UMG 509-PRO
24
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Grid systems and maximum rated voltages according to DIN EN 61010-1/A1:
6. Grid systems
Three-phase 4-conductor
systems
with grounded neutral con-
ductor
Three-phase 4-conductor
systems
with non-grounded
neutral conductor (IT networks)
Three-phase 3-conductor
systems
ungrounded
Three-phase 3-conductor
systems
with grounded phase
L1
L2
L3
E
E
N
E
L1
L2
L3
E
N
R
L1
L2
L3
E
E
L1
L2
E
E
L
N
E
E
L1
L2
L3
E
E
L1
L2
N
E
E
L1
L2
L3
E
E
N
E
L1
L2
L3
E
N
R
L1
L2
L3
E
E
L1
L2
E
E
L
N
E
E
L1
L2
L3
E
E
L1
L2
N
E
E
L1
L2
L3
E
E
N
E
L1
L2
L3
E
N
R
L1
L2
L3
E
E
L1
L2
E
E
L
N
E
E
L1
L2
L3
E
E
L1
L2
N
E
E
L1
L2
L3
E
E
N
E
L1
L2
L3
E
N
R
L1
L2
L3
E
E
L1
L2
E
E
L
N
E
E
L1
L2
L3
E
E
L1
L2
N
E
E
IEC
U
L-N
/ U
L-L
: 417 VLN / 720 VLL
Only suitable to a limited extent in ungrounded networks
U
L-L
600 VLL
UL
U
L-N
/ U
L-L
: 347 VLN / 600 VLL
Two-phase two-conductor
systems
ungrounded
Single-phase 2-conductor
systems
with grounded neutral conduc-
tor
Split single-phase 3-conduc-
tor system
with grounded neutral con-
ductor
Application areas for the
device
• 2, 3 and 4-conductor
networks (TN and TT
networks).
• Residential and industrial
areas.
L1
L2
L3
E
E
N
E
L1
L2
L3
E
N
R
L1
L2
L3
E
E
L1
L2
E
E
L
N
E
E
L1
L2
L3
E
E
L1
L2
N
E
E
L1
L2
L3
E
E
N
E
L1
L2
L3
E
N
R
L1
L2
L3
E
E
L1
L2
E
E
L
N
E
E
L1
L2
L3
E
E
L1
L2
N
E
E
L1
L2
L3
E
E
N
E
L1
L2
L3
E
N
R
L1
L2
L3
E
E
L1
L2
E
E
L
N
E
E
L1
L2
L3
E
E
L1
L2
N
E
E
Only suitable to a limited ex-
tent in ungrounded networks
IEC
U
L-N
480 VLN
IEC
U
L-N
/ U
L-L
: 400 VLN / 690 VLL
UL
U
L-N
480 VLN
UL
U
L-N
/ U
L-L
: 347 VLN / 600 VLL
WARNING
Risk of injury due to electrical voltage!
Rated surge voltages above the permitted over-
voltage category can damage the insulation in the
device. This impairs the safety of the device. This
can result in serious injury or death.
·
Only use the device in environments which
comply with the permissible rated surge
voltage.
·
Observe the limit values specified in the
user manual and on the rating plate.
