ELECTRICAL SAFETY EQUIPMENT AND PPE
PATL portable earths for 6–35 kV and high-voltage overhead lines (automatic and screw clamps)
Country: Spain · Model: PATL
The PATL series covers portable earths for de-energised 6–35 kV overhead lines with automatic clamps for wires of Ø 3–32 mm and screw kits for MV and HV lines with wires and tubes up to Ø 130 mm. The three phases are connected to each other and to earth at the work site, so the crew is protected from induced voltage of neighbouring lines and back-feed, and if the line is switched on by mistake the relay protection will trip. All kits comply with IEC 61230.
- Standard
- IEC 61230
- Automatic clamps (MV overhead lines)
- MC Ø 3–20 mm, MCL Ø 3–32 mm, PCA-25 Ø 6–25 mm; spring closing, removal with a hook
- 3- and 4-clamp versions
- PATL-MC-3/-4, PATL-MCL-3/-4, PATL-PCA25-3/-4
- Cables (automatic)
- Cu PVC: links 2 × 2.5 m 16–70 mm², drop lead 15 m 16–50 mm² on a reel
Technical specifications
| Standard | IEC 61230 |
|---|---|
| Automatic clamps (MV overhead lines) | MC Ø 3–20 mm, MCL Ø 3–32 mm, PCA-25 Ø 6–25 mm; spring closing, removal with a hook |
| 3- and 4-clamp versions | PATL-MC-3/-4, PATL-MCL-3/-4, PATL-PCA25-3/-4 |
| Cables (automatic) | Cu PVC: links 2 × 2.5 m 16–70 mm², drop lead 15 m 16–50 mm² on a reel |
| Screw clamps (MV/HV overhead lines) | PAV Ø 12–40 mm; TML Ø 10–70 mm; PA40-B (bayonet) Ø 36–130 mm |
| Light HV kits | PATL-AL-3/TML, PAT-AL-3/MPL with aluminium cables |
| Scope of supply | holder plate, telescopic stick 1.10/2.0 m, earth rod, TT-50 clamps, case or bags |
| Short-circuit current | per manufacturer's table depending on cable cross-section |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The automatic clamp is thrown onto the wire from below with an insulating stick, and the spring closes it by itself and presses it against the conductor. The clamps are mounted on a common holder plate, so they are hung at the same time. The MC clamps are made for wires of Ø 3–20 mm, and the PCA-25 of aluminium alloy with mechanically locked closing for Ø 6–25 mm. The automatic kit includes two copper links of 2.5 m each, a 15 m drop lead on a metal reel, an earth rod and a plastic case, which is supplied on wheels to order. Screw clamps are tightened with a stick. Each screw kit contains three clamps, three copper cables in PVC insulation, three TT-50 clamps for connecting to earth and storage bags. The GA-TML working hook for them is ordered separately.
How to choose
For 6–35 kV distribution overhead lines the automatic PATL-MC, PATL-MCL or PATL-PCA25 with three or four clamps are used, and on lines with thicker wires the screw PATL-PAV for Ø 12–40 mm, PATL-TML for Ø 10–70 mm or PATL-PA40 with PA40-B bayonet clamps for wires and tubes of Ø 36–130 mm. The cross-section and length of the cables of screw kits are chosen by the required short-circuit current. When weight matters, there are light HV kits PATL-AL-3/TML and PAT-AL-3/MPL with aluminium cables that keep electrical continuity.
Request a price and lead time
PATL portable earths for 6–35 kV and high-voltage overhead lines (automatic and screw clamps). We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How is an automatic PATL clamp removed from the wire?
The clamp is removed with a hook on an insulating stick. It closes by itself under the action of a spring, which also creates the pressure on the conductor.
What is the length of the telescopic stick in the automatic PATL kit?
Collapsed, the stick is 1.10 m, extended 2 m. It is used to throw the clamps onto the wire from below.
What cross-section do the links and the drop lead of the PATL-MCL have?
The links have a cross-section of 16–70 mm² and the drop lead 16–50 mm². The MCL clamps are made for wires of Ø 3–32 mm.
What is used to check absence of voltage on an overhead line before applying PATL?
For lines up to 66 kV the electronic VTE detectors for 5–35 and 5–66 kV are suitable. The optical PEKE for 5–36 kV has a built-in telescopic stick and works without a battery.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.