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Siemens 8DA11 User Manual

Siemens 8DA11
48 pages
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Medium-Voltage Switchgear
Type 8DA, Extendable Fixed-Mounted Circuit-Breaker Switchgear up to 40.5 kV
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OPERATING
INSTRUCTIONS
PART 1/2
Description, Operation
and Servicing
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Siemens 8DA11 Specifications

General IconGeneral
Insulating mediumSF6 gas
Installation typeIndoor
Modular designYes
TypeGas-insulated switchgear
Rated currentup to 2500 A

Summary

Safety Instructions

Due Application

Outlines intended use and conditions for safe operation, emphasizing adherence to proper handling, installation, and instructions.

Safety Rules

Lists critical safety rules for electrical work, including isolation, securing against reclosing, verifying isolation, and earthing.

Qualified Personnel

Specifies requirements for personnel involved in assembly, installation, commissioning, and maintenance, focusing on qualifications.

Description of Medium-Voltage Switchgear

Technical Data

Presents comprehensive technical specifications including rated voltages, currents, protection ratings, insulating gas details, and pressure values.

Operation of Medium-Voltage Switchgear

Operating the Circuit-Breaker

Provides instructions for operating the circuit-breaker, covering control board functions, manual operations, and testing procedures.

Operating the Three-Position Switch

Guides users through operating the three-position switch, including manual closing, opening, earthing, de-earthing, and emergency procedures.

Feeder Earthing and De-earthing

Explains procedures for safely earthing and de-earthing feeders, including necessary safety precautions and circuit-breaker operations.

Busbar Make-Proof Earthing Switch

Details operation of the busbar make-proof earthing switch, covering control elements, closing, and opening procedures.

Safe Isolation and Terminal-Phase Connections

Outlines procedures for ensuring safe isolation from supply and verifying correct terminal-phase connections using voltage indication systems.

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