Document Number: EOS 05-9305
Date: 07/06/2017
ENGINEERING OPERATION STANDARD
EOS 05-9305
LUCY GEMINI 3 TYPE E RTU
Network(s):
EPN, LPN, SPN
Summary:
This standard details the application, installation and operation of the Lucy Gemini
3 Type E RTU.
Author:
James Ford
Date:
07/06/2017
Approver:
Paul Williams
Date:
19/05/2017
This document forms part of the Company’s Integrated Business System and its requirements are mandatory throughout UK
Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset
Management. If you have any queries about this document please contact the author or owner of the current issue.
Applicable To
UK Power Networks
External
☒ Asset Management
☒
G81 Website
☒ Capital Programme
☒
UK Power Networks Services
☒ Connections
☒
Contractors
☒ Health & Safety
☒
ICPs/IDNOs
☐ Legal
☐
Meter Operators
☒ Network Operations
☒ Procurement
☐ Strategy & Regulation
☒ Technical Training
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Version: 3.0
Lucy Gemini 3 Type E RTU
Document Number: EOS 05-9305
Version: 3.0
Date: 07/06/2017
Revision Record
Version
3.0
Review Date
01/12/2021
Date
07/06/2017
Author
James Ford
Reason for update: Updated
What has changed: Document moved onto new template and additional items added to stores code
table and EPN/SPN RMU retrofit options included
Version
2.0
Review Date
01/12/2021
Date
06/10/2016
Author
James Ford
Reason for update: First year review
What has changed: Updated for UKPN specification RMUs and scope reduced to only Type E RTUs
Document title revised
Version
1.0
Review Date
1 year from approval date
Date
24/11/2015
Author
James Ford
Document moved onto new template and revised.
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Document Number: EOS 05-9305
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Contents
1
Introduction ............................................................................................................. 4
2
Scope ....................................................................................................................... 4
3
Glossary and Abbreviations ................................................................................... 4
4
Description............................................................................................................... 5
4.1
Lucy Gemini 3 Type E RTU Overview ....................................................................... 5
4.2
Lucy Gemini 3 Type E RTU ....................................................................................... 6
5
Operation ................................................................................................................. 7
5.1
Local Controls and Indications ................................................................................... 7
5.2
Local Operations from the Control Unit ...................................................................... 7
6
Telecontrol ............................................................................................................... 8
6.1
Power-On Controls .................................................................................................... 8
6.2
Power-On Indications and Alarms ............................................................................. 8
7
Asset Register Data............................................................................................... 12
8
Manufacturer’s Documentation ............................................................................ 12
9
Installation and Commissioning........................................................................... 12
10
Inspection and Maintenance ................................................................................. 12
11
References ............................................................................................................. 13
11.1
UK Power Networks Standards ............................................................................... 13
11.2
National and International Standards ....................................................................... 13
12
Dependent Documents.......................................................................................... 13
Appendix A Basic HMI Operations .................................................................................. 14
A.1
Set the RTU to ‘Local’, ‘Remote’ or ‘Off’ using the HMI. ........................................... 14
A.2
Operate a Switch or Circuit Breaker ........................................................................ 15
A.3
Reset FPI Alarm ...................................................................................................... 15
Figures
Figure 1 – Lucy Gemini 3 Control Unit and RTU Layout ........................................................ 6
Figure 2 – HMI fitted to inside of RTU cabinet door ............................................................... 7
Tables
Table 1 – Power-On controls................................................................................................. 8
Table 2 – Power-On Digital Indications and Alarms .............................................................. 8
Table 3 – Power-On Analogue Indications .......................................................................... 10
Table 4 – Lucy Gemini 3 Ellipse Data ................................................................................. 12
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Document Number: EOS 05-9305
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1
Introduction
This standard details the application, installation and operation of the Lucy Gemini 3 range of
remote terminal units (RTU). The following is included in this document:








