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ABB UniSec Digital Operation And Maintenance Manual
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ABB UniSec Digital Operation And Maintenance Manual

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D I S T R I B U T I O N S O L U T I O N S
UniSec Digital
Operation and maintenance manual
Index
Safety
Introduction
1. Technical Specifications
2. General information about UniSec Digital
2.1 Maintenance intervals
2.2 Inspections
2.3 Assistance
2.4 Repair and replacement
2.5 Measurements given by LHMI module
2.2 Alarms and corrective actions
3. Replacement of wireless sensors
and concentrator
4. Replacement of ambient sensor
5. Replacement of screen pressure gauge
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3
5
6
7
7
7
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  • Page 1 — D I S T R I B U T I O N S O L U T I O N S UniSec Digital Operation and maintenance manual Index Safety Introduction 1. Technical Specifications 2. General information about UniSec Digital 2.1 Maintenance intervals 2.2 Inspections 2.3 Assistance 2.4 Repair and replacement...

  • Page 2: Qualified Personnel

    Comply with the safety regulations in force in the are strongly advised to engage the services of ABB place of installation assistance personnel for maintenance and repair work. NOTE Information of crucial importance This manual is an addition to the operation...

  • Page 3: General Aspects

    D I S T R I B U T I O N S O LU T I O N S — Introduction General aspects Regulations and specifications CEI EN/IEC Title UniSec is an air-insulated switchgear for indoor use, standards designed for the secondary distribution of medium IEC EN 62271-200 High voltage switchgear and controlgear voltage. UniSec switchgear is the result of on-going Part 200: Metal-enclosed factory-built innovation and the desire to meet the requirements assemblies for rated voltages above 1 kV and up to and including 52 kV of a constantly evolving market.

  • Page 4: Operating Conditions

    Pollution to prevent condensation from forming and, consequently, corrosion or other adverse effects. The ambient air must not be excessively polluted by dust, smoke, corrosive and/or inflammable gases, vapours or The operating system of the heaters depends on salinity the relative design, while the specifications must (1) Consult ABB for –25°C operating temperatures and –40°C be taken from the order documents storage temperatures Table 2. Operating conditions...

  • Page 5: Technical Data

    1000 1000 gas in switch-disconnector Rated filling pressure Minimum operating pressure Quantity of SF gas 0,25 0,25 0,25 (1) Consult ABB for 21 kA/52.5 kAp (2) For LSC2B classified units (3) For Hysec 16 kA (1s) 40 kAp (4) 25 kA 2s for LSC2A classified units 1.2 Internal arc withstand NOTE Consult the manuals of the respective classification apparatuses for the specifications of any additional equipment, e.g. relays and circuit-...
  • Page 6 U N I S E C D I G I TA L M A N U A L E D I F U N Z I O N A M E N TO E M A N U T E N Z I O N E — 2. General information about UniSec Digital The UniSec Digital monitoring system can be...
  • Page 7 -M concentrator and all the sensors connected to it. If the value “0” is shown in the LHMI module or in Health diagnosis screen the mobile APP, it means that the sensor is faulty or This screen shows the general condition of the not connected correctly. system by indicating its “health status, which can In this case it is necessary to check that the wiring is carried out according to the wiring diagram, if it is • Good: f all the parameters are within the specified still not possible to display the measurement limits correctly, contact ABB. • Bad: If at least one parameter is not within the specified limits 2.3 Assistance For UniSec Digital units, the same assistance The parameter beyond the specified limits appears instructions indicated in paragraph 4.4 of the UniSec in the “Diagnosis” line: • Good: If all the parameters are within the 1VFM200005 manual remain valid. specified limits • Temp abnormal: In the case of temperature 2.4 Repair and replacement imbalance between the phases •...
  • Page 8 Consult the single-line diagram of the switchgear to find the positions of the sensors that transmit temperature values to the LHMI module. NOTE Consult manual 2NGA000492 for further details about use of the LHMI module 2NGA000492 • Ambient parameters: The temperature and 2.6 Alarms and corrective humidity values measured by the ambient sensor are displayed in this screen. Concentrator MDC4 -M is configured by ABB with warning and alarm thresholds for the temperature Consult the single-line diagram of the switchgear to measurements of the main circuit and for gas find out where the ambient sensor is installed. pressure measurement. Using the mobile App, the LHMI module or the leds on the concentrator, you can check whether the values measured in real time exceed the alarm thresholds. NOTE The threshold values are defined on the...
  • Page 9 D I S T R I B U T I O N S O LU T I O N S Similarly, the measurement that exceeds the • In the event of a warning, it means that the warning threshold is shown in yellow in the mobile parameter is outside the nominal values and is APP. approaching the alarm threshold. In this case it is necessary to monitor the parameter to prevent it from exceeding the alarm threshold and to intervene during the next scheduled maintenance intervention to identify the cause of the anomaly. NOTE Consult the UniSec operation and maintenance manual for further details about maintenance operations WARNING If one or more of the temperature values in...
  • Page 10 U N I S E C D I G I TA L M A N U A L E D I F U N Z I O N A M E N TO E M A N U T E N Z I O N E —...
  • Page 11 D I S T R I B U T I O N S O LU T I O N S • Set the new sensor in the same position as the Example of assembly on cable connecting to CT old one. • Fasten the strap around the busbar, then make sure that the sensor remains firmly in contact with the busbar and cannot move. • Wrap the sensor strap around both busbars if there are two busbars per phase. To make sure that communication is correct, c) Repeat the operation for all the sensors in the energize the circuit where the sensors are installed panel.
  • Page 12 U N I S E C D I G I TA L M A N U A L E D I F U N Z I O N A M E N TO E M A N U T E N Z I O N E —...
  • Page 13 D I S T R I B U T I O N S O LU T I O N S — 4. Ambient sensor replacement b) Install the new sensor DIN-type • Fasten the sensor to the DIN rail. support Ambient sensor A) Remove the old sensor • Detach the connector from the sensor. • Fasten the support to the structure. • Unscrew the fastening screw of the DIN rail. •...
  • Page 14 U N I S E C D I G I TA L M A N U A L E D I F U N Z I O N A M E N TO E M A N U T E N Z I O N E —...
  • Page 15 D I S T R I B U T I O N S O LU T I O N S • Fasten the side supports of the screen. • Connect both the supply and signal connectors. • Close the low voltage compartment door. • Energize the LHMI module and make sure that the sensor measurements are transmitted to the monitor.
  • Page 16 More product information: abb.com/mediumvoltage Your contact center: abb.com/contactcenters More service information: abb.com/service © Copyright 2021 ABB. All rights reserved. The data and illustrations are not binding. We reserve the right to make changes in the course of technical development of the product.

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