UP 500 - thyristor surge protection system


UP 500 is connected in parallel with the terminals of the protected gland. When the terminal voltage exceeds 5000 V, the system activates a device that discharges the energy stored in the magnetic field of the gland.


Thyristor surge protection system UP 500 is built of an electronic system releasing BUZ and connected in series: thyristor power, set of LEDs and the damping resistor.

Technical data:

Activation voltage  500 V
Resistance to current surge 8000 V

Rated insulation voltage:

the main circuit

auxiliary circuit


4000 V

500 V

Insulation test voltage:

between the main circuit and the metal base

between the main circuit and auxiliary circuit

between the main circuit and the metal base


18,5 kV, 50 Hz/1 min

18,5 kV, 50 Hz/1 min

500 V, 50 Hz/1 min

Level of protection IP 00
Ambient temperature +5 °C + 40 °C
Operation position vertical
Weight 22 kg 

All technical data presented in the catalog can be changed due to technological progress.


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