Automatic Load Shed

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Contents

LogicLab RTEMS-based Automatic Load Shed

Hardware technical data

Power Supply

Power supply voltage: 110V DC ± 20%

  • Medium power: 20W
  • Voltage dips and short interruptions
Insensitive to 100% of Vaux for 50 ms (min)
Insensitive to 50% of Vaux for 100ms (min)

Dimensions

  • Height: 3U
  • Width: 19”
  • Depth: 34cm

Voltage inputs

  • 4 isolated voltage input channels
    • 6 inputs on 3 voltage channels with fullscale 100V (M2)
    • 1 inputs on 1 voltage channel with fullscale 400V (M1)
  • Dielectric strength 3000V DC (1 min)
  • Rated Voltage (Vn) M1:
57Vrms
100Vrms
400Vrms
  • Rated Voltage (Vn) M2:
57Vrms
100Vrms
  • Operating range: 0.01 ÷ 1.6 Vn
  • Rated voltage selection (Vn): software
  • Frequency Range: 10 ÷ 130 Hz
  • Permanent overload capability: 1.5 Vn
  • Transient overload capability - not measurable(<10s): 2Vn
  • Power dissipation:
<1VA @Vn = 400V
<0,1VA @Vn = 100V
  • Accuracy:
    • RMS value: ±0,001 Vn
    • Voltage rate: ±0,002 Vn/S
    • Frequency: ±0,002 Hz @ Vn
    • 0,01 Hz @ V>0,3VnVn
    • 0,02 Hz @ V<0,3Vn
    • Frequency rate: ±0,002 Hz/s

Alarms (digital outputs)

  • 15 Relays
    • Out of order
    • 81/81R Threshold 1
    • 81/81R Threshold 2
    • 81/81R Threshold 3
    • 81/81R Threshold 4
    • 27/59/27R Threshold 1
    • 27/59/27R Threshold 2
    • Stop threshold Min/Max voltage and/or voltage imbalance
    • Stop threshold maximum frequency difference
    • 27/59/27R/81/81R Threshold 1
    • 27/59/27R/81/81R Threshold 2
    • 81/81R Threshold 3 and/or 4
    • General alarm
    • Relay available on connector C1
    • Relay available on connector C2
  • Dielectric strength 3300V DC (1 min)
  • Rated voltage: 110V
  • Rated current: 5A
  • Maximum Switching Capacity (L/R=40ms): 0,5A @110V
  • Endurance (mechanical): ≥10e7

Digital inputs

  • 2 isolated inputs
    • Input signal close status HV switch (Red line)
    • Input signal close status HV switch (Green line)
  • Dielectric strength 33000V DC (1 min)
  • Threshold voltage: 60V ± 10%
  • Input Voltage (max): 140V
  • Time resolution: 1 ms

Current outputs

  • 4 current loop transmitters
  • Dielectric strength 33000V DC (1 min)
  • Current range: 4-20mA or ±5mA software selectable
  • Accuracy: <0,5%
  • Transient: <200ms
  • Maximum load:
    • <2KΩ @ ±5mA
    • <1KΩ @ 4÷20mA

Communication

  • HMI with 4 lines display and keypad
  • 16 LED
  • Local and remote interface
  • Ethernet 10/100 BASE-TX with auto MDI/MDI-X
  • Ethernet 100BASE-FX (SC) - optical link
  • Configurable as knot of a net LAN/WAN
  • 1 RS232 front side (19.200 baud fixed)
  • 1 RS232 back side (up to 115.200 baud)
  • Remote connection with analog modem (not included)
  • Isolated comunication port
(Ethernet: 1500Vrms – Serials: 2500 Vrms)
  • Field connection with 50 pins rectangular connectors

Customizing

  • Power Supply with different input voltage
  • Different full-scales on voltage inputs on client demand
  • Up to 6 digital inputs available for custom application
  • 24V digital input with threshold 18V ± 10%
  • Custom range for current outputs
  • HMI multi functions
  • Additional Ethernet port 10/100BASE-TX backside
  • ST connector for ethernet 100BASE-FX optical link
  • Configuration parameters and thresholds are modifiable at the request within the limits of the device
  • Integrated WebServer for parameterization with Internet Browser
  • FTPserver for record download
  • Different range for recording time
  • AC digital input
  • Optional relay outputs
  • Different logical assignments to alarm

Standards and specifications compliance

  • IEC 61000 – 4 – 2 (Level 3)
  • IEC 61000 – 4 – 3 (Level 3)
  • IEC 61000 – 4 – 4 (Level 3)
  • IEC 61000 – 4 – 5 (Level 4)
  • IEC 61000 – 4 – 6 (Level 3)
  • IEC 61000 – 4 – 8 (Level 5)
  • IEC 61000 – 4 – 10 (Level 3)
  • IEC 61000 – 4 – 12 (Level 3)
  • IEC 61000 – 4 – 16 (Level 4)
  • IEC 61000 – 4 – 17 (Level 3)
  • IEC 61000 – 4 – 29 (Level 3)
  • ENEL DV938
  • ENEL REMC01
  • ENEL REMC02
  • ENEL RMEC01
  • ENEL RCLI01
  • CEI 45-5
  • CEI 70-1 IP30 (front) IP20 (case)
  • COMTRADE standard IEEE Std C37.111-1991

