NR Electric PCS-9705 Series User manual

PCS-9705 Series
Bay Control Units
Instruction Manual
NR Electric Co., Ltd.

Preface
PCS-9705 Series Bay Control Units Instruction Manual
I
Date: 2012-06-12
Preface
Introduction
This guide and the relevant operating or service manual documentation for the equipment provide
full information on safe handling, commissioning and testing of this equipment.
Documentation for equipment ordered from NR is dispatched separately from manufactured goods
and may not be received at the same time. Therefore, this guide is provided to ensure that printed
information normally present on equipment is fully understood by the recipient.
Before carrying out any work on the equipment, the user should be familiar with the contents of
this manual, and read relevant chapter carefully.
This chapter describes the safety precautions recommended when using the equipment. Before
installing and using the equipment, this chapter must be thoroughly read and understood.
Health and Safety
The information in this chapter of the equipment documentation is intended to ensure that
equipment is properly installed and handled in order to maintain it in a safe condition.
When electrical equipment is in operation, dangerous voltages will be present in certain parts of
the equipment. Failure to observe warning notices, incorrect use, or improper use may endanger
personnel and equipment and cause personal injury or physical damage.
Before working in the terminal strip area, the equipment must be isolated.
Proper and safe operation of the equipment depends on appropriate shipping and handling,
proper storage, installation and commissioning, and on careful operation, maintenance and
servicing. For this reason, only qualified personnel may work on or operate the equipment.
Qualified personnel are individuals who:
Are familiar with the installation, commissioning, and operation of the equipment and of the
system to which it is being connected;
Are able to safely perform switching operations in accordance with accepted safety
engineering practices and are authorized to energize and de-energize equipment and to
isolate, ground, and label it;
Are trained in the care and use of safety apparatus in accordance with safety engineering
practices;
Are trained in emergency procedures (first aid).
Instructions and Warnings
The following indicators and standard definitions are used:

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DANGER!
It means that death, severe personal injury, or considerable equipment damage will occur if safety
precautions are disregarded.
WARNING!
It means that death, severe personal, or considerable equipment damage could occur if safety
precautions are disregarded.
CAUTION!
It means that light personal injury or equipment damage may occur if safety precautions are
disregarded. This particularly applies to damage to the device and to resulting damage of the
protected equipment.
WARNING!
The firmware may be upgraded to add new features or enhance/modify existing features, please
make sure that the version of this manual is compatible with the product in your hand.
WARNING!
During operation of electrical equipment, certain parts of these devices are under high voltage.
Severe personal injury or significant equipment damage could result from improper behavior.
Only qualified personnel should work on this equipment or in the vicinity of this equipment. These
personnel must be familiar with all warnings and service procedures described in this manual, as
well as safety regulations.
In particular, the general facility and safety regulations for work with high-voltage equipment must
be observed. Noncompliance may result in death, injury, or significant equipment damage.
DANGER!
Never allow the current transformer (CT) secondary circuit connected to this equipment to be
opened while the primary system is live. Opening the CT circuit will produce a dangerously high
voltage.
WARNING!
Exposed terminals
Do not touch the exposed terminals of this equipment while the power is on, as the high voltage
generated is dangerous

