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Alstom MBCH13 User Manual

Alstom MBCH13
52 pages
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Service Manual
Type MBCH
Biased Differential Relay
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Alstom MBCH13 Specifications

General IconGeneral
BrandAlstom
ModelMBCH13
CategoryRelays
LanguageEnglish

Summary

SAFETY SECTION

Health and safety

General safety and handling information for equipment and personnel.

Explanation of symbols and labels

Defines symbols and labels used in product documentation and on equipment.

Installing, Commissioning and Servicing

Guidelines for safe installation, commissioning, and servicing procedures.

Current transformer circuits

Safety precautions for working with live current transformer secondary circuits.

Insulation and dielectric strength testing

Procedures and precautions for insulation testing, including capacitor discharge.

Technical Specifications

Section 2. INSTALLATION

Section 3. COMMISSIONING

3.1 Commissioning preliminaries

Initial checks and precautions before commencing commissioning tests.

3.2 Commissioning tests

Detailed procedures for verifying relay functionality and performance.

Section 5 SETTINGS

Section 6 COMMISSIONING TEST RECORD

3.2.2 Measure dc auxiliary voltage Vx

Procedure to measure the DC auxiliary supply voltage for the relay.

3.2.3 Relay settings Is

Recording and verifying relay settings for various current thresholds.

3.2.4 Operating Time

Measuring and recording relay operating times at different current levels.

3.2.5 Bias check (setting 0.2 x In)

Performing and recording bias checks at specified settings.

3.2.8 On load tests

Conducting tests under actual load conditions to verify system connection.

3.2.9 Magnetizing current inrush test

Testing the relay's response to simulated or actual magnetizing inrush currents.

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