Eaton VR+ Series Instruction Book
  1. Manuals
  2. Brands
  3. Eaton Manuals
  4. Circuit breakers
  5. VR+ Series
  6. Instruction book

Eaton VR+ Series Instruction Book

Replacement circuit breaker
Hide thumbs Also See for VR+ Series:
Table of Contents

Advertisement

Quick Links

Download this manual
Instruction Book IB182923EN
Effective
September 2018
+
AMH-4.76-VR
+
VR-Series
Replacement Circuit Breaker
AMH-4.76-VR + 1200A Shown

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the VR+ Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Eaton VR+ Series

Summary of Contents for Eaton VR+ Series

  • Page 1 Instruction Book IB182923EN Effective September 2018 AMH-4.76-VR VR-Series Replacement Circuit Breaker AMH-4.76-VR + 1200A Shown...
  • Page 2 SHALL NOT BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES. In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or other-wise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information, recommendations and descriptions contained herein.

  • Page 3: Table Of Contents

    4.6 SECONDARY CONNECTION BLOCK 7.1 GENERAL 4.7 INTERLOCKS 7.2 ORDERING INSTRUCTIONS 4.7.1 ANTI-CLOSE INTERLOCK 4.7.2 RACKING SYSTEM TRIP AND SPRING RELEASE INTERLOCKS 4.7.3 ACTIVE INTERLOCK 4.7.4 SHUTTER INTERLOCK 4.8 MISCELLANEOUS ITEMS 4.8.1 OPERATIONS COUNTER 4.8.2 MOC OPERATOR Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 4: Section 1: Introduction

    FOR LONG USEFUL LIFE OF THE CIRCUIT BREAKERS. IT IS FURTHER RECOMMENDED THAT THE INSTALLATION BE PERFORMED BY A EATON CORPORATION TRAINED ENGINEER OR TECHNICIAN. VR-SERIES BREAKERS ARE PROTECTIVE DEVICES, AS SUCH, THEY ARE MAXIMUM RATED DEVICES.
  • Page 5 AM4.16-VR + 41 AMH4.76-250 4.76 1200 / 2000 1.00 78 / 132 All circuit breakers have a 3 second short-time and 3-cycle interrupting ratings. Non-standard rating. Requires bus bracing study and additional switchgear bracing. Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 6 Replacement Circuit Breaker Tablt 2. AMH-4.76-VR + Dimtnsions Existing Breaker Rated Continuous Current at 60 Hz Breaker Type (Amps) AMH-4.76-VR + 250/41 1200 / 2000 56.02 23.44 7.00 44.42 40.07 7.50 18.38 26.50 8.50 42.00 Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 7: Section 2: Safe Practices

    Always rtmovt tht mainttnanct tool from tht brtaktr afttr • charging tht closing springs. Brtaktrs art tquipptd with saftty inttrlocks. Do not dtftat • thtm. This may rtsult in dtath, bodily injury or tquipmtnt damagt. Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 8: Section 3: Receiving, Handling, And Storage

    File claims immediately with the carrier if safe distance away from the breaker while lifting and moving. damaged or loss is detected and notify the nearest Eaton’s Electrical Services & Systems office. Figurt 3.2. Lifting AMH-4.76-VR +...

  • Page 9: Amh-4.76-Vr + Approximate Weights

    Indoor storage should be in a building with sufficient heat and circulation to prevent condensation. If the building is not heated, the same general rule for heat as for outdoor storage should be applied. Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 10 Figurt 3.3. Front Exttrnal Vitw of AMH-4.76-VR + (AMH-4.76-VR + 250-1200A Shown) Front External View Manual Charging Socket Guide Bar Push to Open Button Push To Close Button Breaker Contacts Indicator MOC Actuator Racking Access Door Springs Charge/Discharge Position Indicator Foot Pedal Operations Counter Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 11 Figurt 3.4. Rtar Exttrnal Vitw of AMH-4.76-VR + (AMH-4.76-VR + 250-1200A Shown) Rear External View Shutter Actuator SURE CLOSE Spring Secondary Disconnect Primary Disconnect Guide Rail Ground Contact Racking Screw Racking Access Door Interlock Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 12: Section 4: Description And Operation

    The purpose of the contact erosion indicator is to monitor the erosion of the vacuum interrupter contacts, which is very minimal over time with Eaton vacuum interrupters utilizing copper-chrome contact material. The VR-Series + vacuum interrupter assembly incorporates both the original vacuum interrupter erosion indicator and the contact-spring wipe into one all-encompassing indicator.

  • Page 13: Contact Wipe And Stroke

    Circuit breaker closed, closing springs discharged. (unlatched). After the closing springs become charged, the trip latch d. Circuit breaker closed, closing springs charged. snaps into the fully reset or latched position (Figure 4.6.b) Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 14: Tripping Operation

    (close and open springs factory measurements and field inspections. Circuit breaker timing discharged). can be measured by service personnel using available equipment before installation and in conjunction with regular maintenance Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 15: Active Interlock

