Siemens SG8158-00 User Manual
TM
ISGS
Intelligent SwitchGear System
Operators Manualfirmware version V3
Manual No. SG8158-00
IMPORTANT
The information contained herein is general in nature and not intended for
specific application purposes. It does not relieve the user of responsibility to
use sound practices in application, installation, operation, and maintenance
of the equipment purchased. Siemens reserves the right to make changes
at any time without notice or obligations. Should a conflict arise between the
general information contained in this publication and the contents of drawings or supplementary material, or both, the latter shall take precedence.
QUALIFIED PERSON
For the purposes of this manual, a qualified person is one who is familiar
with the installation, construction, or operation of the equipment and the
hazards involved. In addition, this person has the following qualifications:
(a) is trained and authorized to de-energize, clear, ground, and tag cir-
cuits and equipment in accordance with established safety practices.
(b) is trained in the proper care and use of protective equipment such as
rubber gloves, hard hat, safety glasses or face shields, flash
clothing, etc. in accordance with established safety procedures.
(c) is trained in rendering first aid.
NOTE
These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible
contingency to be met in connection with installation, operation, or maintenance. Should further information be
desired or should particular problems arise which are not covered sufficiently for the purchasers purposes, the
matter should be referred to the local sales office.
The contents of the instruction manual shall not become part of or modify any prior or existing agreement, commitment or relationship. The sales contract contains the entire obligation of Siemens Energy & Automation, Inc.
The warranty contained in the contract between parties is the sole warranty of Siemens Energy & Automation, Inc.
Any statements contained herein do not create new warranties or modify the existing warranty.
Introduction
1
Table
of
Contents
Installation
User Interface
Hardware Configuration
Protective Function Configuration
Control & Communications
Data Acquisition
ISGS Wisdom Software
2
3
4
5
6
7
8
Trip Curves & Equations
Metering
Menu Structure
Acceptance Test Procedures
Schematics
Settings Worksheet
Glossary
A
B
C
D
E
S
G
Index
Siemens Energy & Automation, Inc.
I
Table of Contents
1 Introduction ...............................................1
1.1 About this Manual............................................. 1
1.2 Safety................................................................ 1
1.3 Product Description .......................................... 2
1.3.1 Standard Configuration......................... 2
1.3.2 Optional Configurations ........................ 3
1.4 Wisdom Software.............................................. 3
1.5 Technical Specifications ................................... 4
2 Installation .................................................5
2.1 Unpacking......................................................... 5
2.2 Storing............................................................... 5
2.3 Mounting ........................................................... 5
2.4 Wiring................................................................ 6
2.5 Communications............................................... 8
2.5.1 PC Communications (RS-232) ..............8
2.5.2 Network Communications (RS-485) ..... 8
2.6 Cradle Assembly............................................... 8
2.6.1 Removing .............................................. 8
2.6.2 Inserting ................................................ 8
3 User Interface............................................9
3.1 Keypad.............................................................. 9
3.2 Indicators .......................................................... 9
3.2.1 LEDs...................................................... 9
3.2.2 LCD ..................................................... 10
3.3 Password Protection....................................... 10
3.4 Menu ............................................................... 11
3.5 Standard Operating Procedures..................... 11
4 Hardware Configuration.........................15
4.1 Startup ............................................................15
4.1.1 Power On Display................................ 15
4.1.2 Power On Meter Display ..................... 15
4.2 Device Configuration ...................................... 16
4.3 Setting Binary Input Voltages.......................... 16
4.4 CT Configuration............................................. 18
4.5 VT Configuration ............................................. 18
5 Protective Function Configuration ........21
5.1 Overview ......................................................... 21
5.2 Instantaneous Phase Overcurrent (50)............ 21
5.3 High-Set Instantaneous Phase
Overcurrent (50HS) ......................................... 22
5.4 Instantaneous Neutral or Ground
Overcurrent (50N)............................................ 22
5.5 High-Set Instantaneous Neutral or
Ground Overcurrent (50HSN).......................... 22
5 Protective Function Configuration (cont.)
5.6 Phase Time Overcurrent (51)...........................23
5.7 Neutral Time Overcurrent (51N) ......................23
5.8 Blocking Capability for Breaker or
Interrupter Saving............................................ 24
5.9 Directional Phase Time Overcurrent (67).........24
5.10 Directional Neutral or Ground Time
Overcurrent (67N)............................................25
5.11 Overvoltage (59) ..............................................26
5.12 Undervoltage (27)............................................26
5.13 Phase Sequence Voltage (47) .........................27
5.14 Negative Sequence Voltage (47N) ..................27
5.15 Overfrequency (81O) ....................................... 28
5.16 Underfrequency (81U) ..................................... 28
5.17 Breaker Failure (50BF)..................................... 28
5.18 Demand Setpoints ..........................................29
5.19 Power Setpoints.............................................. 30
6 Control & Communications ................... 31
6.1 Matrixing Events to Outputs ...........................31
6.2 Binary Inputs ...................................................33
6.3 Binary Outputs ................................................33
6.4 Trip Contacts ...................................................34
6.5 Comm Events.................................................. 34
6.6 Breaker Monitoring..........................................34
6.7 Logs and Breaker Monitor Reset ....................35
6.8 Breaker Operations Count ..............................36
6.9 Hardware Status (Relay Data) ......................... 36
6.10 Self-Monitoring (Value Supervision) ................ 37
6.11 Parameter Sets ...............................................39
6.11.1 Active Set ............................................40
6.11.2 Default Set........................................... 40
6.11.3 Switching Sets ....................................40
6.11.4 Copying Sets.......................................40
6.12 Communications Port .....................................41
6.13 Passwords.......................................................41
6.14 Date and Time Setting ....................................41
7 Data Acquisition ..................................... 43
7.1 Event Log ........................................................43
7.2 Trip Logs ......................................................... 43
7.3 Min/Max Logs .................................................44
7.3.1 Current Minimum/Maximum Log ........44
7.3.2 Voltage Minimum/Maximum Log ........45
7.3.3 Power Minimum/Maximum Log ..........45
7.3.4 Frequency Minimum/Maximum Log ...45
Siemens Energy & Automation, Inc. i
Table of Contents
7 Data Acquisition (cont.)
7.4 Metered Data ..................................................46
7.4.1 Current Values .....................................46
7.4.2 Voltage Values .....................................46
7.4.3 Power Values....................................... 46
7.4.4 Frequency Values................................46
7.5 Meter Display ..................................................47
7.6 Waveform Capture .......................................... 47
8 ISGS Wisdom Software ..........................49
8.1 Overview .........................................................49
8.2 Setup...............................................................49
8.3 Menus .............................................................49
8.4 Demo Mode ....................................................51
A Trip Curves & Equations.........................53
A.1 Instantaneous Curve ........................................ 53
A.2 Standard Time Overcurrent Equation ..............53
A.3 Definite Inverse Equation .................................55
A.4 I-Squared-T Curve ...........................................56
A.5 Custom Protective Curve................................. 56
A.6 Over/Undervoltage Curves ..............................56
B Metering.................................................. 58
B.1 Accuracy ..........................................................58
B.2 Power Conventions..........................................59
C Menu Structure....................................... 60
D Acceptance Test Procedures ................ 63
E Schematics ............................................. 79
E.1 DC Trip System ................................................79
E.2 AC (Capacitor) Trip Systems............................80
Settings Worksheet
Glossary
Index
Service Request Form
ACCESS, CBPM, ISGS, SEAbus, WinPM, and Wisdom are trademarks of Siemens Energy & Automation, Inc. SIEMENS is a registered trademark of Siemens AG. All other brands and product names are trademarks of their respective companies.
ii Siemens Energy & Automation, Inc.
Introduction
1
1
1 Introduction
The Intelligent SwitchGear System (ISGS) from Siemens is
a high-speed, numerical, microprocessor-based protective
relay designed to be easily incorporated into a computermonitored medium voltage power system. The relay is
designed and manufactured in accordance with the latest
provisions of the applicable IEEE, ANSI, and NEMA standards. You must thoroughly read and understand this operators manual before you begin any work with the ISGS relay.
Successful application and operation of this equipment
depends as much upon proper installation and maintenance
by the user as it does upon the careful design and fabrication
by Siemens.
1.1 About this Manual
The purpose of this manual is to assist the operator in developing safe and efficient procedures for the installation, maintenance, and use of the equipment.
This manual provides the necessary information to safely
install, operate, configure, maintain, and troubleshoot the
ISGS relay. In addition, the manual offers worksheets for
parameter settings, acceptance test procedures, and troubleshooting. For quick reference, a complete menu structure,
metering accuracies, trip curves, equations, and schematics
are included in the appendix.
