
Ambient temperature	-40 to 70 °C; storage -55 to 85 °C
Dimensions and weight	140 x 125 x 52.9 mm; 0.45 kg
Approvals	CE, UL
Document	Data sheet 4921240615E (EN), 8 pages

Regulation modes and setup

There are two regulation modes: voltage, with an adjustable set point as the default, and field current as a manual mode. Regulation features include reactive droop and line droop compensation, soft start, a load acceptance module (LAM), soft voltage recovery and start on threshold. Setup is done through the USB port with the DEIF EasyReg Advanced utility software, which also monitors values during commissioning and saves and downloads settings.

Two potentiometers on the housing adjust the PID global gain or reactive droop (STA.) and the voltage (VOLT.). The terminals cover excitation F+ and F-, the power supply, alternator voltage sensing, current measurement for parallel operation with a CT, the CAN port, the analogue input and the digital channels.

Controllers and ordering

DEIF states the DVC 350 can be used with an AGC 150 or iE 250 controller for digital voltage regulation, with those controllers commanding it and reading fault data over CAN bus much like an engine control unit. Hardware and firmware versions in the sheet are hardware 1 and firmware 1.00. For the alternator, give the excitation type, rated field current and resistance, the aux DC supply and whether parallel operation with a CT is needed. For a higher field-current device see the separate DVC 550 page.

For installation, DEIF specifies mounting in a cabinet or terminal box without excessive vibration, ambient temperature of -40 to 70 °C, 95 percent relative humidity (IEC 60068-2-14 test Db) and a maximum impact of 9 g on all three axes. The EMC standards listed are IEC 61000-6-2 and IEC 61000-6-4, with dry heat, damp heat and cold tests to IEC 60068-2-2, 60028-2-30 and 60068-2-1. The digital channels can each be used as an input or an output, and the analogue input accepts 4 to 20 mA, 0 to 10 V, plus or minus 10 V or plus or minus 5 V.

How the DEIF DVC 350 works

The regulator reads the alternator output voltage on its sensing terminals. It compares the reading with the set point. It then raises or lowers the current in the exciter field to hold the output steady. In manual mode it holds a field current instead.

Where the DVC 350 is used

Shunt excited alternators
AREP excited alternators
PMG excited alternators
Replacement of existing regulators
Generator sets up to 5 A excitation

Selection checklist for the DVC 350

Excitation type
Field current
Field resistance
Excitation supply voltage
Auxiliary DC supply
Sensing voltage
Droop needs
Communication needs

Installation, commissioning and maintenance notes for the DVC 350

Mount the regulator in a clean, dry place. Wire the excitation, the sensing and the 12 or 24 V DC supply. Connect a PC to the USB port and load the settings with the EasyReg utility. Check the voltage set point under load.

Requesting a quotation for the DEIF DVC 350

Please send the alternator excitation type, the field current and the voltage. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

DVC 350 regulator type

It is a digital automatic voltage regulator.

DVC 350 excitation current

The rated field current is 0 to 5 A.

DVC 350 field forcing

Field forcing is 10 A for 10 seconds.

DVC 350 excitation supply

The excitation supply is 50 to 277 V AC.

DVC 350 auxiliary supply

The auxiliary supply is 12 or 24 V DC.

DVC 350 voltage sensing

Sensing is on three phases with neutral or on two phases.

DVC 350 regulation accuracy

The accuracy is plus or minus 0.25 percent.

DVC 350 voltage adjustment

The set point adjusts from 0 to 150 percent of rated voltage.

DVC 350 frequency range

The frequency range is 10 to 100 Hz.

DVC 350 regulation modes

Modes are voltage regulation and manual field current.

DVC 350 droop

Reactive droop and line droop compensation are provided.

DVC 350 start features

It has soft start and a load acceptance module.

DVC 350 protections

Protections cover over and under voltage, frequency and excitation.

DVC 350 communication

It has a USB port and CAN J1939.

DVC 350 inputs and outputs

It has two digital channels and one analogue input.

DVC 350 ambient temperature

The ambient range is minus 40 to plus 70 degrees C.

DVC 350 size

It measures 140 x 125 x 52.9 mm and weighs 0.45 kg.

Regulator records for the DVC 350

Record the settings file, the set point and the commissioning results.

Choosing the right DVC 350 settings

Choose the settings from the alternator data sheet and the load.

Documents and quotation

Download the DEIF DVC 350 data sheet 4921240615E (EN) from this page. A quotation request needs the exact variant, any option letters, quantities and the engine or alternator details. See Diesel Generator Spare Parts for related DEIF controllers and generator control products.

DEIF genset and power management controllers

DEIF describes itself as a supplier of power control solutions for decentralised power generation on land and at sea. Its genset controllers range from the compact SGC and CGC units to the AGC 150 and AGC-4 Mk II controllers, which add synchronisation and power management for plants with many gensets. DEIF data sheets state the supply range, I/O, protections and approvals of each controller.

Frequently Asked Questions