Manual MRR1 SEG Electronics GmbH
DOK-TD-MRR1, Rev. B 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
