MNS Low Voltage Withdrawable Switchgear
MNS Low Voltage Withdrawable Switchgear
Rated insulation voltage:AC 660(1000)V
Main circuit:AC 380(660)V 400v
Auxiliary circuit:AC 380, 220, 24V DC110, 220V
Description
Product overview
MNS low-voltage switchgear is a combined type low-voltage switchgear device.
The switchgear is applicable for systems of AC50-60Hz and rated working voltage up to 660V, used in power plants, power distribution station, factories, enterprises, hotels, malls and so on for electric energy conversion as well as control, power factor compensation of electrical equipment. This switchgear not only is applicable for land use, but also is suitable for offshore oil drilling platform and nuclear power station after special treatment.
It complies with the standards IEC439, VDE0660 Part 5 and GB7251-97 Low-voltage switchgear and controlgear assemblies.
Structure
The basic framework of the device is combination assembly structure, the entire structure of cabinet has been galvanized and the basic frames are connected by thread forming screws or 8.8 hex screws, and then adds corresponding doors, seal plates, partitions, mounting brackets, busbar, functional units and other components according to the scheme to form a complete unit, the internal dimensions and the partition size of the device are modularization (modulus unit E=25mm).
Ambient conditions
● Ambient temperature: not exceed +40℃, average temperature within 24h not exceed +35℃;
● Air should be clean. Air relative humidity should not exceed 50% at +40℃, higher relative humidity is permissible at lower temperature condition, for instance, 90% at +20℃, please take measures for the condensation produced on the product caused by temperature change occasionally;
● Altitude should not exceed 2000m;
● The MNS Low voltage switchgear should be transported and stored within the temperature range -25℃~55℃, and temperature should not beyond 70℃ in a short period (within 24h); under these limit conditions, the device should be protected against any unrecoverable damage, and should be able to work normally under normal conditions;
● If beyond abovementioned conditions, we would like to settle the problem of special requirements through friendly negotiation.
● We’d like to come to an agreement separately for switchgears intended for offshore oil drilling platforms and nuclear power stations.
Technical parameters of switchgear
| Rated insulation voltage | V | AC 660(1000)V | |
| Rated working voltage | Main circuit Auxiliary circuit |
V V |
AC 380(660)V AC 380, 220, 24V DC110, 220V |
| Rated frequency | Hz | 50(60)Hz | |
| Rated current of horizontal bus | A | ≤4000A | |
| Rated current of vertical bus | A | 1000A | |
| Rated peak withstand current | KA | 105(176)KA | |
| Rated short-time withstand current | KA | 50(80)KA | |
For know more about us,welcome visit:www.en.jxyikai.com
| Ordering instruction | |
| Please provide those below detailed information, when you order the switchgear. | |
| 001 | Main connection wire solution serial number and single line system diagram, arrangement and
plane layout drawing |
| 002 | Main connection line solution serial number, purpose and single line system diagram, rated voltage,
rated current, rated short circuit breaking current, distribution electricity chamber plane layout diagram, arrangement diagram of switchgear and so on. |
| 003 | Secondary connection wire diagram, terminals arrangement diagram. If you can’t provide terminals
arrangement diagram, we will provide the terminals arrangement according to manufacturer’s diagram. |
| 004 | Requirement of switchgear control,measurement and protection function and requirement of other
shutting and automatic device. |
| 005 | Model, specificaton, quantity of switchgear equipment’s electrical apparatus elements |
| 006 | Electrical equipments summary sheet |
| 007 | If the interspace of switchgears or incoming line cabinet need bus line bridge to connect, please provide
rated load current of bus line bridge. |
| 008 | If you need busbar (busbar between two array cabinets and busbar between wall cabinets), please provide
detailed span and high altitude distance. |
| 009 | If the switch equipment are used in the special environment conditions, please put forward it when you
order the switchgear. |
| 010 | When you need other apparatus or exceed attachment supplied equipment list, please put forward model
nd quantity you need. |
| 011 | Other special requirements. |
FAQ:
| 001 | Q | What is electrical switchgear |
| A | Electrical switchgear is a key component in electrical power systems and is used to both distribute electrical
power and to selectively isolate electrical loads. breakers, protective and controlling devices which can be used to isolate electrical apparatus in faulty condition or during maintenance period, or to connect the same in desired healthy conditions. |
|
| 002 | Q | Do we need to monitor the switchgear conditions |
| A | Yes, Because switchgear distributes electrical current, heat build-up becomes an important characteristic
to monitor. In particular, unexpected temperature rise at a particular location could indicate corrosion or some other type of defect. Thermal effects are especially visible in medium voltage switch gears used in distribution networks, where electrical currents may rise to few thousands of amperes. Thus keeping switchgears in proper condition over their long life becomes a critical issue. |
|
| 003 | Q | What are the main causes of arc flashes in industrial switchgear? |
| A | The main causes of arc flashes in industrial switchgear are: the application of tools to energize switchgear,
deteriorated insulation on phase bus bars, and loose electrical connections that overheat. These things can be prevented by proper safety measures and regular maintenance. |
|
| 004 | Q | What is the lowest voltage at which arc flashes occur? |
| A | 120 volts is generally considered the lowest voltage at which arc flashes occur. The voltage of industrial
switchgear can exceed this voltage by hundreds of thousands of times. |
|
| 005 | Q | What is Metal Enclosed Switchgear? |
| A | Metal Enclosed Switchgear is a switchgear assembly that encloses all necessary equipment and device in
separate metal vertical structure (i.e MCCs, PCC), however they each metal compartment are not separated from one another by metal barriers. It’s used often with low voltage equipment. |
|
| 006 | Q | What is Metal Clad switchgear? |
| A | Metal Clad Switchgear is a switchgear assembly that encloses all necessary equipment and devices in one
metal house, but compartments in this assembly is separated fromone another by metal barrier. When metal clad switchgear is used or assumed when MV switchgear is provided. |
|
| 007 | Q | Difference between Metal Enclosed Switchgear and metal Clad Switchgear. |
| A | Metal enclosed switchgear: Assembled with separate metal vertical section Metal Clad Switchgear: Assembled in one metal structure. MES: each compartment is not separated from one another with metal barrier. MCS: each compartment is separated from one another with metal barrier. MES: Frequently used in LV system. MCS: Frequently used in MV System. When MCS is said MV Switchgear is assumed. MES: All breakers and other switching devices are fixed type. MCS: All breakers are withdrawable type. |
|
| 008 | Q | How’s your electrical switchgear waranty? |
| A | Once you buy the product manufactured by Jiangxi Yikai Electric can get 24 months waranty after delivery date. |
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