SIEMENS LF2005-S/SP34 (A5E31867280) Current Transformer | Replacement, Equivalent & Selection Guide
The SIEMENS LF2005-S/SP34 (Part No. A5E31867280) is a precision current transformer designed for industrial measurement and protection applications within SIEMENS SENTRON and related power monitoring systems. This page provides full technical specifications, compatible replacement options, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Manufacturer: SIEMENS
- Part Number: A5E31867280
- Model: LF2005-S/SP34
- Type: Current Transformer (CT)
- Series: LF2005 / SENTRON Accessories
- Primary Current: 2000 A (nominal)
- Secondary Current: 5 A
- Accuracy Class: Class 0.5 / Class 1 (application-dependent)
- Rated Burden: Per IEC 61869-2 standard
- Insulation Voltage: 0.72 kV
- Mounting: Bus-bar / panel mount
- Weight: ~500 g
- Compliance: IEC 61869-2, CE
Compatible Replacement & Equivalent Models
If the original SIEMENS A5E31867280 LF2005-S/SP34 is unavailable or you are evaluating alternatives, the following models offer compatible or equivalent performance:
- SIEMENS LF2010-S/SP34 — Higher primary rating (2000/5 A), same series, verify burden rating
- SIEMENS 4NC9 Series CTs — SENTRON-compatible, suitable for 3VA/3WL circuit breaker panels
- ABB KEVI 2000/5 A — IEC-compliant equivalent, Class 0.5, verify physical dimensions
- Schneider Electric METSECT5CC200 — 2000/5 A, Class 1, compatible with PowerLogic systems
- Chint BH-0.66 2000/5 — Cost-effective alternative for non-critical measurement loops
Note: Always verify primary/secondary ratio, accuracy class, burden rating, and physical dimensions before substitution. Contact support@konmask.com for cross-reference assistance.
Why Choose the Original Model
- OEM Accuracy: Factory-calibrated to IEC 61869-2 Class 0.5 — critical for billing-grade metering
- Plug-and-Play Compatibility: Designed specifically for SIEMENS SENTRON PAC metering and 3VA/3WL protection systems
- Proven Reliability: Validated for continuous industrial operation in harsh electrical environments
- Warranty & Traceability: Full SIEMENS supply chain documentation and CE certification
- Long Service Life: Thermally stable core material rated for extended duty cycles
Typical Applications
- Main incomer metering in MV/LV switchgear panels
- Energy monitoring with SIEMENS SENTRON PAC3200 / PAC4200 / PAC5200
- Protection relay input for overcurrent and earth-fault schemes
- Power quality analysis in industrial plants and data centers
- Building management systems (BMS) with sub-metering requirements
- Motor control centers (MCC) with integrated power monitoring
System Compatibility
- SIEMENS SENTRON PAC Series: PAC3200, PAC4200, PAC5200 — direct compatible
- SIEMENS 3VA Molded Case Circuit Breakers — external CT input compatible
- SIEMENS 3WL Air Circuit Breakers — panel-mount CT configuration
- SIEMENS SICAM / SIPROTEC Relays — standard 5 A secondary input
- Third-party meters with 5 A CT input — verify burden and accuracy class
Selection Guide
Use the following criteria to confirm the LF2005-S/SP34 is the right choice, or to identify a suitable alternative:
- Step 1 — Primary Current: Confirm your bus-bar or cable carries up to 2000 A continuous load
- Step 2 — Secondary Output: Confirm your meter or relay accepts 5 A secondary input (not 1 A)
- Step 3 — Accuracy Class: Class 0.5 for revenue/billing metering; Class 1 acceptable for monitoring only
- Step 4 — Burden Rating: Calculate total secondary circuit burden (wiring + meter input impedance) — must not exceed CT rated burden
- Step 5 — Physical Fit: Verify window/aperture size matches bus-bar cross-section; confirm panel cutout dimensions
- Step 6 — Compliance: Confirm IEC 61869-2 compliance is required by your project specification
Not sure? Send your panel drawing or existing CT nameplate data to support@konmask.com — our engineers will confirm compatibility within 24 hours.
Quality Assurance & Sourcing
- Source: Authorized distribution channels and verified surplus stock
- Inspection: Each unit visually inspected and cross-checked against SIEMENS part number database
- Documentation: Certificate of conformity and packing list provided with every shipment
- Packaging: Original or equivalent anti-static protective packaging
- Lead Time: In-stock items ship within 1–3 business days; ex-stock lead time quoted on request
How to Order
- Click Add to Cart or Contact Us for bulk/project pricing
- Provide your project quantity, delivery address, and any required documentation (COC, test reports)
- Receive proforma invoice within 24 hours
- Payment via T/T, PayPal, or trade credit (approved accounts)
- Shipment via DHL / FedEx / SF Express with full tracking
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I use LF2005-S/SP34 to replace a 2000/5 A CT from another brand?
A: Yes, provided the accuracy class, burden rating, and physical dimensions are compatible. Contact us to verify.
Q: What is the difference between LF2005-S and LF2005-S/SP34?
A: The /SP34 suffix denotes a specific mechanical or connection variant. Always order by full part number A5E31867280 to ensure exact match.
Q: Is this CT suitable for use with a 1 A input meter?
A: No. The LF2005-S/SP34 has a 5 A secondary output. For 1 A input meters, a different CT model is required — contact us for alternatives.
Q: Do you provide test certificates?
A: Yes. Certificate of conformity is available. Factory calibration certificates can be requested for critical metering applications.
Q: What is the minimum order quantity?
A: No minimum order quantity. Single units and project quantities both welcome.
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Contact: support@konmask.com | +0086 19859288691
