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.