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Date: 2012-06-12
Residual voltage
Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It
takes a few seconds for the voltage to discharge.
CAUTION!
Earth
The earthing terminal of the equipment must be securely earthed
Operating environment
The equipment must only be used within the range of ambient environment detailed in the
specification and in an environment free of abnormal vibration.
Ratings
Before applying AC voltage and current or the DC power supply to the equipment, check that they
conform to the equipment ratings.
Printed circuit board
Do not attach and remove printed circuit boards when DC power to the equipment is on, as this
may cause the equipment to malfunction.
External circuit
When connecting the output contacts of the equipment to an external circuit, carefully check the
supply voltage used in order to prevent the connected circuit from overheating.
Connection cable
Carefully handle the connection cable without applying excessive force.
Copyright
Version: 1.06
P/N: EN_CKZZ5305.0086.0007
Copyright © NR 2012. All rights reserved
NR ELECTRIC CO., LTD.
69 SuyuanAvenue. Jiangning, Nanjing 211102, China
Tel: [phone], Fax: [phone]
Website: www.nrelect.com, www.nari-relays.com
Email: [e-mail]
We reserve all rights to this document and to the information contained herein. Improper use in particular reproduction and dissemination
to third parties is strictly forbidden except where expressly authorized.
The information in this manual is carefully checked periodically, and necessary corrections will be included in future editions. If
nevertheless any errors are detected, suggestions for correction or improvement are greatly appreciated.
We reserve the rights to make technical improvements without notice.

Preface
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Date: 2012-06-12

Table of Contents
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Date: 2012-06-12
Table of Contents
Preface....................................................................................................I
Introduction................................................................................................................ I
Health and Safety ...................................................................................................... I
Instructions and Warnings ....................................................................................... I
Table of Contents................................................................................. V
1 Introduction........................................................................................1
1.1 Application.......................................................................................................... 1
1.2 Function .............................................................................................................. 1
1.3 Features............................................................................................................... 2
1.4 Glossary.............................................................................................................. 3
2 Technical Data....................................................................................7
2.1 Electrical Specifications .................................................................................... 7
2.1.1 AC Current Input...................................................................................................................... 7
2.1.2 AC Voltage Input...................................................................................................................... 7
2.1.3 Power Supply.......................................................................................................................... 7
2.1.4 Transducer Input ..................................................................................................................... 8
2.1.5 DC Analog Output ................................................................................................................... 8
2.1.6 Binary Input ............................................................................................................................. 8
2.1.7 Binary Output .......................................................................................................................... 8
2.2 Mechanical Specifications................................................................................. 9
2.3 Ambient Temperature and Humidity Range ..................................................... 9
2.4 Communication Port .......................................................................................... 9
2.4.1 Ethernet Port........................................................................................................................... 9
2.4.2 Optical Fiber Port .................................................................................................................. 10
2.4.3 Clock Synchronization Port................................................................................................... 10

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2.5 Type Tests ......................................................................................................... 10
2.5.1 Environmental Tests.............................................................................................................. 10
2.5.2 Mechanical Tests....................................................................................................................11
2.5.3 Electrical Tests........................................................................................................................11
2.5.4 Electromagnetic Compatibility................................................................................................11
2.6 Performance...................................................................................................... 12
2.6.1 Metering Scope and Accuracy .............................................................................................. 12
2.6.2 Control Performance............................................................................................................. 12
2.6.3 Clock Performance................................................................................................................ 12
2.6.4 Binary Input Signal................................................................................................................ 12
2.6.5 Information Refreshing Rate................................................................................................. 12
2.7 Certifications..................................................................................................... 12
3 Operation Theory.............................................................................15
3.1 Operating Mode Management ......................................................................... 15
3.2 Analog Input...................................................................................................... 15
3.3 Digital Sampling Input...................................................................................... 15
3.4 Binary Input....................................................................................................... 15
3.5 Receiving and Sending GOOSE Variables ..................................................... 18
3.6 Binary Output.................................................................................................... 18
3.7 Records............................................................................................................. 19
3.8 Interlocking....................................................................................................... 19
3.9 Synchronism-check.......................................................................................... 19
3.10 Clock Management......................................................................................... 21
3.11 Detection of Busbar VT Disconnection ........................................................ 21
3.12 Diagnostic Self-test........................................................................................ 21
3.13 Regulation....................................................................................................... 21
4 Supervision ......................................................................................23
4.1 Overview............................................................................................................ 23

