Page 243 - Wago_Rail-MountedTerminalBlockSystems_Volume1_2015_US.pdf

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Technical Information 5

241

Current-carrying capacity
[A]
Comm-
ning
30
I t
28
26 Fuse ... A
24 4 / Cross section ... mm²
22
20 Individual arrangement
18 1 10 A / 2.5 mm²
16 3 2 15 A / 2.5 mm²
14 3 20 A / 2.5 mm²
12 2 4 30 A / 4 mm²
10
Inserting a fuse. 8
6 1
4 1 400 V = rated voltage
2 6 kV = rated surge voltage
Temperature rise 3 = pollution degree
0 10 20 30 40 45 50 ∆ T [K] (also see Section 14)
Ambient operating
85 75 65 55 45 40 35 temperature [°C] 2 Electrical ratings are given by the fuse
(also see pages 254 – 255).
Diagram: Individual arrangement 3 Strip length, see packaging or instructions.
Current-carry capacity Information from the mini-automotive 5
[A] blade-type fuse manufacturers
Commo-
ning Derating % F
30 T amb /°C T
28 I t
26 Fuse ... A – 25 14 0.877
24 / Cross section ... mm² – 20 13 0.885
22 4 In a group – 15 12 0.893
20 – 10 11 0.901
18 1 10 A / 2.5 mm² – 5 10 0.909
16 3 2 15 A / 2.5 mm² 0 9 0.917
14 3 20 A / 4 mm² 5 8 0.926
12 2 4 25 A / 4 mm² 10 6 0.943
10 15 4 2 0.962
0.980
20
Blown fuse indication by LED. 8 23 0 1.000
6 1 30 – 2 1.020
4 35 – 4 1.042
2 40 – 6 1.064
Temperature rise 45 – 8 1.087
0 10 20 30 40 45 50 ∆ T [K] 50 – 10 1.111
Ambient operating 55 – 13 1.149
85 75 65 55 45 40 35 temperature [°C]
60 – 16 1.190
65 – 19 1.235
Diagram: Block arrangement 70 – 22 1.282
I rat — Displacement %
40
30
20
10
0
-10
-20 Ambient temperature °C
-30
23°C
-40
-20 0 20 40 60
2-conductor fuse terminal block with mini-automotive The rated currents of the fuse cartridges are defined differ- With regard to the product safety, it is in general neces-
blade-style fuse. ently in international standards. sary to test fuse cartridges under normal conditions and
Due to the different current rating definitions, the recom- operational failures within your application.
mended current-carrying permanent capacity of the fuses
is max. 80% of their rated current according to DIN
72581 part 3 (for an ambient operating temperature of
23°C).
Selecting the correct fuse cartridge is important for product
safety within applications, as well as for fuse cartridge ser-
vice life and operational reliability of the fuse cartridges.
Fuse cartridges can operate perfectly as protection (break-
off point) if they are properly selected and are used in
accordance with manufacturer specifications.