Archives

INTRODUCTION

The MOC2XXX series of motor operated controls consists of a motor-driven,

variable potentiometer and the limit switches required to provide remote

adjustment of resistance or voltage. MOC2XXX controls can be specified for

ac or dc operation with 24-, 32-, 48-, or 120-volt control power.

MODEL NUMBER DEFINITION

The model number for this series of MOCs consists of the prefix MOC2

followed by three digits. The first digit establishes the input control voltage.

The second and third digits establish the output control element characteristics.

Table 1 lists the available model numbers and the corresponding operating

characteristics. For example, MOC2305 has a 32 Vdc control input and a 500

ohm, 2 watt potentiometer.The MOC2 Motor Operated Potentiometer is a

motor-driven control device

designed to provide remote adjustment of resistance or voltage in power

system and control applications.

The MOC series combines a variable potentiometer with integrated limit

switches, enabling precise remote control while ensuring dependable

operation. Available in configurations supporting AC or DC operation with

24 V, 32 V, 48 V, or 120 V control power, the MOC2 offers flexibility for a

wide range of installation requirements.

Ideal for generator control, excitation systems, and industrial power

applications, the MOC2 simplifies remote setpoint adjustment and enhances

operational convenience. Its robust design and versatile control power

options make it a reliable solution for applications requiring accurate and

repeatable voltage or resistance control from a remote location.

Overview

The CEM-125 Contact Expansion Module delivers seamless 125 volt I/O for Basler

excitation system controllers, enabling large and complex logic schemes

while eliminating the need for costly external relays and devices. Designed for

efficiency and simplicity, the CEM-125 reduces system footprint and streamlines

system design.

Benefits

• Enables large and complex schemes, removing the need for

external relays and reducing the total footprint of the system.

• Inputs can be paralleled when used with redundant systems,

removing the need for interposing relays.

• Connects to compatible devices via CAN bus and

automatically integrates into BESTCOMSPlus® software for

simple, quick configuration of complicated systems.

Features

• Ten galvanically-isolated and externally-wetted contact inputs

• Twenty-four contact outputs

• Inputs and outputs programmable through BESTCOMSPlus®

software

• CAN communication with controller

• Compatible with DECS-250. DECS-250E, DECS-250N, and

DECS-450

Overview

Enjoy proven, dependable, high performance with Basler Electric’s AVC line.

These extremely rugged and reliable regulators provide the performance and

functionality that revolutionized the modern analog voltage regulator market,

and they are still unrivaled today. Others have attempted to imitate the AVC’s

features and functions, but only the AVC remains the total solution.

Features

• Voltage regulation accuracy of ±0.5%

• Accuracy from 0.5% up to 20% THD (harmonic associated with 6 SCR

loads)

• Outputs of 63 Vdc @ 12 Adc and 125 Vdc @ 10 Adc from a PWM output

stage

• 1 or 2X V/Hz limiting (jumper selectable)

• Selectable V/Hz slope characteristics for faster load pickup

• Single-phase or three-phase average sensing (jumper selectable)

• Paralleling input from 1-ampere or 5-ampere CT secondaries

• Nominal sensing inputs of 120 or 240 V and 50/60 or 400 Hz

• Power input from shunt connections or PMGs operating at 50 to 400 Hz

• Potted design allows installation in harsh environments.

• Accessory input

• Overexcitation shutdown

Features

• Generator control

• Engine and generator protection

• Automatic transfer switch control

• Automatic generator configuration detection

• Extremely rugged, fully-potted design

• Seven programmable contact inputs

• Three-phase mains fail detection (optional)

• SAE J1939 engine ECU communications (optional)

• Programmable analog engine senders

• Resistive sender inputs for oil pressure and coolant temperature

(optional)

• Multilingual capability

• Remote annunciation with the Basler RDP-110C (remote display panel)

• Event recording (up to 30 events in nonvolatile memory)

• Start, run, and prestart relays and four programmable outputs

• Exercise timer

• Additional contact input/output module (CEM-2020) available to expand

the capabilities of the DGC-2020ES

• Tier 4 compliance – symbol handling and alarm capabilities

Overview

The DGC-2020ES Digital Genset Controller is a rugged, reliable, and easy-to

use genset control system. It is designed to be a cost effective controller for

gensets that will either be islanded or used in a mains failure scenario. The

DGC-2020ES has all of the essentials needed for complete genset control,

protection, and metering with simple, intuitive programmable logic.

Benefits

• BESTCOMSPlus® provides flexible workspace, intuitive settings

and graphs, built-in error checking, and summary screens to easily

make settings with confidence.

• Controller ruggedness and flexibility make it ideal for rental

gensets.

• Flexibility provided by features such as:

-High-line/low-line override

-Single-phase or three-phase override

-Wye/delta/ground delta configurable

-Alternate frequency override (50/60 Hz)

• BESTlogic™Plus preprogrammed schemes and drag and drop logic

makes it easy to create logic with confidence.

