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Studio Elektronike Rijeka STER PMU Quick Start Manual

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  • Page 1 QUICK START MANUAL...
  • Page 3 © 2010-2016 STUDIO ELEKTRONIKE RIJEKA STER PMU and WAMSTER are trademarks of Studio Elektronike Rijeka. No part of this publication may be reproduced or utilized in any form or by any means without a written permission from Studio Elektronike Rijeka.
  • Page 5 Document Revisions Record APPROVED DATE Revision DESCRIPTION OF CHANGE APPROVED 1.0.885 Initial publication 2011-10-31 Updated with:  Detailed operating procedures  Wiring configurations 1.0.982 2012-01-25  Wamster manual Other minor fixes Updated with: 1.0.1100 2012-04-23  IEEE C37.118 configuration 1.0.1113 Updated Communication setup 2012-05-08 1.0.1244...

  • Page 7: Table Of Contents

    STER PMU Quick Start Manual Table of Contents Table of contents 1 Introduction ..............................5 Main Features .............................. 5 Safety considerations ........................... 6 Applicable standards ............................ 6 2 Description ............................... 7 Front panel ..............................7 Connector panel ............................8 Bottom view ..............................9 Accessories ..............................
  • Page 8 STER PMU Quick Start Manual Table of Contents Wiring configurations..........................28 4.5.1 Connecting to Low-Voltage power systems ..................28 4.5.2 Connecting to Mid- and High-Voltage power systems ............... 30 Synchronization ............................31 Frequency ..............................31 5 Instrument maintenance ..........................33 Changing batteries .............................

  • Page 9: Introduction

    Introduction 1 Introduction STER PMU is a handheld synchrophasor measurement unit, equipped with a rechargeable battery pack, GPS for time source, GPRS modem or Serial to Ethernet converter for remote data reporting, and SD card slot for local storage of 5 months of synchrophasor measurements.

  • Page 10: Safety Considerations

    Introduction SAFETY CONSIDERATIONS To ensure operator safety while using the STER PMU instruments and to minimize the risk of damage to the instrument, please note the following general warnings: The instrument is designed to ensure maximum operator safety. Usage in a way other than specified in...

  • Page 11: Description

    STER PMU Quick Start Manual Description 2 Description FRONT PANEL Figure 2.1: Front panel Front panel layout: Graphic display with LED backlight, 320 x 200 pixels. F1 – F4 Soft function keys. Their function is indicated for each screen separately, at the bottom of the LCD display.

  • Page 12: Connector Panel

    STER PMU Quick Start Manual Description CONNECTOR PANEL Warning! IN I3 C Use safety test leads only! Max. permissible voltage between voltage input terminals and ground is 1000 V Max. permissible voltage between voltage input terminals is 1730 V Figure 2.2: Top connector panel...

  • Page 13: Bottom View

    Warning! Refer to the Instrument maintenance chapter for details about replacing the batteries. Never replace the batteries while the device is connected to the power supply and measurement leads. ACCESSORIES 2.4.1 STANDARD ACCESSORIES Table 2.1: STER PMU standard accessories Description Pcs. Current transformer 5 A / 1 V (A 1037)

  • Page 14: Optional Accessories

    Voltage measurement cable, green USB to female DB9 cable Male DB9 to male DB9 cable 12 V / 1.2 A Power supply adapter for the STER PMU device NiMH rechargeable battery, type HR 6 (AA) Soft carrying bag Instruction manual for STER PMU...

  • Page 15: Getting Started

    (3.3 Cabling and connecting the device). PREPARING THE SERIAL TO ETHERNET CONVERTER If the GPRS modem is used for remote communication, STER PMU will automatically configure all the necessary parameters. In that case, you can skip this chapter and continue powering on the device.

