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Siemens Reyrolle 7SR158 Voltage & Frequency Protection Relay

Siemens Reyrolle 7PG23 High Impedance Protection Relay

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Technical Specifications

Model: 7SR158 Argus – 3xV

Protection Functions:

• Under/Over Voltage (27/59)

• Under/Over Frequency (81)

• Rate of Change of Frequency (81R)

• Negative Phase Sequence Voltage

• Neutral Voltage Displacement

• Voltage Vector Shift (78)

Supervision Functions:

• Trip and Close Circuit Supervision

• Lockout

Monitoring Functions:

• Primary/Secondary Line & Phase Voltages

• Historical Demand Record

• PPS, NPS & ZPS Voltage

Additional Features:

• Four Setting Groups

• Two-Level Password Protection

• Self-Monitoring

• Fault, Event & Waveform Records

• Programmable Logic & Virtual I/O

• Front USB & Rear RS485 Communication (MODBUS RTU / IEC 60870-5-103 / DNP 3.0)

• Size: E4 case (3 voltage inputs, 6 binary inputs, 8 binary outputs)

Type: High Impedance Differential Protection Relay

Brand: Siemens Reyrolle

Model: 7PG23

Operating Principle: Voltage-operated high impedance protection

Applications: Transformer restricted earth fault protection, reactor and stator winding fault detection

Features:

Sensitive, fast fault detection for internal earth faults

High stability during external faults

User-selectable operating voltage setting

Integral non-linear voltage limiting resistor

Optional external shunt resistor for higher operating current

Operation flag indicator for clear fault identification

Compatible with Reyrolle High Impedance Software Tool for easy setting calculations

Mounted in E3 size case

Protection Functions: High impedance restricted earth fault (REF) protection

Accessories: Stabilizing resistors, setting resistors, nonlinear voltage limiting resistors (optional)

Compliance: IEC Standards

Software Support: Reyrolle High Impedance Software Tool (free download)

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