Basler Electric BE1-851 - Manual (Page 33)

to be mode 1 (enabled) with the function blocked when contact sensing INput 2 is not (/) energized.
Contact sensing input 2 would be wired to a ground relay enable switch.
As noted before, the protection settings for this function block, pickup, time dial, and curve, must be set
separately in the setting group settings. The setting might be S0-51N=6.5,2.1,S1R for Set in group 0 – the
51N function equal to pickup at 6.5 amps with a time dial of 2.1 using curve S1 with an integrating Reset
characteristic.
The 51N function block has two logic output variables, 51NT (Trip) and 51NPU (Picked Up). The
combination of the logic settings and the operational settings for the function block govern how these
variables respond to logic and current inputs.
Output Logic Settings
BESTlogic, as implemented in the BE1-851, supports up to 16 output expressions. The output
expressions are called virtual outputs to distinguish them from the physical output relays. VOA and VO1
through VO5 drive physical outputs Out A (fail safe alarm output) and Out 1 through Out 5, respectively.
The rest of the virtual outputs can be used for intermediate logic expressions.
For example, OUT1 is wired to the trip bus of the circuit breaker. To set up the logic to trip the breaker,
the BESTlogic setting command might be SL-VO1=VO11+101T+BFPU for Set Logic – Virtual Output 1 =
to Virtual Output 11 (which is the intermediate logic expression for all of the function block tripping
outputs) or (+) 101T (the trip output of the virtual breaker control switch) or (+) BFPU (the pickup output of
the breaker failure function block that indicates that breaker failure has been initiated).
User Interfaces
Three user interfaces are provided for interacting with the BE1-851 relay: The front panel HMI, ASCII
communications, and BESTCOMS communications software. The front panel HMI provides access to a
subset of the total functionality of the device. ASCII communications provides access to all settings,
controls, reports, and metering functions of the system. BESTCOMS for BE1-851 software provides a
user friendly Windows® environment for editing settings files and uploading and downloading them from
the relay.
Front Panel HMI
The front panel HMI consists of a two line by 16 characters LCD (liquid crystal display) with four scrolling
pushbuttons, an edit pushbutton, and a reset pushbutton. The Edit pushbutton includes an LED to
indicate when edit mode is active. There are five other LEDs for indicating power supply status, relay
trouble alarm status, programmable major and minor alarm status, and a multipurpose trip LED that
flashes to indicate that a protective element is picked up. The Trip LED lights continuously when the trip
output is energized and seals in when a protective trip has occurred to indicate that target information is
being displayed on the LCD. A complete description of the HMI is included in Section 10, Human-Machine
Interface.
The BE1-851 HMI is menu driven and organized into a menu tree structure with six branches. A complete
menu tree description with displays is also provided in Section 10, Human-Machine Interface. A list of the
menu branches and a brief description for scrolling through the menu is in the following paragraphs.
1. REPORT STATUS. Display and resetting of general status information such as targets, alarms,
recloser status.
2. CONTROL. Operation of manual controls such as virtual switches, selection of active setting
group, etc.
3. METERING. Display of real-time metering values.
4. REPORTS. Display and resetting of report information such as time and date, demand registers,
breaker duty statistics, etc.
5. PROTECTION. Display and setting of protective function setting parameters such as logic
scheme, pickups, time delays, etc.
6. GENERAL SETTINGS. Display and setting of non-protective function setting parameters such as
communication, LCD contrast, and CT ratios.
Each screen in the menu tree displays the path in the upper left hand corner of the screen. Additionally,
each screen is assigned a number in the HMI section. The number indicates the branch and level in the
menu tree structure. Screen numbering helps you to keep track of where you are when you leave the
9289900990 Rev R BE1-851 Quick Start 2-3