Delta VFD-ED Series User Manual

Appendix A. EMC Standard Installation GuideVFD-ED
A-12
TN-C system
TN-C: PE and N are two separate conductors in an electrical installation similar to a three-phase five-
wire system, but near the power side, PE and N are combined into a PEN conductor similar to a three-
phase four-wire system.
L1
L2
L3
PEN
ConsumerEart h
Generat or or
t r ansf or mer
TN-C-S system
TN-C-S: A combined earth and neutral system (PEN conductor) is used in certain systems but
eventually split up into two separate conductors PE and N. A typical application of combined PEN
conductor is from the substation to the building but within the building PEN is separated into the PE
and N conductors. Direct connection of PE and N conductors to many earthing points at different
locations in the field will reduce the risk of broken neutrals. Therefore, this application is also known as
protective multiple earthing (PME) in the UK or as multiple earthed neutral (MEN) in Australia
L1
L2
L3
N
ConsumerEarth
Generat or or
t r ansf or mer
PE
Figure A-11
Figure A-12

Delta VFD-ED Series Specifications

General

Brand	Delta
Model	VFD-ED Series
Category	DC Drives
Language	English