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4.2 Alarm Descriptions for PCS-9705A................................................................. 23
4.3 Alarm Handling Suggestions for PCS-9705A................................................. 29
4.4 Alarm Descriptions for PCS-9705B................................................................. 32
4.5 Alarm Handling Suggestions for PCS-9705B................................................. 39
4.6 Alarm Descriptions for PCS-9705C................................................................. 42
4.7 Alarm Handling Suggestions for PCS-9705C................................................. 48
5 Hardware...........................................................................................53
5.1 Overview............................................................................................................ 53
5.2 MON module (NR4102) on Slot 01(Mandatory) .............................................. 57
5.3 AI(ECVT) (NR4201B) on Slot 02 (Optional)..................................................... 61
5.4 AI Module (NR4402) on Slot 02 and 03(Optional)........................................... 62
5.5 NET-DSP Module (NR4136A) on slot 03 (Optional)........................................ 68
5.6 BI Module (NR4501 or NR4504) on Slot 04~09............................................... 69
5.7 GOOSE Module (NR4126) on Slot 09 (Optional) ............................................ 96
5.8 DO Module (NR4411) on Slot 10(Optional) ..................................................... 99
5.9 DI Module (NR4410) on Slot 10 or 11 (Optional)........................................... 101
5.10 BO(IL) Module (NR4521) on Slot 12/13 (Optional)...................................... 104
5.11 BO Module (NR4521) on Slot 14~19 (Optional).......................................... 108
5.12 PWR Module (NR4301) on Slot 20(Mandatory)............................................116
5.13 Rear Panel Definition.....................................................................................118
6 Settings...........................................................................................131
6.1 Overview.......................................................................................................... 131
6.2 Device_Settings for PCS-9705A/B/C............................................................. 131
6.3 Comm_Settings for PCS-9705A/B/C ............................................................. 131
6.4 Function_Links for PCS-9705A/B/C.............................................................. 141
6.5 GOOSE_Links for PCS-9705A/B/C................................................................ 145
6.6 Spare_Links for PCS-9705A/B/C ................................................................... 146
6.7 System_Settings for PCS-9705A/B/C............................................................ 146

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6.8 AR_Settings for PCS-9705A........................................................................... 155
6.9 Syn_Settings for PCS-9705A......................................................................... 155
6.10 Syn_Settings1 and Syn_Settings2 for PCS-9705C.................................... 161
6.11 BI_Settings for PCS-9705A/B/C................................................................... 163
6.12 Control_Settings for PCS-9705A/B/C.......................................................... 164
6.13 TP_Settings for PCS-9705A......................................................................... 165
6.14 Regulation_Settings for PCS-9705B........................................................... 168
6.15 Interlock_Settings for PCS-9705A/B/C........................................................ 169
6.16 Transducer_Settings for PCS-9705A/B/C ................................................... 171
6.17 AC_Calbr_Settings for PCS-9705A/B/C ...................................................... 172
6.18 DC_Calbr_Settings for PCS-9705A/B/C ...................................................... 172
7 Human Machine Interface..............................................................173
7.1 Overview.......................................................................................................... 173
7.1.1 Design ................................................................................................................................. 173
7.1.2 Functionality........................................................................................................................ 173
7.1.3 Knob Keyboard.................................................................................................................... 174
7.1.4 LED indicators..................................................................................................................... 174
7.2 Understand the LCD Display ......................................................................... 175
7.2.1 Normal Display.................................................................................................................... 175
7.2.2 Alarm Display ...................................................................................................................... 175
7.3 Understand the HMI Menu Tree ..................................................................... 176
7.3.1 Overview.............................................................................................................................. 176
7.3.2 Analog.................................................................................................................................. 179
7.3.3 Status................................................................................................................................... 201
7.3.4 Records............................................................................................................................... 204
7.3.5 Settings................................................................................................................................ 206
7.3.6 Local_Cmd .......................................................................................................................... 206
7.3.7 Information........................................................................................................................... 207
7.3.8 Test...................................................................................................................................... 208

