iii
Instruction Book IB182923EN September 2018 www.eaton.com
AMH-4.76-VR
+
VR-Series
+
Replacement Circuit Breaker
Table of Contents
DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY ii
SECTION 1: INTRODUCTION 4
1.1 VISUAL INSTRUCTION BOOKLET ESSENTIALS 4
1.2 QUICK RESPONSE CODE 4
1.3 AVAILABLE AMH-4.76-VR
+
CIRCUIT BREAKERS 4
SECTION 2: SAFE PRACTICES 7
SECTION 3: RECEIVING, HANDLING, AND STORAGE 8
3.1 RECEIVING 8
3.2 HANDLING 8
3.3 STORAGE 9
3.4 AMH-4.76-VR
+
APPROXIMATE WEIGHTS 9
SECTION 4: DESCRIPTION AND OPERATION 12
4.1 VACUUM INTERRUPTER 12
4.1.1 VACUUM INTERRUPTER ASSEMBLY 12
4.1.2 CONTACT EROSION INDICATOR 12
4.1.3 CONTACT WIPE AND STROKE 13
4.2 PHASE BARRIERS 13
4.3 BUSHI N G S A ND DISC O NN ECT ING CO NTACT AS S E M B L I E S
13
4.4 STORED ENERGY MECHANISM 13
4.4.1 CLOSING SPRING CHARGING 13
4.4.2 CLOSING OPERATION 13
4.4.3 TRIPPING OPERATION 14
4.4.4 TRIP-FREE OPERATION 14
4.5 CONTROL SCHEMES 14
4.5.1 TIMING 14
4.6 SECONDARY CONNECTION BLOCK 14
4.7 INTERLOCKS 14
4.7.1 ANTI-CLOSE INTERLOCK 14
4.7.2 RACK ING SYSTEM TRIP A ND 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 COUNTER 15
4.8.2 MOC OPERATOR 15
SECTION 5: INSPECTION & INSTALLATION 20
5.1 EXAMINATION FOR DAMAGE 20
5.1.1 NAMEPLATE VERIFICATION 20
5.2 SURE CLOSE MECHANISM ADJUSTMENT 20
5.3 MANUAL OPERATION CHECK 21
5.4 VACUUM INTERRUPTER INTEGRITY 21
5.5 LOW FREQ UEN CY WI THSTAND TES T (I NSULATION CHEC K)
21
5.6 CONTACT EROSION AND WIPE 21
5.7 PRIMARY CIRCUIT RESISTANCE 21
5.8 ELECTRICAL OPERATIONS CHECK 21
5.9 DESCRIPTION OF OPERATIONAL POSITIONS 22
5.10 INSERTION PROCEDURE 22
5.11 REMOVAL PROCEDURE 23
SECTION 6: INSPECTION & MAINTENANCE 24
6.1 INSPECTION FREQUENCY 24
6.2 INSPECTION AND MAINTENANCE PROCEDURES 24
6.3 VACUUM INTERRUPTER INTEGRITY TEST 25
6.4 CONTACT EROSION AND WIPE 25
6.5 INSULATION 26
6.6 INSULATION INTEGRITY CHECK 26
6.7 PRIMARY CIRCUIT RESISTANCE CHECK 26
6.8 VR-SERIES
+
CIRCUIT BREAKER ELEMENT MECHANISM
CHECK 26
6.8.1 CLOSURE™ TEST 26
6.9 MAINTENANCE RECOMMENDATION 30
SECTION 7: REPLACEMENT PARTS 32
7.1 GENERAL 32
7.2 ORDERING INSTRUCTIONS 32
To Next Page
Loading...
Need help?
General