General description;
Local operation;
Power-On telecontrol facilities;
Asset Register details;
Installation and commissioning;
Inspection and maintenance;
Documentation.
Type E RTUs are used to provide control and monitoring for ground mounted secondary
switchgear.
2
Scope
This standard applies to the following:

Lucy Gemini 3 (Type E) RTU used with LPN design secondary switchgear on the LPN
secondary distribution networks (11kV);
Lucy Gemini 3 (Type E) RTU used with EPN and SPN specification Lucy RMUs in place
of the Gemini 2.5 RTU;
Lucy Gemini 3 (Type E) RTU used with the new UKPN design secondary switchgear on
the EPN, LPN and SPN secondary distribution networks (11kV).


3
Glossary and Abbreviations
Term
Definition
ACB
Air Circuit Breaker
CB
Circuit Breaker
CT
Current Transformer
DNP3
SCADA Protocol
DSL
Digital Subscriber Line (broadband comms over copper cables). ADSL
circuits are rented and SHDSL are UK Power Networks owned
EFPI
Earth Fault passage Indicator
FPI
Fault Passage Indicator
GPRS/3G/4G
Communications networks provided by Vodafone and O2
HMI
Human/Machine Interface
I/O
Input/Output, analogue, digital and control data
IP
Internet Protocol
LV
Low Voltage
PAKNET
Data comms service provided by Vodafone
PLTU
Parasitic Load Tripping Unit
Power-On
Network management system used in UK Power Networks
RJ45
Standard communications plug/socket interface
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RMU
Ring main Unit
RTU
Remote Terminal Unit
SIM
Subscriber Identity Module. Identity card used to provide access to
GPRS/3G/4G networks
SCADA
Supervisory Control and Data Acquisition
THD
Total Harmonic Distortion
TX
Transformer
UK Power Networks (Operations) Ltd consists of three electricity
distribution networks:
UK Power Networks

Eastern Power Networks plc (EPN).

London Power Network plc (LPN).

South Eastern Power Networks plc (SPN).
4
Description
4.1
Lucy Gemini 3 Type E RTU Overview
The Gemini 3 Type E RTU/Controller includes the following features:















Remote control of up to four switches or circuit-breakers (depending on ground mount or
pole mount version);
Integral FPI/EFPI functionality;
Integral PLTU functionality;
Mains powered with battery back-up;
Battery test/monitoring functionality;
Self monitoring;
IP Communications (including GPRS/3G/4G, xDSL, Satellite and Fibre);
PAKNET Communications;
DNP3 protocol;
Control/monitoring of all UK Power Network spec RMUs and ACBs;
A, V, kW kVA kVAr monitoring of the TX LV (depending on the capabilities of the power
meter installed);
Current monitoring of the RMU Tee CB (depending on the capabilities of the protection
relay/transducer installed);
Current monitoring of the RMU ring switches via the FPI CTs and RTU/RMU Umbilical
cables;
Remote configuration capability;
Additional hardwired I/O not included in the Type E RTU design can be connected using
the Auxiliary I/O box.
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4.2
Lucy Gemini 3 Type E RTU
The Lucy Gemini 3 RTU/Controller provides the control and monitoring functionality for:





UKPN Spec RMUs.
LPN Spec RMUs.
LPN ACBs.
11kV/LV Transformer LV way.
EPN/SPN Spec Lucy RMUs (in place of the Gemini 2.5).
The Gemini 3 RTU/Controller utilises modern IP communications and can operate with any
compliant IP communications systems, such as GPRS/3G, DSL etc, and will also operate
using the PAKNET system.
The main details of the Gemini 3 Type E RTU are shown in Figure 1.
Figure 1 – Lucy Gemini 3 Control Unit and RTU Layout
The ground mount RTU can be mounted to the wall of a GRP or brick substation, or can be
mounted using a floor standing frame in an open substation.
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5
Operation
5.1
Local Controls and Indications
Local controls and indications are facilitated by the use of the HMI mounted on the inside of
the cabinet door, see Figure 2.
Figure 2 – HMI fitted to inside of RTU cabinet door
5.2
Local Operations from the Control Unit
The HMI (see Figure 2) can be configured to initiate or display any function the RTU is capable
of, such as:





