7SJ5311-4EA02-1AA0/FF Siemens SIPROTEC 7SJ531 Datasheet & Manual

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Siemens 7SJ5311-4EA02-1AA0/FF SIPROTEC 7SJ531 Protection Relay Configured for feeder and motor protection in industrial substations and distribution networks, the Siemens...

SKU: 7SJ5311-4EA02-1AA0/FF

Manufacturer: Siemens
Product No.: 7SJ5311-4EA02-1AA0/FF
Product Type: Numerical Protection Relays
Product Origin: Germany
Payment:T/T, Western Union
Weight: 1430g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Siemens 7SJ5311-4EA02-1AA0/FF SIPROTEC 7SJ531 Protection Relay

Configured for feeder and motor protection in industrial substations and distribution networks, the Siemens 7SJ5311-4EA02-1AA0/FF (7SJ531 Numerical Protection Relay) provides direct physical/electrical execution.

Hardware Specifications

Parameter	Specification
Model	7SJ5311-4EA02-1AA0/FF
Brand	Siemens
Origin	Germany / USA
Weight	1.43 kg (3.15 lbs)
Dimensions	260 mm x 330 mm x 95 mm
Operating Temp	-25 deg C to +60 deg C
Power Consumption	Passive measurement overhead; auxiliary voltage bounds 24-250 V DC / 80-230 V AC
Analog Inputs	5 x CT (current transformer), 3 x VT (voltage transformer)
Digital I/O	11 binary inputs, 5 alarm relays, 4 command relays
Protocols	IEC 61850, IEC 870-5-103, PROFIBUS, RS485, MODBUS, DNP3
Interface	Integrated graphic display with local control keypad matrix

Profinet / EtherNet/IP Deterministic Networks and I/O Density Scaling

The numerical protective architecture interfaces with substations through its comprehensive hardware array, handling concurrent overcurrent, voltage, and frequency protection tasks. Field data mapped over multi-protocol ports ensures integration with centralized monitoring nodes. This I/O density scaling capacity enables instantaneous binary telemetry routing across Profinet / EtherNet/IP deterministic networks when retrofitted with protocol gateway interfaces. This architecture maintains microsecond fault time-stamping accuracy without data dropouts on high-speed system buses.

Frequently Asked Questions

Q: What action must be executed to alter parameter configurations or review structural fault logs?

A: Modifications and diagnostic analytics require a physical connection to a terminal running DIGSI 4 or DIGSI 5 setup software. Parameters cannot be edited through external serial command lines without validating security keys inside the DIGSI environment.

Q: How does the unit react to deep supply voltage fluctuations on the auxiliary power circuit?

A: The broad range switching matrix accepts 24 V DC to 250 V DC and 80 V AC to 230 V AC. Variations remaining inside these calibrated electrical plateaus do not impact trip coil activation speeds or logic board processing stability.

Field Installation Guidelines

Enclosure Subpanel Mounting: Mount the chassis in a clean panel layout cut to match the structural depth clearances. Fasten all corner retainers to prevent vibration-induced mechanical stresses.
Transformer Secondary Grounding: All current transformer (CT) and voltage transformer (VT) connections must be firmly terminated at the back terminal strips. Ensure common-point grounding rules are strictly maintained to prevent floating high-voltage potentials.
Communication Cable Shielding: Lay serial and ethernet lines separated from raw motor power circuits, grounding the line shields at the cable entry gland plates to mitigate induced electromagnetic fields.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

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Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.