Siemens Simatic RTU303xC Series Operating Instructions Manual page 66

Connecting up, installation, commissioning
3.1 Important notes on using the device
NOTICE
Suitable fuse for the power supply cables (corresponds to "Limited Energy")
The current on the terminal may not exceed 3 A. Use a fuse for the power supply that is
suitable for protection of AC/DC power supply circuits *
3 A.
• In areas subject to the NEC or CEC, the fuse must meet the following requirements:
• In other areas, the fuse must meet the following requirements:
If the properties of the supplying current source are known, the following fuse is also
possible:
• In areas subject to the NEC or CEC, the fuse must meet the following requirements:
• In other areas, the fuse must meet the following requirements:
* AC or DC depending on availability
)
66
– Suitable for AC/DC *
– Breaking current at least 10 kA
– Approval according to ANSI/UL 248-14 (suppl. fuses), ANSI/UL 248-4 (Class CC),
ANSI/UL 248-8 (J), ANSI/UL 248-15 (T), or CSA C22.2-4 No. 248.14 (suppl. fuses),
No. 248-4 (Class CC), No. 248-8 (J), No. 248-15 (T)
– Suitable for AC/DC *
– Breaking current at least 10 kA
– Approval according to IEC/EN 60947-1/2/3 or IEC/EN 60898-1/2 for circuit breakers
– Breaking characteristics: B or C
– Approval according to IEC/EN 60127-1 for fuses
– Breaking characteristics: max. 120 s at 2 x I
4320)
– Suitable for AC/DC *
– Breaking current > highest possible current of the current source (incl. short circuit
current and fault)
– Approval according to UL 1077 or CSA C22.2 No. 235
– Suitable for AC/DC *
– Breaking current > highest possible current of the current source (incl. short circuit
current and fault)
– Approval according to IEC/EN 60934
– Breaking characteristics: max. 120s at 2 x I
(min. 60 V / 3 A)
)
(min. 60 V / 3 A)
)
(min. 60 V / 3 A)
)
(min. 60 V / 3 A)
)
n
Operating Instructions, 06/2019, C79000-G8976-C382-06
and protects against currents >
)
(corresponds to melting integral I
n
t <
2
RTU303xC