ELECTRICAL SAFETY EQUIPMENT AND PPE
Portable earths, clamps and earthing points for switchgear and medium- and high-voltage overhead lines (IEC 61230)
Country: Germany · Model: IEC 61230
Earthing and short-circuiting devices per IEC 61230 for switchgear and medium- and high-voltage overhead lines have cables of 25–150 mm² for short-circuit currents from 4.9 to 29.6 kA for 1 s. Versions from single-pole to five-pole, over 25 line and earthing clamps and earthing points per DIN 48088 are available.
- Standard
- IEC 61230
- Cable cross-section
- 25–150 mm²
- Short-circuit current (1 s)
- 4.9 / 6.9 / 9.9 / 13.8 / 18.7 / 23.7 / 29.6 kA
- Versions
- 1–5 poles; for MV-CONNEX sockets and connectors
Technical specifications
| Standard | IEC 61230 |
|---|---|
| Cable cross-section | 25–150 mm² |
| Short-circuit current (1 s) | 4.9 / 6.9 / 9.9 / 13.8 / 18.7 / 23.7 / 29.6 kA |
| Versions | 1–5 poles; for MV-CONNEX sockets and connectors |
| Cable insulation | PVC (transparent) or TPE (orange) |
| Earthing clamps | Ø 2–30 mm, 56 Nm, M12 bolt |
| Line clamps | Ø 2–85 mm, A2 stainless steel spindle |
| Earthing points | DIN 48088; ball pins 20 / 25 mm |
| Discharge sticks | insulating part 500 mm, Cu hook 120 mm |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
If a disconnected section ends up under voltage, the short circuit through the device prevents dangerous touch voltage from appearing. The cables have transparent PVC or orange TPE insulation, three-pole devices come with a reduced or full earth cable cross-section, and versions for MV-CONNEX sockets and connectors exist. Earthing clamps grip conductors of 2–30 mm, line clamps 2–85 mm, both types are connected with an M12 bolt, and the spindles of the line clamps are made of A2 stainless steel. Earthing and connection points have an external or internal thread, including ball pins of 20 and 25 mm, and for transformer bushings with 2DIREKT terminals there are pins for 23.7–29.6 kA. Multi-contact devices U2, F2B, A1 and A2 connect up to four single-pole devices to a tower or busbar, and there are designs for split phases. Discharge sticks with an insulating part of 500 mm and a copper hook of 120 mm remove induced and equalising voltages from high-voltage capacitors and electrostatic precipitators. The devices are designed to customer requirements, and the IT support of production shortens delivery times even for special variants.
How to choose
The configuration is determined by the connection points, the network short-circuit current, the length and cross-section of the cables and the clamps, where the short-circuit rating of cables and clamps must match, and in multi-pole devices all cables have the same cross-section. Absence of voltage before application is checked with KP-Test 5 detectors for 1–36 kV or KP-Test 5H+ for 30–420 kV AC. For LV panels there are separate three-pole sets with a 25 mm² cable.
Request a price and lead time
Portable earths, clamps and earthing points for switchgear and medium- and high-voltage overhead lines (IEC 61230). We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What earth cable cross-section is needed for a short-circuit current of 29.6 kA?
The range of cross-sections 25–150 mm² corresponds to currents of 4.9, 6.9, 9.9, 13.8, 18.7, 23.7 and 29.6 kA for 1 s, so the highest current requires 150 mm².
How long should a portable earth be between connection points?
The length of the device must be not less than 1.2 times the distance between connection points, but as short as possible, because during a short circuit the cables swing strongly.
What torque is used to tighten earthing points with M10, M12 and M16 threads?
Points with an M10 thread are tightened with a torque of 33 Nm, M12 with 56 Nm and M16 with 135 Nm.
Can an earth that has carried a short-circuit current be used again?
No, such a device is replaced together with its fixing points, as is a device with twisted lugs, damaged insulation or a worn piercing clamp.
Similar products
D-TUERI / D-WATCHD-TUERI / D-WATCH personal electric field alarms 1–400 kV
VTE / VTM / POWER LIGHT / VTO / PEKE / VTCVTE / VTM / POWER LIGHT / VTO / PEKE / VTC voltage detectors 1–79 kV AC and 0.5–5 kV DC
Orion 3.1 / M1 / compact, LRM-ST / HR-STOrion 3.1 / M1 / compact, LRM-ST / HR-ST portable voltage detectors and phase comparators for LRM/HR interfaces
Sirius / Comet / FL-ISirius / Comet / FL-I single-pole voltage detectors 6–30 kV per IEC 61243-1REQUEST
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.