Overcurrent & Earth-Fault Protection Solution — SIEMENS 7SJ5115-5CA00-0A/HH | SIPROTEC 4
Where This Product Is Used
The SIEMENS 7SJ5115-5CA00-0A/HH is a numerical overcurrent and earth-fault protective relay from the SIPROTEC 4 series, engineered for demanding industrial and utility protection applications. Typical deployment environments include:
- Medium-Voltage (MV) Feeder Protection — Radial and ring-main distribution feeders in substations (6 kV–35 kV), providing fast, selective fault clearance to minimize outage scope.
- Motor Protection — Large induction motors in petrochemical plants, water treatment facilities, and mining operations, guarding against phase overcurrent, earth faults, and thermal overload.
- Transformer Protection — HV/MV power transformers in industrial plants and utility substations, detecting winding faults and overloads before catastrophic failure.
- Generator Feeder Protection — Backup overcurrent protection for generator step-up transformers and generator bus feeders in power plants.
- Industrial Plant Distribution — Steel mills, cement plants, chemical complexes, and offshore platforms requiring IEC 61850-compatible protection with deterministic response times.
- Railway Traction Substations — Feeder protection for AC traction systems where high fault currents and asymmetric loading demand precise relay coordination.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 7SJ5115-5CA00-0A/HH |
| Series | SIPROTEC 4 |
| Function | Numerical Overcurrent & Earth-Fault Protective Relay |
| Rated Frequency | 50 / 60 Hz |
| Rated Current Input | 1 A / 5 A (selectable) |
| Auxiliary Voltage | DC 24–250 V / AC 100–230 V (variant dependent) |
| Protection Functions | ANSI 50, 51, 50N, 51N, 67, 67N, 46, 49, 74TC, 86 |
| Communication Interface | RS-485 / IEC 60870-5-103 (DIGSI 4 compatible) |
| Mounting | Flush panel / rack mounting (19″) |
| Operating Temperature | −25 °C to +55 °C |
| Degree of Protection | IP51 (front panel), IP20 (rear terminals) |
| Weight | Approx. 1.0 kg |
| Manufacturer | Siemens AG, Germany |
Why Engineers Specify This Model
- Proven SIPROTEC 4 Platform — Globally deployed in 100+ countries; extensive field history in utility and industrial protection since the late 1990s.
- Flexible Characteristic Curves — Supports IEC 60255 (Normal/Very/Extremely Inverse) and ANSI/IEEE curves, enabling seamless coordination with upstream and downstream devices from any manufacturer.
- Integrated Earth-Fault Detection — Sensitive earth-fault element (ANSI 51N/67N) detects high-impedance faults that conventional relays miss, critical for isolated or compensated neutral systems.
- DIGSI 4 Parameterization — Full configuration, testing, and event recording via DIGSI 4 software; no proprietary hardware dongle required for basic commissioning.
- Compact Form Factor — 1/3 × 19″ rack footprint reduces panel space by up to 40% versus electromechanical equivalents.
- Long Service Life — Designed for 20+ year operational life with firmware upgrade capability, protecting capital investment.
Complete System Bill of Materials
For a complete MV feeder protection panel using the 7SJ5115, engineers typically specify:
- SIEMENS 7SJ5115-5CA00-0A/HH — Overcurrent & Earth-Fault Relay (this unit)
- SIEMENS 7XV5662-0AD10 — RS-485 Communication Module
- SIEMENS 7XR6004-0AA00 — DIGSI 4 Parameterization Cable
- Current Transformers (CT) — 5P20 class, ratio matched to feeder rating
- SIEMENS SIMATIC S7-300 or equivalent PLC — For SCADA integration via IEC 60870-5-103
- 24 VDC Auxiliary Power Supply — SITOP PSU100S or equivalent
- Test Plug Block — OMICRON CPC 100 compatible for secondary injection testing
Compliance & Industry Standards
- IEC 60255 — Measuring relays and protection equipment
- IEC 60870-5-103 — Communication protocol for protection equipment
- ANSI/IEEE C37.90 — Relays and relay systems associated with electric power apparatus
- EN 50263 — Electromagnetic compatibility for measuring relays
- CE Marking — Compliant with EU Low Voltage and EMC Directives
- UL Listed — Recognized component for North American markets
Quality Assurance & Sourcing
Konmask.com sources the SIEMENS 7SJ5115-5CA00-0A/HH exclusively through verified industrial automation distributors and authorized channel partners. Every unit undergoes the following before dispatch:
- Visual inspection for physical damage, label integrity, and seal verification
- Firmware version check and documentation of factory settings
- Functional power-on test confirming LED status and communication handshake
- Anti-static packaging with humidity indicator card
- Certificate of conformity and original Siemens documentation included
We do not supply refurbished, reconditioned, or counterfeit parts. All units are traceable to original manufacturer batch records upon request.
How to Source This Part
- In-Stock Orders — Place order directly on Konmask.com; same-day processing for orders received before 15:00 CST.
- Bulk / Project Quantities — Contact support@konmask.com for volume pricing, lead-time commitment, and project BOM support.
- Urgent Requirements — Call +0086 19859288691 for expedited sourcing and air-freight options.
- Export & Cross-Border — We ship globally with full commercial invoice, packing list, and HS code documentation for customs clearance.
- Technical Pre-Sales — Our engineering team can verify compatibility with your existing protection coordination study before purchase.
Application-Specific FAQ
Q: Is the 7SJ5115-5CA00-0A/HH compatible with IEC 61850?
A: The 7SJ5115 communicates via IEC 60870-5-103 (RS-485). For IEC 61850 GOOSE/MMS, consider the SIPROTEC 5 series (e.g., 7SJ85). Contact us for an upgrade path assessment.
Q: Can this relay be used for directional overcurrent protection?
A: Yes. The /HH suffix variant includes directional elements (ANSI 67/67N), requiring voltage transformer (VT) inputs for directional discrimination.
Q: What DIGSI version is required for parameterization?
A: DIGSI 4 (version 4.70 or later recommended). DIGSI 5 is not backward-compatible with SIPROTEC 4 devices.
Q: Is a test report available?
A: Factory test reports can be requested at time of order. Third-party secondary injection test reports using OMICRON CMC 356 are available for an additional fee.
Q: What is the warranty period?
A: Konmask.com provides a 12-month warranty against manufacturing defects from date of shipment, with advance replacement available for critical applications.
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Contact: support@konmask.com | +0086 19859288691