Contact the nearest Siemens representative if any additional
information is desired.
1.2 Safety
Qualified Person
For the purpose of this manual and product labels, a Qualified Person is one who is familiar with the installation, con-
struction, and operation of this equipment, and the hazards
involved. In addition, this person has the following qualifications.
Training and authorization to energize, de-energize,
clear, ground, and tag circuits and equipment in accordance with established safety practices
Training in the proper care and use of protective equip-
ment such as rubber gloves, hard hat, safety glasses or
face shields, flash clothing, etc., in accordance with
established safety procedures
Training in rendering first aid
Siemens Energy & Automation, Inc. 1
1
Introduction
Signal Words
The signal words Danger, Warning, and Caution used in
this manual indicate the degree of hazard that the user or
operator can encounter. These words are defined as follows:
Danger - indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury
Warning - indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury
Caution - indicates a potentially hazardous situation
which, if not avoided, could result in moderate or minor
injury
Required Procedures
In addition to normal safety practices, user personnel must
adhere to the following procedures:
1. Always work on de-energized equipment. Always deenergize a breaker or contactor, and remove it from the
equipment before performing any tests, maintenance, or
repair.
2. Always perform maintenance on equipment employing
springs after the spring-charged mechanisms are discharged.
3. Always let an interlock device or safety mechanism perform its function without forcing or defeating the device.
Field Service Operation
Siemens can provide competent, well-trained Field Service
Representatives to provide technical guidance and advisory
assistance for the installation, overhaul, repair, and maintenance of Siemens equipment, processes, and systems.
Contact regional service centers, sales offices, or the factory
for details.
1.3 Product Description
The ISGS relay is a general purpose, multifunction, microprocessor-based protective relay. It performs protection, metering, and monitoring for three phase current transformer (CT)
inputs and one ground CT input.
The ISGS relay provides two breaker tripping contacts and
one relay disabled (alarm) contact. The relay disabled contact
is a normally closed contact which opens when the relay is
functioning properly.
1.3.1 Standard Configuration
The ISGS relay base unit includes the following standard protection, metering, and monitoring features:
Instantaneous Phase Overcurrent (50) protection
Instantaneous Neutral or Ground Overcurrent (50N)
protection
Phase Time Overcurrent (51) protection
Neutral or Ground Time Overcurrent (51N) protection
ISGS
System
Pickup
Trip
Direct
Target
Reset
Pass
Addr
word
Trip
Target
Log
Reset
F
ISGS
Cat# C552-100V-5D0-000
VPSn120VAC/250VDC
IPH 5A IC 5A
Ser# Beta05HW15W2.XX
LR
7
4
1
Pass
word
Yes No
8
5
2
0
∞
Data Port
9
6
3
-/+
Enter
Figure 1.1 Intelligent SwitchGear System (ISGS) Relay
Nine selectable time overcurrent curves and one custom
curve
Breaker Failure (50BF) protection
Phase and neutral current as well as average current
metering
Minimum/maximum logs for storing metering data
Waveform capture
Trip log for recording information on last eight trip events
Event log for monitoring and recording relay functions
for status changes
2-line by 16-character liquid crystal display (LCD) for
viewing measured data
26-key membrane keypad for local access and selected
manual data entry.
LED indicators for general relay status information
Standard RS-232 communications port for local access
to all parameter settings using a personal computer (PC)
and Wisdom software
Password security
The ISGS relay is supplied in an M1-size drawout case with
dust tight front cover. The case is compatible with XLA connecting plugs that are commonly used to test relays.
2 Siemens Energy & Automation, Inc.
Introduction
1
1.3.2 Optional Configurations
The ISGS relay is a dynamic, feature-rich device that can be
used in numerous industrial and utility applications. It allows
the addition of options or configuration changes at any time
without discarding the basic hardware.
There are four optional configurations that can be added to
the ISGS relay base unit.
Metering
Adding metering to the ISGS relay provides the relay with
three inputs for the connection of VTs. Each input can be set
from 100 V to 120 V. These inputs extend metering capabilities as follows:
Rms and average rms voltages
Active and apparent power
Kilowatt demand and kilowatt demand hours
Power factor
Frequency
The installation of the voltage input card now also allows the
setting of these protective functions:
High-Set Instantaneous Phase Overcurrent (50HS)
High-Set Instantaneous Neutral or Ground Overcurrent
(50HSN)
The metering option is also a prerequisite for the next two
options: additional protective functions and remote communications.
Additional Protective Functions
For an ISGS relay with the metering option installed, the following additional protective functions offer a powerful extension of its protection capabilities:
Under/Overvoltage (27/59)
Phase Sequence Voltage (47)
Negative Sequence Voltage (47N)
Directional Time Overcurrent (67/67N)
Over/Underfrequency (81U/O)
Communications
Adding communications to the ISGS relay provides the relay
with an RS-485 port. Using the SEAbus communications
protocol, this port allows remote communications and control via the ACCESS electrical distribution and communication system (ACCESS system).
Communications allows configuration, measurement, and
protection functions to be performed or reviewed easily from
a remote location using Wisdom software.
1.4 Wisdom Software
While it is possible to completely set up and configure the
ISGS relay using the front panel keyboard and display, the
free Wisdom software package provided with the relay
reduces the complexity of configuring the relay, reading
metered values, and retrieving stored data. For more information on Wisdom software, refer to Chapter 8.
Siemens Energy & Automation, Inc. 3
1
Introduction
1.5 Technical Specifications
Applicable Standards
ANSI / IEEE C37.90-1989 IEEE Standard Relays and Relay
IEC 255-4 Single Input Energizing Quantity
General Technical Data
Operating ambient temperature -20°C to +55°C (-4°F to +131°F)
Storage temperature -40°Cto +75°C (-40°F to +167°F)
Relative humidity The average relative humidity
Altitude < 1500 meters
Frequency 50 Hz or 60 Hz, software select-
Power Supply AC/DC
DC Rated voltages 48 V (19-56 V),
Permissible ripple <10%
AC Rated voltage 120 V rms (102-132 V, 50-60 Hz)
Power consumption <15W
Input Circuit Ratings
Rated current (In) 1 or 5 A, independently for
Maximum input current 4 x In continuous
CT burden <0.1 VA for 1A CT
Rated voltage (Vn) 115 or 120 volts
Maximum input voltage for measurement: 1.25 x Vn
VT burden 150k
Tripping relays 2 or 3
Contact configuration
(Trip 1, Trip 2, Trip 3)
Contact rating IEEE/ANSI C37.90-1989, Sec-
Systems Associated With Electric Power Apparatus
Measuring Relays With Dependent or Independent Time
may be up to 55% outside of
enclosure for temperatures up to
40°C, with excursions up to
95% for a maximum of 96
hours, without condensation.
able
125 V (46-144 V),
250 V (92-288 V)
phase and ground inputs
10 x In for 10 s
100 x In for 1 s
<0.5 VA for 5A CT
MOV protected at: 2.5 x Vn
Ω
Trip Circuit
tion 6.7 (Make and carry 30 A for
at least 2000 duty cycles, resistive load, interrupted by independent means. Duty cycle:
200 ms on, 15 s off, 250 V)
Trip Circuit (continued)
Binary output contacts
(BO1 and BO2)
Maximum switching voltage 300 VDC, 250 VAC
Maximum switching current 8 A
Maximum switching capacity (for currents not interrupted by independent
means)
Trip source monitor 215 mA for 48 VDC supply
Applicable standards ANSI/IEEE C37.90-1989,
Between all circuits (except
communications interfaces, analog inputs and outputs) and
ground, and between these circuits.