  • Page 16: Performing A Factory Reset Of The Device

    STER PMU Quick Start Manual Getting started If unsure, please refer to your network administrator before continuing. Specifying wrong IP settings is the most likely reason for connection issues. 3.2.1 PERFORMING A FACTORY RESET OF THE DEVICE Before starting, it is advisable to make a full factory reset of the PS110 device.
  • Page 17 STER PMU Quick Start Manual Getting started 3. Make sure that the PS110 device is powered on. 4. Switch the Data/Console switch, located next to the serial port, to Console mode (indicated in figure above). 5. Start a terminal emulation software (i.e. HyperTerminal) and configure the serial connection using following...
  • Page 18 STER PMU Quick Start Manual Getting started Figure 3.6: Device configuration setup main menu To select a menu item, type the preceding menu number and press the ENTER key. Use the ESC key to exit and return to the previous menu. All the parameters can be stored into the non-volatile memory space of the device, but only if the save command is issued.
  • Page 19 STER PMU Quick Start Manual Getting started pressing ESC key and continue with the Serial port configuration, otherwise continue setting up other static IP mode parameters. Next parameter to set is the device IP address. Press 2 and then Enter. Type the device IP address in the NEW field and press Enter.

  • Page 20: Configuring The Serial To Ethernet Converter Through The Web Interface

    STER PMU Quick Start Manual Getting started Figure 3.11: Host mode configuration parameters 11.2. Serial port parameters Several Serial port parameters have to be changed as follows: Baud rate 230400 Inter character time-out Other parameters should be left unchanged. The configuration should match the following picture.

  • Page 21: Cabling And Connecting The Device

    3.3.1 CONNECTING THE POWER SUPPLY AND POWERING ON STER PMU devices are shipped with batteries partially charged and ready for use. Batteries must be inserted according to procedure described in chapter 5.1 Changing batteries. Device can operate on fully charged batteries for up to 4 hours before shutting down.

  • Page 22: Cabling Setup When Using The Gprs Modem

    GPS receiver Figure 3.15: Connecting the GPS receiver and the GPRS modem power supply Next, use the short serial cable (USB to DB9 male) to connect the STER PMU device to the serial port of the GPRS modem, as shown below:...

  • Page 23: Cabling Setup When Using The Ethernet Converter

    Figure 3.17: Connecting the GPS receiver and the Serial to Ethernet converter power supply Next, use the two provided cables (USB to DB9M and DB9F to DB9F) to connect the STER PMU device to the serial port of the SENA PS110 device, as shown below:...

  • Page 24: Configuring The Device For First Use

    STER PMU Quick Start Manual Getting started DB9 female DB9 female Switched to Data mode DB9 male PS2 male connector GPS receiver Figure 3.18: Connecting the serial cable to the PS110 converter CONFIGURING THE DEVICE FOR FIRST USE 3.4.1 MAIN SCREEN After powering on, main device screen is shown: Figure 3.19: Startup screen...

  • Page 25: Setup Menu

    STER PMU Quick Start Manual Getting started  PPS&A: synchronized and reliable Communication WAMSTER communication status:  status DISABLED: communication disabled  INIT: initialization in progress  SET CONN: configuring server address and port  CONNECTING: trying to connect to the server ...
  • Page 26 STER PMU Quick Start Manual Getting started Figure 3.21: COMMUNICATION SETUP screen STER PMU supports following types of communication links (with baud rate shown next to each option):  USB (230400 bps)  GPRS (115200 bps)  ETHERNET (230400 bps) STER PMU also supports two communication protocols for transmitting synchrophasor data: ...

  • Page 27: Managing The Device Using The Wamster Web Interface

    For detailed help on using the online web interface, please consult Chapter 6: Using the Wamster web interface. 3.4.5 POWERING OFF In order to power off the STER PMU device, serial communication needs to be disabled first. Communication can be disabled by pressing in COMMUNICATION SETUP menu, while the communication is active.
  • Page 28 STER PMU Quick Start Manual Getting started...

  • Page 29: Working With The Instrument

    1 FPS using the web interface, or completely disabling it through the Communication setup menu. VOLTAGE MEASUREMENT STER PMU can be connected to a LV, MV or HV power system using different voltage ranges. Three voltage ranges per wiring configuration are available described in the following tables:...

  • Page 30: Current Measurement

    CURRENT MEASUREMENT STER PMU performs only indirect current measurements, meaning its current inputs have to be galvanically isolated from the main circuit by using clap-on current clamps or current transducers. Current transducer 5A/1V is used by default and is a part of the STER PMU package.

  • Page 31: General Considerations For Wiring

    GENERAL CONSIDERATIONS FOR WIRING Although the STER PMU can be accessed remotely to change configuration settings, it is nevertheless important to configure the wiring properly if the device is intended to run during longer periods of time, at a distant location.

