Generator and Bus Protection and Metering

Multifunction protection guards against overvoltage, undervoltage, excessive forward and reverse power,

underfrequency, and overfrequency. Overcurrent, phase imbalance, loss of mains, frequency rate-of

change, phase differential, and neutral differential protection are available as options. Each protection

function has an adjustable pickup and time delay setting. Sixteen inverse time curves, in addition to user

programmable curves, enable the DGC-2020HD to offer overcurrent protection in a variety of

applications. Each protective element can be assigned to protect the generator, bus 1. or bus 2 sensing

inputs with settings groups.

Metered generator and bus parameters include voltage, current, frequency, vector shift, real power

(watts), apparent power (VA), and power factor (PF).

Engine Protection and Metering

Engine protection features include oil pressure and coolant temperature monitoring, overcrank protection,

ECU-specific protection elements, and diagnostic reporting.

Metered engine parameters include oil pressure, coolant temperature, battery voltage, speed, fuel level,

engine load, coolant level (from ECU), ECU-specific parameters, and run-time statistics.

Load Sharing

The DGC-2020HD provides analog outputs to the power system in the form of analog bias signals to the

voltage regulator and speed governor. A pulse width modulated (PWM) speed bias output is also

available. When the generator breaker is closed and load sharing is enabled, the DGC-2020HD shares

the real power load proportionally with other generators in the system. Load sharing can be implemented

on the Analog Load Share Line or through Ethernet communications. Reactive power (kvar) sharing is

accomplished through Ethernet communications.

The DGC-2020HD Digital Genset Controller has the following features:

• Local and remote generator control

• Engine, generator, loss of mains (optional), and differential protection (optional)

• Automatic transfer switch control (mains failure)

• Automatic generator configuration detection

• Generator sequencing

• Generator soft loading/unloading

• Auto synchronizing (optional)

• Programmable analog engine senders

• 16 programmable contact inputs

• Three programmable front panel LEDs, with labels

• Color Touch-Screen Display (optional)

• Up to four local analog inputs

• Demand start/stop and generator sequencing

• KW and kvar load control

• KW and kvar load sharing via Ethernet or analog load share lines

• Programmable logic

• Exercise timer

• ECU communications via SAE J1939

• Marathon DVR2000E+ voltage regulator control via SAE J1939

• Integrated USB, RS485. and Ethernet communication

• Two J1939 CAN Bus ports

• Additional modules available to expand the capabilities of the DGC-2020HD

• Mains power control modes include peak shaving, base loading, and import/export

• Automatic load shedding

• Load Anticipation Function (optional)

• Generator, Group, Mains, and Tie Breaker Control

• Generator group starting

• Complex power system control

• DIN Rail or Rear Panel mounting (optional)

An overview of DGC-2020HD Digital Genset Controller functions is provided in the following paragraphs.

Features and Functions

The DGC-2020HD provides integrated engine-genset control, protection, and metering in a single

package. Microprocessor-based technology allows for exact measurement, setpoint adjustment, and

timing functions. Front panel controls and indicators enable quick and simple

DGC-2020HD operation. A backlit liquid crystal display (LCD) can be viewed under a wide range of

ambient light and temperature conditions. Basler Electric communication software (BESTCOMSPlus®)

allows units to be easily customized for each application. Because of the low sensing burden in the

DGC-2020HD, dedicated potential transformers (PTs) are not required.

Event Recording

A history of system events are logged in nonvolatile memory. The DGC-2020HD retains records for 128

unique types of events. Each record tracks the number of times that an event has occurred and records a

time stamp of the first and last occurrences.

A Sequence of Events (SER) log is also available. This log tracks the internal and external status of the

DGC-2020HD. Events are scanned at five millisecond intervals with 1.023 events stored per record. All

changes of state that occur during each scan are time- and date-stamped. Sequences of Events reports

are available through BESTCOMSPlus. Over 1.000 records can be retained in nonvolatile memory. When

the SER memory becomes full, the oldest record is replaced by the latest one acquired.