Manual MRR1 GB
Woodward
DOK-TD-MRR1 Rev.A
3
Contents
1.
Introduction and application ....................................................................... 4
2.
Features and characteristics ...................................................................... 4
3.
Design ........................................................................................................... 5
3.1
Connections ........................................................................................................................ 5
3.1.1
Output relays ................................................................................................................... 5
3.1.2
Blocking input .................................................................................................................. 5
3.1.3
External reset input ......................................................................................................... 5
3.2
Display ................................................................................................................................. 6
3.3
LEDs .................................................................................................................................... 7
4.
Working principle ......................................................................................... 8
4.1
Rotor earth fault protection .................................................................................................. 8
4.2
Excitation current supervision ........................................................................................... 10
5.
Operation and settings .............................................................................. 12
5.1
Setting and measuring values ........................................................................................... 12
5.2
Setting procedure .............................................................................................................. 13
5.2.1
Pickup value and tripping delay .................................................................................... 13
5.2.2
Setting of slave address ................................................................................................ 13
5.2.3
Reset ............................................................................................................................. 14
5.3
Blocking of protective functions and assignment of the output relays ............................ 15
5.3.1
Blocking of protective functions ..................................................................................... 15
5.3.2
Assignment of the output relays .................................................................................... 16
6.
Relay testing and commissioning ............................................................ 17
6.1
Power-On .......................................................................................................................... 17
6.2
Testing the output relays ................................................................................................... 17
6.3
Checking the set values .................................................................................................... 17
6.4
Secondary injection test .................................................................................................... 17
6.4.1
Test equipment.............................................................................................................. 17
6.4.2
Example of a test circuit ................................................................................................ 18
6.4.3
Checking the insulation measuring circuit ..................................................................... 18
6.4.4
Checking the excitation current circuit .......................................................................... 18
6.4.5
Checking the pickup value and reset value .................................................................. 19
6.4.6
Checking the tripping delay ........................................................................................... 19
6.5
Real injection test .............................................................................................................. 19
6.6
Maintenance ...................................................................................................................... 19
7.
Technical data ............................................................................................ 20
7.1
Measuring input circuits .................................................................................................... 20
7.2
Common data .................................................................................................................... 20
7.3
System data and test specifications .................................................................................. 20
7.4
Setting ranges and steps .................................................................................................. 21
7.5
Order Form ........................................................................................................................ 22
