Power gas discharge tube (GDT) P600G


outdoor and indoor use

P600G -a power gas discharge tube (GDT) designed for potential equalisation on the installation components of buildings or technological units, which are not electrically connected to each other (according to EN 62305: 2011). It is recommended primarily for bridging of insulated flanges and insulated threaded joints in the pipeline cathodic protected parts of industrial technology. If between these parts arise some potential difference greater than 600V, GDT immediatelly ignites for a temporary period and both parth electrically interconnects (typical internal resistance initialized P600G is 0,001 ÷ 0,002 Ω). P600G installation can be done both inside and outside buildings, in damp and underground spaces. P600G functional part is made using a special gas dischage tube with shortened response time 20 nsec, designed for lightning current 100 kA (10/350). On the outer insulating cover is used a blue silicone rubber, which is hydrophobic and has excellent resistance against weathering, pollution and UV rays. Mounting bracket, connecting bolts and nuts are made from stainless steel, suitable for connection of conductors with cross section 16-50 mm2 Fe (Cu). The product is delivered with an integrated bracket, allowing direct mounting of P600G to the protected metal structure (pillar, wall or flange).

Type P600G
Classification acc. EN 61643‑11 a IEC 61643‑11 Type 1
DC sparkover voltage UVDC 600 V ÷ 1000 V
Max. continuous operating voltage 50 Hz Uc 255 Vrms
Nominal discharge current (8/20) In 100 kA
Impulse current (10/350) Iimp 100 kA
‑ charge Q 50 Asec
‑ specific energy W/R 2500 kJ/Ω
Follow current interrupting rating at Uc Ifi 100 Arms
Protection level at at Iimp 1) Up < 1 kV
DC discharge current, 1 operation 400 A/0,5 sec
AC discharge current at 1200 Vrms (TOV) 2), 1 operation 300 Arms/0,2 sec
Response time 1) tA < 20 ns
Insulation resistance at 100 VDC Riso > 1 GΩ
Protection type IP65
Operating temperature range ‑ 40 °C ÷ +   90 °C
Total height including mounting bracket h 187 mm
Weight m c. 700 g
Encapsulation silicon rubber
Article number 50802
1) Typical value
2) TOV – Temporary overvoltage


1) Product P600G is maintenance-free, has very little reaction time (20nsec), high insulation resistance (>1GΩ) and high protective ability. Next is this product resistant against to harsh treatment, acid rain and mechanical damage.

2) To perform diagnostics it is recommended to use measuring instrument G-TESTER (supplier ACER VOLTAGE s. r. o.). This device allows to control the one hand, the DC spark over voltage of the built GDT, then the value of the insulation resistance Risol (from 25VDC up to 1000VDC).