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Siemens 3AH4 User Manual

Siemens 3AH4
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© Siemens AG 1996. All rights reserved.
3AH4
Vacuum circuit-breaker
3AH41, 3AH42 and 3AH43
OPERATING INSTRUCTIONS
Order no.: 9229 9862 176 0D
Ordering location: IC LMV LP PO P C41
AG 08.2013 en
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Siemens 3AH4 Specifications

General IconGeneral
BrandSiemens
Model3AH4
CategoryCircuit breakers
LanguageEnglish

Summary

For Your Safety

Signal Terms and Definitions

Defines safety signal terms like DANGER, WARNING, CAUTION, and NOTE.

Transport, Storage, and Packing

Storage Guidelines

Conditions and guidelines for storing the vacuum circuit-breaker safely.

General Information

Range of Application

Specifies the voltage range and intended uses for the 3AH4 vacuum circuit-breakers.

Standards and Approvals

Lists compliance with IEC standards and X-Ray Ordinance approval.

Description

Vacuum Circuit-Breaker Design

Overview of the main components of the 3AH4 vacuum circuit-breaker.

Pole Assembly

Detailed description of the pole assembly, including its sub-components.

Mechanism Box and Indicators

Description of the mechanism box, its components, functions, and indicators.

Rating Plate and Technical Data

Technical Data Table

Table of key technical specifications for the 3AH4 vacuum circuit-breakers.

Mounting

Safety Precautions for Mounting

Critical safety warnings and procedures before and during mounting.

Earthing and Low-Voltage Connections

Procedures for connecting the circuit-breaker to earth and low-voltage systems.

Operation

Commissioning Checklist

Checklist for ensuring proper functioning before commissioning the circuit-breaker.

Test Switching Procedures

Procedures for testing operations without and with supply voltage applied.

Closing and Opening Operations

Detailed steps for closing, opening, and discharging the closing spring.

Maintenance

Maintenance and Servicing Safety

Essential safety rules and precautions before performing maintenance work.

Maintenance Plan and Schedule

Schedule and tasks for regular maintenance based on operating cycles and time.

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