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7.3.9 Clock.................................................................................................................................... 210
7.3.10 Language........................................................................................................................... 210
8 Communication..............................................................................213
8.1 General............................................................................................................ 213
8.2 Ethernet Port Information.............................................................................. 213
8.2.1 IPAddress and Equipment Address of the Equipment....................................................... 213
8.2.2 Ethernet Standardized Communication Cable.................................................................... 213
8.2.3 Connections and Toplogies................................................................................................. 214
8.3 SCADA Communication................................................................................. 214
8.3.1 Overview.............................................................................................................................. 214
8.3.2 SCADACommon Functionality........................................................................................... 214
8.3.3 Behavior and Specific Treatments ...................................................................................... 214
8.3.4 Data Sent to SCADA........................................................................................................... 215
8.3.5 Data Sent to this Device...................................................................................................... 216
8.4 IEC61850 Interface.......................................................................................... 216
8.4.1 Overview.............................................................................................................................. 216
8.4.2 Communication Profiles...................................................................................................... 217
8.4.3 Server Data Organization.................................................................................................... 217
8.4.4 Server Features and Configuration..................................................................................... 221
8.4.5 ACSI Conformance.............................................................................................................. 223
8.4.6 Logical Nodes Table............................................................................................................ 227
8.5 DNP3.0 Interface............................................................................................. 230
8.5.1 Overview.............................................................................................................................. 230
8.5.2 Link Layer Functions........................................................................................................... 230
8.5.3 Transport Functions............................................................................................................. 230
8.5.4 Application Layer Functions................................................................................................ 231
9 Installation......................................................................................235
9.1 General............................................................................................................ 235

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9.2 Safety Instructions ......................................................................................... 235
9.3 Check Shipment ............................................................................................. 236
9.4 Material and Tools Required.......................................................................... 236
9.5 Device Location and Ambient Conditions.................................................... 236
9.6 Mechanical Installation .................................................................................. 237
9.7 Electrial Installation and Wiring .................................................................... 238
9.7.1 Grounding Guidelines ......................................................................................................... 238
9.7.2 Cubicle Grounding............................................................................................................... 238
9.7.3 Ground Connection on the Device...................................................................................... 239
9.7.4 Grounding Strips and their Installation................................................................................ 240
9.7.5 Guidelines for Wiring........................................................................................................... 240
9.7.6 Wiring for Electrical Cables................................................................................................. 241
10 Commissioning............................................................................243
10.1 General.......................................................................................................... 243
10.2 Safety Instructions ....................................................................................... 243
10.3 Commission Tools........................................................................................ 244
10.4 Setting Familiarization ................................................................................. 244
10.5 Product Checks ............................................................................................ 244
10.5.1 Check Version................................................................................................................... 245
10.5.2 Checking theAnalog input ................................................................................................ 245
10.5.3 Checking the Binary Signal Inputs.................................................................................... 246
10.5.4 Checking the Output Relays ............................................................................................. 246
10.5.5 Testing the Communication with SCADA.......................................................................... 246
10.5.6 Checking the Synchronism CB Closing............................................................................ 246
10.5.7 Interlocking Function Check (if used)................................................................................ 246
10.5.8 Checking the Adjustment of Transformer Tap Position..................................................... 246
10.5.9 Checking Clock ................................................................................................................. 246
10.5.10 Clock Synchronization Checking .................................................................................... 246
10.5.11 Power-fail Checking......................................................................................................... 246

