Larsen & Toubro U-POWER Omega UW-MTX 1G User Manual

Copyright © 03/2019 Larsen & Toubro. All Rights Reserved.
Air Circuit Breakers
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USERS’
Manual
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Larsen & Toubro U-POWER Omega UW-MTX 1G Specifications

General

Brand	Larsen & Toubro
Model	U-POWER Omega UW-MTX 1G
Category	Circuit breakers
Language	English

Summary

Section 1: On Receiving

1.1 Visual Inspection

Inspect carton for damage & verify breaker version and rating against order before unpacking.

1.2 Unpacking

Step-by-step instructions for unpacking fixed and draw-out circuit breakers safely from their packaging.

1.3 Handling

Guidelines for safely lifting and transporting fixed and draw-out circuit breakers using various equipment.

1.4 Storage

Instructions for storing circuit breakers in a cool, dry place, away from dust and corrosive environments.

Section 2: Understanding

2.1 Identification

Details on identifying breaker components, labels, and type designations for various UW-MTX models.

2.2 Exploring

Identifies and explains the various parts and components of the breaker and cradle assembly.

2.3 Racking-out

Procedures for safely removing the circuit breaker from its cradle using specific handles and interlocks.

2.4 Operating

Step-by-step guide on how to charge, close, and trip the air circuit breaker manually.

2.5 Technical Data

Comprehensive technical specifications and parameters for UW-MTX ACB series, including ratings and dimensions.

Section 3: Installing

3.1 Mounting & Door cut-out

Guidance on mounting circuit breakers in panels, including dimensions and door cutout details.

3.2 Termination

Instructions and diagrams for different termination methods for fixed and draw-out circuit breakers.

3.3 Loading in Panel

Steps for loading the breaker into the panel, ensuring correct position and connection.

3.4 Control Circuit Connections

Details on wiring control circuits using SICs, including features and specifications for connections.

Section 4: Accessories: Features & Mounting

4.1 Cradle Mounted Accessories

Describes accessories that are mounted on the breaker cradle, such as safety shutters and interlocks.

4.2 Breaker Mounted Accessories

Explains accessories that are mounted directly on the breaker, like auxiliary contacts and releases.

Section 5: Protection & Control units

5.1 Identification

Identifies different UW-MTX protection and control unit models and their displays.

5.3 Detailed Overview

Provides a detailed overview of protection settings and features for various UW-MTX breaker versions.

5.4 Protection Characteristics

Displays trip curves for overload, short circuit, and earth fault protections for UW-MTX ACBs.

Section 6: Putting System Of Breakers in Operation

6.1 Re-loading in panel

Steps for re-loading the breaker into the panel after maintenance or inspection.

6.2 Checking ON-OFF operation

Procedure for verifying the correct closing and tripping operations of the breaker.

6.3 Testing

Guidelines for testing control circuits, interlocks, and accessory functions of the breaker.

6.4 Setting P&C unit

Instructions for configuring protection and control unit settings for UW-MTX breakers.

6.5 Trip Simulation of P&C Unit

Details on using the trip simulation kit to test breaker protection functions.

6.6 ACB’s in Connected Position

Steps to ensure the ACB is correctly racked-in and connected in its operational position.

6.7 Securing your Breaker

Explains security features like padlocking for unauthorized access prevention and safe operation.

Section 7: Maintenance & Operations

7.1 Maintenance schedule & Operations

Regular maintenance schedule, actions, and references for ensuring breaker longevity and performance.

7.2 Accessories and Spares

Catalog of available spare parts and accessories for UW-MTX ACB series, including part numbers.

Section 8: Useful Hints

8.1 Termination - Draw-out Breakers

Practical tips and tables for selecting appropriate bus-bar sizes for draw-out breaker terminations.

8.2 Watt-loss Data of OMEGA ACBs

Provides watt loss data for OMEGA ACBs, important for electrical performance and apparatus selection.