Eaton Cutler-Hammer 36W-VAC25 Instructions For Installation, Operation And Maintenance
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Eaton Cutler-Hammer 36W-VAC25 Instructions For Installation, Operation And Maintenance

Eaton Cutler-Hammer 36W-VAC25 Instructions For Installation, Operation And Maintenance

Vacuum circuit breakers
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Cutler-Hammer
Instructions for Installation, Operation and Maintenance
of Type W-VAC Vacuum Circuit Breakers
W-VAC Breaker with Carriage
Assembly for SIngle Tier Switchgear
Effective 11/97 Supersedes.B. 3A74499A Dated May, 1993
W-VAC Breaker Element
W-VAC Breaker with Cradle
Assembly for Double Tier Switchgear
I.B. 3A74499B

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Summary of Contents for Eaton Cutler-Hammer 36W-VAC25

  • Page 1 Cutler-Hammer I.B. 3A74499B Instructions for Installation, Operation and Maintenance of Type W-VAC Vacuum Circuit Breakers W-VAC Breaker Element W-VAC Breaker with Carriage W-VAC Breaker with Cradle Assembly for SIngle Tier Switchgear Assembly for Double Tier Switchgear Effective 11/97 Supersedes.B. 3A74499A Dated May, 1993...
  • Page 3 I.B. 3A74499B Page iii WARNING WARNING THE CIRCUIT BREAKER ELEMENTS DESCRIBED IN IMPROPERLY INSTALLING OR MAINTAINING THIS BOOK ARE DESIGNED AND TESTED TO THESE PRODUCTS CAN RESULT IN DEATH, SERI- OPERATE WITHIN THEIR NAMEPLATE RATINGS. OUS PERSONAL INJURY, OR PROPERTY DAMAGE. OPERATION OUTSIDE OF THESE RATINGS MAY CAUSE THE EQUIPMENT TO FAIL, RESULTING IN READ AND UNDERSTAND THESE INSTRUCTIONS...

  • Page 4: Table Of Contents

    I.B. 3A74499B Page iv TABLE OF CONTENTS PAGE SECTION 1 INTRODUCTION Type W-VAC Breaker Ratings..........................1 SECTION 2 SAFE PRACTICES ..........................4 SECTION 3 RECEIVING, HANDLING AND STORAGE Receiving................................5 Handling ................................6 Storage ................................6 SECTION 4 INSTALLATION Initial Inspection and Operation.........................12 Manual Operation Check...........................12 Vacuum Interrupter Integrity..........................12 Insulation ................................12 Contact Erosion and Wipe..........................12...
  • Page 5 I.B. 3A74499B Page v Miscellaneous..............................23 5-5.1 Earthing Contact..............................23 5-5.2 Operations Counter ............................23 Levering Mechanism ............................23 SECTION 6 INSPECTION AND MAINTENANCE Warning ................................25 Frequency .................................25 Inspection and Maintenance Procedures ......................26 Vacuum Interrupter Integrity Test........................27 Contact Erosion and Wipe..........................27 Insulation ................................28 Insulation Integrity Check ..........................28 Primary Circuit Resistance Check........................29 Mechanism Check.............................29...
  • Page 6 I.B. 3A74499B Page vi FIGURES Figure Title Page Type W-VAC Breaker Element Only Outline Dimensions (millimeters) and Weights (Kilograms) ....2 Outline and Dimensions (mm) Type W-VAC Breaker Element with Carriage Assembly and Cradle Assembly........................3 Typical VCP-W Tools and Accessories .....................5 Typical Front View VCP-W Vacuum Circuit Breaker Element ..............7 Typical VCP-W Vacuum Circuit Breaker Element with Front Cover Removed .........8 Typical Rear View VCP-W Vacuum Circuit Breaker Element..............9...

