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MNSI low voltage switch cabinet

Brand: RENDA
Model: MNSI
Updated: 2015-10-29
  • Product description
  • Scope of application
  • Product features
  • Technical parameters

1. Product overview

 

The full name of MNSI switchgear is MNSI type low-voltage withdrawable switchgear.

 

The design of MNSI switchgear was imported from Germany and is ABB's global standard project for more than 40 years. This low-voltage withdrawable switchgear has been widely used by power users.

 

This equipment conforms to the International Electrotechnical Commission IEC439-1 "low-voltage switchgear and control equipment", China's GB7251-1997 "low-voltage switchgear and control equipment", China's national standards and machinery industry association JB/T9661-1999 standard content, and in line with CQC's CCC national compulsory certification standard.

 

2. Product use

 

As the control of power generation, transmission and distribution, power conversion and energy consumption equipment, and through the capacitor compensation cabinet for reactive power compensation of its main busbar.

 

3. Environmental conditions of product use

 

(1) The ambient air temperature is not higher than +40 °C, not less than -5 °C, and its average temperature is not higher than +35 °C within 24h.

 

(2) The relative humidity of the surrounding air does not exceed 50% when the maximum temperature is +40. At lower temperatures there are larger relative temperatures, such as 90% at +20, but take into account the by

 

Temperature changes may occasionally produce moderate condensation.

 

(3) For indoor use, the altitude of the place of use does not exceed 2000m.

 

(4) It should be installed in a place where there is no severe vibration and impact, and no electrical components are corroded.

 

This switchgear is suitable for power plants, substations and large buildings, high-rise buildings, airports, hospitals, theaters, stadiums, ports, underground facilities, industrial and mining enterprises, etc., as a three-phase AC 50HZ rated voltage below 2500KVA system for power reception, feeding and motor control. It can meet the computer interface with power use occasions such as power plants with large single capacity, low-voltage power control centers and motor control centers in large-scale petrochemical industries.

      本开关柜由于引进了ABB的先进技术,并在其原有的基础上加以技术改进,使其更符合我国国情,柜体采用25mm为模数的C型材通过连接件来组成各种得 以满足各种需求的柜架结构和抽屉单元,在MCC柜中大量采用高强度的阻燃型工程塑料组件,使其安全性能更可靠,同时加之将国外的功能版加以改型,以 200mm为模数加以组合,使其更有利于PC柜与MCC柜混装柜体的设计需求,抽出单元与柜体具有可靠联锁装置,以防止在开关通电状态下带负荷拉闸,提高 了其安全性,另外该柜体一般均采用冷轧钢板进行钝化处理后组装而成,也可根据用户的不同需求采用敷铝锌铜板。

1.开关柜类型

a.受电、母联柜

b.动力中心柜(PC):采用国内外的各种类型的框架式断路器如AHCW1AERMW1ME系列断路器进行配电。

c.电动机控制中心柜(MCC):由大小抽屉组装而成,各回路主开关采用高分断能力的塑壳断路器或旋转式带熔断器的负荷开关。

d.无功率补偿柜

2.抽屉类型

有五种尺寸都是以8E200mm)高度,进行模块化结构设计,其有效元器件安装高度为1800mm,使柜体整体布局更合理,更美观。

8E/48E高度空间平行组合4个抽屉单元

8E/28E高度空间平行组合2个抽屉单元

8E8E高度空间组装1个抽屉单元

16E16E400mm)高度空间组装1个抽屉单元

24E24E600mm)高度空间组装1个抽屉单元

以上五种抽屉单元可在一个柜体中作单一组装,也可做混合组装

3.柜体简介

3.1柜体基本尺寸

a.受电柜及联络柜

 

 

主母线转接柜

1台断路器

高(mm

2200

2200

宽(mm

400

600  800  1000

深(mm

800  1000

800  1000

备注

 

AH-40C及以下载流量且体积较小的同类断路器

 

 

 

b.动力中心(PC)柜

 

 

2台断路

3台断路

高(mm

2200

2200

宽(mm

800   1000

800   1000

深(mm

800   1000

800   1000

备注

AH-20C及以下载流量且体积较小的同类断路器

AH-10B及以下载流量且体积较小的同类断路器

 

 

 

c.电动机控制中心(MCC)柜及电容补偿柜

 

 

MCC

电容补偿柜

宽(mm

 

2200

 

2200

高(mm

600

800

1000

600 800 1000

深(mm

1000  800

1000   800

1000 800 600

800 1000 600

 

 

 

3.2柜体分区设计

MCC柜根据需要可组成单面操作或双面操作柜,每一柜体又固定分割成三个小室。即主母线室、电器室和电缆室。

3.3安全保护系统

每柜设有一块阻燃型的高密度聚氨酯塑料功能板,或经过电镀的隔板安装在主母线室与电器室之间,其作用为有效防止开关元件因故障引起的飞弧与母线之间短路造成的事故使操作更安全。

上下层抽屉之间都有带有通风孔的镀锌金属底版相隔离,较小的8E/48E/2抽屉其四周均为阻燃型工程塑料件,对相邻回路之间具有较强的绝缘隔离作用。

柜内采用了多种塑料组件以支撑带电部分,这些组件要求是无卤素的。并具有CTI300防漏电性能。

3.4母线系统

开关柜可配置二组主母线,安装在开关柜的后部母线室,二组母线可分别安装在柜后上部或下部,根据进线需要,上下二组母线可分别采用不同或相同截面的材料。 二者既可单独供电,也可并联供电,也可用作后备电源。配电母线(垂直母线)组装在阻燃型塑料功能板中,既可防止电弧引起的放电,又能防止人体接触,通过特 殊联接件与主母线联接。

柜内设有独立的PE接地系统和N中性导体,二者贯穿整个装置,安装在柜前底部及右侧,个回路接地或接零都可就近联接。整个母线系统安装见图三所示。框架结构件采用自攻螺钉联接,具有较高的接地可靠性。

3.5抽屉的电气和机械联锁

抽屉单元由可靠的机械连锁装置,通过操作手柄控制,具有明显的准备,合闸、试验、抽出和隔离位置。为加强安全防范,操作手柄定位后可加上挂锁,最多可加三把锁。

 

标准及技术规范

GB7251.1-1997低压成套开关设备和控制设备(TTA

 

JB/T9661-1999低压抽出式开关成套设备

过电压类别

Ⅳ Ⅲ

污染等级

3

额定工作电压(Ue(U)

380660

额定绝缘电压(Ui(V)

6601000

额定频率(Hz

5060

水平母线

 

额定电流

5000A 4000A 3150A 2500A 2000A 630A

额定短时耐受电流(lcw(KA)

5065,80,(ls有效值)

额定峰值耐受电流(lpk(kA)

105,140,176,(0.ls******值)

垂直母线

 

额定******工作电流

1000A

额定短路时耐受电流

50KA

额定峰值耐受电流

105kA

外壳防护等级

IP30 IP40(特殊说明)

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