Kobold VKG, Руководство по эксплуатации

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VKG
Page 10 VKG K09/0322
Permitted use
• The intrinsically safe reed switch can be used as follows:
• In Zone 2 (Gas-Ex, EPL Gc) in explosion groups IIA, IIB and IIC
• In Zone 22 (Dust-Ex, EPL Dc) in explosion groups IIIA, IIIB and IIIC
• The requirements for simple electrical equipment for use in intrinsically safe
circuits in zones 1/21 are fulfilled.
• The qualification regarding the surface temperature is T4. For all gases, vapors,
mists with an ignition temperature> 135 ° C the equipment is not an ignition
source.
• In the dust Ex area, 125 ° C is the reference temperature for further
consideration regarding the safety distance from the smoldering temperature.
• The ambient temperature range is -20 ° C ≤ Ta ≤ 80 ° C.
2.1. Electrical characteristics for Ex i
Electrical data:
• Rated voltage up to 45 volt AC / DC
• Rated current up to 2 A
• Ui
IC
≤ 30 V AC / DC, Ii
IIC
≤ 250 mA
• Ui
IIB
≤ 45 V AC / DC, Ii
IB
≤ 2 A
• Ui
IIIC
≤ 45 V AC / DC, Ii
IIIC
≤ 250 mA
• L
i
= negligible, Ci = negligible
• Heating on the outer housing <15 K
2.2 Type code
The equipment is identified by the following type code:
Type Description Item-No. Remarks
41R57 A B Type coding
41R57 Contact device
A N/O contact (2 wires), Plug with black cap
Change-over contact (3 wires), Plug with grey
cap
B 70 – 75 with marking (not ex-relevant) 202.289 N/O
45 – 50 with marking 202.285 N/O
50 – 55 with marking 202.286 N/O
60 – 65 with marking 202.287 N/O
70 – 75 with marking 202.288 Change-over
60 – 65 change-over contact 202.290 Change-over
2.3 Temperature class
The reed switch is suitable for temperature class T4 / T125 ° C.