  • Page 7: Section 1 Introduction

    I.B. 3A74499B Page 1 SECTION 1: INTRODUCTION WARNING The purpose of this book is to provide instructions for unpacking, storage, installation, operation and mainte- SATISFACTORY PERFORMANCE OF THESE nance of Type W-VAC Vacuum Circuit Breakers. Type BREAKERS IS CONTINGENT UP-ON PROPER W-VAC is a horizontal drawout type removable inter- APPLICATION, CORRECT INSTALLATION AND rupting element design.

  • Page 8: Type W-Vac Breaker Element Only Outline Dimensions (Millimeters) And Weights (Kilograms)

    I.B. 3A74499B Page 2 ? 3 = ? O @ K ? O @ K ? ? O @ K O @ ? @ K ? @ 6 ? @ K C 5 ? ? S @ @ @ @ @ @ @ @ @ @ ? @ @ @ @ @ @ @ @ @ @ ? h f ? @ @ @ @ ? @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ ? @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ ? @ @ @ @ @ @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? 3 @ @ @ @ @ U ? ? @ h e ? ? 7 <...

  • Page 9: Outline And Dimensions (Mm) Type W-Vac Breaker Element With Carriage Assembly And Cradle Assembly

    I.B. 3A74499B Page 3 33.3 ? W 2 @ @ 6 K ? ? O 2 @ @ ? ? O 2 @ 6 K O - X ? ? O ) X ? @ K ? ? @ ? @ ? @ ? * @ @ @ @ @ @ @ @ ? @ h W 2 @ @ @ @ @ @ @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? h @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? @ @ @ @ @ @ 0 R 1 ? @ ? ' @ @ @ @ 1 ? / T .

  • Page 10: Section 2 Safe Practices

    I.B. 3A74499B Page 4 SECTION 2: SAFE PRACTICES • Do not work on a breaker with the secondary test cou- pler engaged. Failure to disconnect the test coupler could result in an electrical shock leading to death, per- Type W-VAC breakers are equipped with high speed, sonal injury or property damage.

  • Page 11: Section 3 Receiving, Handling And Storage

    I.B. 3A74499B Page 5 SECTION 3: RECEIVING, HANDLING AND When opening the container, be careful that any loose STORAGE items or hardware are not discarded with the packing material. Check the contents of each package against Type W-VAC circuit breakers are subjected to complete the packing list.
  • Page 12 I.B. 3A74499B Page 6 3-3 STORAGE 3-2 HANDING If the circuit breaker is to be placed in storage, maxi- mum protection can be obtained by keeping it in the WARNING original container. DO NOT USE ANY LIFTING DEVICE AS A PLAT- Before placing it in storage, checks should be made to FORM FOR PERFORMING MAINTENANCE, REPAIR make sure that the breaker is free from shipping dam-...
  • Page 13 I.B. 3A74499B Page 7 Front Panel Operation Counter Manual Charge Socket Rating Nameplate Open-Closed Indicator Manual Open Button Spring Charged/Discharged Indicator Manual Close Button Figure 3-2 Type W-VAC breaker element faceplate Effective 11/97...
  • Page 14 I.B. 3A74499B Page 8 L.H. Closing Spring Charging Motor Anti-pump Relay Charging Pawl Auxiliary Switch Ratchet Wheel Motor Cutoff Switch R.H. Closing Spring Closing Cam Opening Spring Spring Release (Close Coil) Assembly Manual Charge Socket Shunt Trip Assembly Secondary Disconnect Position Switch Operation Counter Figure 3-3 Front external view of W-VAC breaker element...
  • Page 15 I.B. 3A74499B Page 9 Secondary Disconnect Contact Loading Spring “Wipe Spring” Lifter Yoke Opening Operating Rod Support Insulator Drive Insulator Primary Disconnect Flexible Connector Vacuum Interrupter Figure 3-4 Rear external view of W-VAC breaker element Effective 11/97...
  • Page 16 I.B. 3A74499B Page 10 Side View Rear View Mechanism Enclosure Carriage Wheel Support Insulator Shoot Bolt Lever Primary Disconnect Shutter Operator Levering in Screw Levering Device Socket Carriage Figure 3-5 Side and rear external view W-VAC breaker with carriage assembly for single tier switchgear Effective 11/97...