Software technical data

Parameterization and device management software - SpyEAC

  • Communication interface selection (RS232, UDP, TCP, modem setup)
  • Software access configuration and folder management
  • Voltage input full scales setup
  • Device, Substation, voltage input labelling
  • Full TCP/IP Ethernet configuration parameters
  • Backside RS232 throughput configuration
  • Operating mode selection (M1/M2)
  • Trip and stop protection threshold setup
  • Output current setup
  • Digital input, relay output, protection status
  • Recording time setup (Pre-trigger time, fault time, post-fault time)
  • Memory configuration setup (circular buffer or full-fill buffer)
  • Recording extension setup (disable, on fault time, on post-fault time)
  • Self-diagnostic device state
  • Reset and trigger command from PC
  • Realtime viewing tools (analog and measure waveform, rms measure, statistic)
  • Automatic download scheduler
  • Firmware update wizard
  • Recording management (Id, Date and time, Length, Trigger condition with user label)
  • Easy-To-Use Recording management (single, selected, all recordings)
  • Device parameterization file management tools (off-line editing, default file, download file)
  • Threshold M1 mode
  • Trip threshold - frequency (ANSI 81)
Threshold available: 4
Range: 45÷55Hz @50Hz rated frequency - 55÷65Hz @60Hz rated frequency
Step: 50mHz
Enable: included/excluded
Periods of measurement: 4÷16
Periods selection: software
Trip delay time: ≤100ms
User trip delay time: 0,1÷60s
Step: 50ms
  • Trip threshold - Frequency rate (ANSI 81R)
Threshold available: 4
Range: -5Hz/s ÷ +5Hz/s
Step: 100mHz/s
Logical operator with 81: AND/OR
Enable: included/excluded
Periods of measurement: 4÷16
Periods selection: software
Trip delay time: ≤250ms
User trip delay time: 0,1÷60s
Step: 50ms
  • Stop threshold - Min/Max voltage
Threshold available: 3
Range: 0,1÷1,4Vn
Step: 0,01Vn
Enable: included/excluded
Min/Max selection: software
Stop delay time: ≤50ms
User hold time: 0,1÷60s
Step: 50ms
  • Threshold M2 mode
  • Trip threshold - frequency (ANSI 81)
Threshold available: 4
Range: 45÷55Hz @50Hz rated frequency - 55÷65Hz @60Hz rated frequency
Step: 50mHz
Enable: included/excluded
Periods of measurement: 4÷16
Periods selection: software
Trip delay time: ≤100ms
User trip delay time: 0,1÷60s
Step: 50ms
  • Trip threshold - Frequency rate (ANSI 81R)
Threshold available: 4
Range: -5Hz/s ÷ +5Hz/s
Step: 100mHz/s
Logical operator with 81: AND/OR
Enable: included/excluded
Periods of measurement: 4÷16
Periods selection: software
Trip delay time: ≤250ms
User trip delay time: 0,1÷60s
Step: 50ms
  • Trip threshold - Voltage (ANSI 27/59)
Threshold available: 2
Range: 0,5÷1Vn
Step: 0,01Vn
Enable: included/excluded
Trip delay time: ≤50ms
User trip delay time: 0,1÷60s
Step: 50ms
  • Trip threshold - Voltage rate (ANSI 27R)
Threshold available: 2
Range: -0,2V/s ÷ +0,2V/s
Step: 0,0005Vn/s
Logical operator with 27: AND/OR
Enable: included/excluded
Time of measurement: 80÷200ms
Time setup: software
Trip delay time: ≤120ms
User trip delay time: 0,1÷60s
Step: 50ms
  • Stop threshold - Min/Max voltage
Threshold available: 3
Range: 0,1÷1,4Vn
Step: 0,01Vn
Enable: included/excluded
Min/Max selection: software
Stop delay time: ≤50ms
User hold time: 0,1÷60s
Step: 50ms
  • Stop threshold - Voltage imbalance
β = max[(V4 – μ), (V8 – μ), (V12 – μ)] / μ
with μ = (V4 + V8 + V12) / 3
Threshold available: 1
Range: 0,05÷1
Step: 0,05
Enable: included/excluded
Stop delay time: ≤50ms
User hold time: 0,1÷60s
Step: 50ms
  • Stop threshold - Maximum frequency difference
γ = max[(fV4 – fV8), (fV8 – fV12), (fV12 – fV4)]
Threshold available: 1
Range: 10÷100mHz
Step: 10mHz
Enable: inclusa/esclusa
Stop delay time: ≤100ms
User hold time: 0,1÷60s
Step: 50ms

Recordings analysis software - LogOscilloEAC

  • Waveform selection wizard with colours assignment
  • Automatic selection filters for analog and digital inputs
  • Decimation value for waveform preview
  • Dual time cursor
  • Time and amplitude value in time cursor position
  • Cursor time difference
  • Time and amplitude value in mouse cursor position
  • Windows and vertical zoom tool
  • Drag-and-Drop capability for waveform overlapping
  • Signal processing and rms waveform visualization
  • Signal processing and true rms waveform visualization
  • Signal processing and spectrum visualization
  • Spectrum analysis with THD
  • Waveform export tool for image (JPG, BMP, MetaFile, PCX, PostScript, SVG)
  • Waveform export tool for Acrobat Reader (pdf)
  • Waveform export in COMTRADE format
  • Samples waveform export tool for Excel

Link

Product flyer

[English: http://www.logiclab.it/Documents/Fault%20recorder%20LogicLab.pdf]
[Italian: http://www.logiclab.it/Documents/BrochureOscilloperturbografo.pdf]

Website

[LogicLab: http://www.logiclab.it]
[PowerProbe (italian site): http://www.logiclab.it/en/DV938.htm]
[PowerProbe (italian site): http://www.logiclab.it/it/DV938.htm]

RTEMS related pages

Home: LogicLab S.r.l.
Description: DV938EAC Automatic Load Shed

Other LogicLab Applications

PowerProbe - Digital Fault Recorder
Description: PowerProbe
Technical data: Digital Fault Recorder
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