Basler Electric BE1-11d DC Power Protection System

Introduction

The BE1-11d DC Power Protection System provides flexible, reliable, and economical dc power

protection, control, monitoring, and measurement functions. The capabilities of the BE1-11d make it well

suited to provide comprehensive dc power protection. The BE1-11d offers dc overcurrent,

over/undervoltage, rate of rise, power, and thermal overload protection functions as well as breaker

reclosing and RTD (Resistance Temperature Detector) inputs with remote module. It offers breaker and

trip-circuit monitoring, and oscillography and sequential events recording. Control features include virtual

selector switches, circuit breaker control, virtual lockout, and variable-mode timers. System metering and

status information are available at the BE1-11d front panel and through the BE1-11d communication

ports. The system is suitable for mounting in OEM cubicle or retrofit switchgear applications.

A front-panel USB port or optional rear Ethernet port enables local communication between the BE1-11d

and a PC operating with BESTCOMSPlus® software. BESTCOMSPlus software simplifies the

commissioning process by providing a graphical interface for setting the BE1-11d and configuring a

protection and control scheme for your application. Through BESTCOMSPlus, all BE1-11d settings and

logic can be retained in a file for printing or uploading to other BE1-11d protection systems. Oscillography

and sequential events records can be retrieved from a BE1-11d, viewed, and printed.

Front-panel features include a large, backlit alphanumeric display and LED indicators that display system

parameters, BE1-11d settings, and BE1-11d status. Pushbuttons enable navigation through the display

menu, changes to settings, resetting of targets (with password access), and direct access to virtual

switches.

Applications

The capabilities of the BE1-11d make it ideally suited for applications with the following attributes:

• Isolation between the IT-D and the BE1-11d via fiber optic communications

• The flexibility provided by wide setting ranges, multiple setting groups, and multiple coordination

curves in one unit

• The economy provided by a multifunction unit. This one unit can provide all of the protection,

control, metering, and local and remote indication functions required for typical applications.

• The small size and limited behind-panel projection facilitates modernizing protection and control

systems in existing equipment

• Coordinated protection with other BE1-11 protection systems on both ac and dc sides of a

rectifier

• High-speed Ethernet communications and protocol support

• The capabilities of a numeric multifunction relay

• IEC 61850 functionality

Features

The BE1-11d protection system includes many features for the protection, monitoring, and control of dc

switchgear. These features include protection and control functions, metering functions, and reporting and

alarm functions. A highly flexible programmable logic system called BESTlogic™Plus allows the user to

apply the available functions with complete flexibility and customize the system to meet the requirements

of the protected dc switchgear. Programmable I/O, extensive communication features, and an advanced

user interface provide easy access to the features provided.

The following information summarizes the capabilities of this multifunction device. Each feature, along

with its setup and use, is described in detail in the later chapters of this manual.

General Features

HMI (Human-Machine Interface)

Each BE1-11d has a front-panel display and 12 LED indicators: Power Supply Status, Relay Trouble

Alarm, Minor Alarm, Major Alarm, Trip, and Indicator 1 through 7 (programmable in BESTlogicPlus). The

backlit, liquid crystal display (LCD) allows the BE1-11d to replace local indication and control functions

such as panel metering, alarm annunciation, and control switches. Four scrolling pushbuttons enable

navigation through the LCD menu tree. Parameters are changed using the Edit pushbutton. Targets,

alarms, and other registers are cleared with the Reset pushbutton. In Edit mode, the scrolling

pushbuttons provide data entry selections. Edit mode is indicated by an LED on the Edit pushbutton.

Select Control Switch and Operate Control Switch pushbuttons provide a means to control the logic

switches.

The LCD has automatic priority logic to govern which metering values are displayed on the screen so that

when an operator approaches, the metering data of most interest is automatically displayed without

having to navigate the menu structure. Scrollable metering parameters are selected on the General

Settings, Front Panel HMI settings screen in BESTCOMSPlus.

Device Information

The version of the embedded software (firmware), serial number, and style number are available from the

front panel or the communication ports.

Three free-form fields (Device ID, Station ID, and User ID) can be used to enter information to identify the

BE1-11d. These fields are used by many of the reporting functions to identify the BE1-11d reporting the

information. Examples of BE1-11d identification field uses include station name, circuit number, relay

system, and purchase order.

Device Security

Security settings affect read and write access. Passwords provide access security for six distinct

functional access areas: Read, Control, Operator, Settings, Design, and Administrator. Each

username/password is assigned an access area with access to that area and each area below it. An

administrator password provides access to all six of the functional areas.

A second dimension of security is provided by the ability to restrict access for any of the access areas to

only specific communication ports. For example, you could set up security to deny access to control

commands through the Ethernet port.

Setting Groups

Four setting groups allow adaptive relaying to be implemented to optimize BE1-11d settings for various

operating conditions. Automatic and external logic can be employed to select the active setting group.

Clock

The clock is used by the logging functions to timestamp events. BE1-11d timekeeping can be self

managed by the internal clock or coordinated with an external source through a network or IRIG device.

A backup capacitor and additional battery backup are provided for the clock. During a loss of operating

power, the backup capacitor maintains timekeeping for up to 24 hours depending on conditions. As the

capacitor nears depletion, the backup battery takes over and maintains timekeeping. The backup battery

has a life expectancy of greater than five years depending on conditions.

IRIG

A standard unmodulated IRIG-B input receives time synchronization signals from a master clock.

Automatic daylight saving time compensation can be enabled and set for floating or fixed dates.

NTP (Network Time Protocol)

NTP synchronizes the real-time clock to network time servers through the Ethernet port. BESTCOMSPlus

is used to establish the priority of time reference sources available to the BE1-11d, IRIG-B, NTP, DNP,

and RTC (real-time clock). The NTP address is set using BESTCOMSPlus.

Communications

Three independent communication ports provide access to all BE1-11d functions. A USB (universal serial

bus) port is located on the front panel, a two-wire RS-485 port is located on the rear panel, and an

optional Ethernet port is located on the rear panel. The RS-485 and Ethernet ports are electrically

isolated.

Modbus® and DNP3 protocols are optionally available for the RS-485 or Ethernet communication port.

The IEC 61850 protocol is optionally available for the Ethernet port when RS-485 option is N (None).

Separate instruction manuals cover each available protocol. Consult the product bulletin or Basler Electric

for availability of these options and instruction manuals. Modbus sessions can be operated

simultaneously over the Ethernet and RS-485 ports.

System Parameters

All sensing is performed using an IT-D isolation module. Each IT-D isolation module includes two

channels that are capable of sensing either dc current or dc voltage. The dc system current is sensed

using an appropriately scaled 25. 50. 75. or 100-millivolt nominal metering shunt. DC voltages are sensed

by direct connection for nominal levels up to 1.500 Vdc. The BE1-11d can utilize two IT-D modules to

sense a single dc current and up to three dc voltages.

The IT-D digitally samples the sensed inputs at a rate proportional to the rectification system nominal

power input frequency. The sampling rate is established to maintain a high accuracy of the measurement

for a dc signal with ripple content.

High-speed fiber optic communications between the IT-Ds and the BE1-11d transmit the magnitudes of

the system measurement to the protection system.