Safe and reliable: UL explosion-proof control cabinet for hazardous environments

PX UL explosion-proof control cabinet:

The positive pressure protection reduces the danger classification of the positive pressure housing from Zone 1 to non-hazardous or from Class 1 (dangerous zone in coal mine) to non-hazardous. The product adopts automatic control is convenient and reliable;

The product has three forms of box type, cabinet type and piano type, using stainless steel material 304 or 316L;

Cabinet products are made of high quality steel plate bent and welded, the main and auxiliary plates are left and right structure, cable socket installation, down line, front door operation, rear door maintenance;

Box-type products are made of high quality steel plate welding structure, the main and auxiliary plates are upper and lower structures, hanging installation, down line, front door operation and maintenance, and can be specially designed according to user requirements;

The volume of positive pressure chamber of box-type products is relatively small, suitable for centralized control, instrument analysis, programmable controller, single board industrial computer, micro processing control system;

According to user requirements can be used as a large equipment supporting electric control box, with the overall installation of equipment, supporting use; The user chooses the appropriate box size according to the number of internal electrical components;

Piano products are made of high-quality steel plate folding and welding molding, the main and auxiliary disks are front and back structure, seat installation, down line, piano operation, rear door maintenance;

The components installed in the positive pressure inner cavity of the piano products are mainly field control components, analysis instruments, centralized control, signal liaison, to achieve continuous field operation and monitoring. The computer can be installed according to the user; Cabinet type and piano type product rear door adopts quick opening device, convenient installation and maintenance;

Product summary:

The product is set up with ventilation chain. Before the product is put into operation, only after the main disc cavity is ventilated and the specified time and volume of ventilation are reached, the secondary disc can be powered only after the flammable and explosive gas is blown inside the main disc.

And began to detect the main chamber pressure to ensure that the electrical components have been effectively isolated by clean media when the product is put into operation.

Only when the pressure in the main disk chamber meets the specified pressure requirements, the automatic power switching system in the secondary disk will send power to the main chamber. The working pressure in the inner chamber of the main disk is 100Pa < P < 800Pa;

When the air pressure is high, the automatic control system automatically closes the intake or opens the exhaust valve, and automatically adjusts the internal air pressure to ensure that the product is not deformed and damaged by the impact of high air pressure. When the pressure is below 100Pa,

Automatic control system automatic alarm (sound and light), and open the air intake automatically adjust the internal air replenishes successfully, the automatic return to normal, unsuccessful and internal pressure drops to 60Pa, if necessary can set the system automatic power off.

The auxiliary disk automatic control system is continuously monitored and displays the pressure parameters in the main disk cavity.

The same type of product can be multiple parallel operation,

When the user provides the air source, it must be equipped with clean or inert gas gas, the source is generally, the user's on-site instrument air source can meet the requirements. The air source pressure is 0.2-0.8MPa.

For installation in general environment industrial control cabinets with Intrinsically Safe Circuit Extension into Hazardous Locations, according to the US Electrical Code NFPA 70, The classification according to the relevant hazardous environment level is as follows:

* Class I, Division 1

* Class I, Zone 0 and Zone 1 (AEx)

* Class II, Division 1

* Class III, Division 1

* Zone 20 and Zone 21 (AEx)

Industrial control cabinets connected to hazardous environments require the use of UL listed safety grids to further ensure that the extended circuit is intrinsically safe protection, and as required, each control cabinet requires separate control drawings, mainly to ensure that the equipment can be correctly connected and installed at the site where it is intended to be used.

Technical parameter

Implementation standards: GB3836.1, GB3836.2, GB3836.3, GB3836.4, GB 3836.5, GB12476.1, GB12476.4, GB12476.5, GB12476.7 IEC60079-0, IEC60079-1, IEC60079-2, IEC60079-7, IEC60079-11, IEC61241-0, IEC61241-1

EN60079-0, EN60079-1, EN60079-2, EN60079-7, EN60079-11, EN61241-0, EN61241-1

Explosion-proof mark: Ex d ib pz a C T4 Ge/Ex ID A21 IP66 T130"C, Ex pz a C T4 Ge/Ex tD A21 IP66 T130"C Ex de ib px a B T4 Gb, Ex de ib px a C T4 Gb/Ex pD ID A21 IP65 T130-C

Ex de px a C T4 Gb/Ex pD tDA21 IP65 T130"C

Protection level: IP65 /IP66

Working pressure: 60-BOOPa

Air source pressure: 0.2-0.BMPa

Global market access solutions for control system products to meet the needs of the UL mark in the North American market and the global market certification.

We can provide global market access solutions to meet the UL mark for control system products and auxiliary electrical safety products in the North American market and other certification needs for the global market. Our global network of experts and engineers can assist you in understanding the national and global requirements for specific market applications. A one-stop certification process helps you get your products to market faster. With a proven global certification program, this streamlined and accelerated process can save you not only time, but also money.

UL is an American insurance laboratory whose explosion-proof certifications are primarily UL Class I and UL Class II for North America. The use and installation of electrical equipment products in hazardous environments shall comply with the requirements of Section 500-506 of the National Electrical Code (NEC®); At the same time, an Authority Having Jurisdiction (AHJ) will be present to conduct an audit. UL is widely recognized in North America to provide assessment and testing services for both common and hazardous sites.