PACT Analog
103359_en_03 28
PHOENIX CONTACT GmbH & Co. KG • 32823 Blomberg • Germany • Phone: + 49 5235 3-00
PHOENIX CONTACT • P.O.Box 4100 • Harrisburg • PA 17111-0100 • USA • Phone: +717-944-1300
www.phoenixcontact.com
9 Safe isolation
Operating voltages by comparison
9.1 Application example with safe isolation up to 1 kV
– The current transformer converts the high current down
to 1 A AC or 5 A AC.
– A downstream current transducer creates a standard
signal from the secondary current.
Figure 5 Application example
EN 60044-1
1
1
EN 60044-1: Measuring transducers - Part 1: Current transformer
EN 50178
2
2
EN 50178: Electronic equipment for use in power installations
Rated insulation voltage:
(operating voltage)
480 V (L-L)
7280 V (L-L)
1000 V (L-L)
/
277 V (L-L)
416 V (L-L)
577 V (L-L)
1000 V (L-L)
Impulse withstand voltage for transformer testing:
at 277 V (L-N)
at 1000 V (L-N)
3 kV
3 kV
6 kV
12 kV
e.g.,
Ethernet
SELV = Safety Extra Low Voltage
0 to 10 V
Inline controller
4 to 20 mA
5 A AC
1 A AC
Safe isolation
according to EN 50178
Motor
EN 60044-1
applies only to here.
Rated insulation voltage
up to 1000 V (L-N)
