Siemens 3AH - Maintenance; Introduction and Maintenance Intervals; Recommended Hand Tools; Recommended Maintenance and Lubrication

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62.8.5 Push rod & cam assembly

62.8.8 Trip free actuator

63.5 Lever-phase B

64 Opening spring

64.5 Opening spring shaft

Vacuum Interrupter/Operator Description

Figure 7c. Operating Mechanism Section Diagram

Mechanism Closed, Closing Spring Discharged

(Callout items changed from 7b on ‘Circuit Breaker Close’ Opera-

tion)

Figure 7d. Operating Mechanism Section Diagram Op-

erating Mechanism Closed, Closing Spring Charged

(Callout items changed from 7c on ‘Closing Spring Charge’ Opera-

tion)

62.5.2 Close latch pawl

62.8.1 Spring return latch

62.8.2 Trip free draw bar

62.8.3 Trip free lever

62.8.6 Interlock lever-push rod

62.8.7 Interlock lever-actuator

64.2.1 Trip latch pin

64.2.2 Latching pawl release lever

64.3 Lever

64.3.1 Jack shaft pawl

Main Page

Table of Contents3
Table of Illustrations4
Introduction and Safety5
Introduction5
Qualified Person5
Signal Words5
Dangerous Procedures5
Field Service Operation5
Receiving, Handling and Storage6
Introduction6
Receiving Procedure6
Shipping Damage Claims (When Applicable)6
Handling Procedure6
Storage Procedure6
Installation Checks and Initial Functional Tests7
Introduction7
Inspections, Checks and Tests Without Control Power7
Spring Discharge Check (Figure 1)7
Manual Spring Charging Check7
As-Found and Vacuum Check Tests7
Automatic Spring Charging Check7
Final Mechanical Inspections Without Control Power7
Figure 1 Front Panel Controls of Circuit Breaker and Manual Charging of Closing Spring7
Vacuum Interrupter/Operator Description8
Introduction8
Figure 2 Vacuum Circuit Breaker Module8
Vacuum Interrupters9
Primary Disconnects (Figure 4)9
Phase Barriers9
Stored Energy Operating Mechanism9
Vacuum Interrupter/Operator Module9
Figure 3 Cutaway View of Vacuum Interrupter9
Figure 4 Vacuum Interrupter/Operating Mechanism Module9
Construction (Figures 1, 2, 5, 6A,And 6B)10
Circuit Breaker Pole (Figure 5)10
Current-Path Assembly (Figure 5)10
Vacuum Interrupter (Figure 5)10
Switching Operation (Figure 5 and 6A)10
Operating Mechanism10
Figure 5 Pole Assembly10
Figure 6A Stored Energy Operating Mechanism11
Figure 6B Stored Energy Operating Mechanism12
Construction13
Motor Operating Mechanism (Figure 6A)13
Mode of Operation13
Charging13
Closing (Figures 6A, 6B and 7A - 7D)13
Trip Free Operation (Figures 6A and 6B)13
Opening (Figure 6A)13
Figure 7A-B Operating Mechanism Section Diagram14
Figure 7C-D Operating Mechanism Section Diagram15
Figure 8 Operator Sequential Operation Diagram16
Rapid Auto-Reclosing17
Manual Operation17
Manually Charging the Closing Spring (Figures 9A and 9B)17
Manual Closing (Figure 6A)17
Manual Opening (Figure 6A)17
Figure 9A-B Use of Manual Spring Charging Crank17
Figure 10 Typical Elementary Diagram18
Close Coil (52SRC)19
Trip Coil (52T)19
Indirect Releases (Secondary Shunt Release (Dual Trip) (52T1) or Undervoltage (27))19
Secondary Shunt Release (52T1) (Figure 11)19
Undervoltage Release (27) (Figures 10 and 11)19
Construction and Mode of Operation of Secondary Shunt Release and Undervoltage Release (Figures 11, 12 and 13)19
Figure 11 Construction of Secondary Shunt Release19
Capacitor Trip Device20
Shock Absorber20
Auxiliary Switch (52A/B)20
Spring Charging Motor (88)20
Figure 12 Latch Details20
Figure 13 Undervoltage Locked/Unlocked Selection20
Figure 14 Capacitor Trip Device20

Siemens 3AH - Maintenance; Introduction and Maintenance Intervals; Recommended Hand Tools; Recommended Maintenance and Lubrication

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