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BE1-11m Introduction
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 BE1-11m, 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 BE1-11m 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
Three-phase currents and voltages are digitally sampled and the fundamental is extracted using a
Discrete Fourier Transform (DFT) algorithm.
The voltage sensing circuits can be configured for single-phase, three-phase-three-wire, or four-wire
voltage transformer circuits. Voltage sensing circuitry provides voltage protection, frequency protection,
polarizing, and watt/var metering. Neutral-shift, positive-sequence, and negative-sequence voltage
magnitudes are derived from the three-phase voltages. Digital sampling of the measured frequency
provides high accuracy at off-nominal values.
An auxiliary voltage sensing input (Vx) provides protection capabilities for over/undervoltage monitoring of
the fundamental and third harmonic voltage of the VT source connected to the Vx input. This capability is
useful for ground fault protection.
Each current sensing circuit has low burden and is isolated. Neutral, positive-sequence, and negative-
sequence current magnitudes are derived from the three-phase currents. An independent ground current
input is available for direct measurement of the current in a transformer neutral, tertiary winding or flux
balancing current transformer. Either one or two sets of CTs are provided in the BE1-11m depending on
the style number. Refer to the style chart for more information.
Programmable Inputs and Outputs
Programmable inputs and outputs are described in the following paragraphs.
Programmable Inputs
Either seven or 10 programmable contact sensing inputs with programmable signal conditioning provide a
binary logic interface to the protection and control system. Refer to the style chart for I/O options. Each
input function and label is programmable using BESTlogicPlus. A user-meaningful label can be assigned
to each input and to each state (energized and de-energized) for use in reporting functions. Board
mounted jumpers support dual voltage ratings.
Programmable Outputs
Either eight or five programmable general-purpose contact outputs provide a binary logic interface to the
protection and control system. Refer to the style chart for I/O options. One programmable, failsafe contact
output serves as an alarm output. Each output function and label is programmable using BESTlogicPlus.
A user-meaningful name can be assigned to each output and to each state (energized and de-energized)
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