Mitsubishi NF-S Series User Manual

14
5. CIRCUIT BREAKER SELECTION
5.1 Circuit Breaker Selection Table
Following Table shows various characteristics of each breaker to consider selection and coordination with
upstream devices or loads.
Characteristics
Standard : Standard characteristics MCCBs
Low-inst : Low-inst. MCCBs for Discrimination
When a power fuse (PF) is used as a high-voltage protector, it must be coordinated
with an MCCBs on the secondary side.
Generator: Generator-Protection MCCBs
These MCCBs have long-time-delay operation shorter than standard type and low
instantaneous operation.
Mag-Only : Magnetic trip only MCCBs
These are standard MCCBs minus the thermal tripping device. They have no time-
delay tripping characteristic, providing protection only against large-magnitude short-
circuit faults.
PF short-time tolerancs
capacity
Pf.
Tr.
MCCB1
MCCB2
Time
MCCB
operating
characteristic
curve
Low-inst.MCCBs
Current

Mitsubishi NF-S Series Specifications

General

Brand	Mitsubishi
Model	NF-S Series
Category	Circuit breakers
Language	English