This standard specifies the requirements, test methods, inspection rules, marking, operating instructions, packaging, transportation and storage of indoor and outdoor explosion-proof and corrosion-proof low-voltage apparatus (hereinafter referred to as apparatus).
This standard is applicable to apparatus used in indoor and outdoor explosive hazardous locations with explosive gas mixture and corrosive medium.
This standard is not applicable to apparatus used in explosive hazardous locations with explosive dust.
2 Normative references
The following standards contain provision which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions cited are valid. All normative documents are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
GB 3836.1-1983 Electrical apparatus for explosive atmospheres - General requirements
GB 3836.2-1983 Electrical apparatus for explosive atmospheres - Flameproof electrical apparatus d
GB 3836.3-1983 Electrical apparatus for explosive atmospheres - Increased safety electrical apparatus e
GB 3836.4-1983 Electrical apparatus for explosive atmospheres - Intrinsically safe circuits and electrical apparatus i
GB 3836.5-1987 Electrical apparatus for explosive atmospheres - Pressurized electrical apparatus p
GB 3836.6-1987 Electrical apparatus for explosive atmospheres - Oil immersed electrical apparatus o
GB 3836.7-1987 Electrical apparatus for explosive atmospheres - Sand filled electrical apparatus q
GB 3836.8-1987 Electrical apparatus for explosive atmospheres - Non-sparking electrical apparatus n
GB 3836.9-1990 Electrical apparatus for explosive atmospheres - Encapsulated electrical apparatus m
GB 3836.10-1991 Electrical apparatus for explosive atmospheres - Hermetically sealed electrical apparatus h
GB/T 4942.2-1993 Degrees of protection provided by enclosures for low-voltage apparatus (eqv IEC 60947-1: 1988)
GB 9969.1-1998 General principles for preparation of instructions for use of industrial products
GB/T 14048.1-1993 General rules for low-voltage switchgear and controlgear (eqv IEC 60947-1: 1988)
JB/T 834-1999 Environmental technical requirements of low-voltage appliance for tropical use
JB 4324-1986 Test method for chemical gas corrosion of electric products
JB/T 4375-1999 Environmental conditions required by electric products used in outdoor and indoor corrosive locations
3 Symbols
F1 indoor moderate corrosion prevention;
F2 indoor strong corrosion prevention;
W outdoor slight corrosion prevention;
WF1 outdoor moderate corrosion prevention;
WF2 outdoor strong corrosion prevention;
K climate conditions;
C chemically active substance condition;
S mechanically active substance condition;
4 Product classification
The apparatuses are classified into:
a) indoor explosion-proof and moderately corrosion-proof type;
b) indoor explosion-proof and strongly corrosion-proof type;
c) outdoor explosion-proof and slightly corrosion-proof type;
d) outdoor explosion-proof and moderately corrosion-proof type;
e) outdoor explosion-proof and strongly corrosion-proof type.
