PHOENIX CONTACT
17
UL 1059 "Terminal Blocks"
In order for Phoenix Contact products to be able to be used
in industrial applications without restrictions, they are generally
tested and recognized in accordance with UL 1059.
The following table lists the air clearances and creepage distances
required for the components. The use group refers to the
subsequent area of application of the end device.
Components certified in accordance
with UL1059 UseGroupC:
Can be used without restriction in devices
certified in accordance with UL508, UL508C or
UL61800-5-1.
Can be rated alternatively in accordance with
UL840/IEC60664-1 and used in factory wiring
applications in accordance with UL508 (C)/
UL61800-5-1.
UL 508 "Industrial control equipment"
Terminal blocks, which are recognized in accordance with UL 1059
Use Group C, meet the requirements of UL 508 for field wiring
terminal blocks and can thus be used in accordance with this
standard without restriction. In certain cases, UL 508 also permits
the alternative rating in accordance with UL840.
UL 508 C "Power conversion equipment"
This UL standard applies specifically to power electronics
(including frequency inverters). The requirements for field wiring
terminal blocks are equivalent to the specifications of UL 508.
Alternative rating in accordance with UL 840 is also possible here
in certain cases.
UL 61800-5-1 "Adjustable Speed Electrical Power Drive
Systems - Part 5-1: Safety Requirements [...]"
UL61800-5-1 is a new standard for power electronics. Here as
well, the requirements for field wiring terminal blocks are similar
to the specifications of UL508. An alternative rating in accordance
with IEC60664-1 is possible here in certain cases.
UL 840 "Insulation coordination including air clearances
and creepage distances for electrical equipment"
This standard describes an alternative procedure for designing
the insulation of end products for defined ambient conditions
(overvoltage category, pollution degree, material index), provided
that this is permitted by the device standard.
Use
group
Area of application
Max. voltage
(V)
Required distances (mm)
Clearance
Creepage
distance
A
Operating elements,
consoles, and similar
150
300
600
12.7
19.1
25.4
19.1
31.8
50.8
B
Conventional devices,
including office and
electronic data processing
equipment and similar
150
300
600
1.6
2.4
9.5
1.6
2.4
12.7
C
Industrial applications,
without restrictions
150
300
600
3.2
6.4
9.5
6.4
9.5
12.7
D
Industrial applications,
operating equipment with
limited performance data
(limited rating)
300
600
1.6
4.8
3.2
9.5
E
Connection technology
for the power range
600 – 1500 V
601 – 1000
1001 – 1500
14
17.8
21.6
30.5
F
Industrial applications,
equipment that has been
assessed in accordance
with UL 508, 508C, 840
51 – 600
As defined in the device
standard
UL certification in accordance with product and device standards
Voltage sufficient for application
Voltage insufficient for application