Benefits

• The DECS-250 and a motor protection device working together

results in more efficient control of the machine to help avoid

machine downtime

• Maintains constant power factor or vars for varying motor loads

• Improves the plant power factor which could eliminate lower

power factor penalties

• Eliminates synchronous motor pullout issues due to insufficient

excitation

• Excitation field forcing maintains power factor or var control on

the motor during momentary voltage dips of the station power

source

• Prevents rotor overheating and motor pullout with field

overcurrent and underexcitation limiters

• Improves the life expectancy of brushless exciter diodes by

preventing motor pullout

• Brushless exciter diode monitor detects open/shorted diodes that

can cause motor vibration

• Real-time monitoring and event recording capture occurrences

within the system for live data analysis

• Loss of voltage sensing detection enables a transfer to manual

mode to maintain motor operation

• Both the DECS-250 and the BE1-11m option are programmed

using BESTCOMSPlus® software. Utilizing the same program

for both devices provides easy logic setup and communication

between the DECS-250 and the BE1-11m.

• Dual DECS-250 controller option ensures continued operation in

the event of a failure

• Prewired for easy installation into new or existing enclosures

• Current transformer (CT) shorting provision for added safety

Overview

The SMC-250 Synchronous Motor Controller is a prepackaged control

and protection solution for brushless, synchronous motor applications.

It features the DECS-250 Digital Excitation Control System and a Basler

Electric protection device for motor pullout protection. Both are integrated

into a compact package that is preconfigured, prewired, and tested for

easy installation in a new or existing enclosure, saving installation and

commissioning time.

Features

• 20-ampere, pulse-width-modulated (PWM), insulated-gate bipolar

transistor (IGBT) power stage

• Single DECS-250 or dual, redundant DECS-250 option

• Control modes: var/power factor, field current regulation, and field

voltage regulation

• Available protection:

-Power factor/loss of synchronization (55)

-Over/Under Field Current (40)*

-Fuse loss detection protects against false trip due to loss of voltage

sensing (60FL)*

-Up to 24 resistive temperature detectors (49RTD) inputs provide

thermal protection with an optional remote RTD module*

-Up to 100 starts per time interval protection (66)*

-Undervoltage (27)

-Overvoltage (59)

-Instantaneous undercurrent (37)*

-Instantaneous overcurrent (50)*

• Communication provisions:

-USB

-Modbus® RS-485 RTU

-Ethernet 100Base-T (Modbus TCP)

• Monitoring:

-Real-time monitoring

-Data logging

-Sequence of events recorder

• Programmable logic for DECS-250 and BE1-11m option

Features

• Multiple Control Modes

-Var/Power Factor

-Field current regulation

-Field voltage regulation

• Up to 10-amp pulse-width-modulated (PWM) insulated-gate bipolar

transistor (IGBT) power stage

• BESTCOMSPlus® PC software

• Preprogrammed logic

• Autotracking between modes of operation

• Real-time monitoring

• Sequence-of-events recording

• Extensive communication available

-USB

-CAN bus communication

-Ethernet 100Base-T (Modbus® TCP)

• CE compliant

• Comprehensive protection

-ES-74S relay for overexcitation protection

-ES-55 relay for power factor protection

-RTD monitoring/temperature protection with optional AEM-2020

Analog Expansion Module

-DECS-150 integrated protection

• ICRM (Inrush Current Reduction Module) for station-powered

applications

Overview

The SMC-150 Synchronous Motor Controller is a prepackaged solution for

applications requiring a single DECS-150 Digital Excitation Control System.

The system is preconfigured to adapt to a wide variety of installations

including existing or new cubicles. With the DECS-150’s enhanced capabilities,

precise motor control can be obtained. The SMC-150 is designed, built, and

completely tested in one location to optimize performance.

Benefits

• Complete monitoring of a synchronous motor and streamlined

control offer increased reliability.

• Various excitation limiters keep the system within the prescribed

parameters and prevent tripping.

• The DECS-150. used on the SMC-150. is programmed using

BESTlogic™Plus within BESTCOMSPlus® software. With its intuitive

interface, BESTlogicPlus provides the flexibility to create custom

logic schemes to meet specific requirements.

• Real-time monitoring and event recording capture occurrences

within the system for live data analysis.

• Prewired chassis for easy installation into new or existing enclosures.

• Current transformer (CT) shorting provision for added safety.

• Our prewired solutions minimize the need for system-level design

time.

• The Offline Simulator, provided in BESTlogicPlus, helps identify and

troubleshoot the logic without the physical hardware.

• Design work done by the experts in excitation technology.

Features

• Negative Forcing

• 20-amp, six-thyristor rectifier bridge

• Single and dual redundant DECS-250N option

• Dual control power provisions

• BESTCOMSPlus® PC software

• Preprogrammed logic

• Autotracking between modes of operation

• Autotracking between DECS-250N units for dual controller systems

• Real time monitoring

• Sequence of events recording

• Automatic tuning

• Extensive communication available

• USB

• CAN bus communication

• Modbus® RS-485 RTU

• Ethernet 100Base-T (Modbus TCP)

• Reactive load sharing over communication

• Field flashing provisions

• Provisions for sync check

• Optional automatic synchronizer

• Optional integrated power system stabilizer (PSS)

• Optional BE1-11g Generator Protection System available on

pan chassis/mounting plate