  • Page 32: Connecting Current Terminals

    STER PMU Quick Start Manual Working with the instrument 4.4.2 CONNECTING CURRENT TERMINALS IN,I3,I2,I1 Connect the four current clamp connectors to the top 4 current terminals. I3 C Always connect the cables to the device before mounting the clamps. In case of usage of non-clamp-on sensors like A1037, connection to secondary CT circuits must be performed with extreme care.
  • Page 33 STER PMU Quick Start Manual Working with the instrument I3 C Figure 4.11: Wiring configuration for a 3-phase 4-wire system Note that for direct measurement of currents at LV systems, xxxA/1V clamp-on current sensors have to be used. 3-WIRE (3W) 3-PHASE SYSTEM To configure the instrument for 3-wire (3W) measurements, start by entering the MEASUREMENT SETUP menu as described before (see Fig.

  • Page 34: Connecting To Mid- And High-Voltage Power Systems

    STER PMU Quick Start Manual Working with the instrument I3 C Figure 4.13: Wiring configuration for a 3-phase 3-wire system 4.5.2 CONNECTING TO MID- AND HIGH-VOLTAGE POWER SYSTEMS In systems where voltage is measured at the secondary side of a MV/HV voltage transformer, the instrument voltage range should be set to 150 V and scaling factor of that voltage transformer ratio has to be entered in order to ensure correct measurement.

  • Page 35: Synchronization

    STER PMU Quick Start Manual Working with the instrument SYNCHRONIZATION Synchronization input channel is used as a frequency measurement reference. Depending on the wiring configuration, it can be either U1 or U12. This parameter can also be modified in the MEASUREMENT SETUP screen.
  • Page 36 STER PMU Quick Start Manual Working with the instrument...

  • Page 37: Instrument Maintenance

    5 Instrument maintenance CHANGING BATTERIES STER PMU uses six rechargeable NiMh batteries, type HR 6 (size AA) for battery backup. Make sure that the power supply adapter/charger and measurement leads are disconnected and the instrument is switched off before opening the device.

  • Page 38: Batteries

    STER PMU Quick Start Manual Instrument maintenance BATTERIES Instrument contains rechargeable NiMh batteries. These batteries should only be replaced with the same type as defined on the battery placement label or in this manual. If it is necessary to replace batteries, all six have to be replaced. Ensure that the batteries are inserted with the correct polarity;...

  • Page 39: Periodic Calibration

    STER PMU Quick Start Manual Instrument maintenance PERIODIC CALIBRATION To ensure correct measurement, it is essential that the instrument is regularly calibrated. If used continuously on a daily basis, a six-month calibration period is recommended, otherwise annual calibration is sufficient. Contact your distributor for calibration details.
  • Page 40 STER PMU Quick Start Manual Instrument maintenance...

  • Page 41: Using The Wamster Web Interface

    STER PMU Quick Start Manual Using the Wamster web interface 6 Using the Wamster web interface After the device has connected to the server, it can be monitored and managed through the Wamster web interface. Wamster web interface provides a simple way to monitor and configure your device, as well as download (export) measured data from the cloud storage.

  • Page 42: Overview

    STER PMU Quick Start Manual Using the Wamster web interface Figure 6.2: User area: 1. navigation menu, 2. login status / Logout link / Time zone settings After logging in, at the top of each Wamster there is the navigation menu (marked with 1 on the figure above), providing access to different pages, and the user status/time area (marked as 2).

  • Page 43: Device Settings Form

    STER PMU Quick Start Manual Using the Wamster web interface  address, as reported by its GPS device  device model, serial number and firmware version  nominal grid frequency [Hz] and current reporting speed [fps]  connection quality, SD card usage info and GPS signal information On the right side of each panel, there are several visual status indicators and buttons for accessing device settings: Figure 6.4: Visual status indicators and command buttons...

  • Page 44: General Settings

    STER PMU Quick Start Manual Using the Wamster web interface Figure 6.5: Device Settings form can be used to change the various device settings 6.3.2 GENERAL SETTINGS Fields marked with (2) on the image are used to change device’s name and reporting speed.

