Siemens 7UT51 Manuals

Manuals and User Guides for Siemens 7UT51. We have 2 Siemens 7UT51 manuals available for free PDF download: Instruction Manual

Siemens 7UT51 Instruction Manual (232 pages)

Protective Relay

Brand: Siemens | Category: Relays | Size: 2.95 MB

Table of Contents
3
Introduction
11
Using this Manual
11
Definitions of Terms
11
Description of Relay
13
Overview
13
Features
13
Protection Overview
13
Differential Protection (87T/87HS, 87M/G, 87B)
14
Overcurrent Protection (50/51, 50HS)
14
Thermal Overload Protection (49-1, 49-2)
15
Ground Differential Protection (87N)
15
Tank Leakage Protection (64T)
15
Metering
15
Commissioning Data
16
Data Acquisition
16
Configuration & Analysis Software (Windigsi )
16
Data Communication Ports
16
Control
16
Construction
17
Catalog Number
17
Protection Functions Available at 60Hz
18
Inputs and Outputs
18
Phase Differential Protection of a Transformer (87T and 87HS)
20
Phase Differential Protection of a Transformer (87T and 87HS)
21
Phase Differential Protection of a Generator or Motor (87G/M)
22
Phase Differential Protection of a Bus (87B)
23
Ground Differential Protection (87N) (Optional with 7UT513)
24
Overcurrent Protection (50/51 and 50HS)
25
Thermal Overload Protection (49-1 and 49-2)
26
Tank Leakage Protection (64T)
27
Service, Storage, and Transport Conditions
27
Application Examples
31
Transformer Protection
31
Reactor Protection
33
Motor and Generator Protection
34
Bus Protection
35
Transformer Differential Protection (87T and 87HS)
39
Method of Operation
39
Matching Currents
39
Handling Non-Ideal Behavior
41
Describing the Transformer
43
Type of Transformer
44
Normal Operational Status
44
System Frequency
44
Rated Phase-To-Phase Voltage
45
Rated Apparent Power
45
Phase Shift between Windings
45
Describing the CT Scheme
48
Nominal Secondary Rating of Cts
48
Nominal Primary Rating of Cts
48
Three-Winding Transformers with Considerably Different Rated Powers
48
Orientation of Cts
49
Processing the Zero Sequence Current
49
Zero-Sequence Current Elimination Vs. Correction Mathematical Illustration
50
Using a Ground or Neutral Current CT
54
Trip Characteristic
55
Minimum 87T Trip Threshold
56
High Set (87HS) Trip Threshold
56
Lower Slope of Pickup Characteristic
57
Upper Slope of Pickup Characteristic
58
Through-Fault Restraint
58
Second-Harmonic Restraint
59
Higher-Harmonic Restraint
60
Blocking by Frequency Variance
61
Time Delays
61
Events and Actions
62
Single-Phase Transformers
66
Motor or Generator Differential Protection (87M/G)
67
Method of Operation
67
Describing the Protected Motor or Generator
67
Type of Protected Object
68
Normal Operational Status
68
System Frequency
68
Motor/Generator Information
68
Describing the CT Scheme
69
CT Orientation
69
Nominal Primary Rating of Cts
71
Nominal Secondary Rating of Cts
71
Trip Characteristic
71
Trip Characteristic Settings
72
Through-Fault Restraint
74
Blocking by Frequency Variance
74
Time Delays
75
Events and Actions
75
Bus Differential Protection (87B)
79
Method of Operation
79
Describing the Protected Bus
79
Type of Protected Object
79
System Frequency
80
Rated Nominal Current
80
Normal Operational Status
80
Describing the CT Scheme
81
Nominal Primary Rating of Cts
81
Nominal Secondary Rating of Cts
81
Orientation of Cts
81
Trip Characteristic
83
Trip Characteristic Settings
84
Through-Fault Restraint
85
CT Circuit Monitoring
86
Time Delays
86
Events and Actions
86
Ground Differential Protection (87N)
91
Calculated Quantities
92
Trip Decision
93
Second Harmonic Restraint
94
Normal Operational Status
95
Pickup Level and Limit Angle
95
Harmonic Restraint
96
Time Delays
96
Events and Actions
96
Time Overcurrent Protection (50HS and 50/51)
99
Method of Operation
99
Normal Operational Status
99
High-Set Element (50HS)
100
Overcurrent Element (50 or 51)
100
Definite Time Element (50)
101
Inverse Time Element (51)
101
Reset Time Delay
101
Overcurrent Protection During Manual Close of Breaker
102
Events and Actions
106
Thermal Overload Protection (49-1, 49-2)
107
Method of Operation
107
Normal Operational Status
108
Pickup Characteristic and Warning Levels
108
Maximum Continuous Overload Current
108
Time Constant Τ
108
Warning Alarm Levels
109
Temperature Rise Calculation Method
109
Logical Events and Actions
111
Tank Leakage Protection (64T)
113
Method of Operation
113
Normal Operational Status
113
Pickup and Dropout Levels
114
Time Delays
115
Events and Actions
115
Protecting an Additional Device or Equipment
117
Protection Self-Monitoring
119
Self-Monitor Signal Contact
119
Internal Self-Monitoring
119
Reset of Leds
119
Change of Parameter Set
119
Software-Hardware Mismatch
119
Data Buffer Invalid or Overflowing
119
Memory Monitoring (Checksum)
119
Processor
120
Internal Power Supplies
120
Analog/Digital Converters
120
Trip Circuits
