NHP TemBreak PRO - Protection Settings; Trip Curve; List of Protection Functions

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TemBreak PRO B_BE-UM-001-EN  V1.1.0
Protection Settings
Trip Curve
The TemBreak PRO B_BE electronic trip unit protects against overcurrent and short circuit faults for many types of electrical distribution systems.
The P_BE OCR has protective characteristics according to the requirements of the standard AS/NZS IEC 60947-2.
All protection functions are based on the effective value (RMS) of power, to reduce the effects of current harmonics.
The wide range of protection curves adjustments assist in being able to achieve Selectivity combinations of upstream and downstream protection.
LSI 3 Pole
LSIG 3 Pole
LSI 4 Pole
LSIG 4 Pole
List of Protection Functions
Abbreviation
Description
Protection against
Symbol
Definition
Adjustable
L
Long-time delay (LTD) protection
Low level current
overload
I
r
Threshold long time
protection
I
R
dial adjustment /
fixed pre-defined curve
selection
t
r
Long Time Delay
S
Short-time delay (STD protection
Low level short-circuit
I
sd
Threshold short time
protection
Pre-defined curve
selection
t
sd
Short Time Delay
I
Instantaneous (INST) protection
Larger short-circuit
I
i
Instantaneous protection
threshold
Pre-defined curve
selection
G
Ground/Earth protection
Ground / Earth fault
I
g
Earth Protection Threshold
Dip switch
t
g
Delay protection Earth
Time-current curve