User Manuals: Woodward MRI3-ITE Time Overcurrent Relay

Manuals and User Guides for Woodward MRI3-ITE Time Overcurrent Relay. We have 1 Woodward MRI3-ITE Time Overcurrent Relay manual available for free PDF download: Manual

Woodward MRI3-ITE Manual (64 pages)

Time overcurrent relay with thermal replica and earth current measuring

Brand: Woodward | Category: Relays | Size: 0 MB

Table of Contents
3
Introduction and Application
5
Features and Characteristics
6
Design
7
Connections
7
Analogue Input Circuits
8
Output Relays
9
Relay Output Contacts
9
Blocking Input
10
External Reset Input
10
Fault Recorder
10
Front Plate
12
Working Principle
14
Analog Circuits
14
Digital Circuits
14
Thermal Replica
15
Definitions
15
Algorithm
16
Earth Fault Protection
19
Generator Stator Earth Fault Protection
19
System Earth Fault Protection
19
Earth-Fault Directional Feature (ER-Relay Type)
20
Demand Imposed on the Main Current Transformers
22
Operation and Settings
23
Display
23
Leds
25
Setting Procedure
27
System Parameter
27
Display of Measuring Values as Primary Quantities
27
Prim Phase)
27
Display of Earth Current as Primary Quantity (I Display of Residual Voltage UE as Primary Quantity (U Voltage Transformer Connection for Residual Voltage Measuring (3Pha/E-N/1:1)
27
Prim Earth)
27
Prim /U Sec )
27
Nominal Frequency
28
Display of the Activation Storage (FLSH/NOFL)
28
Parameter Switch/External Triggering of the Fault Recorder
28
Protection Parameters
29
Constant K
29
B,A and I B,T
29
Energizing Delay (Time) for the Thermal Overload
29
Time Constant
29
Pickup Current for Phase over Current Element (I>)
29
Time Current Characteristics for Phase Overcurrent Element (CHAR I>)
30
Trip Delay or Time Multiplier for Phase over Current Element (Ti>)
30
Reset Setting for Inverse Time Tripping Characteristics in the Phase Current Path
30
Current Setting for High Set Element (I>>)
30
Trip Delay for High Set Element (Ti>>)
30
Pickup Value for Residual Voltage U (ITER-Relay Type)
31
Pickup Current for Earth Fault Element (I )
31
WARN/TRIP Changeover
31
Time Current Characteristics for Earth Fault Element (CHAR IE) (Not er Device Type)
31
Trip Delay or Time Multiplier for Earth Fault Element (T Resetting Time for Inverse Time Earth Fault Element (Not ER-Relay Type)
31
Current Setting for High Set Element of Earth Fault Supervision (I )
31
Trip Delay for High Set Element of Earth Fault Supervision (T COS/SIN Measurement (er - Relay Type)
32
COS/SIN Measurement (er - Relay Type)
32
Block/Trip - Time (Only ITE-Device Type)
32
Circuit Breaker Failure Protection T
32
Adjustment of the Slave Address
32
Cbfp
32
Setting of Baud-Rate (Applies for Modbus Protocol Only)
32
Setting of Parity (Applies for Modbus Protocol Only)
32
Fault Recorder
33
Adjustment of the Fault Recorder
33
Number of the Fault Recordings
33
Adjustment of Trigger Occurrences
33
Pre-Trigger Time (T )
33
Adjustment of the Clock
33
Additional Functions
34
Blocking of the Protective Functions
34
Indication of Measuring and Fault Values
37
Indication of Measuring Values
37
Unit of the Measuring Values Displayed
37
Indication of Fault Data
38
Fault Memory
38
Reset
39
Erasure of Fault Storage
39
Reset of the Thermal Replica Register
39
Relay Testing and Commissioning
40
Power-On
40
Testing the Output Relays and Leds
40
Checking the Set Values
40
Secondary Injection Test
40
Test Equipment
40
Example of Test Circuit for MRI3-ITE
41
Checking the Input Circuits and Measured Values
41
Example of a Test Circuit with Earth Fault Directional Feature
42
Checking the Operating and Resetting Values of the Relay
43
Checking the Relay Operating Time
43
Checking the High Set Element of the Relay
43
Checking the External Blocking and Reset Functions
43
Testing the External Blocking with Block/Trip Function
44
Test of the CB Failure Protection
44
Primary Injection Test
44
Maintenance
45
Technical Data
46
Measuring Circuits
46
Common Data
46
Setting Ranges and Steps
47
Systemparameter
47
Overload Protection
48
Over Current Time Protection
49
Earth Fault Protection
50
Earth Fault Protection (ER-Type)
50
Determination of Earth Fault Direction (Mrl3-ITER)
51
Blocktrip - Time
51
Switch Failure Protection
51
Interface Parameter
51
Parameter for the Fault Recorder
51
Tripping Characteristics
52
Thermal Characteristic
52
Preload Factor
53
Inverse Time over Current Protection Relay
54
Tripping Characteristics
55
Output Relays
58
Order Form
59

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User Manuals: Woodward MRI3-ITE Time Overcurrent Relay

Woodward MRI3-ITE Manual (64 pages)

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