Gas-discharge protection device GRPZ-1U, GRPZ-1U(M): Used in the nodes of the contact network of electrified railways, provides protection of the fittings of the foundations and supports of the contact network from stray currents flowing through them, as well as for the passage of current into the rail circuit at breakdown of the insulation of the contact network or overhead longitudinal power supply lines, passing through the support of the contact network.
Breakdown voltage, V: 1300-1700,
Breakdown current amplitude, kA: up to 9;
Pulse duration, ms: 40;
Number of current closures (breakdowns) : 12
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