  • Page 17: Front And Rear External View W-Vac Breaker With Cradle Assembly For

    I.B. 3A74499B Page 11 Front View Rear View Mechanism Enclosure Cradle Wheel Support Insulator Shutter Operator Primary Disconnect Levering Device Socket Levering in Screw Shoot Bolt Lever Cradle Earthing Contact Figure 3-6 Front and rear external view W-VAC breaker with cradle assembly for double tier switchgear Effective 11/97...

  • Page 18: Section 4 Installation

    I.B. 3A74499B Page 12 SECTION 4: INSTALLATION breaker. Check contact erosion and wipe as described in Section 6.5. 4-6 PRIMARY CIRCUIT RESISTANCE WARNING Check the primary circuit resistance as described in BEFORE PLACING THE BREAKER IN SERVICE, Section 6.8 The resistance should not exceed the val- CAREFULLY FOLLOW THE INSTALLATION PROCE- ues specified.

  • Page 19: Type W-Vac Breaker Manual Operation (Single Tier Breaker Shown)

    I.B. 3A74499B Page 13 a. Inserting the maintenance tool into b. Lifting shoot lever permits insertion the manual charging socket of levering crank c. Manually closing the breaker d. Manually tripping the breaker Figure 4-1 Type W-VAC breaker manual operation (single tier breaker shown) Effective 11/97...

  • Page 20: Breaker/Compartment Interface Check

    I.B. 3A74499B Page 14 ondary contacts when in the disconnected position. The d) Anti-Latch Interlock: This interlock prevents the structure mounted secondary contact blocks are perma- breaker from being closed between the Connected and nently mounted and cannot be moved out for direct con- Test positions.
  • Page 21 I.B. 3A74499B Page 15 Step 6: Withdraw Breaker from Test Position: 1. For the single tier configuration carriage assembly version, lift the shoot bolt lever and pull the breaker out. The breaker will close and trip as it comes out from the Test position.

  • Page 22: Section 5 Description And Operation

    I.B. 3A74499B Page 16 SECTION 5: DESCRIPTION AND OPERATION Cutler-Hammer Type W-VAC breakers are horizontal drawout vacuum circuit breakers. They are designed specifically to IEC 56 and KEMA certified to IEC Standards, including their earthing system. Type W-VAC breakers are available in three mounting configurations.

  • Page 23: 5-1.2 Contact Erosion Indicator

    I.B. 3A74499B Page 17 Arc interruption is simple and fast. In the closed posi- tion, current flows through the interrupter. When the contacts are opened, the arc is drawn between the con- tact surfaces. It is rapidly moved around the slotted con- tact surfaces by a self-induced magnetic force which prevents gross contact erosion as well as the formation of hot spots on the contact surfaces.

  • Page 24: 5-1.5 Pole Unit Support Molding

    I.B. 3A74499B Page 18 The circuit breaker mechanism provides a fixed amount of motion to the operating rods. The first portion of the motion is used to close the contacts (i.e. stroke) and the remainder is used to further compress the preloaded wipe spring.

  • Page 25: 5-2.2 Charging

    I.B. 3A74499B Page 19 5-2.2 CHARGING Figure 5-5d shows the breaker in the closed position after the closing springs have been recharged. Note that Figure 5-6 is a schematic view of the spring charging the spring charging rotates the closing cam by one half parts of the stored energy mechanism.

  • Page 26: Closing Cam And Trip Linkage

    I.B. 3A74499B Page 20 ? @ ? @ ? @ ? @ ? @ @ ? ? @ ? @ ? @ ? @ g W . e ? / X ? @ ? @ ? / X ? @ @ ? @ ? .

