KTC正压防爆仪表、配电盘、柜、箱(IIB、IIC)
   
适用范围
1、爆炸性气体环境：1区、2区
2、场所中危险气体或蒸气：IIA、IIB、IIC
3、温度组别：T1～T4
4、环境温度：-20℃～+40℃
5、户内、户外)

Applying scope
1、Explosive gas atmospheres:Zone 1＆2
2、Dangerous gases or vapors zone: IIA、IIB、IIC
3、Temperature classes:T1～T4
4、Environment temperature:-20℃～+40℃
5、Indoor and outdoor



   
型号含义 Type designation  
   
主要技术参数  
1、防爆标志：Expdem II BT4 Expdem II CT6 2、防护等级IP54(可达IP56)
3、副（柜箱）内供电220VAC±10% , 50-60HZ, 10A
4、输入气源：0.4-0.8MPa,净化空气或氮气等保护气体
5、进气口为：G1/2 6、换气量为：10-20m3/h
7、换气时间：10-30min(由防爆检测单位确定，tp=5×V/Q, tp：换气时间，V:主腔内净容量，Q:保护气体的流量）
8、耗气量为：2-8m3/h (根据盘、柜的容积和面板操作元件的多少及其密封程度而定）
9、功能指标：
a)仪表、电器供电前，对盘、柜内剩余空气按启动按钮自动换气。换气结束自动维持正压值250Pa±100Pa,此时可向盘、柜内仪表、电器供电
b)盘、柜内工作正压值为250Pa±100Pa
c)内部正压值＜150Pa时，自动补气
d)内部正压值＜80Pa时，自动声光报警
e)内部正压值＜50Pa时，自动切断电源（2区危险场所使用时，需此功能请注明）
  
   
1.Ex-marking:Expdem II BT4 Expdem II CT6 2.Degree of protection:IP54(to IP56)
3.Power supply in auxiliary panel (cabinet or box):220V±10%, 50-60HZ 10A
4. Input air source:0.4-0.8MPa,etc.protective gas such as purged air or nitrogen
5.Air input size:G1/2 6.Air purging capacity:10-20m3/h
7.Air purging time:10-30 min(determined by test station,Tp=5×V/Q, Tp:air purging time V:net volume of main compartment Q:capacity of protective gas)
8.Consumed gas:2-8m3/h(determined by volume of panel or cabinet,number of operating parts, and sealing condition)
9.Function indexes:
a)Before meter or apparatus are energized,operate the push button to purge,at the end of air puring,maintain overpressure of 250±100Pa,then automatically supply power to meter or apparatas in panel or cabinet.
b)Overpressure value in the board (Cabinet)250± 100Pa
c)Overpressure value in the board(Cabinet)＜150Pa,automatically supply air
d)Overpressure value in the board(Cabinet)＜80Pa,automatic alarming with sound and light
e)Overpressure value in the board (Cabinet)＜50Pa,automatically disconnect power (Please refer when it used for zone 2)		  
   
表1(Table 1)  
结构形式
说明
221
后开门Door opened in rear
222
前开门Door opened in front
223
前、后开门Door opened in front and rear
121
左、后开门Door opened in left and rear
211
右、后开门Door opened in right and rear
122
左、前开门Door opened in left and front
212
右、前开门Door opened in right and front
 
   
外形尺寸及示意图 Outline dimensions  
H
B
D
观察窗尺寸
1800
2000
2200
(2300)
600
800
(900)
1000
1200
600
800
(900)
1000
b=B-200
h:按要求配制
H
B
D
观察窗尺寸
1300
600
660
800
1000
1300
700
H
B
D
观察窗尺寸
1800
2000
2200
(2300)
600
800
(900)
1000
1200
600
800
(900)
1000
b=B-200
h:按要求配制