120
Monitoring of Supply Power
120
Monitoring of CT Circuits
120
Current Symmetry
120
Current Summation
121
Events and Actions
122
Binary-Signal Inputs, Signal Contacts, Trip Contacts, and LED Indicators
123
Overview
123
Binary-Signal Inputs
126
Signal Output Contacts
127
Programmable Signal Contacts
127
LED Targets
128
Trip (Command) Contacts
129
Processing External Trip Commands
131
Normal Operational Status
131
Time Delays
131
Numerical Listing of User Definable Trip and Signal Functions
132
Operation Using the Front Panel Controls
137
Front Panel Components
137
Display
137
Keypad
137
On/Off Switch
137
Relay Nameplate
138
LED Indicators
139
Custom LED Labels
140
Data Communications Port
140
Viewing a Setting
140
Entering an Address Directly
140
Scrolling to an Address
141
Changing a Setting
141
Entering Password Mode
141
Changing an Entered Value
142
Changing a Setting Selected from a List
142
Changing a Control Configuration Option
142
Using Multiple Settings Groups
143
Selecting Which Group to Configure
143
Changing the Group in Use by the Relay
143
Copying a Group's Contents
144
Operational/Event Log and Fault Logs
145
Viewing a Log
145
Clearing a Log
146
Measured Values
146
Capturing Waveform Data
147
Address Blocks
149
General Configuration
151
Front-Panel Display Options
151
Use of Multiple Parameter Sets
151
Setting Date & Time
152
Operation Using a Personal Computer
153
Overview
153
Programming the Relay
154
Parameter Menu
154
Configuration Menu
154
Marshalling Menu
156
Settings Menu Example for Transformer Protection
156
Bench Testing
159
Required Test Equipment
159
Important Notes for this Procedure
160
Annunciations and Setting Examples
160
Verify Actual Programming of Trip Relays and Signal Relays
160
Control of Protective Elements by Discrete Inputs During Testing
160
Testing Transformer Differential Protection
160
Ideal Through-Fault Test
162
Validate Metering
163
Three-Winding Transformer Differential Protection (7UT513 Only)
164
Testing the Differential Element 87T
165
Testing Differential Setting of High-Set Element 87HS
166
Testing Harmonic Restraint
167
Testing Restricted Ground Fault Protection (7UT513 Only)
167
Branch Point Differential Protection Testing
171
Backup Overcurrent Time Protection Testing
171
Testing the High-Set Overcurrent Stage
172
Testing the Definite Time Overcurrent Stage
172
Testing the Inverse Time Overcurrent Stage
172
Thermal Overload Protection Testing
173
Warning, Overload Current: Address 2405 (49-1) and 2505 (49-2)
174
Warning, Temperature: Addresses 2404, 2403 and 2402
175
Addresses 2504, 2503, and 2502 (49-2)
175
Tripping: Addresses 2402 and 2403 (49-1), 2502 and 2503 (49-2)
176
Tank Leakage Protection Testing (if Available)
177
External Trip Function Coupling Testing
177
Putting the Relay into Operation
178
Installation and Servicing
179
Transport and Storage
179
Unpacking and Repacking
179
Removing and Inserting the Relay Modules
180
Mounting the Relay Case
181
Wiring
183
Connection Diagrams
184
Checking Connections
188
Replacing the Internal Fuse
188
Installing or Replacing the Battery
189
Changing the Rated Nominal Current of the Current Inputs
189
Changing the Rated Voltage of the Binary-Signal Inputs
192
Changing the Normal Signal Position of the Fiberoptic Data Port
194
Field Testing and Commissioning
195
Preparation
195
Physical Inspection
195
Energizing the Relay
196
Check Matching Factors
197
Preparation of Primary Tests
197
Symmetrical Current Tests, Address Block 4100
198
Tests Related to All Applications
199
Tests Related to Protected Objects with Three Terminals
201
Preparation for Zero Sequence Current Tests
202
Zero Sequence Tests - Address Block 4100
202
Current Test for Restricted Ground Fault Protection, Address Block 41
203
Leaving Test Operation, Address Block 4800
205
Checking the Coupling of External Trip Signals
205
Operational Checks
205
Energizing the Protected Object
206
In-Service Readings
206
Operational Measured Values
206
Measured Current Tests - Address Block 4100
206
Waveform Capture During Test Fault Record - Address 4900
207
Installation of 7UT51 Relay in Existing Circuit
208
Output Connections
208
Testing for In-Service Setting Changes
208
Putting the Relay into Operation
209
Maintenance and Servicing
211
Troubleshooting Tips
211
Routine Checks
211
When to Return a Relay
212
Settings Record
213

Siemens 7UT51 Instruction Manual (248 pages)

Numerical Differential Protection Relay, for Transformers, Generators, Motors, and Branch Points

Brand: Siemens | Category: Relays | Size: 4.15 MB

Siemens Categories

Industrial Equipment Controller Control Unit

Oven

Washer

More Siemens Manuals

Siemens 7UT51 Manuals

Siemens 7UT51 Instruction Manual (232 pages)

Table of Contents

Siemens 7UT51 Instruction Manual (248 pages)

Related Products

Siemens Categories