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Line connection and line-side power components
3.3 Overcurrent protection by means of line fuses and circuit breakers
Table 3- 3
Recommended line fuses and circuit breakers for Smart Line Modules booksize and booksize compact format
5 kW
I
fuse
16 A
n
LV HRC line fuse
3NA3 805
Circuit breaker
3RV2021-4BA10
(IEC 60947)
UL-application
Rated current
17.5 A
Line fuse
AJT17-1/2
1)
Rated current
20 A
Circuit breaker
3VL1102-2KM30
Type AJT Class J, source: The Ferraz Shawmut company
1)
If used in conjunction with a residual-current monitor (RCM), circuit breakers providing an
"undervoltage tripping" option must be used, with the following suffixes added to the order
numbers:
...-2AJ0 for 380 VAC - 415 VAC
...-2AK0 for 440 VAC - 480 VAC
WARNING
Danger to life through electric shock as well as fire hazard due to overcurrent protective
devices that trip too late
Overcurrent protective devices that do not trip or trip too late can cause an electric shock or
fire.
• To protect personnel and for fire protection purposes, at the infeed point, the short-
circuit rating and loop impedance must correspond to the specifications in the
documentation in order for the installed overcurrent protection devices to trip within the
specified time.
• In addition to suitable overcurrent protection devices, in TT line systems use ground-
fault circuit interrupters (residual current devices - RCD); from an infeed power of 55 kW
or for plants and systems extending over a wide area, in addition also use differential
current monitoring devices (residual current monitors - RCM).
Note
The devices can be connected to supply systems up to 480 VAC, which can feed a
maximum of 65 kA symmetrical ("prospective current" according to EN 60269-1).
52
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10 kW
16 kW
35 A
35 A
3NA3 814
3NA3 814
3RV1031-4FA10
3RV1031-4FA10
35 A
35 A
AJT35
AJT35
35 A
35 A
3VL1135-2KM30
3VL1135-2KM30
36 kW
55 kW
80 A
125 A
3NA3 824
3NA3 132
3RV1041-4LA10
3VL2712-1DC33
80 A
125 A
AJT80
AJT125
80 A
125 A
3VL2108-2KN30
3VL2112-2KN30
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
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