TOC-1 transformer clamp – horizontal, M12 / M20 / M30
Conformity confirmed by certificate
TOC-1 M12 clamps in the /U and /N versions, together with the OZNN insulating cover, hold Certificate of Conformity No. Z/12/004/26. It was issued by SEP – Quality Testing Office (BBJ), a certification body accredited by PCA (No. AC 012), on the basis of product tests.
Three moves and it is fitted
Screw onto the stud
The internal M12/M20/M30 thread goes straight onto the LV bushing stud – no adapter, no cable lugs.
Lock with two screws
A2 stainless steel screws clamp the slotted body onto the stud. The joint does not work loose under vibration or load cycling.
Insert and tighten the conductors
Two main sockets 95–300 mm² and two auxiliary 2.5–50 mm² (metering, substation lighting, surge arrester). Clamped by brass screws.
Which TOC-1 for your transformer
| Catalogue no. | Version | Stud thread | I max | Transformer rating |
|---|---|---|---|---|
| DP 5100 | TOC-1/U | M12 | 250 A | ≤ 160 kVA |
| DP 5200 | TOC-1/U | M20 | 630 A | 250 / 400 kVA |
| DP 5300 | TOC-1/U | M30 | 1000 A | 630 kVA |
| DP 5100N | TOC-1/N with earthing | M12 | 250 A | ≤ 160 kVA |
| DP 5200N | TOC-1/N with earthing | M20 | 630 A | 250 / 400 kVA |
| DP 5300N | TOC-1/N with earthing | M30 | 1000 A | 630 kVA |
Set per transformer: 4 pcs – 3 × /U for the phases, 1 × /N for the neutral. Weight approx. 1.0 kg each. The thread is matched to the LV bushing stud – tell us the rating or transformer type and we do the rest. How to choose a clamp – guide →
Completing the set
TOC-1/U
Phase version: horizontal outlet, 2 main + 2 auxiliary sockets.
TOC-1/N
Version with an extra stud for the neutral or earthing conductor.
OZNN cover
Insulating cover for the clamp – protection against touch, birds and rodents.
A clamp from the transformer maker
Transformer + accessories
We match the clamps to our MarkoEco2 transformers; they fit any LV bushing with an M12–M30 stud.
Forged, not cast
Forged tin-plated brass, A2 screws. Compliant with EN 60947-7-1.
A safer substation
The OZNN cover slips over the clamp – no more bird-caused short circuits.
From stock in Poland
Clamps and covers ship from our warehouse – separately or together with the transformer.
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