Portable grounding device ZPMZ for grounding power lines 110-1150 kV from cross-arm with lengthening metal parts

Grounding device ZPMZ is intended for worker’s protection from electric shock on the disconnecting parts of high voltage lines in the case of mistaken voltage feed to this part or appearance of induced voltage.

The main parameters of grounding device:

Name of parameter
Marking of grounding device
ZPMZ-110-
220
ZPMZ-330-
500
ZPMZ-750
ZPMZ-1150
Nominal voltage of electrical installations, kV
110-220
330-500
750
1150
Length of insulating parts of the rods, m, not less
0,5
1,0
1,0
1,0
Length of handle, m, not less
0,9
1,0
1,0
1,0
Number of metallic parts
2
2
4
5
General number of parts
3
3
5
6
General length of the rod in mounted position, m
4,4
6,0
8,1
10,0
Length in transporting position, m
1,7
2,25
2,25
2,2
Section of grounding conductor, mm2
25
25
25
25
Length of insulating escapement, m, not less
4
4
4
4
Current of thermal ability during 3 sec., kA
4
4
4
4
Length of insulating supporting rope, m
10
10
12
Length of fixing rope, m
1,0
1,0
1,0
1,0
Mass, kg, not more
3,9
4,5
6,1
6,9

Portable grounding device ZPMZ ensure reliable and quick grounding of phase conductors of high voltage lines by means of special bayonet spring clamp, which fulfils mounting and dismounting of grounding device by movement “on yourself”.
Grounding device consists of bayonet clamp for fixing on the power line’s phase conductor, metallic current conductive parts, insulating rod from fiberglass plastic with handle, grounding conductor and clamp for connecting to grounded element of power line.
Flexible grounding conductor is manufactured from copper cores and coated with transparent polymer sheath. Conductor’s ends are pressed in special cable lugs. In connecting placed there are sheathes from polymer material or representing springs from flexible steel wire for protection conductor from break.
The complete set of supply includes the case for transportation and storage of grounding device in closed position.