By operational completeness, the device belongs to second-order products. Isolation of live circuits of the device meets the requirements of GOST R 52931. The electrical insulation resistance of the current-carrying circuits of the device among themselves in accordance with GOST R 52931 is as follows: • 20 MΩ (under normal environmental conditions); • 5 MΩ (at the upper temperature value of the operating conditions); • 1 MΩ (at the upper value of the relative humidity of the operating conditions). 2.2 Operating conditions The device is designed for operation in the following conditions: • closed explosion-proof rooms without aggressive vapors and gases; • ambient temperature:
from -20 to +70 °С; • relative humidity: max. 95 % (at ≤35 °C, non-condensing); • atmospheric pressure: from 84 to 106.7 kPa. In terms of resistance to mechanical influences during operation the device corresponds to group of performance N2 in GOST R 52931. In terms of resistance to electromagnetic influences (interference resistant), the device corresponds to class A equipment according to GOST 51522. By the level of radiation of radio interference (interference emissions), the device corresponds to class B equipment according to GOST 30804.6.4. NOTICE Requirements in terms of external influencing factors are mandatory as related to safety requirements. 13