12NLR21E2A GE

Description

Product Name: 12NLR21E2A GE Output module

Product details:

The GE 12NLR21E2A is a heavy-duty, electromechanical/static automatic reclosing relay belonging to GE’s classic NLR series. Its primary function is to automatically initiate the reclosing of a power circuit breaker after it has been tripped by an external protective relay due to a line fault. Because a large percentage of overhead line faults are transient (e.g., lightning strikes or temporary tree branches touching a line), this relay prevents long power outages by swiftly restoring power.

Technical Specifications (Product Parameters)

• Manufacturer: General Electric (GE)
• Model/MPN: 12NLR21E2A
• Relay Type: Automatic Reclosing Relay (NLR Series)
• Control/Rated Voltage: 125 V DC
• Instruction Manual Reference: GEK-36862
• Construction Format: Drawout case (housed in a rugged protective steel chassis/cradle for easy extraction and maintenance).
• Physical Footprint (Approx. Shipping Dimensions): 16.0 \times 12.0 \times 10.0 inches (40.6 \times 30.5 \times 25.4 cm)
• Weight: Approx. 15 lbs (6.8 kg)

Product Advantages

• Proven Reliability: Built upon GE’s legacy grid protection design, offering extreme mechanical robustness and high immunity to electrical noise/electromagnetic interference (EMI).
• Modular Drawout Design: The internal mechanism is mounted in a “cradle” configuration. This allows maintenance staff to safely and swiftly pull the unit completely out of its outer case without disturbing external wiring or shorting out terminal blocks.
• Optimized Grid Continuity: Minimizes downtime on power distribution lines by rapidly clearing transient faults through automated multi-shot or single-shot reclosing profiles.
• Clear Mechanical Diagnostics: Features highly visible internal targets or flag indicators to quickly show field engineers whether the relay has initiated a shot or reached a lockout state.

Product Applications

The 12NLR21E2A relay is widely deployed across industrial and utility infrastructure, specifically targeting:

• Electrical Substations: Positioned alongside transmission and distribution overhead line circuit breakers.
• Utility Distribution Networks: Utilized on radial or loop distribution lines prone to transient environmental interruptions (wind, lightning, wildlife interference).
• Industrial Power Plants: Deployed in heavy manufacturing setups or oil & gas refineries where continuous power uptime is highly critical.

Important Safety & Operation Precautions (Notes)

• Lockout Awareness: If a fault is permanent (e.g., a downed power line), the relay will attempt its pre-configured reclosing cycles and then progress to a permanent “Lockout” state. Manual operator intervention is required to inspect the line and reset the system.
• Circuit Breaker Readiness: When configuring immediate or rapid initial reclosing sequences, ensure that the corresponding circuit breaker mechanism utilizes a properly adjusted latch-checking or position switch. The breaker must be fully charged and physically capable of handling a rapid close-open duty cycle.
• Handling & Extraction: Before removing the internal cradle using the drawout handles, ensure you pull the main connecting plug sequence properly. This ensures that current-transformer (CT) and control power paths are appropriately isolated.
• Storage Requirements: If storing the device as a spare parts asset, keep it inside its original dust-free packaging. Store it in a dry, well-ventilated location free from moisture, metallic chips, or excessive ambient vibration.

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Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: United States
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
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