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KTC正壓防爆儀表、配電盤、柜、箱(IIB、IIC)
   
適用范圍
1、爆炸性氣體環(huán)境：1區(qū)、2區(qū)
2、場(chǎng)所中危險(xiǎn)氣體或蒸氣：IIA、IIB、IIC
3、溫度組別：T1～T4
4、環(huán)境溫度：-20℃～+40℃
5、戶內(nèi)、戶外)

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



   
型號(hào)含義 Type designation  
   
主要技術(shù)參數(shù)  
1、防爆標(biāo)志：Expdem II BT4 Expdem II CT6 2、防護(hù)等級(jí)IP54(可達(dá)IP56)
3、副（柜箱）內(nèi)供電220VAC±10% , 50-60HZ, 10A
4、輸入氣源：0.4-0.8MPa,凈化空氣或氮?dú)獾缺Ｗo(hù)氣體
5、進(jìn)氣口為：G1/2 6、換氣量為：10-20m3/h
7、換氣時(shí)間：10-30min(由防爆檢測(cè)單位確定，tp=5×V/Q, tp：換氣時(shí)間，V:主腔內(nèi)凈容量，Q:保護(hù)氣體的流量）
8、耗氣量為：2-8m3/h (根據(jù)盤、柜的容積和面板操作元件的多少及其密封程度而定）
9、功能指標(biāo)：
a)儀表、電器供電前，對(duì)盤、柜內(nèi)剩余空氣按啟動(dòng)按鈕自動(dòng)換氣。換氣結(jié)束自動(dòng)維持正壓值250Pa±100Pa,此時(shí)可向盤、柜內(nèi)儀表、電器供電
b)盤、柜內(nèi)工作正壓值為250Pa±100Pa
c)內(nèi)部正壓值＜150Pa時(shí)，自動(dòng)補(bǔ)氣
d)內(nèi)部正壓值＜80Pa時(shí)，自動(dòng)聲光報(bào)警
e)內(nèi)部正壓值＜50Pa時(shí)，自動(dòng)切斷電源（2區(qū)危險(xiǎn)場(chǎng)所使用時(shí)，需此功能請(qǐng)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)  
結(jié)構(gòu)形式
說明
221
后開門Door opened in rear
222
前開門Door opened in front
223
前、后開門Door opened in front and rear
121
左、后開門Door opened in left and rear
211
右、后開門Door opened in right and rear
122
左、前開門Door opened in left and front
212
右、前開門Door opened in right and front
 
   
外形尺寸及示意圖 Outline dimensions  
H
B
D
觀察窗尺寸
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
觀察窗尺寸
1300
600
660
800
1000
1300
700
H
B
D
觀察窗尺寸
1800
2000
2200
(2300)
600
800
(900)
1000
1200
600
800
(900)
1000
b=B-200
h:按要求配制