Related Manuals for GE MVAX 11
Summary of Contents for GE MVAX 11
- Page 1 Grid Solutions MVAX 11, 12, 21, 31, 91 Technical Manual Trip Circuit Supervision Relay Publication reference: R8010RB...
- Page 3 SAFETY SECTION...
- Page 5 STANDARD SAFETY STATEMENTS AND EXTERNAL LABEL INFORMATION FOR General Electric EQUIPMENT INTRODUCTION This Safety Section and the relevant equipment documentation provide full information on safe handling, commissioning and testing of this equipment. This Safety Section also includes reference to typical equipment label markings.
- Page 6 equipment documentation gives instructions for its installation, commissioning, and operation. However, the manuals cannot cover all conceivable circumstances or include detailed information on all topics. In the event of questions or specific problems, do not take any action Contact the appropriate General Electric without proper authorization.
- Page 7 SYMBOLS AND LABELS ON THE EQUIPMENT For safety reasons the following symbols which may be used on the equipment or referred to in the equipment documentation, should be understood before it is installed or commissioned. Symbols Caution: refer to equipment documentation Caution: risk of electric shock Protective Conductor (*Earth) terminal Functional/Protective Conductor (*Earth)
- Page 8 INSTALLING, COMMISSIONING AND SERVICING Equipment connections Personnel undertaking installation, commissioning or servicing work for this equipment should be aware of the correct working procedures to ensure safety. The equipment documentation should be consulted before installing, commissioning, or servicing the equipment. Terminals exposed during...
- Page 9 otherwise required by local or country wiring regulations. The protective conductor (earth) connection must be low- inductance and as short as possible. All connections to the equipment must have a defined potential. Connections that are pre-wired, but not used, should preferably be grounded when binary inputs and output relays are isolated.
- Page 10 Equipment operating conditions The equipment should be operated within the specified electrical and environmental limits. Current transformer circuits Do not open the secondary circuit of a live CT since the high voltage produced may be lethal to personnel and could damage insulation.
- Page 11 Service Manual R8010RB MVAX Page 1/24 TYPE MVAX TRIP CIRCUIT SUPERVISION RELAY...
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Page 13: Table Of Contents
0.075/0.2mm (0.003"/0.008"). 4.1.2 Nominal armature gap open. Contact settings MVAX 11 (Unit RL 1 .) 4.2.1 MVAX 12, MVAX 21, 31 (Unit RL 1 .) 4.2.2 MVAX 21 (Unit RL 2 ), MVAX 31 (Units RL 2 and RL 3 ) 4.2.3... - Page 14 R8010RB Page 4/24 MVAX 4.3.1 Hand reset reverse flags 4.3.2 Self reset reverse flags PROBLEM ANALYSIS Failure to operate/reset Output contacts not changing state. Reset time on MVAX 12 too short. SPARES Repairs COMMISSIONING TEST RECORD FIGURES Figure 1: Circuit and application diagram – trip supervision relay Figure 2: Supervision of interposing control relay type MVAW Figure 3:...
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Page 15: Installation
An outline diagram is normally supplied showing panel cut-outs and hole centers. For individually mounted relays these dimensions will also be found in Publications R6103 MVAX 11 and R6010 MVAX 12, 21, 31 and 91. Publication R7012 is a Parts Catalogue and Assembly Instructions. This document will be useful when individual relays are to be assembled as a composite rack or panel mounted assembly. -
Page 16: Commissioning
1000V. Accessible terminals of the same circuit should first be strapped together. Deliberate circuit earthing links, removed for the tests, subsequently must be replaced. MVAX 11 With MVAX 11 relays check that all wiring complies to the appropriate application diagram to ensure that the relay is wired correctly. MVAX 12 With MVAX 12 relays, check that terminal 13 of the relay case is wired to the POSITIVE of the trip supply. -
Page 17: Mvax
* S/R reverse flag Electrical operation tests 2.7.1 MVAX 11 only Isolate the MVAX from the trip supply batteries by removing fuses/links as necessary. Connect a supply across relay terminals 21 – 27 and supply the relevant voltage from the list below. -
Page 18: Mvax 21 Only
R8010RB Service Manual Page 8/24 MVAX Apply 75% of the relay’s lower voltage of the voltage rating range. Check that the relay operates satisfactorily and that the flag indication can be reset. Reduce the voltage slowly until the relay drops-off. Check that this occurs between 25% to 40% of the lower voltage rating, as indicated below: V rating range 24/27... -
Page 19: Mvax 31 (Mvax 91 - 3 Separate Mvax 31'S In A Size 8 Case)
Service Manual R8010RB MVAX Page 9/24 Relay V. rating 24/27 30/34 48/54 110/125 220/250 Ref. V. for tolerance Test 1 Hand reset Full volts Full volts 35.3 – 38.8 29.1 – 36.3 24.9 – 32.5 (Alarm flag (no ext. R) (no ext. -
Page 20: Mvax 31 04 Only
