UL tests

Temperature-rise

UL have carried out tests on complete switchboards up to 5000A. The temperature-rise did not exceed 65K with tin plated copper bars or 50K with none plated copper bars. Likewise, the temperature-rise in motor starter units did not exceed maximum limit.

Verified by:

Underwriters Laboratories Inc.
UL 67, UL 508 A, UL 845 and UL 891
Canadian Standards
CSA C22.2 No. 14-95
CSA C22.2 No. 31-M89
CSA C22.2 No. 29-M1989

Dielectric voltage withstand

The CUBIC modular system has been tested to 2.2 kV for 1 minute without breakdown. The tests were carried out between:
a. Uninsulated live parts and enclosure
b. Terminals of opposite polarity
c. Uninsulated live parts of different circuits.

Verified by:

Underwriters Laboratories Inc.
UL 67, UL 508 A, UL 845 and UL 891
Canadian Standards
CSA C22.2 No. 14-95
CSA C22.2 No. 31-M89
CSA C22.2 No. 29-M1989

Short circuit withstand

The CUBIC busbar systems up to 5000A (S7000) have been tested by UL.
The following short circuit rating (RMS) was obtained, I: Up to 100 kA.

Verified by:

Underwriters Laboratories Inc.
UL 67, UL 508 A, UL 845 and UL 891
Canadian Standards
CSA C22.2 No. 14-95
CSA C22.2 No. 31-M89
CSA C22.2 No. 29-M1989

Grounding and bounding

In CUBIC assemblies the effective connection between the exposed conductive parts has been tested by UL.
The resistance between the ground bus and either an exposed dead metal or the ground contact was tested to be less than 0.1 ohm. Likewise, the resistance between the ground bus and the grounding contacts was measured to be less than 0.005 ohm.

Verified by:

Underwriters Laboratories Inc.
UL 67, UL 508 A, UL 845 and UL 891
Canadian Standards
CSA C22.2 No. 14-95
CSA C22.2 No. 31-M89
CSA C22.2 No. 29-M1989

Spacings

The spacing through air and over surface is made such that it can be verified for up to 600 V in CUBIC assemblies.

Verified by:

Underwriters Laboratories Inc.
UL 67, UL 508 A, UL 845 and UL 891
Canadian Standards
CSA C22.2 No. 14-95
CSA C22.2 No. 31-M89
CSA C22.2 No. 29-M1989

Environmental rating

The CUBIC modular system is in standard version tested by UL to type 1,2 5 and 12

A special version in stainless steel has further been tested to type 4 and 4x.

Verified by:

Underwriters Laboratories Inc.
UL 67, UL 508 A, UL 845 and UL 891
Canadian Standards
CSA C22.2 No. 14-95
CSA C22.2 No. 31-M89
CSA C22.2 No. 29-M1989

Main type-tested electro-technical data.

Rated voltage and frequency:      Up to 600 V; 50-60 Hz
Rated current:                              Up to 5000 A
Bus short circuit bracing:              Up to 100 kAmp RMS
Enclosure types                            Type 1,2,5,12

Verified by:

Underwriters Laboratories Inc.
UL 67, UL 508 A, UL 845 and UL 891
Canadian Standards
CSA C22.2 No. 14-95
CSA C22.2 No. 31-M89
CSA C22.2 No. 29-M1989

News

29-4-2010

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