Explosion-proof electrical equipment (or Ex-equipment) is an electrical product or device that provides constructive measures to eliminate or maximize the possibility of ignition of the environment due to the operation of this equipment.

Depending on the application , explosion - proof electrical equipment is divided into 2 groups:

1. Group I. Mine explosion-proof product (device, electrical equipment) – special-purpose electrical equipment intended for mines, mines, quarries and mining and processing enterprises.

2. Group II. Explosion-proof electrical equipment for indoor and outdoor installations intended for potentially explosive environments, except for underground mine workings and mines.

The purpose of explosion-proof equipment, in addition to its main functional purpose, is to prevent the possibility of contact of internal spark-forming or heat-generating elements of the equipment with an external explosive environment, or to prevent the explosion that occurred inside the outer shell of the equipment from escaping by localizing it:

• localization, or containment of an explosion - preventing the spread of an explosion outside the shell;
• insulation, or sealing - filling with compound, varnish, maintaining high pressure inside the shell by purging equipment with compressed air or inert gas;
• filling the shell with quartz sand, immersion of equipment in oil, used, for example, for transformer windings;
• prevention or limitation of electrical and thermal energy released is the use of an "intrinsically safe electrical circuit" in the protection method.

• Scheme 1c - certification of mass-produced equipment based on testing of a standard sample in an accredited testing laboratory (center) and analysis of the state of production with subsequent inspection control.
• Scheme 3c - certification of a batch of equipment based on testing samples of equipment from this batch in an accredited testing laboratory (center).
• Scheme 4c - certification of equipment units based on testing of a unit of equipment in an accredited testing laboratory.

• OKP code.
• Product name.
• Specifying the certification scheme.
• The name of the manufacturer and recipient of the certificate.
• Technical conditions according to which Ex-equipment is manufactured, reflecting the requirements for ensuring explosion protection.
• Operational documents containing a technical description, information on maintenance, installation and safe operation of Ex-equipment, indicating the means of explosion protection used, documentation for general-purpose assembly units (if possible).
• HS code.
• Product name.
• Specifying the certification scheme.
• The name of the manufacturer (country) and the recipient of the certificate.
• Foreign certificates (ATEX), standards according to which Ex-equipment is manufactured, reflecting the requirements for ensuring explosion protection.
• Operational documents containing a technical description, information on maintenance, installation and safe operation of Ex-equipment, indicating the means of explosion protection used, documentation for general-purpose assembly units (if possible).

To get a free consultation on the registration of the Ex explosion protection certificate, please contact the specialists of the EAC Standardization Center at the phone numbers or e-mail listed on the website. You can also order a callback or send an online application to receive the necessary certification service.

Consider the marking of explosion protection of certain equipment, for example: Battery head explosion-proof lamp SGV-2 for petrochemistry with the type of explosion protection 1ExdIIBT5X.

According to GOST R, the type of explosion protection has:

A) 1 - the sign of the level of explosion protection;

B) Ex - sign of compliance with explosion protection standards;

C) d - sign of the type of explosion protection;

D) IIB - the sign of the subgroup (category of the mixture);

E) T5 - sign of the temperature class (mixture group);

F) X is a sign of a special type of explosion protection.

Item A:

The levels of explosion protection of electrical equipment in the Russian classification have the designations 2, 1 and 0 (in ascending order):

Level 2 - electrical equipment of increased reliability against explosion: explosion protection is provided in it only in normal operation;

Level 1 - explosion-proof electrical equipment: explosion protection is provided both under normal operating conditions and in case of possible damage depending on the operating conditions, except for damage to means providing explosion protection;

Level 0 — especially explosion-proof equipment in which special measures and means of protection against explosion are applied.

The degree of explosion protection of equipment (2, 1 or 0) is put in the Russian Federation as the first digit before the European marking of explosion protection of equipment.

Item B:

Ex is a sign confirming that the equipment complies with explosion protection standards (according to the CENELEC standard).

Point С:

The European classification provides details of the type of explosion protection used in the equipment :

• d - explosion-proof shell;
• e - increased security;
• p - filling or purging;
• i - intrinsically safe electrical circuit (ia, ib, ic - explosive zone 2; ia, ib - explosive zone 1; ia - explosive zone 0);
• o - oil filling of the shell;
• q - quartz filling of the shell;
• m - sealing compound;
• n - no sparking;
• s - special protection;
• h — hermetic insulation.

Item D:

The existing classification of the explosive hazard of the mixture provides for two categories: I and II.

Category I defines the requirements for equipment designed to work in mines and mines, we do not consider it;

Category II includes equipment used to work in conditions of possible formation of industrial explosive mixtures of gases and suspensions.

There are three subcategories of category II: IIA, IIB, IIC. Each subsequent category includes (can replace) the preceding one, that is, subcategory C is the highest and meets the requirements of all categories - A, B and C. It is thus the most "strict".

Item E:

The explosion hazard categories of the mixture are detailed depending on the self-ignition temperature of explosive gases and mixtures.

According to GOST, the following classification by ignition temperature applies:

T1 — more than 450 oS;

T2 - from 300 oS to 450 oS;

T3 — from 200 oS to 300 oS;

T4 - from 135 oS to 200 oS;

T5 — from 100 oS to 135 oS;

T6 — from 85 oS to 100 oS.

Item F:

A special type of explosion protection X is provided by the following:

1. to prevent the possibility of spark discharges, the battery case must be in a cotton cloth bag for the entire period of operation;

2. the outer surface of the headlight housing must be wiped with a clean cloth moistened with an antistatic liquid before use.

Our specialists carry out a full range of work on the certification of explosion-proof equipment. Here you can issue mandatory certificates, register declarations of conformity of products.

We work efficiently, saving you time and money. Each client is serviced by a personal manager who will determine the necessary certificates and calculate their cost completely free of charge. Our specialists will answer all the questions that arise, tell you what kind of document you need to issue in your case, and will qualitatively certify the required equipment.