Between communications interfaces, analog inputs and outputs
and ground, and between these
circuits
Across open contacts rated for
tripping
Across open contacts not rated
for tripping
Applicable standards IEC 255-4, IEC 255-5
For all circuits (except communications interfaces, analog
inputs and outputs), transverse
and common mode
RS-485 and local communications interfaces, analog I/Os
Electrostatic Discharge
Applicable standards IEC 801-2 (test without cover)
Contact discharge class 3, 6 kV
Air discharge class 3, 8 kV
Surge Withstand Capability
Applicable standards ANSI/IEEE C37.90-1989,
For all circuits except communications interfaces, analog
inputs and outputs
For RS-485 interface, analog
inputs and outputs
Electromagnetic Field
Applicable standards ANSI/IEEE C37.90.2
All six faces 10 V/m (+100%, -0%),
2 x N.O. (independent,
not rated for tripping)
DC: voltage dependent;
50 W at V
100 W at 48 VDC
270 W at 35 VDC
AC: 2000 VA
63 mA for 125 VDC supply
36 mA for 250 VDC supply
Source quality checked approximately every 4 minutes
Isolation
IEC 255-4, IEC 255-5
2 kV rms, 50/60 Hz, 1 minute
500 VDC, 1 minute
1500 V rms, 50/60 Hz, 1 minute
1000 V rms, 50/60 Hz, 1 minute
Impulse
class 3, 5 kV, 1.2/50
class 1, 0 kV
IEC 255-4, IEC 255-22-1,
IEC 41B (CO) 53
ANSI: Oscillatory and Fast Transient, transverse and common
mode
IEC: Class 3, 2.5 kV
IEC: Class 1, 0.5 kV
2-1000 MHz
≥70 VDC
µs, 0.5 J
4 Siemens Energy & Automation, Inc.
Installation
2 Installation
This chapter explains the installation of the ISGS relay and
includes procedures for unpacking, storing, mounting, and
wiring the relay. Prior to installation, ensure that the system
power is off and that you have all required tools and test
equipment available.
2.1 Unpacking
Upon receipt of the relay, inspect the carton for signs of damage. If the carton has been opened or damaged, carefully
inspect and verify the contents against the packing list. If
pieces are missing or damaged, contact the shipping agent
or your Siemens representative. Refer to Figure 2.1 to iden-
tify the different parts of the relay.
Note: To avoid damage to the relay, transport or
store the relay in the original packing material. Always transport the cradle assembly
inside the case.
.
2.3 Mounting
The ISGS relay is typically installed in a switchgear unit or
relay panel. The required panel opening and a side view of
the relay are shown in Figure 2.2.
5.69
14.63
(371.5)
7.31
(185.7)
(144.5)
2.84
(72.1)
7.13
(181.0)
4X .25 (6.4) DIA
14.25
(362.0)
2
Figure 2.1 Case, Cradle, Paddles, and Cover of ISGS Relay
2.2 Storing
Extended storage of the relay should adhere to the following
guidelines:
Store the relay in a clean, dry location in the original
packing material
Storage temperature range is -40°F to +167°F
(-40°C
to +75°C)
Note: This device contains electrolytic capacitors,
which can degrade over time when stored
at temperatures over 86°F (30°C). Take care
not to store the relay at high temperatures
for extended periods.
After extended storage, connect the relay to its auxiliary voltage source for one or two days prior to taking it into actual
service. This serves to regenerate the electrolytic capacitors
of the auxiliary supply.
(77.0)
6.06
(154.0)
6.19
(157.2)
(7.9)
7.06
(179.4)
7.06
(179.4)
(7.9)
MOUNTING PANEL
Figure 2.2 Mounting Dimensions
3.03
.31
.31
.63
(16.0)
.63
(16.0)
10-32
SCREWS
10-32
SCREWS
Siemens Energy & Automation, Inc. 5
Installation
2
Mount the relay using the following steps.
1. Install the relay M1-type case in the panel opening on
the switchgear equipment.
2. Connect the case ground to the terminal lug on the
back of the M1-type case as shown in Figure 2.3.
3. Wire as described in Section 2.4.
Use toothed washers to
ensure solid metal contact
through paint of cover and
panel
Case ground, #12
or braided cable to
good cubicle ground,
as short as possible
IMPORTANT:
Any unused terminals must remain disconnected. They are for factory use only.
Relay Disabled 2
Relay Disabled 1
Impedance Sense
Impedance Source
Ground Monitor
BI Trip
BI B Switch
Power Input +
Power Input -
Top
BI1A 21
BI1B 22
BI2A 23
BI2B 24
BI3A 25
BI3B 26
BI4A 27
BI4B 28
Trip 3A 29
Trip 3B 30
19
20
17 15 13 11
18 16 14 12
41 VT1+
42 VT143 VT2+
44 VT245 VT3+
46 VT347 NC (unused)
48 SEAbus Signal +
49 SEAbus Signal 50 SEAbus Ref
Trip 2
Figure 2.3 Case Grounding
2.4 Wiring
Wire the ISGS relay after the case is installed. Connect the
wiring to the applicable terminals to support the desired features. Refer to Figure 2.4 for terminal locations. Figure 2.5
shows the internal connections of the ISGS relay. To avoid
injury to personnel or the equipment, perform power connections after all other wiring has been completed.
Assure that all power is off before performing any wiring. Terminals 1 through 20 accept ring-tongue or forked spade terminals and are suitable for 14 AWG to 10 AWG wire.
Terminals 21 through 60 are for directly inserting the appropriate wire and are suitable for 22 AWG to 14 AWG wire.
Communications connections made to terminals 48 to 50
require shielded twisted pair wire.
CT connections should be made with the polarity end of the
CT connected to current terminal marked with an asterisk (*).
BO1A 31
BO1B 32
BO2A 33
BO2B 34
AI1+ 35
AI1- 36
AI2+ 37
AI2- 38
AO1+ 39
AO1- 40
9
10
CTN-2
7531
8642
CTN-1*
CT3-2
CT3-1*
Figure 2.4 Terminal Locations
Case Ground
CT2-2
CT2-1*
CT1-2
CT1-1*
Trip 1
Trip Common
6 Siemens Energy & Automation, Inc.
Current
Input
Voltage
Input
BI B Switch
CT 1-1
CT 1-2
CT 2-1
CT 2-2
CT 3-1
CT 3-2
CT N-1
CT N-2
VT 1+
VT 1VT 2+
VT 2-
VT 3+
VT 3-
Installation
2
ISGS
3
4
5
6
7
8
9
10
41
42
43
44
45
46
14
2 Trip 1
Trip Common
1
11
Trip 2
29
Trip 3
30
Relay Disabled 1
19
20
Relay Disabled 2
31
BO 1
32
33
BO 2
34
Binary
Outputs
Trip
Relays
Relay Disabled
Alarm Contact
Breaker and
Trip Source
Monitor
BI Trip
Impedance Source
Impedance Sense
Ground Monitor
1
Binary
Input
Power
Supply
2
3
4
V
H
Communications
In
Data +
RxD
15
17
18
16
+
21
-
22
+
23
-
24
+
25
-
26
+
27
-
28
13
12
48
(3)
DC
DC
RS-485 SEAbus
RS-232
Front Panel
Communications
Out
49
Data -
50
Reference
(2)
TxD
(7)
Reference
Ground
+
-
Figure 2.5 Internal Connections
Note: The relay disabled contact should be wired to plant-wide distributed control system or external alarm.
Siemens Energy & Automation, Inc. 7
Installation
2
2.5 Communications
The ISGS relay must be connected to a host computer in
order for it to communicate with other devices. The relay
supports both RS-232 and RS-485 (optional) data interfaces. The use of either of these data interfaces will allow the
same level of access to the system as the front panel keypad, but configuration through communications does not
require a password.
The next section describes the connection to the interfaces.
For more information about operating the ISGS relay via the
data interfaces, refer to the documentation for the communications software, such as WinPM or Wisdom. Keypad
operations are described in Chapter 3.
2.5.1 PC Communications (RS-232)
The RS-232 interface (front port) is intended only for shortterm connections to a portable computer. Use this interface
to perform initial setup or to read the ISGS relay data logs or
waveform buffers using an appropriate software program. To
connect your PC to the front port, follow these instructions:
1. Remove the relay case front cover.
2. Locate the RS-232 connector on the front panel of the
cradle assembly.
3. Connect the PC to the front panel RS-232 port using a
standard DB-9 serial port connection cable (DB-9 male
to DB-9 female or DB-25 female depending on the type
of port on the computer). This connection does not
require the use of special adapters or a null-modem
cable.
2.5.2 Network Communications (RS-485)
The optional RS-485 interface (rear port) allows remote communication over a shielded twisted pair wire at distances of
up to 4000 feet. Use this interface together with an appropriate software program for remote monitoring and control of
the ISGS relay.
To connect the ISGS relay to your communications system,
follow these instructions:
1. Locate the RS-485 connector on the rear of the M1
case.
2.6 Cradle Assembly
Some of the setup and maintenance procedures in this manual require removal of the relay cradle assembly from the
drawout case. Use the following instructions for the proper
removal and insertion of the cradle assembly.
IMPORTANT:
The relay module contains CMOS circuits. Electrostatic discharges into or around the relay cradle or
any of its components must be avoided. Use
grounding straps or touch a grounded metal surface before handling the relay cradle.
2.6.1 Removing
Use the following procedure to remove the cradle assembly
from the case:
1. Remove the relay case front cover.
2. Remove the top and bottom connecting plugs
(paddles).
