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Prototype Development of Automated Ring Main Unit System TNB Distribution Presentation Meeting.

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Presentation on theme: "Prototype Development of Automated Ring Main Unit System TNB Distribution Presentation Meeting."— Presentation transcript:

1 Prototype Development of Automated Ring Main Unit System TNB Distribution Presentation Meeting

2 Project Background

3 RMUs Presently Used What is an RMU? Who operates it? Are there safety concerns?

4 RMU Operation Opening/closing of the load break switch or earthing switch:  Key/lever  Pushed to overcome spring force  Turn 90˚ at ~20 N.m (clockwise or counter- clockwise depending on usage) Who operates it? Are there safety concerns? Can it function remotely?

5 Project Objectives To design a motorized retrofit for automatic operation of (F&G*) Ring Main Unit (RMU) as per technical specifications provided by TNB Distribution.

6 Customer Requirements ??

7 Deliverables A prototype RMU Motorization Unit for operation of manually operated F&G* Ring Main Units.

8 Project Impact The proposed system would be able to switch the RMU breakers in a safe manner via remote control. Reduce downtime via remote operation and enhance the safety of TNB’s personnel by eliminating the need for manual operation of the RMU.

9 Project Methodology Stages of prototype development: 1.Torque and dimension measurements 2.Study of Actuation Mechanism 3.Grip frame design and material selection 4.Sensors & Alignment 5.Power & Controls 6.Testing & Trials

10 RMU Automation Operational Block Diagram M1 M2 M3 Manual push relays & Indicators Microcontroller Motor Driver w max current limit 28VDC 10A SCADA Auto/Remote Local/Manual CW Local/Manual CCW Load switch limit switch Power Supply Unit CW/CCW control signal

11 Components List 1.Power supply unit 2.Grip Frame 3.Motor Mounting Rails Assembly 4.Programmable Logic Controller 5.Motor Driver/controller 6.Auto/Manual Cam Selector Switch 7.Push Power Relays 8.Limit/position Sensors 9.Geared DC Motors 10.Miscellaneous

12 Features 1.Light-weight (require only one person for mounting & installation) 2.Simple gripping and holding mechanism 3.Ready for remote and local operation 4.Completely detachable motor unit for manual operation 5.Continuous Breaker load switch status indicator 6.Motor over-current protection 7.Response time of < 5 seconds 8.Motor interlock operation

13 Estimated Costing* per 2+1 RMU (3 motor set) Mechanical works (motor mounting and grip frame) – ~ RM1300 Geared motors – 3 x RM700 Controller – RM400 Motor driver – RM700 Sensors and electronics components – RM400 Power Supply Unit – RM900 (for prototype only) TOTAL COST – ~RM5000 (without PSU) * For large quantities of order

14 Initial survey and testing in ILSAS Initial motor selection Load breaker switch sizing

15 Motor mount and torque testing Continuation of motor selection

16 DC Motor on mount Testing torque capability

17 A closer look at the Motor Mounting Rail Assembly

18 Further testing on actual F&G RMU

19 Procurement of Test Bed RMU

20 Installation of Mount on Grip Frame

21 Motor mount installed on grip frame on an F&G RMU

22 Rear view of gripping clamp


24 Grip Frame

25 Detachable Motor Mounting Rail Assembly

26 Motor Selection and Testing – ILSAS 30VDC Circuit Breaker Motor

27 Gearbox Failure – Specified Torque 25N-m

28 Switching Key Failure

29 Testing on RMUs in UNITEN

30 Play Video Motor Mounting Rail Assembly

31 Play Video Motor Mounting Rail Assembly

32 Thank you. Questions & Discussions

33 Timeline Month 1Month 2Month 3Month 4 Actuation Mechanism Assy Fabrication and assy Test and Trials Cross Slide Traversing Assy Design and Procurement Fabrication Actuation and Cross slide integration Test and Trials Sensors & Alignment SelectionProcurementIntegrationTest and Trials Power & Controls System Selection and Procurement ProgrammingTest and Trials Networking and Communication PDSB

34 Uniten Procurement Procedures Requestor 1. Fill PR Form 2. Prepare Tech. Spec. Officer-in-Charge approves requirements Finance verifies availability of budget Approval of PR Approving Authority (PR) : ≤ RM 5K - Dean ≤ RM 100 K - TNC > RM 100 K - NC Call for Quotation / Tender Evaluation with Endorsement by Dean / HOS Approval / Award ≤ RM 1 K - Dean ≤ RM 5 K - College Tender Committee ≤ RM 10 K - NC ≤ RM 500 K - TNC(P) Tender Committee Create PO ≤ RM 5 K : Procurement Manager ≤ RM 100 K : TNC(P) > RM 100 K : NC Supplier delivers product / provide service Quotation Value: ≤ RM 100 K Float period: days Min. : 3 companies Tender Value: > RM 100 K Float period: days Min. : 5 companies

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