ABB 1SDA054897R1 Shunt Release

Basic Information & Model Code Explanation

Basic Profile

Original Part No.: 1SDA054897R1

Product Name: Shunt Release (SOR)

Product Line: Special accessory for ABB Tmax T moulded case circuit breakers (MCCB)

Applicable Devices: T1 160, T2 160 frame MCCBs (compatible with 3P/4P versions)

Main Function: Remote electric tripping under AC power. It only performs tripping without electric closing; manual closing is required.

Code Breakdown (General Rules for ABB Low-Voltage Accessories)

1. `1SDA`: Global unified prefix for standard ABB circuit breaker accessories, representing low-voltage power distribution components.
2. `054897`: Unique serial code indicating function, voltage rating and applicable models.
3. `R1`: Hardware revision. It is the only mass-produced version with no alternative replacements.
4. Detailed Technical Specifications

Important Note: Never keep the coil energized continuously for a long time. Energization over 5 seconds will easily damage the insulation and windings.

3. Full Product List of the Same Series (Exclusive for T1/T2 160, Not Interchangeable with Other Frames)

This series consists of two independent categories: Shunt Release (SOR) and Undervoltage Release (UVR). Mixing usage is prohibited.

3.1 Shunt Release (Trips when energized, widely used for remote control & fire emergency cut-off)

1. 1SDA054897R1: AC230V 50/60Hz (Main model)
2. 1SDA054898R1: AC400V 50/60Hz

3.2 Undervoltage Release (Trips when power fails, for undervoltage protection)

1. 1SDA054899R1: AC230V
2. 1SDA054900R1: AC400V

Important Reminder

The above part numbers only fit T1 160 / T2 160. ABB T3/T4/T5/T6 large-frame MCCBs adopt another set of 1SDA codes and have incompatible physical structures.

4. Production Status & Original Replacements
5. Production Status: In regular mass production. No discontinuation, phase-out or upgrade plan.
6. Version Compatibility: R1 is the universal version for the whole series. Products of new and old batches are 100% interchangeable in hardware, wiring and functions, and can be mixed on site.
7. Original Replacements: No equivalent original models available. Use 1SDA054897R1 directly for procurement.
8. Cross-Brand Equivalent List (AC230V Shunt Release for 160 Frame MCCB)

Domestic AC220V power grid is compatible with imported AC230V products for direct replacement.

5.1 Overseas Brands

5.2 Domestic Brands (Cost-effective alternatives for distribution cabinets)

6. Application Scenarios & Operating Restrictions

✅ Recommended Applications

1. Fire Emergency Cut-off Circuit (Most Common): Linked with fire alarm control panel to cut off non-fire loads in buildings.
2. Intelligent Power Distribution System: Remote tripping via PLC, DCS and smart meters.
3. Remote Operation for Transformer Cabinets & Distribution Rooms: Power cut for unattended stations.
4. Industrial Safety Circuits: Main power disconnection linked with equipment emergency stop and safety signals.
5. Remote control of main power & lighting circuits in shopping malls, factories and buildings.

❌ Prohibited & Restricted Applications

1. DC control circuits: This product is designed for AC only. DC supply causes malfunction and permanent damage.
2. Continuous long-term energization: Violates short-time duty design and will burn out the coil.
3. High-frequency repeated operation: Over 10 operations per minute will drastically shorten service life.
4. Outdoor exposed areas with rain, heavy corrosion or conductive dust: IP20 provides no water or corrosion resistance. A sealed cabinet is mandatory.
5. Operation above 2000m without derating: Insulation performance decreases at high altitude, leading to false tripping and creepage faults.
6. Installation, Wiring & Safety Regulations

7.1 Pre-installation Requirements

Cut off the upstream main power supply completely and verify zero voltage inside the cabinet before work. Live installation and disassembly are strictly forbidden.

Snap-fit installation: Align the accessory with the dedicated slot inside the circuit breaker and press to lock. No extra screws are needed.

Post-installation test: Manually close and trip the breaker 3 to 5 times to confirm smooth mechanical movement without jamming.

7.2 Wiring Regulations

1. The product is fitted with two flexible leads. The AC circuit is non-polarized; connect directly to the external control circuit.
2. Install a 1A~2A miniature fuse in series in the control circuit to prevent fault spreading caused by coil short circuit.
3. Separate strong and weak current wiring: Run control cables separately from main power cables to avoid electromagnetic interference.
4. Control logic: Adopt pulse triggering (energization duration: 1~3s). Continuous power supply is forbidden.

7.3 Working Principle Summary

Coil energized → Trigger tripping → Circuit breaker trips. The tripping mechanism remains locked after power cut; manual closing is required for reset.

8. Troubleshooting & Maintenance

Fault 1: Circuit breaker fails to trip after energization

Possible Causes: No power / low voltage in control circuit, broken leads / loose connections, open coil circuit, mechanical jamming

Troubleshooting Steps:

1. Measure voltage across leads with a multimeter to ensure it is within AC161V~253V.
2. Check cable continuity and terminal tightness; replace damaged leads immediately.
3. Remove the accessory after power cut and clean dust and foreign objects inside the mechanism.
4. Replace with new 1SDA054897R1 if voltage and wiring are normal but no operation (coil burnout).

Fault 2: Repeated coil burnout and overheated insulation

Root Causes: Continuous energization, overvoltage, surge impulse

Solutions:

1. Modify control logic and add an intermediate relay for short pulse triggering.
2. Install varistors or surge absorbers in the control circuit to suppress voltage spikes.
3. Inspect upstream power supply to eliminate three-phase unbalance and overvoltage issues.

Fault 3: Accidental tripping without control signal

Causes: Induced voltage from mixed strong/weak current wiring, cable leakage, loose assembly

Solutions:

1. Run control cables in separate conduits or use shielding for physical isolation from power cables.
2. Connect a bleeder resistor in parallel with the control circuit to eliminate induced voltage.
3. Re-seat the snap fastener to ensure firm assembly.

Fault 4: Slow or incomplete tripping

Cause: Dust and debris trapped in mechanical mechanism

Solution: Blow clean with dry compressed air after power cut. Do not disassemble the mechanism or add lubricant (Factory-applied grease is designed for full service life).

9. Certification, Logistics & Storage Requirements
10. Certifications: Approved with CCC (China Compulsory Certification) and CE (EU Certification), compliant with domestic projects and export to EU countries.
11. Storage: Store in cool and dry environment; avoid moisture and heavy compression.
12. Transportation: Pure electromagnetic coil component, no lithium batteries or magnetic dangerous goods. Classified as general cargo for air and sea transportation with no special restrictions.
13. On-site Selection Tips

Differentiation of Similar Products (Common Confusion Points)

SOR (1SDA054897/98): Trip on energization → For remote control & fire emergency cut-off

UVR (1SDA054899/00): Trip on power loss → For power failure protection & motor undervoltage protection