Conforming To Standards And Design-Verified; The Product Standard Iec 61439-2; Conforming To Standards And Design - Siemens Sivacon S8 Planning Information

9 Conforming to standards and design-

verified
9.1 The product standard
IEC 61439-2
Low-voltage switchboards, or "power switchgear and
controlgear assemblies" according to the standard, are
developed and manufactured according to the specifica-
tions of IEC 61439-2 and their compliance with the stand-
ard is verified. To prove the suitability of the switchboard,
this standard requires two essential types of verification –
design verification and routine verification. Design verifica-
tions are tests accompanying development, which must be
performed by the original manufacturer (designer). Routine
verifications must be performed by the manufacturer of the
power switchgear and controlgear assembly (switchboard
manufacturer) on every manufactured switchboard prior to
delivery.
Design verification test
The SIVACON S8 switchboard ensures safety for man and
machine by means of design verification (Tab. 9/1) by
testing in accordance with IEC 61439-2. Its physical proper-
ties are rated in the test area both for operating and fault
conditions and ensure maximum personal safety and
system protection. These design verifications and routine
Tab. 9/1: Test for the design verification in accordance with IEC 61439-2
The table shows all verifications required by the standard
. They can be delivered by three alternative
possibilities.
1. Strength of solid matters and components
2. Degree of protection of enclosures
3. Creepage distances and clearances
4. Protection against electric shock
and integrity of protective circuits
5. Incorporating equipment
6. Internal electric circuits and connections
7. Connections for conductors entered from the outside
8. Dielectric properties
9. Temperature rise limits
10. Short-circuit strength
11. Electromagnetic compatibility (EMC)
12. Mechanical function
1) Effectivity of the assembly in case of external faults
2)
Only impulse withstand voltage
3)
Comparison with an already tested design
80 SIVACON S8 Planning Principles – Conforming to standards and design-verified
verifications are a pivotal part of quality assurance and
constitute the pre-requisite for CE marking in accordance
with EC Directives and legislation.
Verification of temperature rise
One of the most important verification procedures is the
"verification of temperature rise". In this procedure, the
switchboard's suitability for temperature rises owing to
power loss is verified. Because of ever rising current ratings
and concurrently increasing requirements of degree of
protection and internal separation, this is one of the great-
est challenges switchboards are confronted with. According
to the standard, this verification can be performed by
calculation up to a rated current of 1,600 A. For SIVACON
S8, this verification is always performed by testing. Rules
for the selection of test pieces (worse case test) and the
testing of complete assemblies ensure that the entire
product range is systematically covered and that this verifi-
cation always includes the associated devices. This means
that testing randomly selected test pieces suffices no less
than replacing a device without repeating the test.
Verification by Verification by
testing calculation
ü
ü
ü
ü
-
-
-
ü
ü
up to 1,600 A
ü
Conditional
ü
ü
Verification by
design rules
- -
-
ü
ü ü
ü 1) ü 1)
- ü
-
ü
- ü
-
ü 2)
up to 630 A
3) Conditional
- ü
- -
3)
3)