Steatite connection blocks 450V range Protected against accidental electric contact, stamped terminals, with double entries and double tightening, can be used as a very high temperature junction box

The BJ series differs from the BL series by its terminals, which are double input and double clamping. This configuration allows to independently clamp two conductors per input, while providing a significant economy of material.

Voltage

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Conductor cross-sections (mm²)

Max operating temperature (°C)

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Description

Main features: The BJ series differs from the BL series by its terminals, which are double input and double clamping. This configuration allows to independently clamp two conductors per input, while providing a significant economy of material.

They allow the simple connection of distribution cables for series-connected devices, such as lighting systems in road or rail tunnels, each terminal can at the same time ensure the continuity of the main line, and the diversion to one or two devices. Because of    their construction, they are non-flammable and resistant to temperature and humidity without losing their electrical and insulating characteristics. Depending on the materials used for the manufacture of the terminals, they can withstand more or less prolonged fire condtitions. This series includes versions with direct clamping or indirect clamping by screw on stainless steel pressure plate, more suitable for flexible and extra-flexible cables.

Ceramic: Steatite type C221, unglazed, slightly creamy color.

Typical insulation resistance between two terminals (500V measuring voltage):

  • at 20°C (70°F): 300 MΩ
  • at 100°C (212°F): 250 MΩ
  • at 200°C (390°F): 200 MΩ
  • at 300°C (570°F): 190 MΩ
  • at 400°C (750°F): 190 MΩ

The insulation values with respect to the earth are approximately 2 times greater. The EN 60998 standard imposes an insulation resistance greater than 5 MΩ. Their insulating characteristics are therefore about 20 to 40 times higher, including at 400°C (750°F).

Dielectric strength: higher than 4500V. Minimum insulation distance through ceramic between 2 terminals: 2mm

Maximum operating voltage: 450V, in pollution class 3.

Insulation distances: Greater than 4mm between mounting face and terminals, between terminals, and between two connection blocks mounted side by side.

Live parts: Protected against accidental electrical contact (Standard Finger Type A according to IEC 61032).

Mounting: they have one or two holes for installing them with a f screw on a wall or a board. A hexagonal recess makes it possible to place a round-headed or hexagonal-headed screw, or a nut. This allows mounting with clamping by the front or the back.

Applicable standards: (IEC) EN 60998-1; (IEC) EN 60998-2-1.

 

Section possible des conducteurs:

 

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Technical informations associated to this product

  • Historical introduction of ceramics used in connection blocks

    Hard Porcelain, originated from China, whose manufacturing process has been closely guarded for centuries, owes its characteristics of whiteness, fineness, resistance to temperature, and hardness to the use of two particular minerals, kaolin, ("Gao Ling Tu 高 岭 土 " in Chinese, which can be translated as "Clay of Gao Ling City", located north-east of Jingdezhen in Jiang Xi Province), and "Pu Tong Ci 普 通 瓷 " (translation: common ceramic).
  • Technical introduction of connection blocks made in ceramic and polyamide

    Ceramic was the first insulating material used in the electrical connection terminals. Mechanically resistant, exceptionally fire resistant, excellent electrical insulator, it had all the qualifications. Produced from locally available raw materials, ceramic and porcelain glazed electro-technical parts were essential in the beginnings of electricity until the appearance of Bakelite in the 1930s, then of engineered thermoplastics to 1960.
  • Main properties of brass

    According to the Directive 2011/65/ dated June 8, 2011 (Rohs), copper alloys are allowed to have a maximum of 4% by weight of lead as an alloying element. (Provisions of Article 4 and paragraph 1 of Annex II, limit value set by 6c of Annex III)
  • Main properties of usual stainless steels

    According to the Directive 2011/65/ dated June 8, 2011 (Rohs), stainless steel alloys are allowed to have a maximum of 0.1% by weight of lead, lead, mercury, hexavalent chromium, PBB (Polybrominated biphenyls), PBDE (Polybrominated Diphenyl Ethers) and 0.01% of Cadmium in weight.