3. Loosen the cradle assembly by pulling the top release
lever to the left and the bottom release lever to the right
until the assembly ejects from the case.
4. Grasp the cradle assembly by the edges of the front
panel and pull it out of the drawout case.
5. Place the cradle assembly on an anti-electrostatic surface and perform the desired work.
2.6.2 Inserting
Use the following procedure to insert the cradle assembly
into the drawout case:
1. Insert the cradle assembly until the release levers come
in contact with the protrusions on the case.
2. Position the top and bottom release levers until the slots
on the levers align with the protrusions on the case.
3. Use the release levers to finish inserting the cradle
assembly into the case. Apply pressure to the cradle
assembly front panel until the assembly fully seats in the
case.
2. Use shielded twisted pair wire to connect pins 48, 49,
and 50 to your electrical distribution system.
To connect the ISGS relay to your PC via the rear port
directly, use an RS-232 to RS-485 converter.
via modem, use an RS-232 to RS-485 converter and a
null modem.
8 Siemens Energy & Automation, Inc.
4. Insert the top and bottom paddles.
5. Check for proper insertion of the cradle assembly by
seeing if the expected measured values are observed on
the relay display.
6. Install the front cover.
User Interface
3 User Interface
Operation, parameter selection, and control of the ISGS relay
are performed using the front panel controls and indicators.
They consist of a 26-key membrane keypad, a 2-line by
16-character liquid crystal display (LCD), three light-emitting
diodes (LEDs), and the front port.
3.1 Keypad
The relay can be controlled via the keypad, the front port, or
the optional rear port. This manual covers only keypad operations. For information about communicating with the ISGS
relay via the data ports, refer to the documentation supplied
with the communications software (WinPM or Wisdom).
The ISGS relay keypad allows access to any relay information or function for display or parameter changes where
applicable. The keypad consists of 26 keys. Table 3.1 pro-
vides a detailed description of each key type.
To access relay information or functions for display or modification, use the Arrow keys to scroll through relay addresses
or use the Direct Addr key and the specific address number
to go directly to the information or function.
Use the Double Arrow keys to scroll through the address
blocks and use the Single Arrow keys to scroll within an
address block.
3.2 Indicators
The indicators on the front panel display consist of three
LEDs and a two-line LCD.
.
Key Name Function
Password Accesses the password function,
Direct Addr
l
Trip Log Displays the trip log.
Target Reset Resets the Trip LED.
Double Arrow Scrolls through the address
Single Arrow Scrolls through the addresses
F Saves new settings when followed
Numeric Used to enter an address number
which is required for programming
relay settings.
Allows direct entry of addresses.
blocks.
within an address block.
by Enter, enters or exits subaddress level, or switches to alternate parameter set when followed
by 1 or 2 and Enter.
after pressing Direct Addr, or to
enter a numeric setting.
3
3.2.1 LEDs
The LED indicators are used to provide general status information, which alerts the operator to an event or problem and
prompts the operator to use the LCD to review the logs for
more detailed information. The three LEDs and their functions are listed below.
LED Color Function
System Green Denotes the relay is operating properly
(always on when relay is in service).
Pickup Red Denotes a protective function is in
pickup.
Trip Red Denotes a protective function or
remote command has initiated a trip.
Both the Pickup and the System LED operate automatically
and do not require a reset.
The System LED remains on as long as power is applied
and the relay is functioning properly.
The Pickup LED is illuminated as long as a protective
function is in pickup.
Decimal Point Indicates a decimal point or the
separation between month, day,
and year, or between hours, minutes, and seconds.
Plus/Minus Toggles between positive and
negative values.
Backspace Deletes one character to the left or
selects backwards.
Infinity Programs the setting to the high-
est possible value.
Enter Chooses the setting option, enters
a setting value, or confirms the
address entered after pressing
Direct Addr.
Yes Accepts the displayed setting, or
replies yes to the displayed
prompt.
No Rejects the displayed setting,
allows entry of a numeric setting,
replies No to the displayed
prompt, or selects forward.
Table 3.1 Front Panel Keys
Siemens Energy & Automation, Inc. 9
User Interface
3
The Trip LED is illuminated until the Target Reset key is
depressed. Reset the Trip LED by momentarily depressing
the Target Reset key.
Note: If the Trip LED is on and power is removed, it
will still be set to on when power is restored.
3.2.2 LCD
The two-line by sixteen-character LCD allows the viewing of
parameters, measured data, and keypad entries. The LCD
also displays messages returned by events such as a relay
going into pickup.
Whenever a relay goes into pickup, in addition to lighting the
pickup LED, the LCD shows a message that indicates which
protection element is in pickup. A pickup message is displayed as follows:
PICKUP FFF Pxxxx
MM/DD hh:mm:ss
In this message
FFF is the two or three character ANSI pro-
tection code number, for example, 50,
or 50N.
xxxx is a sequence of the characters 1, 2, 3,
and/or N, indicating which phase or
combination of phases and neutral
have picked up.
MM/DD hh:mm:ss is the date and time of the event.
Level 3 includes additional access to all matrixing, the
changing of which can cause a device reset.
Password configuration is described in Section 9.4.
To access any password protected information or function,
either first enter the password (up to five digits) and then go
to the desired address, or first access the address block and
then enter the password as described in the following steps:
1. Press the Password key. The password dialog box
appears.
Password:
2. Enter a password (00000 to 99999) using the number
keys from the keypad. The LCD displays each digit
entered as an @ symbol.
Password:
@@@@@
3. Press the Enter key after completing the entry.
4. If a correct password has been entered, the dialog box
displays a confirmation message that depends on the
level password that was entered.
Password:
User PW Three OK
These messages are displayed until superseded by another
pickup, a trip message, a target reset, or a request by the
operator to display other information.
3.3 Password Protection
A password should be used to prevent any accidental or
unauthorized parameter changes. While relay information
can be accessed for display without a password, all changes
to parameter settings require a user password.
Note: The ISGS relay is not password protected
when making parameter changes through
Wisdom software.
The ISGS relay offers three password protected access levels:
Level 1 consists of simple settings such as all protective
and setpoint settings that do not cause a reset.
These simple settings include communications
and time and date settings.
Level 2 consists of protective function settings such as
CT and VT ratios, the changing of which can
cause a device reset.
For a level 1 or level 2 password, the word Three in the
illustration above would be replaced by One and
Two, respectively.
If the wrong password has been entered, the dialog box
displays the following message:
Password:
Rejected
5. When the confirmation message appears, press the
Enter key. This action returns the display that was in
use before entering the password.
For example, if the address block of the parameter to be
changed was displayed prior to entering the password,
the display returns to this address block and the device
is ready to accept changes.
10 Siemens Energy & Automation, Inc.
User Interface
3.4 Menu
The ISGS relay menu (or memory map) is organized in a hierarchical structure that is made up of address blocks and
addresses. The first level consists of address blocks. Each
address block represents one complete function or two
related functions and is identified by a unique four-digit number ending in two zeros (for example, 1500). Refer to
Figure 3.1.
The second level consists of individual addresses confined to
an address block. Each address represents a part of a functionthe changeable parameteror the measured value of
a displayed parameter. The parameter is identified by a
unique four-digit number that consists of the first two digits
of the address block and two digits indicating the parameters number within the address block (for example, 1502).
Refer to Figure 3.1.
Block Function Address Parameter
A1500 Instantaneous
Phase Overcurrent
(50)
High-Set Instantaneous Phase Overcurrent (50HS)
A1900 Directional Phase
Time Overcurrent
(67)
A2200 Overvoltage (59) --- ---
Figure 3.1 Example of Menu Structure Displaying Address
Blocks with Two Related Functions, an Individual Function,
and an Unavailable Function.
A complete ISGS relay menu with parameter listing is provided in Appendix C. The various parameter settings are
shown in the respective section describing the complete
function.
1501
Function 50
1502
Pickup 50
1504
Delay 50
1510
Freeze Wfm 1 50
1511
Freeze Wfm 2 50
1512
Block 50
1551
Function 50HS
1552
Pickup 50HS
1560
Freeze Wfm 1 HS
1561
Freeze Wfm 2 HS
1901
Function
1902
Curve
1903
Pickup
1905
Time Dial
1906
Filter
1907
Impedance
1908
Direction
1910
Freeze Wfm 1
1911
Freeze Wfm 2
The LCD identifies functions that include parameters configurable for A and B settings by preceding the functions
address block number with the letter A or the letter B,
depending on which parameter set is currently displayed.
Refer to Figure 3.2.