  • Page 27: Charging Schematic

    I.B. 3A74499B Page 21 ? / X ? ? / X ? ? @ ? @ ? V / X ? / K ? @ ? / X ? V / ? @ ? ? @ K ? g / X f @ ? @ ? ? 3 L ? e V / X V 4 6 X ? @ ? @ ? @ ? @ ? @ ? @ ? @ ? ? @ ? / X ? @ ? @ ? @ ? @ ? e @ ? f ? @ f ? @ g @ ? @ @ ? J @ L V / f @ ? / X ? W .

  • Page 28: 5-3.1 Timing

    I.B. 3A74499B Page 22 When the CS/C contact is made, the SR closes the mounted and cannot be moved out for direct connection breaker. If the CS/C contact is maintained after the with the breaker mounted secondary contacts. breaker closes, the Y relay is picked up. The Y/a contact seals in Y until CS/C is opened.

  • Page 29: Interlocks

    I.B. 3A74499B Page 23 Device coil has at least 85% of the rated voltage release clapper does not lift the lever, thus the spring applied, the moving clapper is held to the yoke by the release latch cannot be moved. magnetic force,even though the reset lever has moved 5-4.4 EARTHING DRIVE INTERLOCK 5-4 INTERLOCKS...
  • Page 30 I.B. 3A74499B Page 24 W-VAC BREAKER DC CONTROL SCHEMATIC 8794C60H01 ? O & @ @ @ @ @ @ 1 O @ K ? W 2 @ @ @ @ 6 X ? O 2 @ @ @ 6 X ? W 2 @ @ @ @ @ @ ) X ? ? W 2 @ @ @ @ 6 X ? W &...

  • Page 31: Undervoltage Trip Device Configuration

    I.B. 3A74499B Page 25 ? @ K ? W 2 @ @ ? @ @ @ @ @ @ @ @ @ @ @ @ ? 7 < ? W . Y W 2 @ ? @ @ ? @ @ ? @ ? W .

  • Page 32: Section 6 Inspection And Maintenance

    I.B. 3A74499B Page 26 SECTION 6: INSPECTION AND •DO NOT STAND LESS THAN ONE METER AWAY FROM THE BREAKER WHEN TESTING FOR VACU- MAINTENANCE UM INTEGRITY. FAILURE TO FOLLOW ANY OF THESE INSTRUC- TIONS MAY CAUSE DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. SEE SECTION 2- WARNING SAFE PRACTICES FOR MORE INFORMATION.

  • Page 33: Inspection And Maintenance Procedures

    I.B. 3A74499B Page 27 6-3 INSPECTION AND MAINTENANCE PROCEEDURES No./Section Inspection Item Criteria Inspection Method Corrective Action 1. Insulation Drive Insulator No dirt Visual Check Clean with lint-free cloth Molded Pole Unit Support No cracking Visual Check Replace cracked unit Insulation Main Circuit to Ground Withstand...

  • Page 34: Vacuum Interrupter Integrity Test

    I.B. 3A74499B Page 28 6-4 VACUUM INTERRUPTER INTEGRITY TEST In this case the equipment must be capable of delivering 5 milliamperes for one minute to avoid ambiguity due to Vacuum interrupters used in Type W-VAC circuit break- field emission or leakage currents and the test voltage ers are highly reliable interrupting elements.

  • Page 35: Insulation

    I.B. 3A74499B Page 29 Figure 6-2 Vacuum interrupter showing contact erosion Figure 6-3 Vacuum interrupter showing contact erosion indicator with breaker open (shown here for clarity pur- indicator with breaker closed (indicators are checked poses only). only when breaker is closed). 6-7 INSULATION INTEGRITY CHECK WARNING Primary Circuit:...

  • Page 36: Primary Circuit Resistance Check

    I.B. 3A74499B Page 30 Close the Breaker Blue Contact Spring W . ? @ f @ ? g @ ? h @ ? @ 6 X ? h ? ? I / K h ? V ' @ ? g ? W 2 @ 6 K ? ? V ' L g ? .
  • Page 37 I.B. 3A74499B Page 31 If it becomes necessary to disassemble the mechanism, Table 6.2 Typical Resistance Measurements the bearings and related parts should be thoroughly cleaned. Remove old grease in a good grease solvent. Rated Resistance Don not use carbon tetracholride. They should then be Continuous (microohms) washed in light machine oil until the cleaner is removed.

