Poznámky redaktora
9 Insulation properties: 10.
The final assessment has made the end use. Characteristics proved Section Adaptability for terminal blocks
1 Strength material and parts: 10.
• Surge voltage strength 10.11 For cross sections mm²
In sectors after current-limiting (5ms) protections devices <100 (fort Icp <10 kA)
At unaffected short-circuit current the grid Icp <=10 (in front the switchgear), forward
current with maximum will arise with upstream protection device.7 Terminal blocks bear the inscriptions, like determined section the product standard.8 Secured selection the terminal block well its type test according 60947-7-1(2).26
Cross section/mm² 120 150 185 240 300
Electrical resistance/mΩ 0.4 The required creepage distances are based 60664-1 and are identical with the values for the
dimensioning terminal blocks according 60947-7-1(2, 3).
7 Internal circuits and connections 10.
properties insulation material: 10.
• Resistance radiation 10.2.
4 Creepage distances 10.
6 Installation equipment 10.
2 Degree protection and enclosures 10.13 Not relevant
C.3 The verification for the switchgear and controlgear assembly takes place the end use for the terminal blocks.Checklist design verification according IEC/EN 61439
Design verification for terminal blocks and their accessories
Nr.2 measurement the end use.2.2.33 1.34 CAT1 Version 2025
Installation
C
Standards and industries
.09 0.g.9 Tests the insulation properties are part the dimensioning type tested terminal blocks
• Operating frequency dielectric strength 10.32 0. According the section 10.
conductive parts the assembly and the
protective circuit
• Short-circuit withstand strength the protective 10.2. conductor terminals are subjected
circuit test short-time withstand current the context the type test according 60947-7-2.2 The requirements refer exclusively parts the switchgear and controlgear assembly.2. The switchgear manufacturer has provide
evidence for the maximum forward current declaration the terminal block’s Ipk
(surge current strength, which the terminal block able conduct without being destroyed).9.1
• Resilience extreme heat and fire due 10.00 0.12 Not relevant, because terminal blocks are seen passive components according the product standard 60947-7-1(2, 3).3 Terminal blocks are designated for the installation cabinets, thus not relevant
3 Clearances 10.
5 Protection against electric shock and 10.7 Not relevant, has judged the end use for terminal blocks.
• Thermal stability 10.2 61439-1,
the switchgear manufacturer does not have provide evidence this case.21 0.3 Not relevant, has judged the end use.83 1.
The verification has provided for the respective application, e.17 0.10 0. This requirement fulfilled protection
devices 100 equipment (application mm² terminal blocks).5.5 Covered the type test for modular conductor terminals according 60947-7-2.2.42 0.
13 Mechanical operation 10. measurement calculation.56 0.5 35
Electrical resistance/mΩ 1.78 0.
8 Connections for conductors inserted from outside 10.08 0.9.5 2.2.14 0.5 Terminal blocks are designated for the installation cabinets, thus not relevant
• Impact test 10.6 Terminal blocks are designated for the installation cabinets, thus not relevant
• Marking 10.
to internal electrical effects Inserted components like terminal blocks are not affected.4 The required clearances are based 60664-1 and are identical with the values for the
dimensioning terminal blocks according 60947-7-1(2, 3).2 according 60947-7-1(2).2.
For cross sections from mm²
In sectors after current-limiting ms) protection devices <=630 (Icp >10 kA)
At unaffected short-circuit current the grid Icp >10 (in front the switchgear), forward current will flow
of the period with upstream protection device.3.06
11 Short-circuit withstand strength 10.6 Installation and tight fit terminal blocks secured the requirements and relevant tests according the product standard.11.3.
The calculation the terminal block‘s power dissipation can take place the application means
of the electrical resistance function current: Ploss
= Rmax
* I2
Following maximum resistances per electrical potential according to
EN 60947-7-1(2, subject the cross section for the terminal block are permitted:
Cross section/mm² 1.12 0.
12 Electromagnetic compatibility 10.2 The requirements refer exclusively cabinets for switchgear.10 The rated values for terminal blocks according 60947-1(2 ,3) can used for the dimensioning the temperature rise limits.3 Terminal blocks are designated for the installation appropriate cabinets.
10 Temperature rise limits 10.4 Terminal blocks are designated for the installation cabinets, thus not relevant
• Lifting 10.2
• Corrosion resistance 10.5.
integrity protective circuits The quality and consistency the conductor connection has verified resistance
• Effective continuity between the exposed 10
