Siemens SENTRON 3WA1 Manual page 49

Changing the current rating
For the 3 sizes of the 3WA circuit breaker, the rated current I
values given in the table below by means of the option plug. The selected value should
correspond to the rated current of the power distribution system and must not exceed
the maximum rated current of the circuit breaker I
label).
Rated current
250 A
315 A
400 A
500 A
630 A
800 A
1000 A
1250 A
1600 A
2000 A
2500 A
3200 A
4000 A
5000 A
6300 A
Changing the basic protective functions
Option plugs with the following basic protective functions are available for the ETU300
and ETU600 electronic trip units:
Overload protection LT
Short-time-delayed short-circuit protection ST
Instantaneous short-circuit protection INST
Ground-fault protection GF
By exchanging the option plug and using an LSI option plug, the ground-fault protection
GF on the ETU300 LSIG and ETU600 LSIG electronic trip units can be completely
deactivated.
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
(see circuit breaker accessory
n max
Size 1 Size 2
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
--
--
--
--
Option plug with
protective function LSI
✓
✓
✓
--
Description
2.3 Protection system
can be changed to the
n
Size 3
✓ --
✓ --
✓ --
✓ --
✓ --
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
-- ✓
-- ✓
Option plug with
protective function
LSIG GFx
✓
✓
✓
✓
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