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10.5.12 Switching from Local to Remote Control ........................................................................ 246
10.5.13 Final................................................................................................................................. 247
11 Maintenance .................................................................................249
11.1 Maintenance Schedule................................................................................. 249
11.2 Appearance and Wiring Check.................................................................... 249
11.2.1 Appearance Test................................................................................................................ 249
11.2.2 Wiring Test......................................................................................................................... 249
11.2.3 Jumper Check.................................................................................................................... 249
11.3 Input/Output Check ...................................................................................... 249
11.3.1 Alarms................................................................................................................................ 249
11.3.2 Binary Inputs...................................................................................................................... 250
11.3.3 Binary Output..................................................................................................................... 250
11.3.4 Analog Inputs..................................................................................................................... 250
11.3.5 Function Check.................................................................................................................. 250
11.4 Method of Repair .......................................................................................... 250
11.4.1 Replacing the Complete Device........................................................................................ 250
11.4.2 Replacing a Module........................................................................................................... 251
11.5 Cleaning ........................................................................................................ 252
11.6 Storage.......................................................................................................... 252
12 Decommissioning and Disposal .................................................253
12.1 Decomissioning............................................................................................ 253
12.1.1 Switching Off ..................................................................................................................... 253
12.1.2 Disconnecting Cables ....................................................................................................... 253
12.1.3 Dismantling........................................................................................................................ 253
12.2 Disposal......................................................................................................... 253
13 Manual Version History................................................................255

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1 Introduction
1.1 Application
PCS-9705 series bay control units (abbreviated as BCUs) are mainly applied to measurement and
control of data and signals for bay level of substation. They are object-orientedly designed under
the same hardware and software platform.
A typical application of PCS-9705 series BCUs in SAS is shown in the following figure.
Server A Printer
Station Level Server B Operator
Workstation
Optical Fiber
Engineer
Workstation
Protocol Converter
Third-Party IED,
Energy meters, DFR, etc
Circuit Breaker
Process Bus: SV, GOOSE Tripping/Binary Input, GMRP ， IEEE 1588
Station Bus: MMS, GOOSE( Interlocking),SNTP
Control
Centers(CC)
Circuit Breaker Controller
GPS Antenna
RCS-9785C/D
IEC60870-5-101,
IEC60870-5-104,
DNP3.0, etc.
RTU
RCS-9698G/H
Clock
Synchronization
Unit
Anti-maloperation
Workstation
(Optional)
RCS-9794A/B
BCU
Merging Unit
PCS-9700 HMI System
PCS-900 Series
Relay Protection PCS-9705
PCS-221 PCS-222 PCS-221 PCS-222
PCS-9250 Series
ECT/EVT
Bay Level
Process LevelMerging Unit
IEEE 1588
PCS-9881/PCS-9882
Optical Fiber
PCS-9250 Series
ECT/EVT
Circuit Breaker Controller
Protection Management Unit
(Optional)
Digital Relays
Remote Monitoring
System(DRRMS)
IEC60870-5-103
RCS-9798A/B
Circuit Breaker
PCS-9000 Series
Relay Protection
Ethernet Switch
PCS-9881/PCS-9882
Ethernet Switch
Figure 1.1-1 A typical application of PCS-9705 series BCUs in SAS
1.2 Function
PCS-9705 series BCUs have an object oriented design, i.e.: the user can find a proper sub-type of
bay control unit for an object inside the substation to be monitored and/or controlled. To achieve
this goal, some sub-type bay control units with different functions and/or different configurations
are founded under the same hardware and software platform; the following tables present the
details:
Table 1.2-1 Maximum configuration of PCS-9705
Hardware Configuration
PCS-9705A
PCS-9705B
PCS-9705C
Conventional sampling method:
AC analog inputs
5VT/4CT
13VT
8VT/7CT
IEC60044-8 digital sampling method
Optional
IEC61850-9-2 digital sampling method
Optional
DC analog inputs
8 or 16
8 or 16
8 or 16

