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Appendix
Approvals and certificates
17/4
Siemens ET A1 · 10/2008
17
The standard VDE 0660-500 /-504; EN 60439-1/-3;
IEC 60439-1/ -3 is one of the most important standards for
distribution systems. It stipulates the requirements for the safe
operation of low-voltage switchgear assemblies.
The standard VDE 0660-500; EN 60439-1 distinguishes
between:
• TTA (type-tested switchgear assemblies)
TTA refers to factory-assembled switchgear combinations that
conform to an established type or system without deviations
likely to significantly influence the performance from the typi-
cal assembly verified to be in accordance with the standard
DIN VDE 0660-500.
• PTTA (partially type-tested switchgear assemblies)
PTTA refers to switchgear assemblies, including factory-
assembled, type-tested and non-type-tested arrangements,
which comply with the relevant test requirements as specified
in DIN VDE 0660-500.
Both versions (TSK and PTSK) are equivalent to each other. They
offer the same level of safety and the same high standard of
quality. The difference between TTA and PTTA lies in the scope
and the type of tests performed.
All switchgear assemblies produced with type-tested compo-
nents are required to undergo routine tests (according to
Table 7, sections 8.3.1 ...) 8.3.4 of the aforementioned regula-
tions). These switchgear assemblies are then TTA-approved
In the case of switchgear assemblies containing both type-
tested and non-type-tested arrangements, proof must be pro-
vided (according to Table 7 of the aforementioned standard) that
the latter are derived (e.g. by calculation) from type tested ar-
rangements which have complied with the relevant tests. These
switchgear assemblies are then PTTA-approved
For further information on approvals and certificates, please
refer to
http://www.siemens.com/automation/service&support
1)
This type of distribution board does not need to be tested according to EN 60439-3.
7 Type tests
1. Proof of compliance with the temperature-rise limit
2. Proof of insulation resistance
3. Proof of short-circuit strength
4. Proof of the proper connection between the bodies of the switchgear
assemblies and the protective conductor by monitoring the resistance
measurement
5. Proof of creepage distance and clearance
6. Proof of mechanical functionality
7. Proof of IP degree of protection
3 Routine tests
1. Wiring, electrical functionality
2. Insulation
3. Protective measures
4. Insulation resistance
Product groups
VDE
EN
DIN
IEC
Meets requirements of
8.2.1 - 8.2.7 acc. to
EN 60439-1
Meets requirements of
8.2.9 - 8.2.15 acc. to
EN 60439-3
ALPHA distribution boards
ALPHA 160
DIN VDE 0660-500/504 EN 60439-1/-3
--
IEC 60439-1/-3
✓
✓
ALPHA 400
DIN VDE 0660-500/504 EN 60439-1/-3
--
IEC 60439-1/-3
✓
✓
ALPHA 630
DIN VDE 0660-500/504 EN 60439-1/-3
--
IEC 60439-1/-3
✓
✓
ALPHA small distribution boards
SIMBOX 63
DIN VDE 0603-1,
DIN VDE 0660-500/504
EN 60439-1/-3
DIN 43871 IEC 60439-1/-3
✓
✓
ALPHA 400-ZS
ALPHA 400-ZS
meter cabinets
DIN VDE 0603-1,
DIN VDE 0660-500/504
EN 60439-1/-3
DIN 43870 --
✓
✓
ALPHA 8HP molded-plastic distribution systems
ALPHA 8HP molded-
plastic distribution
systems
DIN VDE 0660-500
EN 60439-1
--
IEC 60439-1
✓
1)
ALPHA modular distribution boards
ALPHA AS modular
distribution boards
DIN VDE 0660-500/504 EN 60439-1/-3
--
IEC 60439-1/-3
✓
✓
ALPHA 1600 modular
distribution boards
(SIKUS)
DIN VDE 0660-500
EN 60439-1
--
IEC 60439-1
✓
✑✉
© Siemens AG 2008
