phb2013_complete_en.pdf [18.3 MB] - Wöhner

Short-circuit strength diagrams according to IEC/EN 60439-1 (resp. IEC/EN 61439-1/2)
for 185mm busbar systems and centre-feed unit
( ) Measured values from type tests
Busbar Schienenträger support Nr. 01 230 01 230
185mm-System power
lpk surge current (kA)
120
110
100
90
80
70
Schienenträger Busbar support Nr. 01 508 01 508
25
20
15
10
5
0
400 500 600 700 800
200 300 400 500 600
Centre-feed Zentraleinspeisung unit
Current Stromfluss fl ow über through 80% der 80% Schienenlänge
of busbar length
Short-circuit strength diagrams according to UL 845 for 60mm busbar systems
( ) Measured values from type tests
60 x 10
720mm 2 *
120 x 10
100 x 10
80 x 10
* mounted with at least one NH in-line fuse switch disconnector size 1/2/3
Allocation of surge current to effective value of the short-circuit current
according to IEC/EN 60439-1 (or IEC/EN 61439-1/2)
Values of factor n
Busbar support clearance (mm)
Eff ective value of the short-circuit current cos φ n
/ ≤ 5 0.7 1.5
5 < / ≤ 10 0.5 1.7
10 < / ≤ 20 0.3 2
20 < / ≤ 50 0.25 2.1
50 < / 0.2 2.2
lpk surge current (kA)
Busbar support clearance (mm)
30 x 5, 10
12, 20 x 5,
12, 20 x 10
Additional SCCR values in installation instructions 94717
e.g. SCCR 100 kA: 500 A, 30 x 10, 800 mm centre distance
lpk surge current (kA)
120
110
100
90
80
70
50
40
30
20
10
0
400 500 600 700 800
Busbar support clearance (mm)
Schienenträger Busbar support Nr. 01 231 01 231 / 01 / 232 01 232
200 400 600 800 1000
Technical specifications
3- and
4-pole
720mm 2
According to Table 7 as per IEC/EN 61439-1 or Table 4
according to IEC/EN 61439-1, the factor n is used
to determine the ratio between surge current Ipk and the
eff ective value of the short-circuit current by taking the power
factor into account.
See IEC/EN 61439-1 for deviations.
lpk surge current (kA)
Busbar support clearance (mm)
TTT
1140mm 2
TT 500mm 2
TT 720mm 2
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