Siemens Reyrolle 7PG2111 Solkor Relay

Product Description

Description:

The 7PG21 is a three phase unit differential protection used to detect in zone phase and earth faults. The relay is applied to overhead line and underground cable circuits as well as shorter circuits such as inter connectors.

• Relays (and associated CTs) are installed at each end of the protected circuit and connected together with dedicated metallic pilot wires.
• This established protection system provides a simple, robust protection of proven performance facilitating straightforward installation, commissioning and maintenance.
• Relays have 3 current inputs and are housed in E6 cases.

• Increased insulation level
• Pilot Wire Supervision to monitor the integrity of the pilot circuit.
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Function: 

• Current differential protection over a single pair of pilot wires

• Optional pilot wire supervision
• Optional overcurrent guard (check)

• Optional unstabilising / inter tripping