  • Page 38: Troubleshooting Chart

    I.B. 3A74499B Page 32 6-11 TROUBLESHOOTING CHART SYMPTOM INSPECTION AREA CONTROL DEFECTS Fails To Close • Closing Springs not charged • Control Circuit • Control Power (fuse blown or switch off) • Secondary Disconnects • Motor Cut-off Switch (Poor or burned contacts, Lever not operational) •...
  • Page 39 I.B. 3A74499B Page 33 SYMPTOM INSPECTION AREA CONTROL DEFECTS Fails To Close • Closing Springs charged but • No Closing Sound • Control Power breaker does not close (Close Coil does not pick up) (Fuse Blown or switch off) • Secondary Disconnects •...
  • Page 40 I.B. 3A74499B Page 34 SYMPTOM INSPECTION AREA CONTROL DEFECTS Fails to Trip • No Trip Sound • Control Circuit • Control Power (Fuse blown or switch off) • Secondary Disconnect • Auxiliary Switch (a contact no making, poor or burned) •...

  • Page 41: Section 7 Renewal Parts

    I.B. 3A74499B Page 35 SECTION 7: RENEWAL PARTS 7-2 ORDERING INSTRUCTIONS a.) Always specify the breaker rating information and 7-1 GENERAL shop order number. In order to minimize production downtime, it is recom- b.) Describe the item, give the style number, and specify mended that an adequate quantity of spare parts be car- the quantity required.
  • Page 42 I.B. 3A74499B Page 36 Table 7.1 Recommended W-VAC Spare Parts Line No. Description Style @ K h ? @ @ @ @ @ @ @ @ @ 6 X ? @ ? @ h g ? @ 6 K O @ h e @ @ e ? @ @ X S ) X @ ? @ h g ? @ @ @ @ @ ? @ @ @ e @ ? @ @ @ @ ? ' @ ( R 4 0 R 4 @ ? V + Y h ? ) X ? h e @ ? h e ? @ ? @ , ? h e...
  • Page 43 I.B. 3A74499B Page 37 Line No. Description Style Spring Release Coils 48 VDC 3759A76G01 110/125 VDC-110/120 VAC-50/60 Hz 3759A76G02 220/250 VDC-220/240 VAC-50/60 Hz 3759A76G03 Rectifier 110-120/220-240 VAC 3759A79G01 Anti-Pump Relay 48 VDC 3759A74G03 110/125 VDC 3759A74G04 220/250 VDC 3759A74G05 110/120 VAC 50/60 Hz 3759A74G01 220/240 VAC 50/60 Hz 3759A74G02...
  • Page 44 Line No. Description Style Auxiliary Switch (Push On) 698B822H01 Auxiliary Switch (Screw Type) 8293A01H01 Trip D-Shift Standard 691C662G01 691C666G01 Trip Latch (Hatchet) 699B040G01 Cluster Assembly 630A 699B104G01 800/1250A 508B022G01 1600/2000A 5677B328G01 W & ? @ @ @ @ @ @ @ @ @ @ ? f ? @ h f ? @ e @ ? & @ h ? ' 6 K W - X ? f ? @ e ? @ e ? @ H ? @ ? h e ? V ' @ @ @...
  • Page 45 I.B. 3A74499B Page 39 Effective 11/97...
  • Page 46 I.B. 3A74499B Page 40 Effective 11/97...
  • Page 47 I.B. 3A74499B Page 41 Effective 11/97...
  • Page 48 I.B. 3A74499B This instruction booklet is published solely for informa- tion purposes and should not be considered all inclu- sive. If further information is required, you should con- sult Cutler-Hammer. Sale of product shown in this literature is subject to terms and conditions outlined in appropriate Cutler- Hammer selling policies or other contractual agreement between the parties.

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