ABB Mechanism HMB-8.7 Manuals

Manuals and User Guides for ABB Mechanism HMB-8.7. We have 1 ABB Mechanism HMB-8.7 manual available for free PDF download: Instructions Manual

ABB Mechanism HMB-8.7 Instructions Manual

ABB Mechanism HMB-8.7 Instructions Manual (34 pages)

Brand: ABB | Category: Circuit breakers | Size: 1 MB

Table of Contents

Table of Contents
3
Introduction
6
Description
6
Hydraulic Elements
6
Principles of Operation
7
CLOSE Operation
7
OPEN Operation
7
Over-Pressure Relief Device
7
Mechanism Maintenance
7
Pre-Maintenance Procedures
9
Placing the Mechanism out of Service
9
Manually Operating the Operating Mechanism
9
Slow Switching Operations
9
Deactivating the Close-Position Interlock
9
General Maintenance Practices
9
Mechanism Seals
9
Hydraulic Oil and Service Life
9
Limits on Pump Motor Operation
10
General Maintenance Procedures
10
Checking the Hydraulic Oil Level
10
Valve) and Filter
10
4.3.3.1 Replacing the Pump Element
10
Replacing the Open and Close Pilot Valves
11
Evacuating the Mechanism
11
Refilling the Mechanism with Oil
12
Topping off a Mechanism with Hydraulic Oil
12
4.3.6.2 Refilling a Mechanism that Has Been Drained
12
Replacing the Pump Motor
13
Leak Checking the Hydraulic System
13
Spring Travel Limit Switch Settings
14
Manual Operation
14
Adjusting the Opening Closing Velocities
15
Adjusting the Onboard Auxiliary Switches
15
Manually Charging the Operating Mechanism
16
Troubleshooting
18
Figure 1
21
HMB-8 Hydraulic Operating Mechanism (Cross-Cut Views)
21
Figure 1B
23
HMB-8 Hydraulic Operating Mechanism (External Views)
23
Figure 3
25
Figure 4
26
Mechanical Switch
26
Figure 5
27
Pump with Motor
27
Figure 6
28
Measurement of Spring Tension
28
Figure 7
29
Bottom Side of Working Piston
29
Figure 8
30
Pilot Valve Assembly
30
Figure 9
31
Figure 10
32
Auxiliary Switch Drive Arm
32

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