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DC analog outputs
0
4
0
Binary inputs
6 fixed + 114 configurable (common negative supply)
(Not compatible with GOOSE mode)
Binary outputs
26 normal open binary outputs in 3 BO modules
Or :
52 normal open binary outputs in 6 BO modules
Synchronism
1
0
2
Interlocking criteria status output contacts
Optional
Up to 22 binary outputs(NO) in 2 BO modules for interlock logic
GOOSE functions
Optional
Optional
Optional
Note! Only one of the 3 optional sampling methods can be chosen at one time:
1) Conventional sampling method via AI module(e.g.:NR4402) equipped in slot 02 and slot 03.
2) IEC60044-8 digital sampling method via slot 02 AI(ECVT) module(e.g.:NR4201B).
3) IEC61850-9-2 digital sampling method via slot 03 NET-DSP module(e.g.:NR4136A).
Note! GOOSE function can be realized by slot 03 NET-DSP module(e.g.:NR4136A) or slot
09 GOOSE module(e.g.:NR4126A or NR4126C).
Note! 120 binary inputs are not compatible with GOOSE mode. When GOOSE module is
chosen, PCS-9705 can only support up to 100 binary inputs.
Table 1.2-2 Application of the PCS-9705
Device Type
Application
PCS-9705A
Circuit breaker.
Each side of Transformer.
Tap position acquisition/regulation of transformers
PCS-9705B
Common signals in the substation
Busbar.
PCS-9705C
Measurement and control of the middle/side circuit breakers of the circuit in 1½
CB arrangement.
Double branches for the low-voltage side of the main transformer
0.4kV substation-use transformer
Graphical representation of an electric single line diagram (abbreviated as SLD) is supplied to be
shown on the LCD display of PCS-9700 series BCUs.
1.3 Features
The devices make use of a fully-closed chassis with a complete panel, have completely

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separated spaces for electronic and electrical systems. The traditional motherboard wiring
mode is cancelled. At the same time, its software features corresponding anti-interference
measures which enhance their anti-interference capacity; and their electromagnetic radiation
also satisfy relevant standards.
PCS-9705 series BCUs make use of new PowerPC hardware platform, 16 bits parallel A/D
converter, 320*240 graphic dot matrix LCD, and real time multi-task operating system for
industrial purpose so as to realize high-capacity, high-precision, fast, real time information
processing. With high-precision parallel A/D converter, synchronization sampling can be
conducted for all the AC signals to ensure the accuracy of analog quantity measurement
which is up to the 15th harmonic component.
Software and hardware clock synchronization are both adopted with 1ms timing accuracy to
ensure the resolution of Sequence Of Events (abbreviated as SOE).
Large scale LCD provides graph and text HMI which makes operation convenient.
The devices are equipped with duplex Ethernet with 100M optical fiber or twisted pair cable.
The devices make use of back plug-in module structure. Electrical and electronic circuits are
strictly separated, which enhances EMC immunity performance.
Low power consumption and wide ambient temperature range.
PCS-9705 series BCUs support IEC61850, IEC60870-5-103 and DNP 3.0 protocols. Please
refer to the Chapter “Communication”for more details of these communication protocols.
1.4 Glossary
Table 1.4-1 Glossary
No.
Abbreviation
Description
1
ADisc
Disconnection of network A
2
AStorm
Storm of network A
3
BCU
Bay Control Unit
4
BDisc
Disconnection of network B
5
BStorm
Storm of network B
6
CB
Circuit Breaker
7
CC
Control Center
8
CT
Current Transformer
9
CMMI
Capability Maturity Model Integration
10
DS
Disconnector Switch
11
DSP
A Digital Signal Processor (DSP) is a specialized microprocessor with an architecture
optimized for the fast operational needs of digital signal processing.
12
e.g.
Exempli gratia:
Usually shortened in English to "for example" (see citation signal). Exempli gratia, "for
example", is commonly abbreviated as "e.g."; in this usage it is sometimes followed by a