3
A1500 Instantaneous
Phase Overcurrent 50
Figure 3.2 LCD Display of a Function that Includes
Parameters Configurable for A and B Settings.
In addition, when scrolling through the individual parameters
of an ISGS relay, the LCD identifies each parameter that is
configurable for A and B settings by preceding the parameters address number with the letter A or the letter B,
depending on which parameter set is currently displayed.
Refer to Figure 3.3
A1502 Pickup 50
110A
Figure 3.3 LCD Display of a Parameter that is Configurable
for A and B Settings
When accessing the ISGS relay menu through the keypad,
the Arrow keys allow scrolling through all available functions
and parameters. If an option is not installed, the LCD only
displays the address block that is reserved for this option. In
this case, second level addresses are not available.
3.5 Standard Operating Procedures
Before attempting to display or configure any of the relay
data, ensure that the relay has control power which is indicated by the system LED (green) being lit.
The steps for displaying data, configuring parameters, saving
data, and switching to the alternate parameter set for either
display or configuration are described in detail in Table 3.1,
Standard Operating Procedures.
Only certain protective function parameters have two settings. All A settings are grouped under parameter set A, and
all B settings are grouped under parameter set B. Each
parameter set automatically includes all the regular parameters that can be programmed to only one setting at a time
and, therefore, apply to both sets. Examples are protective
function enable settings and matrixed output contacts such
as waveform buffers and blocking. For more information on
parameter sets, refer to Section 6.11.
Siemens Energy & Automation, Inc. 11
3
User Interface
Displaying function names (address blocks), parameter
names and their settings or values (addresses), and subparameter settings (subaddress, where applicable), does not
require a password (except for viewing the password itself).
Data can be displayed by following steps 1 to 3 of the standard operating procedures described in Table 3.1. Viewing
passwords requires the entry of an appropriate level user
password (refer to Section 3.3 for more information on
passwords).
Configuring parameters requires a password. Use steps 1
and 2 or steps 1 to 3 to display the desired parameter or its
subparameters. Continue with step 4 to make changes to
this parameter or subparameter.
When leaving a function or before scrolling to the waveform
parameters of the same function, the relay prompts to indicate the end of the password operation and whether the
changes made so far shall be saved. When the message
End of Password Operation ? appears, press the Ye s key
to continue to the next function. Press the No key to scroll
back through the parameters of this one function. Pressing
the Ye s key returns the message SAVE NEW SETTINGS ?.
Press the Yes key again to save the settings, or press the No
key to abort any changes made after the last saving procedure.
12 Siemens Energy & Automation, Inc.
Table 3.1 Standard Operating Procedures
Step Task Description
Display Data
1 Display data at
Address Block
(xx00)
Use Double Arrow keys to scroll forward or backward between address blocks.
OR
Press Direct Addr key; enter address of desired address block using the numeric keypad; press Enter key.
To view passwords, carry out step 4 before continuing with the next step.
User Interface
3
2 Display data at
Address
(xxxx)
3 Display data at
Subaddress
(0xx)
4 Enter Password Press Password key; enter the password; press Enter key twice to return to screen displayed last before
5 Configure at
Address
(xxxx)
6 Configure at
Subaddress
(0xx)
Use Single Arrow keys to scroll forward or backward between parameter addresses.
Skip step 3 if function has no subaddresses.
OR
Press Direct Addr key; enter address of desired parameter using the numeric keypad; press Enter key.
Skip step 3 if function has no subaddresses.
Press F key once to enter subaddress level; use Single Arrow keys to scroll forward or backward between
subaddresses.
Press F key again to return to address level.
Configure Parameters
password entry.
Leaving an address block, leaving a function within an address block, or before scrolling to the waveform
parameters within a function prompts for renewed password entry.
For password levels, proper password entry, and display messages, refer to Section 3.3.
Display cursor is blinking (otherwise repeat step 4).
Change displayed value by entering a new value using the keypad. Press Enter key.
Change displayed selection by pressing the No key to scroll forward through options until desired option
appears. Press Enter key.
Skip step 6 if function has no subaddresses.
Press F key once to enter subaddress level; use Single Arrow keys to scroll forward or backward between
subaddresses.
Change displayed selection by pressing No key to scroll forward through options until desired option appears.
Press Enter key.
Press F key again to return to address level.
Save Changes
7 Enter Save
Procedure
Undo Changes To abort any changes made, press No key. After message SAVING PROCEDURE ABORTED appears,
Save Changes To save settings and reset relay to new parameters, press Yes key followed by Enter key. After message
8 Switch
Parameter Set
9 Display/Config-
ure Alternate
Parameter Set
Press F key. At the blinking cursor position, the letter F is displayed. Press Enter key. Message SAVE NEW
SETTINGS? appears.
press Enter key to return to screen displayed last before aborting settings.
Settings can be undone any time while still in the same function by simply returning to the parameter and
assigning a new value.
NEW SETTINGS SAVED appears, press Enter key to return to screen displayed last before saving settings.
Leaving an address block, leaving a function within an address block, or before scrolling to the waveform
parameters within a function prompts for the saving of the function settings.
Switch Parameter Set
Press F key followed by either 1 (for normal settings) or 2 (for alternate settings) on the numeric keypad.
The message PARAMETER SET COPIED TO EDIT appears. Press Enter key.
Display shows address block (xx00) with either A or B prefix in address (Axx00 or Bxx00).
A indicates parameter set 1; B indicates parameter set 2.
Repeat steps 1 to 3 or steps 1 to 7 to display or configure the alternate parameter set.
Siemens Energy & Automation, Inc. 13
3
Notes:
14 Siemens Energy & Automation, Inc.
Hardware Configuration
4 Hardware Configuration
This chapter explains the device startup and how to configure the basic ISGS relay parameters. The relay must be configured with certain system parameters, such as phase
sequence and frequency. In addition, information regarding
the manner in which the ISGS relay is connected in the
installation must be configured.
All parameter changes require a password. Refer to
Section 3.3 for instructions on how to enter your password.
Viewing parameter settings does not require a password.
Note: The ISGS relay is not password protected
when making parameter changes through
Wisdom software.
Perform parameter changes using steps 1 through 9 of the
standard operating procedure described in Section 3.5.
4.1 Startup
Block Function Address Parameter
0000 Power On/
Configuration
Display
This section describes the content of address block 0000
represented by the initial Power On display and the initial
Power On Meter display.
When the relay is powered on, following a brief hardware initialization check, the green System LED illuminates and the
LCD shows the contents of address 0000. First, the Power
On display indicates your relay configuration. After approximately five seconds, the Power On display is replaced by the
Power On Meter display showing two values. Prior to placing
the relay in service, verify that the correct relay configuration
was preloaded at the factory. To return to the Power On display, press the Direct Addr key and key in 0000 followed by
the Enter key.
4.1.1 Power On Display
The two lines of the Power On display indicate your relay
configuration. Line 1 contains the function address 0000 and
the relays firmware version. Line 2 identifies the relays catalog number which depends on the options you ordered with
your relay (see Figure 4.2 for catalog numbers).
Reading from left to right in Figure 4.1, line 1 shows the
address block 0000 and the ISGS firmware version
ISGS-3V3.00. Line 2 displays the catalog number
D553100VSDF00000. The first character of this number, D,
indicates a 120 VAC power supply, the fourth character, 3,
voltage inputs for energy metering, and the eighth through
eleventh characters, VSDF, indicate Under/Overvoltage pro-
tection, Negative Sequence Voltage protection, Directional
Overcurrent protection, and Under/Overfrequency protection, respectively.
--- ---
0000 ISGS-3V3.00
D553100VSDF00000
Figure 4.1 Power On Display
123 4567 891011 121314
-
ISGS
Nominal Supply Voltage
48 VDC
125 VDC
120VAC
250VDC
Phase CT Secondary
Rating
1A
5A
Neutral or Ground CT Rating
1A
5A
Voltage Inputs, Power Metering,
RS-485 Communications
Without
With
Additional I/O
Without
With
*
Under/Overvoltage Protection (27/59),
Negative Sequence Voltage Protection (47/47N),
Directional Overcurrent Protection (67/67N),
Under/Overfrequency Protection (81 U/O)
Without
With
*
* Voltage Inputs required.
A
B
D
E
1
5
1
5
00
31
0
I
0000
VSDF
---
0 0 00
Figure 4.2 Relay Configuration (Catalog Number)
4.1.2 Power On Meter Display
The Power On Meter display consists of two measured values. The default setting for Line 1 displays average current,
and Line 2 shows average current demand. The type of
default values displayed can be changed in address block
7000, Operating Parameters, described in Chapter 7.