R8010RB Service Manual Page 10/24 MVAX Test 6 With the circuit breaker closed, operate, or simulate operation of the associated trip relay. Ensure the CB trips but ensure that RL1 of the MVAX does not operate. The MVAX relay units are slugged on drop-off to prevent mal-operation during the transition period. -
Page 21: Mvax
Service Manual R8010RB MVAX Page 11/24 Test 4 With the circuit breakers closed, operate or simulate operation of the associated trip relays. Note that the circuit breakers trip but ensure that RL1 of the MVAX does not operate. RL1, RL2(1) and RL2(2) units are slugged on drop-off to prevent mal-operation during the transition period. -
Page 22: Mvax
R8010RB Service Manual Page 12/24 MVAX Test 6 With the circuit breaker closed, operate, or simulate operation of the associated trip relay. Ensure the CB trips but ensure that RL1 of the MVAX does not operate. The MVAX relay units are slugged on drop-off to prevent mal-operation during the transition period. -
Page 23: Maintenance
4.1.1 With the armature closed the clearance between the back of the armature and the back stop should be 0.075/0.2mm (0.003"/0.008"). 4.1.2 Nominal armature gap open. MVAX 11 Unit RL 1.38mm (0.055") MVAX 12 1.5mm (0.060") MVAX 21, 31 and 91... -
Page 24: Contact Settings
MVAX Contact settings 4.2.1 MVAX 11 (Unit RL With the armature closed onto a 0.25mm (0.011") feeler gauge the make contacts should be closed, but should be open using a 0.38mm (0.015") feeler gauge. Force to just close the break contacts: 20/25 grams. -
Page 25: Failure To Operate/Reset
Service Manual R8010RB MVAX Page 15/24 PROBLEM ANALYSIS Failure to operate/reset Check diagram for correct input connections. Check the correct voltages are applied. Ratings values are shown on module front plate. Ensure power supply capable supplying necessary power. Ensure correct series resistors are used and connected to correct relay terminals. Flag spring may have been distorted and is holding the armature open or closed. -
Page 26: Figure 1: Circuit And Application Diagram - Trip Supervision Relay
R8010RB Service Manual Page 16/24 MVAX Figure 1: Circuit and application diagram – trip supply supervision relay... -
Page 27: Figure 2: Supervision Of Interposing Control Relay Type Mvaw
Service Manual R8010RB MVAX Page 17/24 Push button MVAW Interposing control relay MVAX 11 Supervisory relay P1077ENa Figure 2: Supervision of interposing control relay type MVAW MVAJ Tripping relay Protective relay contact Supervision relay MVAX 11 P1078ENa Figure 3: Supervision of tripping relay type MVAJ... -
Page 28: Figure 4: Circuit Diagram - Mvax21 Trip Circuit Supervision Relay Without Preclosing
R8010RB Service Manual Page 18/24 MVAX P1079ENa Figure 4: Circuit diagram – MVAX21 trip circuit supervision relay without preclosing supervision... -
Page 29: Figure 5: Application Diagram - Mvax21 Trip Circuit Supervision Relay Without Preclosing
Service Manual R8010RB MVAX Page 19/24 P1080ENa Figure 5: Application diagram – MVAX21 trip circuit supervision relay without preclosing supervision... -
Page 30: Figure 6: Circuit Diagram - Mvax31 Trip Circuit Supervision Relay With Preclosing
R8010RB Service Manual Page 20/24 MVAX P4066ENa Figure 6: Circuit diagram – MVAX31 trip circuit supervision relay with preclosing supervision... -
Page 31: Figure 7: Application Diagram - Mvax31 Trip Circuit Supervision Relay With Preclosing
Service Manual R8010RB MVAX Page 21/24 P4067ENa Figure 7: Application diagram - MVAX31 trip circuit supervision relay with preclosing supervision... - Page 32 R8010RB Service Manual Page 22/24 MVAX P4068ENa...
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Page 33: Commissioning Test Record
Service Manual R8010RB MVAX Page 23/24 COMMISSIONING TEST RECORD Trip Supply Supervision Relay Type MVAX 11 – Type MVAX 12 – Type MVAX 21 – Type MVAX 31 – Type MVAX 91 (delete as appropriate) Date Station Circuit Reay Model No... - Page 34 R8010RB Service Manual Page 24/24 MVAX Test results: MVAX 21 relay Test 2.7.3 Measured trip supply alarm supply CB open Volts across terminals 13 and 14 Volts across terminals 21 and 28 CB closed Volts across terminals 13 and 14 (tick) (tick) Test results:...
- Page 35 REPAIR / MODIFICATION RETURN AUTHORIZATION FORM – RMA FORM FIELD ONLY TO BE FILLED IN BY A GE GRID Automation REPRESENTATIVE Date : RMA Reference ACT Reference (M): Repair Center address to Ship the Unit: Goods receiving deck UK Grid Solution LTD...
- Page 36 5. Return Packaging Standards (ALL PRODUCTS) 1. Please ensure the device is clean, no sharp edges are exposed and the device is in a suitable condition to be handled. Relay’s returned without cases should be placed into Anti-Static Bags and sealed to protect hyper-sensitive components.
- Page 38 Imagination at work Grid Solutions St Leonards Building Redhill Business Park Stafford, ST16 1WT, UK +44 (0) 1785 250 070 www.gegridsolutions.com/contact © 2020 General Electric. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances.