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DEIF DVC 350 Digital automatic voltage regulator (AVR)

The DVC 350 is a cost-effective digital AVR that offers a wide range of alternator

protections and functions. Its digital setup options make it ideally suited for volume production.

Automatic Voltage Regulator

The DVC 350 is a digital automatic voltage regulator (AVR) for controlling alternators

 which require rated field currents up to 5 A. Designed for a wide range of alternators

with SHUNT, AREP (auxiliary winding), or PMG (permanent magnet) excitation,

the DVC 350 controls the alternator from the field current or the output voltage

regulation loops. It includes several protections and functions that keep the alternator

running efficiently and safely.

Wide range of regulation features

The DVC 350 offers several regulation features that satisfy most common control

requirements: reactive and line droop compensation, a soft start function,

voltage soft recovery, start on threshold, and a load acceptance module (LAM) function.

It enables regulation over a CAN bus connection, and it offers a wide range of protections

(over and under voltage, over and under frequency, over and under excitation,

and voltage unbalance). The unit is able to withstand sudden short-circuits for up to 10 seconds.

DEIF Benefits with AGC-4

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.

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

Watlow A single driver module can support up to four power modules

The options that you need…

A single driver module can support up to four power modules – and hence

four independent control loops.  Power modules are available in current ratings

covering a range from 100A to 630A.  The driver module itself supports options

boards to give you additional flexibility in your solution:

• Communications – RS485 Modbus RTU, Profibus, DeviceNet®, Modbus TCP

network protocols, CCLink*, EtherNet IP* and ProfiNet*

Predictive Load Management (PLM) – A powerful feature to effectively manage

your power requirements across multiple machines to save on your energy costs.

Read more about PLM.

• Flexible I/O – The driver module supports standard I/O and up to three additional

I/O boards with analogue inputs, analogue outputs, digital I/O and relay outputs

• LTC – The Load Tap changer option for single phase unit applications only, allows

for managing multi-tap transformers, preventing both increased harmonics and the

reduction of power factor

• Energy Counter – Available over communications and for display on user screens,

customers can access up to 5 scalable counters, one per individual phases and a 

global energy usage counter

Watlow Revolutionary modularity and configurability to meet your needs

Revolutionary modularity and configurability to meet your needs…

• Easy ordering, configuration and maintenance through modular design

• If your requirements change EPower controller can be easily adapted to meet your needs

• Minimum spares holding – many options configurable through a common

driver module e.g. firing mode, load, phases, control etc.

• Up to four power control modules provide single and multi-phase control

• Software configurable options to bring you flexibility

Software Config Options:

Control Type:

• Single phase

• 2 x single phase

• 3 x single phase

• 4 x single phase

• Two phase

• 2 x two phase

• True three phase

Firing Modes:

• Phase angle

• Half cycle

• Burst firing

• Fix modulation period

• Logic mode

Load Type:

• Standard Resistive

• Complex Resistive

• Inductive e.g. Transformer

• Short Wave Infrared

• Load Configuration

• Single phase

• Star

• Delta

• Star with neutral

• Open Delta

Feedback:

• V2

• I2

• True power

• RMS load voltage

• RMS load current

• Open loop

• Large extruders

Watlow Eurotherm® EPower™ Controller

The EPower Advanced SCR Power Controller uses the newest technologies

and innovations to manage your process and reduce your energy costs.

On every level it brings you the flexibility you need to best meet your

requirements now and in the future.

Description

• Modular Design

• Software Configurable

• QuickStart Easy Setup

• Advanced Configuration using Graphical Wiring Editor    

• Predictive Load Management

• Flexible Communications

The EPower Advanced SCR (Silicon Controlled Rectifier) Power Controller

uses the newest technologies and innovations to manage your process and

reduce your energy costs. On every level it brings you the flexibility you

need to best meet your requirements now and in the future.

Let us look after your power control for you and give you the peace of mind

that you have the best for your process – even as it changes.

