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Protection Device
845
GE 845 User Manual
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CHAPTER 8: TRANSFORMER M&D
MODELS
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MA
NUAL
8–7
The Dat
a correlation model in this section is a customized trend chart where the user can
select the
requir
ed paramet
er trends to
display.
DGA Models
DGA models consist of the standar
d Duval Triangle and G
as Ratios model which is
computed based on the late
st 50 DGA dat
a samples. The Key G
as model is computed
based on the latest DGA dat
a.
538
540
Table of Contents
Default Chapter
3
Table of Contents
3
INTRODUCTION Overview
11
Description of the 845 Transformer Protection Relay
12
Security Overview
17
845 Order Codes
18
Device
20
Protection
20
Specifications
20
Control
27
Monitoring
28
Recording
29
User-Programmable Elements
30
Metering
31
Inputs
33
Outputs
35
Power Supply
36
Communications
37
Testing & Certification
38
Environmental
39
Physical
39
Cautions and Warnings
40
Safety Words and Definitions
40
General Cautions and Warnings
40
Must-Read Information
43
Storage
44
For Further Assistance
44
Repairs
44
Product Identification
45
INSTALLATION Mechanical Installation
45
Dimensions
46
Mounting
47
Standard Panel Mount
48
Depth Reducing Collar
49
Draw-Out Unit Withdrawal and Insertion
51
Removable Power Supply
52
Removable Magnetic Module
53
Arc Flash Sensor
54
Sensor Fiber Handling & Storage
54
Sensor Installation
54
Electrical Installation
55
Typical Wiring Diagrams
55
Terminal Identification
60
Wire Size
64
Phase Sequence and Transformer Polarity
65
Ground CT Inputs
65
Voltage Inputs
66
Restricted Earth Fault Inputs
66
Zero-Sequence CT Installation
67
Control Power
68
Contact Inputs
68
Output Relays
69
Serial Communications
71
Irig-B
73
Graphical Display
76
INTERFACES Front Control Panel Interface
76
Output Relays
77
Working with Graphical Display
77
Single Line Diagram
80
Rugged and Membrane Front Panel Leds
82
Home Screen Icons
84
Relay Messages
85
Target Messages
85
Self-Test Errors
86
Flash Messages
89
Out of Service
89
Label Removal
89
Software Interface
91
Enervista 8 Series Setup Software
91
Hardware & Software Requirements
91
Installing the Enervista 8 Series Setup Software
92
Upgrading the Software
94
Connecting Enervista 8 Series Setup Software to the Relay
95
Using the Quick Connect Feature
95
Configuring Ethernet Communications
96
Connecting to the Relay
97
Working with Setpoints & Setpoints Files
98
Engaging a Device
99
Entering Setpoints
99
File Support
100
Using Setpoints Files
100
Adding Setpoints Files to the Environment
101
Downloading & Saving Setpoints Files
101
Creating a New Setpoints File
102
Upgrading Setpoints Files to a New Revision
103
Printing Setpoints
104
Loading Setpoints from a File
105
Printing Values from a Connected Device
105
Uninstalling Files and Clearing Data
106
Quick Setup
106
Upgrading Relay Firmware
108
Loading New Relay Firmware
109
Advanced Enervista 8 Series Setup Software Features
112
SLD Configurator
112
Flexcurve Editor
119
Transient Recorder (Waveform Capture)
120
Protection Summary
124
Offline Settings File Conversion
125
Convert SR 745 Files
125
Conversion Summary Report
127
Results Window
127
SETPOINTS Setpoints Main Menu
130
Protection and Trip Breaker Selection
130
Setpoints Entry Methods
135
Common Setpoints
135
Logic Diagrams
137
Setpoints Text Abbreviations
138
Device
139
Real-Time Clock
141
Clock
142
PTP Configuration
143
SNTP Protocol
144
Security
145
Basic Security
146
Cybersentry
148
Communications
154
Wifi
155
Ethernet Ports
158
Modbus Protocol
160
Routing
164
DNP Protocol
166
DNP / IEC104 Point Lists
169
Iec 60870-5-104
171
Iec 60870-5-103
173
Remote Modbus Device
175
Transient Recorder
