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[ECC-MNS] Withdrawable low voltage switchgear

 
 
1   General
       ECC-MNS Low Voltage Withdrawout Switchgear (hereinafter referred to as the Cubicle) is a kind of modular low voltage switchgear by factory based assembly of standard modular units suitably used in power supply system with rated working voltage up to 660V and rated frequency 50~60Hz for control of power generation, transmission, distribution, conversion and consumption equipments.
 
       The Cubicle complies with China national and professional standards such as GB7251.1 “Low Voltage Switchgear” and JB/1996-1”Low Voltage Withdrawout Switchgear”, and international professional standards such as IEC439-1 and VDE0660 Part 5 as well.
 
 
2            Working Conditions
 
2.1        Ambient temperature:  Max. +40℃, Min. -10℃, and the average temperature within 24 hours not over +35℃.
 
2.2        Atmosphere condition:  Clean air, relative humidity not over 50% at the maximum temperature of +40℃ and higher relative humidity allowed at lower temperature, say, 90% at +20℃, yet accidental condensations due to temperature fluctuation should be taken into consideration.
 
2.3        Altitude:  Not exceeding 2000 meters above sea level.
 
2.4        Storage and transportation are supposed to be made in a temperature range between -25℃ and +55℃ with the extreme temperature up to +70℃ within a short term not over 24 hours.  The Cubicle should not be subjected to incurable damage at extreme temperatures and is supposed to operate normally under the above conditions.
 
2.5        If the above mentioned conditions can not be available, discussions should be made between customers and the manufacturer to work out a solution.
 
2.6        Otherwise technical agreement should be signed if the Cubicle is to be used at an offshore petroleum platform or in a nuclear power plant.
 
 
3            Features
 
3.1        Compact in design:  A relatively large quantity of functional units can be hold in a relatively small space.
 
3.2        Universal in structure and flexible in assembly:  C type shaped materials with a module of 25mm are satisfactorily used in various structures, classes protection and working environments.
 
3.3        Standard modular units are designed to form different standard units for protection, operation, conversion, control, regulation, measurement and indication just as actual need of our customers.  More than 200 sub-assemblies may be assembled different withdrawout units in different schemes of frame structures and various advanced intelligent monitoring systems for remote management.
 
 
3.4        Safety:  We adopt a large amount of high intensity flame retardant engineering plastic assemblies which contain no CFC nor halogen and safety performance are greatly enhanced.
 
3.5        High technical performance:  The main parameters reach modern international level and the Cubicle is free of maintenance to a greatest degree.
 
3.6        Space saving:  Field for storage and transportation of pre-fabrication are greatly reduced.
 
3.7        Easy assembly without particular or sophisticated tools.
 
 
4.  Basic parameters
 
4.1  Electrical parameters
 
□        Rated insulating voltage:  660V
□        Rated working voltage:    380V, 660V
□        Maximum working current for main busbar:   5000A
□        Rated short time withstand current of main busbar:         100kA
□        Rated peak value withstand current of main busbar:        220kA
□        Maximum working current of distributing busbar(vertical busbar):  1000A
□        Peak current of distributing busbar(vertical busbar):
105kA for standard type (maximum value)
176kA for enforced type (maximum value)

4.2  Class of protection
 
□        In compliance with IEC529, DIN40050.
□        Protection against solid objects of greater than φ2.5mm as specified in IP30.
□        Protection against solid objects of greater than φ1.0mm as specified in IP40.
□        Protection against dust and liquid spray at all directions as specified in IP54 (Discussion should be made between customer and manufacturer if apparatus with IP54 is ordered)
 
 
 
 
 
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