User Manuals: Eaton MDS-520 Power Circuit Breakers

Manuals and User Guides for Eaton MDS-520 Power Circuit Breakers. We have 1 Eaton MDS-520 Power Circuit Breakers manual available for free PDF download: Instructions For Installation, Operation And Maintenance

Eaton MDS-520 Instructions For Installation, Operation And Maintenance (81 pages)

Magnum DS series; Magnum DSX series; Magnum DSL series Low Voltage Power Circuit Breakers

Brand: Eaton | Category: Power Tool | Size: 16 MB

Table of Contents
4
Section 1: Introduction Page
9
General Information
9
Safety Features
10
Safety Practices
10
Qualified Personnel
11
Other Publications and Documentation
11
Section 2: Receiving, Handling and Installation
12
General Information
12
Suggested Tools
12
Unpacking Circuit Breaker
12
- 2-3.1 Storing Circuit Breaker
  12
Lifting Circuit Breaker
13
Circuit Breaker Inspection
14
Installing Drawout Circuit Breaker
14
Fixed Circuit Breaker
18
Circuit Breaker Operation
18
Section 3: Circuit Breaker Description and Operation
19
Introduction
19
- 3-1.1 MDSL Application/Operation
  23
Basic Circuit Breaker Assembly
23
Pole Units
23
- 3-3.1 Primary Moving Contacts
  24
- 3-3.2 Primary Stationary Contacts
  25
Operating Mechanism
25
- 3-4.1 Manual Operation
  25
- 3-4.2 Electrical Operation
  26
- 3-4.3 Anti-Pump Feature
  26
Arc Chambers
26
- 3-5.1 Arc Chute
  26
Electronic Tripping System
28
- 3-6.1 Microprocessor-Based Trip Unit
  28
- Rating Plug
  29
- 3-6.3 Current Sensors
  29
- 3-6.4 Trip Actuator
  30
- 3-6.5 Mechanical Trip Flag
  30
- 3-6.6 Making Current Release
  30
- 3-6.7 High Instantaneous Trip Option (Magnum DS Only)
  30
- 3-6.8 Voltage Taps
  31
Secondary Contacts and Connection Diagrams
31
- 3-7.1 Connection Diagrams
  32
Accessory Devices
55
MDSL Limiters/Blown Limiter Indication
62
- 3-9.1 MDSL Current Limiters
  62
- 3-9.2 Blown Limiter Sensing
  62
Section 4: Drawout Circuit Breaker and Cassette
64
General
64
- 4-1.1 Drawout Cassette
  64
Drawout Circuit Breaker Dimensions
66
Drawout Cassette Dimensions
66
Section 5: Fixed Circuit Breaker
68
General
68
Fixed Circuit Breaker Dimensions
68
Section 6: Inspection and Maintenance
69
General
69
General Cleaning Recommendations
69
When to Inspect
69
What to Inspect
70
Circuit Breaker Modifications and Changes
73
Section 7: Troubleshooting
77
Introduction
77
Disconnect Position
79

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User Manuals: Eaton MDS-520 Power Circuit Breakers

Eaton MDS-520 Instructions For Installation, Operation And Maintenance (81 pages)

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