MR VACUTAP VR-Ex, Инструкции по установке и вводу в эксплуатацию

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2 Safety
Maschinenfabrik Reinhausen GmbH 2020 16 7545652/00 EN VACUTAP
®
VR-Ex
Explosion group (number 6)
EN/IEC Gases, vapors (examples) Min. ignition energy
(mJ)
IIA Ammonia -
IIA Acetic acid, acetone, benzene, diesel,
ethane, ether, fuel oil, hexane, meth-
ane, petrol, petroleum, propane 0.18
IIB Ethylene, isoprene, town gas 0.06
IIC Acetylene, carbon disulfide, hydrogen 0.02
Table 7: Explosion groups
Temperature classes (number 7)
Temperature
class Maximum equipment surface tem-
perature Ignition temperature of
the flammable sub-
stances
T1 450°C > 450°C
T2 300°C > 300°C < 450°C
T3 200°C > 200°C < 300°C
T4 135°C > 135°C < 200°C
T5 100°C > 100°C < 135°C
T6 85°C > 85°C < 100°C
Table 8: Temperature classes
Equipment protection level (EPL) (number 8)
The EPL indicates the level of protection defined for a device based on the
level of probability of ignition and taking into account the differences be-
tween potentially explosive gas atmospheres, potentially explosive dust at-
mospheres, and potentially explosive atmospheres in mine workings af-
fected by firedamp.
2.4.2 Standards and regulations
The following standards and regulations apply to explosion-proof on-load
tap-changers:
▪ EN/IEC 60079-0: Equipment – General requirements
▪ EN/IEC 60079-6: Equipment protection by liquid immersion "o"
▪ EN/IEC 60079-7: Equipment protection by increased safety "e"