3 | Product description
KEB Automation KG
12
ma_dr_e6-hf-filter-nb-20337731_en
B
C1
10. digit
Mains form
0
TN, TT
5
IT, TN, TT
11. digit
Version
0
Sequential numbering
3.4 Functional description
3.4.1 IT mains filter
3.4.1.1 Schematic diagram HF mains filter for IT, TN and TT systems
L1
L2
L3
PE
L1'
L2'
L3'
PE
①
②
③
③
④
Fig. 1:
Schematic diagram HF mains filter for IT, TN and TT systems
①
Mains input (L1, L2, L3)
②
Mains output (L1‘, L2‘, L3‘)
③
Protective earth (PE)
③
Protective earth (PE)
④
Insulation resistance to earth typ. 16 MΩ
3.4.1.2 Use at the IT system
The rated voltage between a phase conductor and the earth potential (or the star point in
the IT system) must not exceed 300 V, USA UL: 480 / 277 V.
A short-term disconnection must be ensured when using an IT system.
