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Seg Manuals
Protection Device
HighTECH Line MRI1IU
Instruction manual
Seg MRI1-IU Instruction Manual
Voltage controlled time overcurrent relay
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Table of Contents
Contents
Introduction and Application
Features and Characteristics
Design
Connections
Analog Input Circuits
Output Relays
Working Principle
Leds
Analog Circuits
Digital Circuits
Voltage Controlled Tripping Characteristic
Demand Imposed on the Main Current Transformers
Operation and Setting
Display
Setting Procedure
Current Setting Values for Overcurrent Relay
Time Current Characteristics for Phase Overcurrent Element
Trip Delay or Time Multiplier for Phase Overcurrent Element
Current Setting for High Set Element
Trip Delay for High Set Element
Undervoltage Set Reference Value
Nominal Frequency
Assignment of the Output Relays
Blocking the Protection Functions
Indication of Measuring Values
Indication of Fault Data
Reset
Manual Reset
Relay Testing and Commissioning
Power on
Testing the Output Relays and Leds
Checking the Set Values
Example of Test Circuit Relays Without Directional Feature
Checking the Input Circuits and Measured Values
Checking the Relay Operating Time
Checking the High Set Element of the Relay
Checking the External Blocking and Reset Functions
Primary Injection Test
Maintenance
Technical Data
Measuring Input Circuits
Common Data
Setting Range and Steps
Definite Time Overcurrent Protection Relay
Inverse Time Overcurrent Protection Relay
Inverse Time Characteristics
Output Contacts
Normal Inverse
Very Inverse
Order Form
Setting of Code Jumpers
Setting List MRI1
Setting of the Parameters
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Summary of Contents for Seg MRI1-IU
Page 3
• • • • • • • • • • • •...
Page 6
t[s] 10 10 =1.0 =0.5 I> 0.6 0.8 1 1 8 10 10...
Page 7
→←...
Page 10
• • • • • • •...
Page 11
• • • • • • • • •...
Page 12
• • • • • • • ≥ • ≥ • ≤ ± • •...
Page 14
±...
Page 15
• • •...
Page 16
± ≤...
Page 17
± ± ± ± ± ± ± ± ± > − > − > − ± ± ± ± ± ± ± ±...
Page 18
1000 1000 I> 10.0 I> t[s] t[s] 10.0 0.05 0.05 5 6 7 8 9 10 5 6 7 8 9 10 1000 I> 0.02 t[s] t[s] I> > 10.0 0.03 I>> >> 0.03 0.05 0.01 0.01 5 6 7 8 9 10...
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