Local/remote selection.
Switch or circuit-breaker open/close.
Dummy circuit-breaker open/close.
Check analogue values.
Check alarm/indication states.
Open or Close a Switch or Circuit Breaker





Using the Arrow Keys select ‘Control’ in the menu and press ‘OK’.
Using the Arrow Keys select the desired switch and press ‘OK’.
Press and hold the ‘Act’ and either the ‘Open’ or ‘Close’ buttons for approx. 5 seconds.
When the HMI display shows ‘Operating’, release the buttons.
If the switchgear being operated is an RN2C there will be a delay of up to 5 seconds before
the actuator starts operating, all other switchgear will operate immediately.
After the delay (if any), the appropriate switch/CB should operate and the indication on the
HMI will show ‘Operation Finished’ and ‘Open’ or ‘Closed’ and the LED on the relevant
DSM Module will indicate the correct switch position.
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6
Telecontrol
Full telecontrol facilities including remote control, indications and alarms are available from
Power-On and described in this section.
6.1
Power-On Controls
The available telecontrol operations are given in Table 1.
Table 1 – Power-On controls
Description
Comments
Switch/CB Open/Close (up to 4)
Connected via umbilical cables
Dummy Circuit-breaker Open/Close
Internal to RTU
Start/Stop battery test
Internal to RTU
Reset FPI
Connected via umbilical cables
PLTU 1 Logic Enable/Disable
Internal to RTU
6.2
Power-On Indications and Alarms
The available telecontrol indications and alarms are shown in Table 2 and Table 3. All plant
failure alarms should be reported for investigation and remedial action in a timely manner to
avoid failure of the equipment.
Table 2 – Power-On Digital Indications and Alarms
Description
Comments
Switch/CB Open/Closed (up to 4)
Connected via umbilical cables
Dummy Circuit-breaker Open/Closed
Internal to RTU
LV1 loss of voltage
Internal to RTU
LV2 loss of voltage
Internal to RTU
Power Meter 1 Comms failed
Internal to RTU
Power Meter 2 Comms failed
Internal to RTU
Mains Fail
Internal to RTU
RTU Imminent Shutdown
The RTU will shutdown in one hour to
preserve battery. Internal to RTU
RTU charger failure
Internal to RTU
Battery test
RTU battery test result
Battery failure
RTU battery voltage below threshold
Common RTU/plant fault
Internal to RTU
Watchdog restart
RTU has been restarted due to an internal
watchdog. Internal to RTU
RTU has been reset
Internal to RTU
RTU Cabinet Door open
Internal to RTU
Flood Alarm
Connected via additional I/O box
Intruder Alarm
Connected via additional I/O box
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Description
Comments
LV1 loss of voltage
Internal to RTU
Switch on local control
Internal to RTU
PLTU Logic Disabled
Internal to RTU
PLTU Logic Operated
Internal to RTU
PLTU Logic Failed to Operate
Internal to RTU
PLTU Switch 1/2 Voltage Mismatch
Internal to RTU
Switch 1 Phase Fault
Internal to RTU
Switch 1 Earth Fault
Internal to RTU
Switch 2 Phase Fault
Internal to RTU
Switch 2 Earth Fault
Internal to RTU
Switch 3 Phase Fault
Internal to RTU
Switch 3 Earth Fault
Internal to RTU
Switch 4 Phase Fault
Internal to RTU
Switch 4 Earth Fault
Internal to RTU
Switch 1 FPI
Connected via umbilical cables
Switch 2 FPI
Connected via umbilical cables
Switch 3 FPI
Connected via umbilical cables
Switch 4 FPI
Connected via umbilical cables
Switch 1 Actuator Disabled
Internal to RTU
Switch 2 Actuator Disabled
Internal to RTU
Switch 3 Actuator Disabled
Internal to RTU
Switch 4 Actuator Disabled
Internal to RTU
TLF / Protection operated
Connected via umbilical cables
Low Gas
Connected via umbilical cables
Switch 1 L1 HV voltage lost
Internal to RTU
Switch 1 L2 HV voltage lost
Internal to RTU
Switch 1 L3 HV voltage lost
Internal to RTU
Switch 2 L1 HV voltage lost
Internal to RTU
