SIPROTEC 7SJ62 | Siemens Feeder Overcurrent Protection Relay

Product Overview

The Siemens SIPROTEC 7SJ62 is a multifunction numerical feeder protection relay for modern power systems.
It belongs to the SIPROTEC 4 family, widely deployed in utility, industrial, and infrastructure substations worldwide.

Moreover, the relay combines protection, control, monitoring, and automation within a single compact device.
Therefore, it supports reliable feeder operation while reducing engineering complexity and lifecycle costs.

Technical Data and Specifications

Product Family: SIPROTEC 4
Model: 7SJ62
Manufacturer: Siemens AG

Relay Type: Multifunction feeder protection relay

Protection Functions:

• Phase overcurrent protection

• Earth fault and directional earth fault protection

• Breaker failure protection

• Autoreclosure

• Thermal overload protection

Control and Automation:

• Local and remote circuit breaker control

• Integrated programmable logic (CFC)

Measuring and Recording:

• Event logging

• Fault recording

• Oscillographic disturbance recording

Communication Protocols:

• IEC 61850

• PROFIBUS-DP

• IEC 60870-5-103

• DNP3

• Modbus

Rated Auxiliary Power Supply:

• 110–250 V DC

• 115–230 V AC

Accuracy Class: 5P protection accuracy

Measuring Inputs:

• 3xV or 4xV

• 4xI, 1 A rated current

Binary Inputs / Outputs:

• 8 binary inputs

• 8 binary outputs

• 1 live status contact

Housing and Mounting:

• 1/3 19-inch rack

• Panel flush mounting

• Screw-type terminals

Operating Temperature: −25 °C to +55 °C
Standards Compliance: IEC, ANSI, EN protective relay standards
Shipping Weight: 6 kg

FAQ

Q1: What primary protection functions does the SIPROTEC 7SJ62 provide?
It provides overcurrent, earth fault, directional earth fault, breaker failure, and autoreclosure protection.

Q2: Can the 7SJ62 be integrated into IEC 61850 substations?
Yes, it fully supports IEC 61850 for protection, control, and monitoring communication.

Q3: What software is required for configuration?
Siemens DIGSI software is required for parameterization, testing, and commissioning.

Q4: Is the relay suitable for industrial power distribution systems?
Yes, it is widely used in industrial plants, utilities, and infrastructure power networks.

Q5: Does the relay include fault recording features?
Yes, it supports event logs and oscillographic fault recording for post-fault analysis.