Mitsubishi NF250-SEP User Manual

ADVANCED AND EVER ADVANCING
MOULDED CASE CIRCUIT BREAKERS
TECHNICAL NOTES
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Mitsubishi NF250-SEP Specifications

General

Brand	Mitsubishi
Model	NF250-SEP
Category	Circuit breakers
Language	English

Summary

4. CHARACTERISTICS AND PERFORMANCE

4.1 Overcurrent-Trip Characteristics (Delay Tripping)

Explains tripping times for overcurrents at 130% and 200% of rated current.

5. CIRCUIT BREAKER SELECTION

5.1 Circuit Breaker Selection Table

6. PROTECTIVE CO-ORDINATION

6.1 General

6.7 Protective Coordination with Motor Starters

6.7.1 Basic Criteria for Coordination

Outlines criteria for coordinating MCCBs with motor starters for overload and short-circuit protection.

7. SELECTION

7.1 Motor Branch Circuits

Discusses MCCB selection for motor branch circuits considering starting current and trip curves.

8. ENVIRONMENTAL CHARACTERISTICS

8.1 Atmospheric Environment

9. SHORT-CIRCUIT CURRENT CALCULATIONS

9.1 Purpose