Switch 2 L2 HV voltage lost
Internal to RTU
Switch 2 L3 HV voltage lost
Internal to RTU
RTU has power cycled router
Internal to RTU
Modbus device 3 comms failed
Internal to RTU
Modbus device 4 comms failed
Internal to RTU
Power Meter 1 Comms failed
Internal to RTU
Power Meter 2 Comms failed
Internal to RTU
LV2 loss of voltage
Internal to RTU
Modbus device 3 comms failed
Internal to RTU
Modbus device 4 comms failed
Internal to RTU
Power Meter 1 Comms failed
Internal to RTU
Power Meter 2 Comms failed
Internal to RTU
LV2 loss of voltage
Internal to RTU
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Table 3 – Power-On Analogue Indications
Description
Comments
Switch 1 L1 HV Current
Connected via umbilical cables
Switch 1 L2 HV Current
Connected via umbilical cables
Switch 1 L3 HV Current
Connected via umbilical cables
Switch 2 L1 HV Current
Connected via umbilical cables
Switch 2 L2 HV Current
Connected via umbilical cables
Switch 2 L3 HV Current
Connected via umbilical cables
Switch 3 L1 HV Current (via RTU input)
Spare for future I/O
Switch 3 L2 HV Current (via RTU input)
Spare for future I/O
Switch 3 L3 HV Current (via RTU input)
Spare for future I/O
Switch 4 L1 HV Current (via RTU input)
Spare for future I/O
Switch 4 L2 HV Current (via RTU input)
Spare for future I/O
Switch 4 L3 HV Current (via RTU input)
Spare for future I/O
LV1 Real Power (kW)
From TX LV Way monitoring unit
LV1 Apparent Power (kVA)
From TX LV Way monitoring unit
LV1 Reactive Power (kVAr)
From TX LV Way monitoring unit
LV1 Power Factor
From TX LV Way monitoring unit
LV1 L1 (red) Phase Voltage
From TX LV Way monitoring unit
LV1 L1 (red) Phase Current
From TX LV Way monitoring unit
LV1 L1 (red) Phase Voltage THD (%)
From TX LV Way monitoring unit
LV1 L1 (red) Phase Current THD (%)
From TX LV Way monitoring unit
LV1 L1 (red) Phase Real Power (kW)
From TX LV Way monitoring unit
LV1 L2 (yellow) Phase Voltage
From TX LV Way monitoring unit
LV1 L2 (yellow) Phase Current
From TX LV Way monitoring unit
LV1 L2 (yellow) Phase Voltage THD (%)
From TX LV Way monitoring unit
LV1 L2 (yellow) Phase Real Power (kW)
From TX LV Way monitoring unit
LV1 L3 (blue) Phase Voltage
From TX LV Way monitoring unit
LV1 L3 (blue) Phase Current
From TX LV Way monitoring unit
LV1 L3 (blue) Phase Voltage THD (%)
From TX LV Way monitoring unit
LV1 L3 (blue) Phase Current THD (%)
From TX LV Way monitoring unit
LV1 L3 (blue) Phase Real Power (kW)
From TX LV Way monitoring unit
LV1 Neutral Current
From TX LV Way monitoring unit
LV2 Real Power (kW)
From TX LV Way monitoring unit
LV2 Apparent Power (kVA)
From TX LV Way monitoring unit
LV2 Reactive Power (kVAr)
From TX LV Way monitoring unit
LV2 Power Factor
From TX LV Way monitoring unit
LV2 L1 (red) Phase Voltage
From TX LV Way monitoring unit
LV2 L1 (red) Phase Current
From TX LV Way monitoring unit
LV2 L1 (red) Phase Voltage THD (%)
From TX LV Way monitoring unit
LV2 L1 (red) Phase Current THD (%)
From TX LV Way monitoring unit
LV2 L1 (red) Phase Real Power (kW)
From TX LV Way monitoring unit
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Lucy Gemini 3 Type E RTU
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Description
Comments
LV2 L2 (yellow) Phase Voltage
From TX LV Way monitoring unit
LV2 L2 (yellow) Phase Current
From TX LV Way monitoring unit
LV2 L2 (yellow) Phase Voltage THD (%)
From TX LV Way monitoring unit
LV2 L2 (yellow) Phase Current THD (%)
From TX LV Way monitoring unit
LV2 L2 (yellow) Phase Real Power (kW)
From TX LV Way monitoring unit
LV2 L3 (blue) Phase Voltage
From TX LV Way monitoring unit
LV2 L3 (blue) Phase Current
From TX LV Way monitoring unit
LV2 L3 (blue) Phase Voltage THD (%)
From TX LV Way monitoring unit
LV2 L3 (blue) Phase Current THD (%)
From TX LV Way monitoring unit
LV2 L3 (blue) Phase Real Power (kW)
From TX LV Way monitoring unit