• Flexibility – advanced technologies in harmony with modularity and ease of 

use to deliver your power control needs

• Efficiency – world class power control with innovative features to minimise

your energy costs with exceptional process performance

• Peace of mind – a power controller that will bring you return on investment

and can be adapted in the future if your requirements change – one product for all solutions

Watlow Eurotherm A standardized upgrade solution

Data driven performance

Support for popular industrial protocols including EtherNet/

IP and PROFINET allows easy integration into both new

and existing applications, enabling valuable insights into

your process, such as energy consumption, measurement

tracking, fault detections, and more.

• Easily connects with power monitoring software for

an insight into electrical system health and energy

efficiency

A pre-designed packaged solution

The EPower thyristor controlled power supply solution is available

in four standard sizes to cover a wide range of furnaces, with

customization available on request.

• Turnkey engineered cabinet solution, including transformers if required

• Available for single phase, or three phase 2-leg or 3-leg power control

• Cabinets are CE Marked and built with UL Listed products and UL Recognized components.

UL Listing of the solution is available on request

• Supported by Eurotherm services and Authorized Solution Provider Network

• Eurotherm services, support, and service level agreements (SLAs) available

Watlow Reduce unplanned downtime

Reduce unplanned downtime

Improved power efficiency combined with

diagnostics and health condition monitoring, help

to improve overall system robustness:

• Less equipment to maintain – no need for

power filters, power factor correction devices

or extra water cooling systems

• Monitoring and notification of key parameters

provide simplified diagnostics of process fault

conditions, for faster maintenance

• Advanced notification of heater deterioration

enables pre-ordering and scheduling of

replacement parts

• Predictive load management can keep the

power demand within the capability of the

power line, helping to reduce the risk of

power outages

Improve furnace performance

High accuracy temperature measurement

and precision power control help to improve

workpiece throughput and quality:

• High quality heat treatment

• Repeatable performance throughout the

furnace temperature range

• Achieve higher Nadcap furnace class

temperature uniformity

CapEx savings

An EPower controller based power supply

solution often costs less than an analog thyristor

or VRT design:

• Expensive additional power factor correction

systems are not required. Transformers can

be air cooled, or water cooled using the

furnace cooling system

• Digital thyristor control allows space saving,

due to a typically smaller footprint than analog

designs

• Ethernet connectivity enables communication

with other instruments and platforms,

reducing wiring costs and allowing access to

key parameters

• Greenfield electrical distribution systems

can be a smaller size due to load sharing

and shedding, which balances and limits the

power demand on the supply

Watlow Eurotherm Cost efficiency for electric furnaces

The rise in power factor and peak demand charge

penalties is driving the need for better energy

efficiency in electric heat treatment furnaces. Installing

an EPower advanced thyristor power controller

with predictive load management offers a variety

of efficiency benefits, compared to legacy analog

thyristor and variable reactance transformer (VRT)

controlled designs.

Lower energy costs

Hybrid firing modes and predictive load

management strategies offer energy saving

efficiency improvements:

• Typical power factor (PF) better than 0.9 helps

to meet the PF limits set by utility suppliers,

reducing the risk of PF penalty charges

• Predictive load management can stabilize

power demand, helping to reduce peak

demand charge penalties

• Typical energy savings ≈10%

• Typical ROI < 2 years [1]

Watlow Eurotherm Energy efficiency for electric heat treatment furnaces

Energy efficiency for electric heat treatment furnaces

Standardized digital thyristor (SCR) power supply cabinet

solutions, designed to replace VRT and analog thyristor

power supplies

Benefits

Installing an EPower™ advanced thyristor (SCR – silicon

controlled rectifier) power supply cabinet solution offers

significant CapEx and OpEx efficiency improvements, compared

to legacy analog designs:

• Typical power factor > 0.9. helps to meet utility suppliers’

power factor limits

• Patented ‘Predictive Load Management’, helps to reduce

demand charge penalties

• Typical energy savings ≈10%, with typical ROI < 2 years

• Helps to achieve a repeatable high performance process

• Condition monitoring for reducing maintenance time and cost

• IIoT ready thanks to multiple communication protocols

• Smaller footprint than a typical analog power supply

Key features

• Standardized turnkey cabinet solution

• Predictive load management strategies

• Hybrid firing modes

• Load monitoring

• Industrial communication protocols

• High efficiency power transformers

• Customization available

• Supported by Eurotherm services and Authorized Solution Provider Network

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