Page 71 - E24 Electrical Notebook

LV Switchgear MNS Technical Data - 67

MNS Platform Operational Safety & Availability

ABB is the worldwide leader in the production of low voltage switchgears The MNS low voltage switchgear system has been subjected to extensive
with more than 1.5 million cubicles of the MNS system installed since the type tests in compliance with global standards. In order to ensure the
introduction to the market of this technology in 1973. Due to strong highest possible degree of safety, ABB continues to conduct tests as part
application of the modularity concept either for the mechanical or of a continuous development program. These tests are based on the
electrical development, together with the use of unified components, it most critical applications of the entire product or performance range. The
was possible to realise flexible and compact solutions at the same time. results of these tests are applicable to the various low voltage switchgear
Over the years the MNS system has become a reference for this industrial and control gear assemblies in accordance with IEC 61439-1 & 2; DIN
market with regard to safety, reliability and overall quality. EN 60439-1 (VDE 0660 Part 500). In addition to these specifications,
ABB’s comprehensive know-how of the design and construction of low ABB adopted as a standard IEC 61641 for testing under conditions of
voltage systems comes from its experiences in both local and global arcing due to an internal fault. There are five criteria observed for the test
markets. This extraordinary knowledge, together with an extended and in line with its ‘Safety Plus’ statement, ABB ensures that all five are
network for support and assistance all around the world, makes the MNS met. In addition to these criteria, ABB also meets the additional plant
Platform the best choice. protection criteria as detailed in VDE 0660 Part 500.
The main characteristics of the MNS platform are flexibility, together with
the high technology content; due to this mix it is possible to satisfy the Operating Procedures
majority of all customer requests. Optimisation of the configurations is
achieved using ABB’s advanced ACB and MCCB breakers with either The company’s operating systems and procedures are fully certified to
fixed or withdrawable modules. Cables or bus duct entry can be from ISO 9001 requirements, the stringent environmental standards of ISO
either the top or the bottom. 14001 and to OHSAS 18001 Health & Safety requirements.
Safety is one of the key points for the development of the MNS Platform
– indeed all MNS systems can be supplied in “Arc Proof Version” up to After Sales, Service & Maintenance
100kA along with Seismic testing making the ABB MNS System suitable
for installation in critical, harsh and extreme conditions. Routine servicing and maintenance of LV installations by the company’s
highly qualified engineers will ensure that equipment remains safe to
operate – and will minimise the risk of unexpected breakdown and
interruption of supply. Cost-effective packages, which are carefully tailored
to clients’ individual needs, can cover an extensive range of requirements.

Standards & Testing IEC61439-1/-2, CEI 614391

Standards ABB SACE, ACAE LOVAG, SINAL, Cesi and Ismes
Verification by testing * ASTA: Great Britain (resistant to accidental arcs according to IEC 61641 & IEC 60298, Appendix AA)
Test Certificates DRL German Research Institute for Aerospace e.V., Jüllich, Earthquake Test for Security Areas in Nuclear Power Station
IABG Industrieanlagen Betriebsgesellschaft, vibration and shock tests
Complying with Germanischer Lloyd, Hamburg

Electrical Data 1000V AC, 1500V DC **
690V AC, 750V DC **
Rated Voltages Up to 6 / 8 / 12kV **
Rated insulation voltage Ui II / III / IV **
Rated insulation voltage Ue 3
Rated impulse withstand voltage Uimp 50-60Hz
Overvoltage category
Degree of pollution Up to 8000 A
Rated frequency Up to 264 kA
Rated Currents Up to 120 kA
Main busbars:
Rated current Ie Up to 4000 A
Rated peak withstand current lpk Up to 264 kA
Rated short-time withstand current lcw Up to 120 kA
Distribution bars:
Rated current le Up to 100 kA 0.3s
Rated peak withstand current lpk Criteria 1 to 5 and 6 to 7
Rated short-time withstand current lcw
IP20
Arc Proof IP30 standard up to IP54

Test according to IEC 61641 Internal for service
min -5ºC, max 40ºC, average 24h 35ºC
Mechanical Characteristics max 50% at 40ºC
–< 2000m
Degrees of Protection (IEC 60529, EN 60529)
With door open Up to 4b
With door closed Up to 4b type 7
Normal Conditions
Installation Sheathed busbars, treated busbars (Ag/Sn)
Ambient temperature
Relative humidity
Height
Form of Separation
According IEC 61439-2
According BS 61439-2

Options

Busbar Systems
Main and branch busbars

* Design verification by testing: where an assembly has previously been tested in accordance with IEC 60439-1 and the results fulfil the requirements of IEC 61439 1/-2, the verificatio\\\\\\\\\\\\n of these tests need not be repeated.
** Depending on the electrical equipment.

ABB Ltd Tel : +44 (0) 191 514 4555
(Low Voltage Systems) Fax : +44 (0) 191 514 5505
Hanover Place
Sunderland Email : sales.lvs@gb.abb.com
SR4 6BY Website : www.abb.co.uk/lowvoltage