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Compact® NSF and NSJ 150 to 600 A Circuit Breakers
Section 13—Supplementary Technical Information
© 1995–2003 SchneiderElectric All Rights Reserved
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Test Sequences
Sequence Category of Devices Tests
1–General Characteristics All Circuit Breakers
•Trip Unit Control
•Dielectric Properties
•Mechanical and Electrical Endurance
•Overload
•Dielectric Voltage Withstand
•Temperature Rise
•145% Calibration (3 Phases Test)
2–Breaking Capacity During Operation All Circuit Breakers
•Breaking Capacity During Operation (Ot-CO-t-CO)
•Dielectric Voltage Withstand
•Temperature Rise
•145% Calibration (3 Phases Test)
3–Ultimate Breaking Capacity (Icu) A
B if Icu > Icw
•200% Calibration (Each Pole Separately)
•Ultimate Breaking Capacity (O-t-CO)
•Dielectric Voltage Withstand
•250% Calibration (Each Pole Separately)
4–Admissible Short Duration Current (Icw) B
•200% Calibration (Each Pole Separately)
•Short-time Current Withstand
•Temperature Rise
•Breaking Capacity at Admissible Short-time Current (O-t-CO)
•Dielectric Voltage Withstand
•200% Calibration (Each Pole Separately)
Combined Sequence
•Icw = Ics Replaces Sequences 2
and 4
•Icw = Ics = Icu Replaces
Sequences 2, 3 and 4
•200% Calibration (Each Pole Separately)
•Short-time Current Withstand Icw
•Breaking Capacity at Ics (O-CO-CO) at Maximum Relay Temp.
•Dielectric Voltage Withstand
•Temperature Rise
•200% Calibration (Each Pole Separately)