    WARNING IF THE ACTIVE INTERLOCK FAILS TO OPERATE AS DEFINED IN THE ABOVE SECTION, CONTACT AN EATON REPRESENTATIVE IMMEDIATELY. 4.7.4 SHUTTER INTERLOCK Each GE AMH-4.76 circuit breaker compartment is equipped with a shutter to shield the high voltage stabs in the cubicle when the breaker is not in the cubicle.
  • Page 16 Protective Relay ‘C’ and ‘NO’ Brown Switch Open in all except between ‘Test’ Terminal Block or Accessible Terminal and’Connect’ positions Position Switch 1 Position Switch 2 Closed in all except between ‘Test’ and ‘Connect’ positions Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 17 LH Closing Spring Spring Release Assembly Manual Charge Socket Motor Cutoff Switch Shunt Trip Assembly Ratchet wheel Latch Check Switch (Rear) RH Closing Spring Operations Counter Closing Cam Reset / Opening Spring Charging Motor Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 18 Cam Shaft Spring Release (Close) Clapper Closing Spring Spring Release Latch (Close Roller) Spring Release (Close) Coil Holding Pawl (Electrical Charging) / Drive Pawl (Electrical Charging) / Drive Pawl (Manual Charging) Holding Pawl (Manual Charging) Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 19 4.9.d. Breaker Closed and Closing Spring Charged Charging Schematic Main Link Roller Closing Cam Trip Bar “D” Shaft Main Link Cam Shaft Trip Latch Reset Spring Operating Rod Banana Link Shunt Trip Lever Pole Shaft Trip latch Shunt Trip Coil Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 20: Section 5: Inspection & Installation

    If any discrepancies exist, notify Eaton’s Electrical Engineering Services & Systems for resolution prior to proceeding. m WARNING MEASUREMENTS AND ADJUSTMENTS SHOULD NEVER BE ATTEMPTED m WARNING IN AN ENERGIZED STRUCTURE.

  • Page 21: Manual Operation Check

    WARNING EXAMINE THE INSIDE OF THE CELL BEFORE INSERTING THE BREAKER FOR EXCESSIVE DIRT OR ANYTHING THAT MIGHT INTERFERE WITH THE CIRCUIT BREAKER TRAVEL. Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 22: Description Of Operational Positions

    Figurt 5.4. AMH-VR + in tht Ttst Position 5.9 DESCRIPTION OF OPERATIONAL POSITIONS This section of the instructional manual covers the AMH line of Eaton vacuum replacement breakers. The AMH-4.76-VR + has four basic operational positions: (1) Circuit breaker withdrawn from the cell.

  • Page 23: Removal Procedure

    If the circuit breaker is to be withdrawn, press the interlock pedal while pulling the breaker out of the cell using the handles on the front of the circuit breaker. (Figure 3.3) Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 24: Section 6: Inspection & Maintenance

    If < 0.6 Contact the PBC ™ ™ at 1-877-276-9379 otte: Contact Eaton for any mtchanism mainttnanct othtr than adjustmtnt or rtplactmtnt of control compontnts. 8 - 32 10 - 32 .25 - 20 .31 - 18 .38 - 16 .50 - 13...

  • Page 25: Vacuum Interrupter Integrity Test

    ALL OPERATING PERSONNEL STAND AT LEAST ONE METER AWAY IN FRONT OF THE CIRCUIT BREAKER. m WARNING DC HI-POTENTIAL TESTS ARE NOT RECOMMENDED BY EATON. DO NOT APPLY DC AT ANY LEVEL TO VR-SERIES POWER CIRCUIT BREAKERS With the circuit breaker open and securely sitting on the floor, connect all top/front primary studs (bars) together and the high potential machine lead.

  • Page 26: Insulation

    The recommendations and information contained herein are based To check the primary circuit resistance: • on Eaton experience and judgment, but should not be considered to Remove the circuit breaker from the circuit breaker • be all-inclusive or covering every application or circumstance which compartment may arise.
  • Page 27 (Charging handle). Continue charging the closing springs until a opening. If it is not aligned, this indicates a problem with the “click” is heard and the status indicator shows ‘Charged’ (Figure circuit breaker - stop the test and consult the factory. 6.6). Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 28 Figurt 6.8. With Marktr in Holt “C” , Whilt Closing Circuit Brtaktr Figurt 6.6. Manually Charging Closing Springs Figurt 6.9. Polt Shaft Locattd On Ltft Sidt Of Circuit Brtaktr Figurt 6.7. Makt a Cltar and Htavy Mark Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 29 *Note: Use the center of the marker diameter to determine "X" distance Marker If “X” is > 0.6”, then the performance is satisfactory. 8.0 to 10 Inches "X" Inches CloSure Distance Figurt 6.12. Evaluatt tht CloSurt™ Ptrformanct Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 30: Maintenance Recommendation

    After a ten year service interval or when ten thousand operations have been reached, contact your local Eaton representative to arrange for factory recertification. During the ten year service interval, no supplemental lubrication with light machine oil is recommended.
  • Page 31 • Control power (CS/T Switch, remains made) Mechanism • Trip Coil Clapper (Not resetting) • Trip Bar or Trip Latch (Poor engagement of mating or worm surfaces) • Trip Bar Reset Sprint (Loss of torque) Instruction Book IB182923EN September 2018 www.eaton.com...

  • Page 32: Section 7: Replacement Parts

    Each customer should develop his own level based on operating experience. However, when c. Send all orders or correspondence to the nearest Eaton sales establishing a new operating record, it is a good practice to stock office or contact the PBC direct at 1-877-276-9379.
  • Page 33 AMH-4.76-VR VR-Series Replacement Circuit Breaker Instruction Book IB182923EN September 2018 www.eaton.com...
  • Page 34 Eaton 1000 Eaton Boulevard Cleveland, OH 44122 United States Eaton.com © 2018 Eaton All Rights Reserved Eaton is a registered trademark. Printed in USA Publication No. IB182923EN All trademarks are property September 2018 of their respective owners.

This manual is also suitable for:

Amh-4.76-vr+

Table of Contents