MBS-E

Mechanical fuse screw joints
Documentation
Description
The MBS-E mechanical joint connectors are designed for the safe and reliable connection of copper and aluminium conductors in modern electricity generation, transformation and distribution systems.
The connection is made via mechanical clamping with stepless screws: the screws have no predetermined breaking point and ensure the optimal breaking torque is achieved, reducing installation errors and improving clamping quality.
The anti friction disc ensures reduced friction for greater contact force and prevents damage to the strands.
CEMBRE screws also maintain traceability after breakage (batch number marked on the screw base), simplifying maintenance and ensuring compliance with standards.
The central stop ensures correct conductor positioning, prevents oil leakage with oil impregnated conductors, and enables transitions from polymer to oil impregnated conductors.

They offer:
  • Easy installation: no crimping tools required — a hex socket spanner is sufficient.
  • Reduced installation errors: optimal breakaway torque guaranteed by stepless technology.
  • Versatility: one connector covers multiple conductor cross-sections.
  • Reliability and safety: high-performance electrical contact even in harsh conditions.
  • Guaranteed traceability: markings remain visible after screw breakage.
  • Safer installation: removable centering devices and protective caps eliminate sharp edges.
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Common features in table.

Features
Details by type in expandable section below.
  • Technical information
  • Material composition and treatments
  • Weight and dimensions
  • Logistic
  • Classification and data ordering
Minimum operating temperature
-50   °C
Maximum operating temperature
150   °C
Type of connector
butt blind connector
Central stop
Yes
Geometry of the clamping element
Hexagonal wrench
Surface treatment
tin plating
Grease inside the barrel
Yes
Number of clamping elements
4
Torque of the clamping element
40   Nm
Range of cable cross section
50 ÷ 240   mm²
Conductor body material
Alluminio con purezza superiore al 99,5%
Clamping element material
brass
Centering device material
Polyamide PA6
Spanner size
6   mm
Total length
124   mm
Inner diameter of the barrel
20   mm
Cable stripping length
68   mm
Outer diameter of barrel
34   mm
Unit in minimal packaging
1   PCE
Unit in standard packaging
6   PCE
Customs code
85369010

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