176
Data Logger
178
Fault Reports
181
Event Data
182
Programmable Leds
183
Programmable Pushbuttons
184
Tab Pushbuttons
188
Annunciator
191
Display Properties
193
Default Screens
194
Home Screens
195
Resetting
196
System
198
Current Sensing
199
Power Sensing
201
Transformer
202
Transformer Setup
203
Xfmer Status Detection
228
Thermal Inputs
231
On-Load Tap Changer
232
Breakers
238
Switches
240
Flexcurves
243
Inputs
245
Virtual Inputs
248
Remote Inputs
250
Output Relays
255
Outputs
255
Auxiliary Relay Selected for Breaker Trip
258
Aux Relay Selected for Breaker Close
260
Auxiliary Output Relays
262
Critical Failure Relay #8
263
Virtual Outputs
264
Analog Outputs
264
Protection
266
Percent Differential
268
Transformer Overload
279
Current Elements
281
Inverse Time Overcurrent Curves
281
Percent of Load-To-Trip
288
Phase Time Overcurrent Protection (51P)
289
Phase Instantaneous Overcurrent Protection (50P)
292
Phase Directional Overcurrent Protection (67P)
294
Neutral Time Overcurrent Protection (51N)
297
Neutral Instantaneous Overcurrent Protection (50N)
300
Neutral Directional Overcurrent Protection (67N)
303
Ground Time Overcurrent Protection (51G)
308
Ground Instantaneous Overcurrent Protection (50G)
310
Ground Directional Overcurrent Protection (67G)
312
Restricted Ground (Earth) Fault (87G)
316
Negative Sequence Time Overcurrent Protection (51_2)
321
Negative Sequence Instantaneous Overcurrent Protection (50_2)
323
Voltage Elements
326
Undervoltage Curves
327
Phase Undervoltage Protection (27P)
328
Auxiliary Undervoltage (27X)
331
Phase Overvoltage Protection (59P)
334
Auxiliary Overvoltage Protection (59X)
337
Neutral Overvoltage Protection (59N)
340
Negative Sequence Overvoltage Protection (59_2)
343
Volts Per Hertz (24)
345
Power Elements
351
Directional Power (32)
351
Frequency Elements
357
Underfrequency (81U)
357
Overfrequency (81O)
360
Frequency Rate of Change (81R)
363
Monitoring
367
Transformer
367
Harmonic Derating
367
Thermal Elements
370
Tap Changer Failure
378
Trip and Close Circuit Monitoring
380
Breaker Arcing Current
387
Breaker Health
390
Functions
394
Power Factor (55)
394
Demand
400
Pulsed Outputs
409
Digital Counters
412
Harmonic Detection
415
RTD Temperature
418
RTD Trouble
423
Loss of Communications
424
Control
426
Local Control Mode (Breakers and Switches)
429
Breaker Control
438
Switch Control (9)
441
Virtual Input Control
444
Trip Bus
445
Breaker Failure (50BF)
447
Setup
448
Initiate
450
Arc Flash Protection
452
Synchrocheck (25)
454
VT Fuse Failure (VTFF)
459
Flexlogic
461
Timers
471
Flexlogic Equation
473
Viewing Flexlogic Graphics
475
Flexelements
476
Testing
482
Simulation
483
Pre-Fault
484
Fault
485
Test Leds
486
Ethernet Loopback Test
487
STATUS Summary
490
Annunciator
491
Breakers
492
Switches
493
Contact Inputs
494
Virtual Inputs
495
Virtual Outputs
496
Information
501
Hardware Versions
502
Device Status
503
Clock
504
METERING Summary
508
Transformer
509
Windings
510
Thermal Elements
511
Currents
512
Voltages
514
Frequency
515
Volts Per Hertz
516
Harmonics 1(Harmonics 4)
517
Harmonic Detection
518
Power
519
Energy
520
Power Factor
521
Current Demand K1
522
Directional Power
523
Rtds
524
Flexelements
525
RECORDS Events
527
Fault Reports
528
Breakers
529
Remote Modbus Device
530
Clear Records
532
M&D Device Data
535
Learned Data Records
536
Energization Records
537
Digital Fault Records
538
DGA Models
539
Historical Maximum Record
540
DGA Historical Trend
541
Environmental Health Report
543
General Maintenance
545
Warranty
547
A.APPENDIX a Warranty
548
Major Updates
548
4
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GE 845 Specifications
General
Brand
GE
Model
845
Category
Protection Device
Language
English
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