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comma, depending on style.
13
E2PROM
Electrically Erasable Programmable Read-Only Memory
14
EIA
Electronic Industries Alliance
15
ELV
Extra-Low Voltage
16
ES
Earthing Switch
17
etc
Et cētera (etc) is a Latin expression that means "and other things", or "and so forth". It is
taken directly from the Latin expression which literally means "and the rest (of such things)".
"Et" means "and"; "cētera" means "the rest".
18
GAlm
Alarm signal for Generic Object Oriented Substation Event
19
GI
General Interrogation
20
GMT
Greenwich Mean Time (GMT) is a term originally referring to mean solar time at the Royal
Observatory in Greenwich, London. It is arguably the same as Coordinated Universal Time
(UTC) and when this is viewed as a time zone the name Greenwich Mean Time is
especially used by bodies connected with the United Kingdom, such as the BBC World
Service,[1] the Royal Navy, the Met Office and others.
21
GOOSE
Generic Object Oriented Substation Event
22
GPS
The Global Positioning System (GPS) is a space-based satellite navigation system that
provides location and time information in all weather, anywhere on or near the Earth, where
there is an unobstructed line of sight to four or more GPS satellites. It is maintained by the
United States government and is freely accessible by anyone with a GPS receiver. The
system imposes some technical limitations[clarification needed] which are only removed for
authorized users.
23
HMI
Human Machine Interface
24
i.e.
id est:
"That is (to say)" in the sense of "that means" and "which means", or "in other words", or
sometimes "in this case".
25
IEC
International Electrotechnical Commission
26
IED
Intelligent Electronic Device
27
IRIG
Inter-Range Instrumentation Group time code
28
ISO
International Organization for Standardization
29
LCD
A liquid crystal display (LCD) is a flat panel display, electronic visual display, or video
display that uses the light modulating properties of liquid crystals (LCs). LCs do not emit
light directly.
30
LED
Light-Emitting Diode
31
MMS
Manufacturing Message Specification
32
OHSAS
Occupational Health and Safety Assessment Series
33
PCB
Printed Circuit Board
34
PL
Process Level
35
PPS
A pulse per second (PPS) is an electrical signal that very accurately repeats once per
second (i.e. with a frequency of 1 Hertz). PPS signals are output by various types of
precision clocks, including atomic clocks, radio clocks and some models of GPS receivers.
Depending on the source, properly operating PPS signals have an accuracy ranging from a
few nanoseconds to a few milliseconds.

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36
PWR module
Power supply module
37
RAM
Random-Access Memory
38
ROV
Residual Over-voltage
39
RTU
Remote Terminal Unit (e.g.: RCS-9698G/H, it can also be called as “gateway”)
40
SAS
Substation Automation System
41
SBO
Select Before Operate
42
SCADA
Supervisory Control And Data Acquisition
43
SCSM
Specific Communication Service Mapping
44
SL
Station Level
45
SLD
Single Line Diagram
46
SNTP
Simple Network Time Protocol
47
SV
Sampled Values
48
SVAlm
Alarm signal for Sampled Values
49
TAL
Time Allowed to Live
50
TCP/IP
Transport Control Protocol/Internet Protocol
The Internet protocol suite is the set of communications protocols used for the Internet and
other similar networks. It is commonly known as TCP/IP from its most important protocols:
Transmission Control Protocol (TCP) and Internet Protocol (IP), which were the first
networking protocols defined in this standard. Modern IP networking represents a synthesis
of several developments that began to evolve in the 1960s and 1970s, namely the
precursors of the Internet and local area networks, which emerged during the 1980s,
together with the advent of the World Wide Web in the early 1990s.
51
UTC
Coordinated Universal Time (UTC) is the primary time standard by which the world
regulates clocks and time. It is one of several closely related successors to Greenwich
Mean Time. Computer servers, online services and other entities that rely on having a
universally accepted time use UTC for that purpose. If only limited precision is needed,
clients can obtain the current UTC time from a number of official internet UTC servers. For
sub-microsecond precision, clients can obtain the time from satellite signals. Time zones
around the world are expressed as positive or negative offsets from UTC, as in this list.
52
VT
Voltage Transformer
53
VTS
Voltage Transformer Supervision

1 Introduction
PCS-9705 Series Bay Control Units Instruction Manual
6
Date: 2012-06-12