  • Page 45: Local Triggering

    STER PMU Quick Start Manual Using the Wamster web interface Waveform Recorder: Device performs continuous 8-channel waveform (oscillogram) recording. If this functionality is enabled, the device will continuously record waveform data and store it locally (4.5 days of measurements on 32GB cards). It will also reserve most of the external SD card memory for oscillograms, so local PMU data will also be kept for 4.5 days...

  • Page 46: Rewiring Rules

    STER PMU Quick Start Manual Using the Wamster web interface Thresholds for voltage-related quantities is specified as p.u. (percent of nominal value), where the nominal value is configured on the device and can be seen on the General tab. Local triggering thresholds are separate from Wamster’s event triggering system (which is applied to incoming measurements).

  • Page 47: Digital I/O

    STER PMU Quick Start Manual Using the Wamster web interface Figure 6.8: Scaling/rotation tab can be used to further correct measurements after rewiring If factors for phases L2 and L3 are same as L1, user can mark the checkmark at the top of the panel and only enter values for phase L1.

  • Page 48: Device Comparison

    STER PMU Quick Start Manual Using the Wamster web interface DEVICE COMPARISON To compare real-time synchrophasors (positive symmetry) of your devices, use the Compare page, accessible from the navigation menu: Figure 6.10: Measurement comparison page allows real-time and historical comparison. Selected reference device is shown in green Left part of the page shows a map with geographical locations of your instruments (as reported by their GPS devices).

  • Page 49: Switching Between Real-Time And Historical Views

    STER PMU Quick Start Manual Using the Wamster web interface 6.4.2 SWITCHING BETWEEN REAL-TIME AND HISTORICAL VIEWS By default, Compare page shows real-time relative measurements for currently connected devices. In order to freeze the comparison at a specific moment in time, it is necessary to switch from Real-time to Historical view using the right panel on the Compare page: Figure 6.12: Clicking on the Real-time toggle button changes...

  • Page 50: Analyzing Trends

    STER PMU Quick Start Manual Using the Wamster web interface For each entry in the table, user can click the green Event details button at the beginning of the row to show a chart of the quantities which triggered the event. By further clicking on this chart, Trend page will be shown positioned to the related event so that user can further analyze the data and include other channels and devices into the comparison.

  • Page 51: Data Settings Sidebar

    STER PMU Quick Start Manual Using the Wamster web interface annotations placed across the chart. Figure 6.15: Trends page can be used to view and compare measurements during different time periods Trends page components: Data settings Left settings sidebar contains input boxes for basic chart data settings, and the sidebar “Update charts”...

  • Page 52: View Settings Toolbar

    STER PMU Quick Start Manual Using the Wamster web interface After changing any of the settings, the chart is not refreshed until you click the Update charts button. Start time/End These textboxes can be used to specify the time range manually. Time is specified in...

  • Page 53: Chart Interaction

    STER PMU Quick Start Manual Using the Wamster web interface Export button Opens the Export page in a new tab, with currently shown devices and time range selected for CSV export. Wf request Creates a new waveform download request, for the first second shown in the chart, and opens the Waveforms page in a new tab.

  • Page 54: Harmonics

    STER PMU Quick Start Manual Using the Wamster web interface Similar to the trends page, by selecting the area on the oscillogram chart it is possible to zoom in the range. After zooming in, selecting a different device in the same group will show the data for that device, but using the displayed zoom range, which allows easier comparison of device measurements within a group.
  • Page 55 STER PMU Quick Start Manual Using the Wamster web interface If the export resolution is higher than the default reporting resolution for a given device, you can also specify whether the server should request these "missing" frames from each device, or not. If your devices are configured to report on a lower speed, and you would like to get a detailed snapshot of a certain time range, you can choose the option to collect those frames.

  • Page 56: Remote Access

    STER PMU Quick Start Manual Using the Wamster web interface Once the export request is added, it can be canceled, but not modified. If the request is configured to collect all missing frames from the device before exporting, all devices will have to send all requested frames before the export file is completed.

  • Page 57: Support Page

    STER PMU Quick Start Manual Using the Wamster web interface Figure 6.23: If the remote instrument is in a different menu than the one shown on the web page, remote status will change to "NOT SYNCHRONIZED" Note that "SYNCHRONIZED" status does not necessarily mean that remote instrument screen is showing exactly the same contents as the web page, it only indicates that the same submenu is selected as currently shown.

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