Iavg = xx A
Idmdavg = xx A
Figure 4.3 Power On Meter Display
The Power On Meter display is replaced with other information anytime an event message is displayed or the LCD is
used to set parameters or check logs. To return the LCD to
the Power On Meter Display, press the Trip Log key followed
by the Target Reset key.
4
Siemens Energy & Automation, Inc. 15
Hardware Configuration
4
4.2 Device Configuration
The Device Configuration function allows you to set up the
ISGS relay to match line frequency, phase sequence, and
breaker connection settings of your system.
4.3 Setting Binary Input Voltages
Binary inputs are jumpered to correspond to the auxiliary
supply voltage of the relay in which they are installed. The
inputs will correctly respond to DC or AC depending on the
jumpering. The jumpers can be placed to allow the inputs to
work with any of the available voltages, independent of the
auxiliary supply voltage. Refer to Figure 4.5 and Table 4.1.
13
ISGS
Relay
125 VDC Bus
21
BI 1
22
12
Figure 4.4 Binary Inputs Independent of Supply Voltage
Table 4.1 lists the possible jumper positions for setting
binary input voltages. The numbers in this table each refer to
a pin from and to which a jumper can be moved.
Table 4.1 Jumper Positions
120 VAC
Aux Relay
120 VAC Source
to be Monitored
1000 Device Configuration
Address Parameter Options
1002 Frequency 50Hz or 60Hz
1003 Phase Sequence 123 (ABC) or 132 (ACB)
1004 Breaker
Connection
1005 Trip Time 0.01-32.00 s (0.01 s steps)
Trip 1, Trip 2, Trip 3, Trip 1 & 2,
Trip 1 & 3, Trip 2 & 3, or
Trip 1 & 2 & 3
The frequency parameter (1002) must be set to the nominal
frequency of your system. Phase sequence (1003) selects
the phase sequence of your system as it enters the ISGS
relay. The breaker connection parameter (1004) selects the
trip contact that your breaker is connected to. Many functions use this parameter to determine if the device is
attempting to open the breaker. Breaker failure can be initiated by either one of the three trips (if the Breaker Failure
function is enabled). The default is set to Trip 1.
Voltage
Supply
48 V X111-X112 X23-X22 X34-X35 X46-X47
125 V
(Default)
120 VAC X110-X111 X24-X23 X35-X36 X47-X48
250 VDC X111-X112 X23-X22 X34-X35 X46-X47
h
BI 1
Te rm in a ls
21/22
X13-X14 X25-X26 X37-X38 X49-X50
X16-X17 X28-X29 X40-X41 X52-X53
X19-X20 X31-X32 X43-X44 X55-X56
X111-X112 X23-X22 X34-X35 X46-X47
X13-X14 X25-X26 X37-X38 X49-X50
X17-X18 X29-X30 X41-X42 X53-X54
X19-X20 X31-X32 X43-X44 X55-X56
X14-X15 X26-X27 X38-X39 X50-X51
X17-X18 X29-X30 X41-X42 X53-X54
X20-X21 X32-X33 X44-X45 X56-X57
X14-X15 X26-X27 X38-X39 X50-X51
X17-X18 X29-X30 X41-X42 X53-X54
X19-X20 X31-X32 X43-X44 X55-X56
BI 2
Terminals
23/22
BI 3
Terminals
25/26
BI 4
Te rm in a ls
27/28
16 Siemens Energy & Automation, Inc.
Hardware Configuration
Figure 4.5 shows option board 2 and its jumpers. The drawing indicates the jumpers associated with each binary input.
The enlarged set of pins shows an example of pin labeling
and a jumper at location X17-X18.
350
350
350
350
Changing Jumper Positions
IMPORTANT:
The relay module contains CAMS circuits. Electrostatic discharges into or around the relay cradle or
any of its components must be avoided. Use
grounding straps or touch a grounded metal surface before handling the relay cradle.
1. Remove the cradle assembly from the case as
described in Section 2.6.1.
2. Set the relay on its back.
3. With a small screwdriver, remove the four screws (on the
sides of the relay) that hold the front panel to the relay
cradle.
4. Lift the front panel and hang it in the slots provided on
the left side of the casing. Take care not to damage the
ribbon cables that connect the electronics in the cradle
to the front panel electronics.
5. Disconnect the two ribbon cables from the main board
and the option board 2. The main board is the center
board which is screwed to the option board 2 on its
right.
6. Withdraw these two attached boards and set them on
the workplace with the jumper side up (see Figure 4.5).
7. Each jumper is pushed over two out of three pins. Each
pin is labeled with numbers identical to those in
Tab l e 4 . 1. The numbers of two side-by-side pins represent a possible jumper position.
4
.22 163 .22 163 .22 163 .22 163
Figure 4.5 Option Board 2 with Binary Inputs
8. With a small needle nose pliers, lift the desired jumper
off of its pins and push it down over another two pins of
the same set.
Example: In Figure 4.5, the jumper is over pins X17
and X18, a default setting for a 125 V power supply. For
a 48 V power supply, set this jumper to X16-X17.
Repeat this step until all desired jumpers are repositioned.
9. Insert the attached boards back into the cradle. The
connectors of each board must snap into the terminals
of the casing.
10. Reattach the two ribbon cables to the main board and
the option board 2.
11. Unhook the front panel and carefully place it over the
cradle. Lift the front panel slightly to make sure that the
ribbon cables connected to the front panel are positioned in their assigned space to prevent damage.
12. Insert and tighten the four front panel screws.
13. Insert the cradle into the casing as described in
Section 2.6.2.
Siemens Energy & Automation, Inc. 17
4
Hardware Configuration
4.4 CT Configuration
The CT Configuration function allows you to set up the ISGS
relay to match the phase CT primary rating, the neutral or
ground CT primary rating, and the CT inputs normal power
flow setting of your system. For CT connections refer to
Figure 4.8.
Main Bus
ISGS
ISGS
Power
Normal Power Flow
(Into CT Polarity Mark)
Figure 4.6 Normal/Reverse Power Flow
(Out of CT Polarity Mark)
Power
Reverse Power Flow
4.5 VT Configuration
Use this address block to configure the ISGS relay to match
the VT primary rating and the VT connection setting for your
system. These settings are available only if the voltage input
option is installed on the relay.
1100 CT Configuration
Address Parameter Options
1101 Phase CT Primary
Rating
1102 Neutral or Ground
CT Primary Rating
1104 Power Flow Normal or Reverse
The phase (1101) and neutral/ground (1102) CT primary ratings are independently configurable. However, when a residual sensing method is used for ground fault protection, the
primary current ratings for the neutral CT and the phase CT
must be equal. The CT secondary ratings (1A or 5A) are set
at the factory and are not changeable from the front panel.
Power flow is also referred to as top feed or bottom feed. If
the power enters the polarity mark on the CTs, set the Power
Flow parameter (1104) to Normal. If power leaves the polarity
mark, enter Reverse. Figure 4.6 illustrates examples of nor-
mal and reverse power flow.
18 Siemens Energy & Automation, Inc.
5-8000 A (1 A steps)
5-8000 A (1 A steps)
Hardware Configuration
1200 VT Configuration
Address Parameter Options
1201 Primary Rating 120-138,000 V (1 V steps)
1202 VT Connect Line-to-Line or Line-to-Neutral
1203 Sec. VT Rating 100-120 V (1 V steps)
Voltage transformers may be connected in either of two
ways:
Two VTs connected open delta-open delta
Three VTs connected wye-wye
For brevity, the open delta connection is referred to as L-L
(line-to-line), while the wye connection is referred to as L-N
(line-to-neutral). Wye-delta or delta-wye connection of VTs is
not allowed. Figure 4.7 shows the correct VT connections
and polarities.
Voltage transformers are specified with an input to output
voltage ratio (for example, 12000:120). The secondary voltage rating of the VTs can be set by the Secondary Voltage
Rating parameter (1203).
Before leaving the hardware configuration blocks, (only when
changing parameters, not when viewing) the ISGS relay displays the message END OF PASSWORD OPERATION?.
Press the No button to return to one of the configuration
blocks. The message PRESS ANY KEY TO CONTINUE
appears. Press any key to return to the screen displayed last
before the message prompt appeared. Press the Ye s button
if you are finished with the configuration changes. The device
prompts you to save the settings.
Press the Yes button to save the settings. The relay
resets and displays the Power On and Power Meter On
displays.
123
123
Wye-Wye VT Connection
41
42
43
44
45
46
41
42
ISGS
V1
4
V2
V3
ISGS
V12
Press the No button if you do not want to save the
changes The message SAVING PROCEDURE
ABORTED appears. Press Enter to return to the last
address block.
