NF630
NF630 is Yechnical Notes manufactured by Mitsubishi Electric.
ADVANCED AND EVER ADVANCING
MOULDED CASE CIRCUIT BREAKERS
TECHNICAL NOTES
..
98 A
We have the pleasure of providing all our customers with the technical information for Mitsubishi moulded case circuit breakers. This indicates the fundamental data of our circuit breakers regarding the applicable standards, constructional principles, and operational performances. Please refer to the catalogue of our circuit breakers for details of specifications. Also please stand in need of the handling and maintenance manual for maintaning the circuit breakers in service continuously. We do hope they are available for all our customers to built more efficient systems.
..
CONTENTS
1. INTRODUCTION ............................................... 2 2. Features
....................................................... 3
2.1 Arc-Extinguishing Device
- ISTAC .................. 3 2.2 Digital ETR ......................................................... 4 6.8 Coordination with Devices on the High-Voltage Circuit ........................................ 76
7. SELECTION .................................................... 79
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 For Motor Branch Circuits .............................. 79 For Lighting and Heating Branch Circuits .... 79 For Main Circuit ............................................... 80 For Welding Circuits ....................................... 80 For Transformer-Primary Use ........................ 82 For Capacitor Circuits ..................................... 83 For Thyristor Circuits ...................................... 84 MDU Breaker .................................................... 90 Selection of MCCBs in inverter circuit .......... 93
3. CONSTRUCTION AND OPERATION ............... 6 4. CHARACTERISTICS AND PERFORMANCE ............................................. 11
4.1 4.2 4.3 4.4 Overcurrent-Trip Characteristics ................... 11 Short-Circuit Trip Characteristics .....................
