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HighTECH MRG3
Seg HighTECH MRG3 - User Manual
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MRG3
PR
OT
EC
TI
ON
T
EC
HN
OLO
GY
MAD
E S
IMPL
E
GENER
A
TOR PROTECTION WITH MAINS
SUPER
VISION, TIME OVER
CURRENT PROTECTION
AND EAR
TH CURRENT SUPER
VISION
HighTECH Line
GENERA
TOR PROTECT
GENERATOR PROTECT
ION WITH MAINS SUPERVISION,
TIME OVERCURRENT PROTECTION AND
EARTH CURRENT SUPERVISION
Original
document
English
Revision:
D
M
A
N
U
A
L
2
Table of Contents
Main Page
Default Chapter
3
Table of Contents
3
1 Overview and Application
6
2 Features and Characteristics
7
3 Design
8
Connections
8
Connection Diagrams
8
Analog Input Circuits
13
Output Relays
13
Blocking Input
13
External Reset Input
13
Serial Interface
13
Auxiliary Voltage Supply
13
Code Plugs
14
Low/High Range of the Digital Inputs
16
Front Plates
17
Leds
20
4 Working Principle
21
Analog Circuits
21
Digital Circuits
21
Voltage Supervision
21
Selection of Star or Delta Connection
22
Principle of Frequency Supervision
23
Mains Decoupling
24
Measuring of Frequency Gradients
24
Vector Surge Supervision
25
Measuring Principle of Vector Surge Supervision
26
Voltage Threshold Value for Frequency, Df/Dt and Vector Surge Measuring
29
Over Current- and Short Circuit Supervision
29
Earth Fault Protection
30
Generator Stator Earth Fault Protection
30
System Earth Fault Protection
30
Earth-Fault Directional Feature
31
Residual Voltage
33
Behavior of MRG3 under Different Operating Conditions
33
Blocking Function Set in Compliance with Requirements
33
Fault Recorder
34
5 Operation and Settings
36
Display
36
Setting Procedure
40
Systemparameters
40
Y - Change-Over Switch
40
Display of Measurement Values as Primary Quantity
40
Setting of Measured Secondary Values for the Voltage Transformers
40
Setting of the Generator's Nominal Values
40
Voltage Transformer Connection for Residual Voltage Measuring (3Pha/E-N/1:1)
41
Nominal Frequency
41
Selection between Vector Surge Function or Df/Dt Supervision
41
Display of the Activation Storage
41
Parameter Changeover Switch/External Triggering of the Fault Recorder
42
Protection Parameter "Mains Decoupling
43
Parameter Setting of "Over- and under Voltage Functions
43
Number of Measuring Repetitions (T) for Frequency Functions
43
Threshold Values of Frequency Supervision
44
Tripping Delays for the Frequency Elements
44
Parameter Setting for Vector Surge Supervision or Df/Dt Speed
44
Settable Threshold
46
Protection Parameter "Over Current
46
Pickup Value for Phase over Current Element
46
Time Current Characteristics for Phase over Current Element
46
Trip Delay or Time Factor for Phase over Current Element
46
Reset Mode for All Tripping Characteristics in the Phase Current Path
47
Pick-Up Value for High Set Element
47
Trip Delay for High Set Element
47
Parameter Protection Earth Fault Supervision
48
Pick-Up Value for Residual Voltage
48
Trip Delay for Residual Voltage (Only MRG3-IU0 and MRG3-U0)
48
Pick-Up Value for Earth Fault Element
48
WARN/TRIP Changing-Over
48
Time Current Characteristics for Earth Fault Element (Only MRG3-IE)
48
Trip Delay or Time Multiplier for Earth Fault Element
49
Reset Mode for Tripping Characteristics in Earth Current Path
49
Pick-Up Value for Earth Faults Resp. Earth Short Circuit Fast Trips
49
Trip Delay for Earth Fault S Resp. Earth Short Circuit Fast Trips
49
COS/SIN-Measurement
49
More Settings
50
Circuit Breaker Failure Protection
50
Adjustment of the Slave Address
50
Setting of Baud-Rate (Applies for Modbus Protocol Only)
50
Setting of Parity (Applies for Modbus Protocol Only)
50
Fault Recorder
51
Adjustment of the Fault Recorder
51
Number of the Fault Recordings
51
Adjustment of Trigger Occurrences
51
Pre-Trigger Time
51
Adjustment of the Clock
52
Additional Functions
53
Blocking of Protection Functions and Assignment of the Output Relays
53
Indication of Measuring Values
55
Measuring Indication for Mains Decoupling
55
Storage of Min./Max. Values
55
Unit of the Measuring Values Displayed
56
Indication of Values Measured for over Current - and Earth Fault Protection
56
Units of the Measuring Values
57
Indication of Fault Data
58
Fault Recorder
58
Erasure of Fault Storage
59
Reset
60
Delete of Disturbance Records
60
6 Maintenance and Commissioning
61
Connection of Aux. Voltage
61
Testing of the Output Relays and Leds
61
Checking the Set Values
62
Test with Transformer Secondary Current (Secondary Injection Test)
62
Equipment Required to Test Voltage Functions
62
Test Circuit
63
Checking of the Input Circuits and Measuring Functions
64
Checking the Pick-Up and Release Values for Over/Under Voltage
64
Checking of the Tripping Delay Time for Over/Under Voltage
64
Checking of the Pick-Up and Release Values for Over/Under Frequency
65
Checking of the Tripping Delay Time for Over/Under Frequency S
65
Checking of the Vector Surge Function
65
Test with Transformer Secondary Current (Secondary Injection Test)
66
Equipment Required to Test Voltage Functions
66
Test Circuit for the Current Function
67
Checking the Input Circuits and Measured Values
67
Checking the Operating and Resetting Values of the Relay
68
Checking of the Tripping Delay
68
Checking the High Set Element of the Relay
68
Example of a Test Circuit for MRG3-IER-Relay with Earth Current Directional Feature
69
Checking the External Blocking and Reset Inputs
70
Test of the CB Failure Protection
70
Primary Injection Test
70
Maintenance
70
7 Technical Data
71
Measuring Input Voltage
71
Influences on the Voltage Measurement
71
Frequency Measurement
71
Influences on the Frequency Measurement
71
Measuring Input: Phase Current
72
Influences on the Current Measurement
72
Measuring Input: Residual Voltage
72
Influences on the Residual Voltage Measuring
72
Measuring Input: Earth Current
73
Influences on the Earth Current Measuring
73
Common Data
74
Output Relays
74
Setting Ranges and Steps
75
System Parameter
75
Parameter Protection: Voltage, Frequency, Df/Dt Protection
77
Time over Current Protection
79
Earth Fault Supervision
80
Earth Fault Supervision with Directional Feature
81
Determination of the Earth Fault Direction (MRG3-IER)
81
Residual Voltage Protection
82
CB Failure Protection
82
Interface Parameter
82
Parameter for the Fault Recorder
83
Output Relay
83
Inverse Time over Current Protection Relay
84
Inverse Time Characteristics
85
8 Order Form
88
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Seg HighTECH MRG3 Specifications
General
Brand
Seg
Model
HighTECH MRG3
Category
Power distribution unit
Language
English
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