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Issue H

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Contents

CONTENTS ..................................................................................................................................................................... I

1. INTRODUCTION...................................................................................................................................................... 2

2. APPLICATION.......................................................................................................................................................... 3

3. FEATURES AND CHARACTERISTICS ............................................................................................................... 3

4. DESIGN ...................................................................................................................................................................... 4

4.1 CIRCUIT DIAGRAMS ................................................................................................................................................ 4

4.1.1 Analogue input circuits................................................................................................................................... 5

4.1.2 Output relays................................................................................................................................................... 5

4.1.3Remote data communication............................................................................................................................ 5

5. FRONT PANEL......................................................................................................................................................... 6

5.1 ALPHANUMERIC DISPLAY ....................................................................................................................................... 6

5.1.2. Mode 2 Settings.............................................................................................................................................. 8

5.1.3. Fault indication ............................................................................................................................................. 9

5.2. LED indicators.................................................................................................................................................. 9

5.3. Push buttons...................................................................................................................................................... 9

6. WORKING PRINCIPLES...................................................................................................................................... 10

6.1 ANALOGUE CIRCUITS ............................................................................................................................................ 10

6.2 DIGITAL CIRCUITS ................................................................................................................................................. 10

7. OPERATION AND SETTING ............................................................................................................................... 11

7.1 LAYOUT OF THE CONTROL ELEMENTS ................................................................................................................... 11

7.2. RELAY DISPLAY AND SETTING PROCEDURE......................................................................................................... 11

7.2.1. Display mode(1)........................................................................................................................................... 11

7.2.2. Setting Mode (2)........................................................................................................................................... 11

7.3 SETTING PROCEDURE ............................................................................................................................................ 13

7.3.1. t6x Setting .................................................................................................................................................... 13

7.3.2. Speed Switch ................................................................................................................................................ 13

7.3.3. Full Load Current Setting I FLC ................................................................................................................ 13

7.3.4. CT Primary Setting ...................................................................................................................................... 13

7.3.5. Hot/Cold Ratio Setting................................................................................................................................. 14

7.3.6. Thermal Overload Pre-Alarm Setting.......................................................................................................... 14

7.3.7. Number of Starts per Hour. ......................................................................................................................... 14

7.3.8. Start Inhibit Time ......................................................................................................................................... 14

7.3.9. Earth Fault Current ..................................................................................................................................... 14

7.3.10. Earth Fault trip Time ................................................................................................................................. 15

7.3.11. Unbalance Current .................................................................................................................................... 15

7.3.12. Undercurrent Setting ................................................................................................................................. 16

7.3.13. Undercurrent Time..................................................................................................................................... 16

7.3.14. High Set Overcurrent................................................................................................................................. 16

7.3.15. High Set Overcurrent Time ........................................................................................................................ 16

7.3.16 Low Set Overcurrent ................................................................................................................................... 16

7.3.17 Low Set Overcurrent Time .......................................................................................................................... 16

7.3.19 Set Password............................................................................................................................................... 16

7.3.20 Serial Link Address, RSnn........................................................................................................................... 16

Brand	P&B
Model	MPR3E5
Category	Relays
Language	English

P&B MPR3E5 User Manual

Table of Contents

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P&B MPR3E5 Specifications