Note: For CT configuration, CTs on the neutral
must be the same rating as other CTs for
residual ground sensing, directional neutral
sensing, or direct ground sensing.
For VT connections, VTs must be either wye-wye
or delta-delta. Wye-delta or delta-wye connections are not permissible.
Open Delta-Open Delta VT Connection
Figure 4.7 Voltage Transformer Connections
Siemens Energy & Automation, Inc. 19
43
44
45
46
V23
V31
Hardware Configuration
4
1
2
3
ISGS
1
3
4
2
56
3
7
8
N
910
52 52
Three Phase Current with Residual Ground Sensing
1
2
3
ISGS
1
3
4
2
56
3
7
8
1
2
3
3
ISGS
1
4
N
2
56
3
7
8
N
910
Three Phase Current with Direct Neutral Sensing
1
2
3
3
ISGS
1
4
G
2
56
3
78
52
N
910
52
N
910
Three Phase Current with Zero Sequence CT Three Phase Current with Direct Ground Sensing
52 = Power Circuit Breaker
= ISGS Internal CT
Figure 4.8 Current Transformer Configuration
20 Siemens Energy & Automation, Inc.
Protective Function Configuration
5 Protective Function Configuration
5.1 Overview
This chapter explains how to set the parameters for the
protective functions of the ISGS relay.
Password
All parameter changes require a password. Refer to
Section 3.3 on how to enter your password. Viewing
parameter settings does not require a password.
Note: The ISGS relay is not password protected
when making parameter changes through
Wisdom software.
Configuration Steps
Perform parameter changes using steps 1 through 9 of the
standard operating procedures described in Section 3.5.
Parameter Sets
Many protective functions can be set to two different parameter setsset A and set B. These functions are indicated by
the letter A or B preceding the address block number. Alternate sets are useful for seasonal settings or for special operating periods. Either set can be selected (in address block
7100) to be the active set that controls the relay operation.
The parameters for both sets are entered in the relevant
address blocks. Waveform capture buffer settings apply to
both parameter sets. Unless you do not desire an alternate
set, configure both sets when configuring the relay.
Note: The settings for parameter sets A and B are
entered in the address block. However, the
parameter set which the ISGS relay is
actively using is selected at address block
7100. Refer to Section 6.11 for discussion
of parameter sets.
Actions on Pickup or Trip
Protective functions can be set to have actions occur on
pickup or on trip. Binary outputs can be set to be actuated
on pickup of a protective function. A protective function is set
to trip a breaker by assigning the trip contact that is connected to the breaker (default is Trip 1). Binary outputs can
also be assigned to trip a breaker. It is possible, however to
have a protective function enabled and not assigned to any
output. Events and their sequences are entered in the trip log
as usual, but the breaker will not be affected. This setting is
useful for monitoring and alarming without tripping, and for
waveform capture. For more information on the control of
inputs and outputs, refer to Chapter 6.
Pickup
When testing induction disk relays, an established practice is
to set the pickup value to 1.0 A of secondary CT output. The
time overcurrent curves will show a pickup, but the relay will
not trip in a predefined repeatable manner until it reaches 1.3
to 1.5 A. With numerical relays like the ISGS, however, a sustained pickup indication means definite operation. To
account for measurement inaccuracies, and to guarantee
that the relay will never trip at 100% of pickup or below, the
pickup point is set at 106% of the pickup setting to avoid any
unintended nuisance trips.
Neutral or Ground
The availability of protective functions for neutral or ground
depends on how the external CTs are connected. If a ground
or zero-sequence CT is used and connected to the fourth
internal CT, the ground or neutral protective function is a
ground function. If the fourth CT is connected in the common
return of the other three internal CTs (residual), the function is
indicated as being neutral. There does not need to be an
explicit selection of neutral or ground.
Custom Curve
The custom curve is one user-defined curve that can be
used by one or more protective functions that have the custom curve option in the curve list.
Wisdom Software
While the ISGS relay protective functions can be completely
configured manually using the LCD and the keypad, Wisdom
software allows faster and easier configuration when it is
used on a PC connected to either data port. For data port
connections refer to Section 2.5.
5.2 Instantaneous Phase Overcurrent (50)
The Instantaneous Phase Overcurrent function consists of a
phase instantaneous overcurrent function and an adjustable
delay. This function begins timing when any individual phase
current exceeds the pickup at 100% of set pickup point and
drops out at 95% of the pickup point.
A1500 Instantaneous Phase Overcurrent (50)
Address Parameter Option
1501 Function Enabled or Disabled
1502 Pickup 5 A CTs: 1-120 A
1 A CTs: 0.2-24 A
(0.1 A steps)
1504 Time Delay 0-60 s (0.01 s steps)
1510 Freeze Wfm1 on Pickup, on Trip, or None
1511 Freeze Wfm2 on Pickup, on Trip, or None
1512 Blocked by None, 50HS & 50HSN, 50 HSN,
or 50HS
The function can be enabled or disabled (1501).
The range of the pickup value (1502) depends on the secondary phase CT rating (1 A or 5 A), and the value is in secondary amperes.
The time delay (1504) represents the time between pickup
and trip and can be adjusted from 0 to 60 seconds in steps
of 0.1 second. If the function remains in pickup for longer
than the time delay, the function causes a trip. The delay can
also be set to infinity so that the function never times out.
Each of the two waveform capture buffers (1510 and 1511)
can be independently programmed to freeze snapshots on
pickup or trip.
The function is able to actuate any binary output contact on
pickup, and any trip or binary output contact on trip.
5
Siemens Energy & Automation, Inc. 21
Protective Function Configuration
5
5.3 High-Set Instantaneous Phase
Overcurrent (50HS)
The High-Set Instantaneous Phase Overcurrent function
causes an undelayed trip when any individual measured
phase current exceeds the preprogrammed threshold
(pickup value). The relay will trip at 100% of the set pickup
point.
A1500 High-SetInstantaneous Phase Overcurrent (50HS)
Address Parameter Option
1551 Function Enabled or Disabled
1552 Pickup 5A CTs: 5-120 A or
1A CTs: 0.2-24 A
(0.1 A steps)
1560 Freeze Wfm1 on Trip, or None
1561 Freeze Wfm2 on Trip, or None
The function can be enabled or disabled (1551). The range of
the pickup value (1552) depends on the secondary phase CT
rating (1 A or 5 A) and the value is in secondary amperes.
Each of the two waveform capture buffers (1560 and 1561)
can be independently programmed to freeze snapshots on
trip.
The function is able to actuate any binary output contact on
pickup, and any trip or binary output contact on trip.
The Instantaneous Neutral or Ground Overcurrent function
can be enabled or disabled (1601). The form of protection
provided depends on the manner in which the external CTs
are connected to the ISGS relay. Figure 4.5 in Chapter 4
shows correct CT connections and polarities.
The range of the pickup value (1602) depends on the secondary neutral CT rating (1 A or 5 A) and the value is in secondary amperes.
The time delay (1604) represents the time between pickup
and trip and can be adjusted from 0 to 60 seconds in steps
of 0.1 second. If the function remains in pickup for longer
than the time delay, this parameter causes a trip. The delay
can also be set to infinity so that the function never times out.
Each of the two waveform capture buffers (1610 and 1611)
can be independently programmed to freeze snapshots on
pickup or trip.
The function is able to actuate any binary output contact on
pickup, and any trip or binary output contact on trip.
5.5 High-Set Instantaneous Neutral or
Ground Overcurrent (50HSN)
The High-Set Instantaneous Neutral or Ground Overcurrent
function causes an undelayed trip when any individual measured phase current exceeds the preprogrammed threshold
(pickup value). The relay will trip at 100% of the set pickup
point.
5.4 Instantaneous Neutral or Ground
Overcurrent (50N)
The Instantaneous Neutral or Ground Overcurrent function
has an adjustable delay whose input is the current measured
by the neutral CT. It begins timing when the neutral or ground
current exceeds the pickup value. The ISGS relay will pickup
at 100% of set pickup point and drop out at 95% of the
pickup point.
A1600 Instantaneous Neutral or Ground Overcurrent
(50N)
Address Parameter Option
1601 Function Enabled or Disabled
1602 Pickup 5 A CTs: 1-120 A or
1 A CTs: 0.2-24 A
(0.1 A steps)
1604 Time Delay 0-60 s (0.01 s steps)
1610 Freeze Wfm1 on Pickup, on Trip, or None
1611 Freeze Wfm2 on Pickup, on Trip, or None
1612 Blocked by None, 50HS & 50HSN, 50HSN,
or 50HS
A1600 High-Set Instantaneous Neutral or Ground
Overcurrent (50HSN)
Address Parameter Option
1651 Function Enabled or Disabled
1652 Pickup 5 A CTs: 5-120 A or
1 A CTs: 0.2-24 A
(0.1 A steps)
1660 Freeze Wfm1 on Trip, or None
1661 Freeze Wfm2 on Trip, or None
The High-Set Instantaneous Neutral or Ground Overcurrent
function can be enabled or disabled (1651).