LV2 Neutral Current
From TX LV Way monitoring unit
Air Temperature
Internal to RTU
Transformer 1 Temperature
Connected via additional I/O box
Transformer 2 Temperature
Connected via additional I/O box
RTU Battery Voltage
Internal to RTU
RTU Battery Current
Internal to RTU
Switch 3 L1 HV Current (via modbus)
Connected via comms bus
Switch 3 L2 HV Current (via modbus)
Connected via comms bus
Switch 3 L3 HV Current (via modbus)
Connected via comms bus
Switch 4 L1 HV Current (via modbus)
Connected via comms bus
Switch 4 L2 HV Current (via modbus)
Connected via comms bus
Switch 4 L3 HV Current (via modbus)
Connected via comms bus
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Lucy Gemini 3 Type E RTU
Document Number: EOS 05-9305
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7
Asset Register Data
The Gemini 3 RTU is recorded in the Asset Register as a control unit (class CU). Table 4
outlines the asset data that should be recorded.
Table 4 – Lucy Gemini 3 Ellipse Data
ATTRIBUTE NAME
ATTRIBUTE DESC
NPL VALUE
BATTERYTYPE
Control Unit Battery Type
2-L12V15
BATYEARMANUF
Battery Year Of Manufacture
RTUNAME
RTU Name (LPN)
SOFTCONFIG
RTU Software/Config Version
BATTERYCOOL
Battery Cooler Fitted
N
MDL
Manufacturers Type/Model
GEMINI3
MFR
Manufacturers Name
LUC
$MFR
C
YEARMANUF
Year Manufactured (E=Estimate)
0000
$YMN
C
SERIALNO
Serial Number
8
TABLE TYPE
ART REF
$BTY
NC
$YYN
NC
NC
$SOF
NC
NC
C
C
Manufacturer’s Documentation
The manufacturer’s user manual is available in the Asset Management Site and Reference
library within Alfresco under the following path:
Reference Library > Manufacturers > Lucy.
9
Installation and Commissioning
The installation details are given in document ECS 05-9540.
The RTU configurations details are given in document ECS 05-9541.
The Substation commissioning details are given in document ECP 11-0501.
10
Inspection and Maintenance
The Gemini 3 is nominally maintenance free. The battery is designed for a life of 8 years and
should be replaced after this time. All Gemini 3 control units will have a maintenance schedule
task (MST) setup in the Asset Register for the battery replacement in accordance with EMS
10-0002 ‘Inspection and Maintenance Frequency Schedule’.
Additionally, the battery is also monitored via telecontrol. If a battery failure alarm is received
in Power-On the battery should be replaced immediately.
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11
References
11.1
UK Power Networks Standards
EAS 05-9015
Lucy Gemini 3 RTU
ECP 11-0501
Secondary Ground Mount Substation Commissioning Procedures
ECP 11-0601
GPRS/3G/4G Comms Device Commissioning Procedure
ECS 05-9540
Type E RTU and Ancillary Items Installation Procedure
ECS 05-9541
Lucy Gemini 3 Configuration Procedure
EDS 05-9003
UK Power Networks RTU Specification
EMS 10-0002 Inspection and Maintenance Frequency Schedule
11.2
National and International Standards
The Distribution Code (http://www.dcode.org.uk/)
The Electricity Safety, Quality and Continuity Regulations (ESQC) 2002 as amended (2006)
BS 7671:2008 incorporating Amendment No 1: 2011 – Requirements for Electrical Installations (IEE
Wiring Regulations Seventeenth Edition)
12
Dependent Documents
The documents below are dependent on the content of this document and may be affected
by any changes.
EAS 05-9015
Lucy Gemini 3 RTU
EAS 05-9017
Type E RTU Ancillary Items (Lucy Electric)
EBP 03-0102
HV Switchgear Remote Control Changes
ECP 11-0501
Secondary Ground Mount Substation Commissioning Procedures
ECP 11-0601
GPRS/3G/4G Comms Device Commissioning Procedure
ECS 05-9540
Type E RTU and Ancillary Items Installation Procedure
ECS 05-9541
Lucy Gemini 3 Configuration Procedure
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Appendix A Basic HMI Operations
This Appendix details how to use the HMI to:



