TTG / TTGA / MTG / MTSA bolted lugs and sleeves with shear heads, 16–630 mm²
Country: Spain · Model: TTG / TTGA / MTG / MTSA
The bolted lugs TTG, TTGA and the sleeves MTG, MTSA join aluminium and copper conductors of 16–630 mm² cross-section without a crimping tool. The bolt heads shear off at the design torque and remain flush with the body. They are used in 0.4 kV networks, in transformer substations and in distribution cabinets.
- Material
- cast high-conductivity aluminium ≥ 99.5 %
- Coating
- tinning 15–20 µm
- TTG cross-section
- 16–630 mm²
- TTGA cross-section
- 16–400 mm²
Technical specifications
| Material | cast high-conductivity aluminium ≥ 99.5 % |
|---|---|
| Coating | tinning 15–20 µm |
| TTG cross-section | 16–630 mm² |
| TTGA cross-section | 16–400 mm² |
| MTSA cross-section | 25–240 mm² (0.6/1 kV) |
| Conductor fixing | shear bolts M12/M17/M22 with calibrated torque |
| TTGA, MTSA insulation | insulating cover, colour phase marking (TTGA), seals (MTSA) |
| Standards | UNE 211024-3, IEC 61238-1 (TTG); UNE 211022 (TTGA, MTSA); AENOR mark |
| Versions | TTG, TTG2, TTGA, BTF, MTG, MTG/R, MTSA, MBPT-95/50 |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The conductor is inserted into the body and clamped with M12, M17 or M22 bolts, and the shear torque corresponds to the cross-section, so the clamping force is the same for different crews. The bodies are cast from aluminium with a purity of at least 99.5 % and coated with 15–20 µm of tin. The TTG lug for 16–630 mm² complies with UNE 211024-3 and IEC 61238-1 and carries the AENOR mark, and TTG2 has the same purpose per UNE 211024-3. TTGA is insulated, per UNE 211022, for 16–400 mm², with a cover and rings for phases (black, brown, grey) and neutral (blue). BTF is bimetallic. The sleeves MTG and the reducing MTG/R join conductors of the same or different cross-sections. MTSA is pre-insulated, for 25–240 mm² and 0.6/1 kV, has seals at the ends, complies with UNE 211022 and is AENOR certified, and according to the manufacturer it is recommended primarily for underground low-voltage networks. MBPT-95/50 joins a 95 mm² aluminium conductor to a 50 mm² solid aluminium or copper one.
How to choose
The type is chosen by purpose. For termination without insulation, TTG is suitable; for an insulated version with phase marking, TTGA up to 400 mm²; and for an underground 0.6/1 kV line, MTSA. The sleeves MTG join conductors, and the reducing MTG/R join conductors of different cross-sections. If crimping of copper conductors is needed, look at the tinned copper T and TL for 1.5–630 mm².
Request a price and lead time
TTG / TTGA / MTG / MTSA bolted lugs and sleeves with shear heads, 16–630 mm². We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Why use bolts with a shear head?
The head shears off at the design torque that corresponds to the conductor cross-section and remains flush with the wall of the body. The contact pressure is the same for different crews.
What cross-sections do TTG, TTGA and MTSA have?
TTG 16–630 mm², TTGA 16–400 mm², MTSA 25–240 mm² at 0.6/1 kV.
What coating do the bodies have?
Cast aluminium with a purity of at least 99.5 % with 15–20 µm tinning.
What is MBPT-95/50 intended for?
It is a bimetallic earthing connector for a 95 mm² aluminium conductor with a 50 mm² solid aluminium or copper one.
What bolts fix the conductor?
Shear bolts M12, M17 or M22 with a calibrated tightening torque.
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