The range of the pickup value (1652) depends on the secondary phase CT rating (1 A or 5 A) and the value is in secondary amperes.
Each of the two waveform capture buffers (1660 and 1661)
can be independently programmed to freeze snapshots on
trip.
The function is able to actuate any binary output contact on
pickup, and any trip or binary output contact on trip.
22 Siemens Energy & Automation, Inc.
Protective Function Configuration
5.6 Phase Time Overcurrent (51)
The Phase Time Overcurrent function uses a selected time
overcurrent characteristic curve to determine the trip time for
the applied phase currents. The defined characteristic curves
are valid over a range of multiple of pickup values. The function also includes the ability to select a customer defined
curve. This function is always enabled. Refer to Appendix A
for detailed trip curve information.
A1700 Phase Time Overvurrent (51)
Address Parameter Option
1702 Curve Inverse
1703 Pickup 5 A CTs: 0.5-20 A or
1705 Time Dial 0.1-9.9 (0.1 steps)
1706 Filter rms or fundamental
1709 Reset Instantaneous or Disk Emulation
1710 Freeze Wfm1 on Pickup, on Trip, or None
1711 Freeze Wfm2 on Pickup, on Trip, or None
1712 Blocked by None, 50HS, 50HSN, or
The Curve parameter (1702) allows the selection of the preprogrammed characteristic curve used by this function. The
ISGS relay comes with nine standard and one custom overcurrent characteristic curves that can be adjusted with the
Time Dial parameter. The custom curve is a user-definable
protective curve that integrates with instantaneous reset. The
lower limit of the custom curve is 1.10. The maximum time to
trip is the time at 1.10.
The range of the pickup value (1703) depends on the secondary phase CT rating (1 A or 5 A) and the value is in secondary amperes. The function begins timing when any
individual phase current exceeds the pickup current setting.
Note: The pickup point is 1.06 of the pickup set-
ting. Refer also to paragraph on Pickup in
Section 5.1.
Short Inverse
Long Inverse
Moderately Inverse
Custom
Very Inverse
Extremely Inverse
Definite Inverse
Slightly Inverse
2
T Without Limit
I
1 A CTs: 0.1-4 A
(0.1 A steps)
50HS & 50 HSN
The Reset parameter (1709) offers instantaneous or disk
emulation settings. Selecting Instantaneous causes the relay
to clear the timer when the current drops below the pickup
threshold. Selecting Disk Emulation causes the relay to simulate the integrating disk characteristics of electromechanical
relays, where the delay time decays over time. With disk
emulation, a relay that continuously picks up and drops out
will eventually trip. Set this parameter to Instantaneous when
using a custom curve.
Each of the two waveform capture buffers (1710 and 1711)
can be independently programmed to freeze snapshots on
pickup or trip.
The function is able to actuate any binary output contact on
pickup, and any trip or binary output contact on trip.
5.7 Neutral Time Overcurrent (51N)
The Neutral Time Overcurrent function uses a selected time
overcurrent characteristic curve to determine the trip time for
the applied current at the fourth current input. The defined
characteristic curves are valid over a range of multiple of
pickup values. The function also includes a customer defined
curve. Refer to Appendix A for detailed trip curve information.
A1800 Neutral Time Overcurrent (51N)
Address Parameter Option
1801 Function Enabled or Disabled
1802 Curve Inverse
1803 Pickup 5 A CTs: 0.5-20 A or
1805 Time Dial 0.1-9.9 (0.1 steps)
1806 Filter rms or fundamental
1809 Reset Instantaneous or Disk Emulation
1810 Freeze Wfm1 on Pickup, on Trip, or None
1811 Freeze Wfm2 on Pickup, on Trip, or None
1812 Blocked by None, 50HS, 50HSN, or
Short Inverse
Long Inverse
Moderately Inverse
Custom
Very Inverse
Extremely Inverse
Definite Inverse
Slightly Inverse
2
T Without Limit
I
1 A CTs: 0.1-4 A
(0.1 A steps)
50HS & 50 HSN
5
The Time Dial parameter (1705) used for the selected curve
allows the time-to-trip of the curve to be raised or lowered
The dial can be adjusted from 0.1 to 9.9 in steps of 0.1.
The Filter parameter (1706) sets the sensing method used by
the function in its pickup calculations. The rms filter uses fundamental current plus harmonics, while the fundamental filter
ignores harmonics.
The Neutral or Ground Time Overcurrent function can be
enabled and disabled (1801).
The Curve parameter (1702) allows the selection of the preprogrammed characteristic curve used by this function. The
ISGS relay comes with nine standard and one custom overcurrent characteristic curves that can be adjusted with the
Time Dial parameter. The custom curve is a user-definable
Siemens Energy & Automation, Inc. 23
5
Protective Function Configuration
protective curve that integrates with instantaneous reset. The
lower limit of the custom curve is 1.10. The maximum time to
trip is the time at 1.10.
The range of the pickup value (1803) depends on the secondary phase CT rating (1 A or 5 A) and the value is in secondary amperes.
The Time Dial parameter (1805) used for the selected curve
allows the time-to-trip of the curve to be raised or lowered.
The dial can be adjusted from 0.1 to 9.9 in steps of 0.1.
The Filter parameter (1806) sets the sensing method used by
the function in its pickup calculations. The rms filter uses fundamental current plus harmonics, while the fundamental filter
ignores harmonics.
The Reset parameter (1709) offers instantaneous or disk
emulation settings. Selecting Instantaneous causes the relay
to clear the timer when the current drops below the pickup
threshold. Selecting Disk Emulation causes the relay to simulate the integrating disk characteristics of electromechanical
relays, where the delay time decays over time. With disk
emulation, a relay that continuously picks up and drops out
will eventually trip. Set this parameter to Instantaneous when
using a custom curve.
Figure 5.1 Blocking Capability Diagram
Each of the two waveform capture buffers (1810 and 1811)
can be independently programmed to freeze snapshots on
pickup or trip.
The function is able to actuate any binary output contact on
pickup, and any trip or binary output contact on trip.
5.8 Blocking Capability for Breaker or
Interrupter Saving
High-set instantaneous phase overcurrent (50HS) and highset instantaneous neutral or ground overcurrent (50HSN)
functions have the capability to block 50, 51, 50N, and 51N
selectively to prevent opening an interrupting device should
the fault current exceed the rating of the device.
This function is used to keep an electrically-operated load
break switch, recloser, or aging circuit breaker from attempting to interrupt current beyond its capability or rating. It must
be used in conjunction with a slight delay (25 ms) in 50 so
that 50HS can pickup or trip before 50 times out and trips.
Should these parameters be set, a fault large enough to
cause 50HS to pickup or trip before 50 has timed out will
prevent 50 and/or 51, 50N, and 51N from tripping.
50HS/N can also be matrixed to an output contact to block
differential tripping of a transformer differential relay when a
fault is between the interrupter and the high side (bushings)
of the transformer.
5.9 Directional Phase Time Overcurrent (67)
The Directional Phase Time Overcurrent function uses a
selected time overcurrent characteristic curve to determine
the trip time for the applied phase currents, utilizing the voltages present on the VTs to determine current direction. The
defined characteristic curves are valid over a range of multi-
ple of pickup values. The function also includes a customer
defined curve. Refer to Appendix A for detailed trip curve
information. This function is only available if the voltage input
option is installed.
A1900 Directional Phase Time Overcurrent (67)
Address Parameter Option
1901 Function Enabled or Disabled
1902 Curve Inverse
1903 Pickup 5 A CTs: 0.5-20 A or
1905 Time Dial 0.1-9.9 (0.1 steps)
1906 Filter rms or fundamental
1907 Impedance 0-90°
1908 Direction Forward or Reverse
1910 Freeze Wfm 1 on Pickup, on Trip, or None
1911 Freeze Wfm 2 on Pickup, on Trip, or None
Short Inverse
Long Inverse
Moderately Inverse
Custom
Very Inverse
Extremely Inverse
Slightly Inverse
Definite Inverse
2
T Without Limit
I
1 A CTs: 0.1-4 A
(0.1 A steps)
24 Siemens Energy & Automation, Inc.
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