The 7PG23 electro-mechanical single phase circulating current protection is used to detect earth faults in ‘high impedance’ protection schemes. The relay is typically applied used in transformer protection schemes.
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Home > Products Siemens > Substation Automation and Protection Product > Energy Automation and Smart Grid > Protection for Digital Substation > Reyrolle > Accessories > High impedance relay Reyrolle 7PG23
The 7PG23 electro-mechanical single phase circulating current protection is used to detect earth faults in ‘high impedance’ protection schemes. The relay is typically applied used in transformer protection schemes.
Features :
One relay per phase can be applied to detect both phase and earth faults e.g. on reactors and stator windings of large machines.
The relay is a voltage operating device and has a user selectable operate voltage setting. The relay can be used in conjunction with an external shunt setting resistor where a higher operating current is required. An integral non-linear resistor limits over-voltages occurring during system faults. Operation flag indicator. Relays are housed in size E3 cases.
Functions :
Protection functions
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