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Instruction Book    

IB182923EN   September 2018   www.eaton.com

AMH-4.76-VR

+

VR-Series

 Replacement Circuit Breaker

SECTION 3:   RECEIVING, HANDLING, AND 
STORAGE

VR- circuit breakers are subjected to complete factory 

production tests and inspection before being packed. They are 

shipped in packages designed to provide maximum protection to the 

equipment during shipment and storage and at the same time to 

provide convenient handling. Accessories such as the maintenance 

tool, cell code plate, (if applicable) etc. are shipped with the breaker 

(Figure 3.1).

3.1   RECEIVING

Until the breaker is ready to be delivered to the switchgear site 

for installation, DO NOT remove it from the shipping crate. If the 

breaker is to be placed in storage, maximum protection can be 

obtained by keeping it in its crate.
Upon receipt of the equipment, inspect the crates for any signs of 

damage or rough handling. Open the crates carefully to avoid any 

damage to the contents. Use a nail puller rather than a crow bar 

when required.
When opening the crates, be careful that any loose items or 

hardware are not discarded with the packing material. Check the 

contents of each package against the packing list.
Examine the breaker for any signs of shipping damage such as 

broken, missing or loose hardware, damaged or deformed insulation 

and other components. File claims immediately with the carrier if 

damaged or loss is detected and notify the nearest Eaton’s Electrical 

Services & Systems office.

Tools and Accessories

Mainttnanct Tool / Manual Chargt Handlte:

  This tool is used 

to manually charge the closing spring. One maintenance tool is 

provided with each vacuum unit replacement breaker. (Style# 

94C9506G01)

Racking Handlte:   

The racking handle is used to drive the racking 

mechanism which moves the circuit breaker into and out of the cell. 

The original OEM racking handle will interface with the VR- 

replacement breaker racking mechanism and is therefore not 

provided as part of the vacuum replacement breaker. A replacement 

racking handle may be purchased directly from Eaton. (Style# 

5D11330G01)

3.2   HANDLING

m

 WARNING

DO NOT USE ANY LIFTING DEVICE AS A PLATFORM FOR PERFORMING 

MAINTENANCE, REPAIR OR ADJUSTMENT OF THE BREAKER OR FOR 

OPENING, CLOSING THE CONTACTS OR CHARGING THE SPRINGS. THE 

BREAKER MAY SLIP OR FALL CAUSING SEVERE PERSONAL INJURY. 

ALWAYS PERFORM MAINTENANCE, REPAIR AND ADJUSTMENTS ON A 

WORKBENCH CAPABLE OF SUPPORTING THE BREAKER TYPE. 

VR- breaker shipping containers are designed to be handled 

either by use of an overhead lifting device or by a fork lift truck. If 

containers must be skidded for any distance, it is preferable to use 

roller conveyors or individual pipe rollers.

Once a breaker has been inspected for shipping damage, it is best 

to return it to its original shipping crate until it is ready to be installed 

in the Metal-Clad Switchgear.

When the breaker is ready for installation, a lifting harness in 

conjunction with an overhead lift or portable floor lift can be used to 

move the breaker. If the breaker is to be lifted, position the lifting 

device over the breaker and insert the lifting harness hooks into the 

breaker side lifting points and secure (lifting straps should have at 

least a 1000lbs lift capacity over the approximate breaker weight). Be 

sure the hooks are firmly attached before lifting the breaker. Stand a 

safe distance away from the breaker while lifting and moving.

Figurt 3.1.a. Typical Manual Chargt Handlt

Figurt 3.1.b. Rotary Racking Handlt

Figurt 3.2. Lifting AMH-4.76-VR+ 

Summary of Contents for VR+ Series

Page 1: ...September 2018 Instruction Book IB182923EN AMH 4 76 VR VR Series Replacement Circuit Breaker Effective AMH 4 76 VR 1200A Shown...

Page 2: ...f further information is required an Eaton sales office should be consulted Sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling po...

Page 3: ...NTERLOCKS 14 4 7 1 ANTI CLOSE INTERLOCK 14 4 7 2 RACKING SYSTEM TRIP AND SPRING RELEASE INTERLOCKS 14 4 7 3 ACTIVE INTERLOCK 15 4 7 4 SHUTTER INTERLOCK 15 4 8 MISCELLANEOUS ITEMS 15 4 8 1 OPERATIONS C...

Page 4: ...important that this installation and maintenance instruction booklet be read and followed closely to achieve optimum performance and a long useful circuit breaker life in its application 1 1 VISUAL IN...

Page 5: ...ted Voltage Factor Rated Withstand ANSI Test Voltage Rated Short Circuit Maximum Sym Interrupting Capability Closing and Latching Momentary Capabilities kV MVA Amps K Low Freq kV RMS Impulse kV Peak I...

Page 6: ...R VR Series Replacement Circuit Breaker E H I G F J H D B C C A Table 2 AMH 4 76 VR Dimensions Breaker Type Existing Breaker Rated Continuous Current at 60 Hz Amps A B C D E F G H I J AMH 4 76 VR 250...

Page 7: ...injury and or property damage Do not work on a breaker with the secondary test coupler engaged Failure to disconnect the test coupler could result in an electrical shock leading to death personnel inj...

Page 8: ...ker Style 94C9506G01 Racking Handle The racking handle is used to drive the racking mechanism which moves the circuit breaker into and out of the cell The original OEM racking handle will interface wi...

Page 9: ...d indicator Push the manual trip button The breaker will trip as shown by the breaker contacts open green indicator After completing this initial check leave the closing springs discharged and breaker...

