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The left adjustment dial sets the rated current to match the conductor rating. The right adjustment dial selects one of seven preset characteristics on 400A,
800A, 1250A and 1600A models, and one of six preset characteristics on 630A and 1000A models, and one of 5 preset characteristics on 250A model.
The effects of the left adjustment dial (labelled I
R
(A)), and the right adjustment dial (labelled Characteristics) are detailed in the tables shown underneath each
time / current graph.
ADJUSTMENT DIALS
Tolerances of Characteristics
Characteristics
Tolerance
Long Time Delay (L)
I
R
Tripping when (I
R
1.05) < load current
(I
R
1.25)
t
R
± 20%
Short Time Delay (S)
I
sd
± 15%
t
sd
Total clearing time +50ms, resettable time –20ms
Instantaneous (I)
I
i
± 20%
Ground Fault Trip (GF)
I
g
± 15%
t
g
Total clearing time +50ms, resettable time –20ms
Neutral Protection (NP)
I
N
Tripping when (I
N
1.05) < load current
(I
N
1.3)
MSX
22
MCCB WITH ELECTRONIC PROTECTION
MSXE 160 - MSXE 250 - MSXE 400 - MSXE 630 - MSXE 1000 - MSXE 1250 - MSXE 1600
Technical Information
Version 2.0
For technical information contact the Technical Assistance Service or visit gewiss.com