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MSXE MCCBs from 250A frame to 1600A frame are available with electronic protection units. Current ratings, In, of 40A, 125A, 160A, 250A, 400A, 630A, 800A,
1000A, 1250A and 1600A are available. These offer great f lexibility as their characteristics can be set to suit a wide range of application conditions.
Overload protection can be set between 0.4 and 1.0 times I
n
.
Every electronic protection unit includes overload protection (L), delayed short-circuit protection (S) and instantaneous
protection (I) as standard.
Electronic Protection Characteristic
Ground Fault Trip (GF)
This function trips the MCCB after time delay, t
g
, if the ground fault current exceeds the preset threshold, I
g
.
Ground fault protection can be enabled and disabled by operating a DIP switch on the electronic protection unit. An external current transformer is necessary
if the ground fault trip function is required on a 3 pole MCCB, in a 3 phase, 4 wire system.
The ground fault trip function is available from 400A to 1600A.
Neutral Protection (NP)
Neutral protection (available only for 4P versions) can be adjusted at 100% or 50% from 400A frame to 1600A frame.
Neutral protection (NP)
is present if this box is
filled
Ground fault trip (GF)
is present if this box is
filled
DIP switch to enable
ground fault trip
MSX
21
Technical Information
Version 2.0
For technical information contact the Technical Assistance Service or visit gewiss.com
MCCB WITH ELECTRONIC PROTECTION
MSXE 160 - MSXE 250 - MSXE 400 - MSXE 630 - MSXE 1000 - MSXE 1250 - MSXE 1600