Page 10: ...ernal View of AMH 4 76 VR AMH 4 76 VR 250 1200A Shown Front External View 1 Manual Charging Socket 5 Guide Bar 9 Push to Open Button 2 Push To Close Button 6 Breaker Contacts Indicator 10 MOC Actuator...

Page 11: ...ment Circuit Breaker Figure 3 4 Rear External View of AMH 4 76 VR AMH 4 76 VR 250 1200A Shown Rear External View 1 Shutter Actuator 4 SURE CLOSE Spring 7 Secondary Disconnect 2 Primary Disconnect 5 Gu...

Page 12: ...R ASSEMBLY Each vacuum interrupter assembly also referred to as pole unit is assembled at the factory as a unit to assure correct dimensional relationships between working components Three interrupter...

Page 13: ...ND FINGERS AWAY FROM CIRCUIT BREAKER S INTERNAL PARTS WHILE THE CIRCUIT BREAKER CONTACTS ARE CLOSED OR THE CLOSING SPRINGS ARE CHARGED THE CIRCUIT BREAKER CONTACTS MAY OPEN OR THE CLOSING SPRINGS DISC...

Page 14: ...ct opens the SR circuit so that even though the circuit breaker would subsequently open it could not be reclosed before CS C was released and remade This is the anti pump function 4 5 1 TIMING The ope...

Page 15: ...ted by the circuit breaker shutter actuator that opens the shutter as the circuit breaker is racked into the circuit breaker compartment and closes the shutter as the circuit breaker is racked out of...

Page 16: ...pt between Test and Connect positions OPERATION C and NO C and NC C and NO C and NO C and NC C and NO Brown Switch Black Switch Black Switch Brown Switch SWITCH TERMINAL LS1 bb LS2 aa LS2 bb LC PS1 PS...

Page 17: ...ront Faceplate Removed VR Series Circuit Breaker Element Mechanism 1 LH Closing Spring 5 Spring Release Assembly 9 Manual Charge Socket 2 Motor Cutoff Switch 6 Shunt Trip Assembly 10 Ratchet wheel 3 L...

Page 18: ...nkage 1 Spring Release Close Latch 6 Ratchet Wheel 11 Anti Close Interlock 2 Pole Shaft 7 Spring Crank 12 Motor Ratchet Lever 3 Closing Spring Fixed End 8 Cam Shaft 13 Spring Release Close Clapper 4 C...

Page 19: ...Closing Spring Discharged 4 9 c Breaker Closed and Closing Spring Discharged 4 9 b Breaker Open and Closing Spring Charged 4 9 d Breaker Closed and Closing Spring Charged Charging Schematic 1 Main Li...

Page 20: ...does not fully open or close it is time to maintain the MOC in the cell Maintenance usually means cleaning and lubricating the MOC mechanism If the MOC has seen a large number of cycles however worn c...

Page 21: ...of the handle When charging is complete the closing crank goes over center with an audible click and the springs Charged Discharged Indicator shows Charged Remove the maintenance tool m NOTICE IF THE...

Page 22: ...s indicator reads OPEN d Push the circuit breaker into the cell until the mechanical stop is reached this will be indicated by an audible click At this point the side plunger has fallen into the front...

Page 23: ...uit breaker can be operated either electrically or mechanically Remove rotary racking handle before performing any testing b To further remove the circuit breaker to the disconnect position continue t...

Page 24: ...lace Insulation Integrity Main circuit to ground Withstand 15kV 60Hz for 1 Minute 5kV Rating 27kV 60Hz for 1 Minute 8 25kV and 15kV Ratings Hi pot Tester Clean and retest or replace Control circuit to...

Page 25: ...t is recommended that the equipment be capable of delivering 25 milliamperes for one minute The current delivery capability of 25 mA ac applies when all three vacuum interrupters are tested in paralle...

Page 26: ...from Ohm s Law and is expressed in micro ohms Repeat for the remaining two poles The resistance should not exceed the factory test levels more than 200 as stated in IEEE C37 09 Factory test levels ar...

Page 27: ...e Tool Mounting Testing Locations by Circuit Breaker Type CIRCUIT BREAKER DESIGNATION APPROXIMATE MECHANISM CHASSIS WIDTH INCH LOWER MOUNTING HOLE LOWER MOUNTING HOLE MARKER PLACEMENT HOLE AM4 16 VR 1...

Page 28: ...on a sheet of paper that can be kept as a record of the test Record the date of the test person conducting the test circuit breaker serial number and the operations counter on the tape or paper Figur...

Page 29: ...Marker CloSure Tool TM 15O 15O Figure 6 13 Determining the Distance Traveled Figure 6 14 Illustrative Testing Tape Sample Figure 6 12 Evaluate the CloSure Performance Date of Breaker Operations CloSu...

Page 30: ...lement requires maintenance only once every ten years or ten thousand operations which ever comes first After a ten year service interval or when ten thousand operations have been reached contact your...

Page 31: ...or burned Motor Cut Off Contacts open or burned Trip Coil Assembly Clapper fails to reset Closing sound but no close Pole Shaft Not open fully Trip Latch Reset Spring Damaged or missing Trip Bar D Sha...

Page 32: ...SWITCH Breaker Auxiliary Switch 94C9525G13 5 BREAKER POSITION SWITCH Breaker Position Switch PS1 94C9525H06 6 BREAKER POSITION SWITCH Breaker Position Switch PS2 94C9525H07 7 LATCH CHECK SWITCH Latch...

Page 33: ...33 Instruction Book IB182923EN September 2018 www eaton com AMH 4 76 VR VR Series Replacement Circuit Breaker...

Page 34: ...vard Cleveland OH 44122 United States Eaton com 2018 Eaton All Rights Reserved Printed in USA Publication No IB182923EN September 2018 Eaton is a registered trademark All trademarks are property of th...

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