Siemens UL 1066 Operating Instructions Manual page 89

Overcurrent protection settings
Circuit breaker may trip.
If the trip settings are changed while the breaker is closed (and under load) the breaker may trip.
Adjust parameters only when the circuit breaker is in the open position.
All parameters for the basic and the additional functions can be adjusted via:
- the graphical display
 (page 9-93)
- the BDA
- the PROFIBUS-DP
- the MODBUS
To do this, the trip unit must be activated, i.e. it must be connected to an external 24 V DC voltage supply (UL Listed Class 2).
Protective functions
 Overload protection – L-tripping (page 9-12)
 Short-time delayed short-circuit tripping – S-tripping (page 9-12)
 Instantaneous short-circuit tripping – I-tripping (page 9-13)
 Ground-fault tripping – G-tripping (page 9-13)
 Neutral conductor protection – N-tripping (page 9-14)
 Load monitoring (load restore / load shedding) (page 9-14)
 Leading signal for L-tripping (page 9-14)
 Thermal memory can be switched On/Off (page 9-15)
 Ground-fault protection modules (page 9-45)
Characteristics
The ranges shown in the following are only setting ranges of the respective parameters. Possible tolerance ranges are not included here.
Tolerance ranges are shown in the Easy TCC Time Current Curve Software.
The characteristics apply to the circuit breaker version H-class, 480 V, frame size II, with ground-fault protection module.
L-tripping
 (page 9-4)
I-tripping
 (page 9-5)
Ground-fault tripping
 (page 9-5)
 (page 9-29)
NOTICE
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