Set the RTU to Local/Remote/Off
Operate a Switch/Circuit Breaker
Reset the FPI
Pressing the ‘Menu’ button at any time will take you back to the start page of the HMI.
Pressing the ‘ESC’ button at any time will take you back one menu level of the HMI.
Always remember to set the HMI to ‘Local’ before leaving site.
A.1
Set the RTU to ‘Local’, ‘Remote’ or ‘Off’ using the HMI.
To toggle between ‘Local’ and ‘Remote’, press and hold the ‘Mode’ button for 1 second then
release. The status will only change once the button is released.
To set the RTU controls to ‘Off’ (this means controls cannot be operated either remotely or
locally), press and hold the ‘Mode’ button for approx. 5 seconds then release. To return the
HMI to ‘Local’ or ‘Remote’, press and hold the ‘Mode’ button for approx. 1 second and
release.
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A.2
Operate a Switch or Circuit Breaker
Refer to the information located on the inside of the RTU door to identify which RTU switch is
connected to which RMU circuit breaker/switch.
Press the ‘Menu’ button.
Using the Arrow keys, select the desired Switch/Circuit Breaker and press ‘OK’.
Using the Arrow Keys select ‘Controls’ in the menu and press ‘OK’.
Using the Arrow Keys select ‘RTU SW’x’ Open/Close’ (x = the desired RTU switch number)
in the menu and press ‘OK’.
Press and hold the ‘Act’ button together with either the ‘Open’ or ‘Close’ buttons for approx.
5 seconds. When the HMI display shows ‘Operating’, release the buttons.
If the switchgear being operated is an RN2C there will be a delay of up to 5 seconds before
the actuator starts operating, all other switchgear will operate immediately.
After the delay (if any), the appropriate switch/CB should operate and the indication on the
HMI will show ‘Operation Finished’ and ‘Open’ or ‘Closed’.
A.3
Reset FPI Alarm
Press the ‘Menu’ button.
Using the Arrow keys, select the desired Switch/Circuit Breaker and press ‘OK’.
Using the Arrow Keys select ‘Controls’ in the menu and press ‘OK’.
Using the Arrow Keys select ‘FPI Reset’ in the menu and press ‘OK’.
Press and hold the ‘Act’ button together with either the ‘Close’ button for approx. 5 seconds.
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