ABB SPAJ 110 C / SPAJ 110 C-AA Rev.A Protection Relay

Description

 

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🔹 ABB SPAJ 110 C / SPAJ 110 C-AA Rev.A Protection Relay

ABB OY Distribution Automation Series

Product Introduction

The ABB SPAJ 110 C Protection Relay, including the SPAJ 110 C-AA Rev.A variant, is a robust and reliable protection device designed for current-based protection in electrical distribution systems. Developed under ABB OY Distribution Automation, this relay is engineered to provide dependable fault detection and fast tripping performance for feeders, transformers, and auxiliary power circuits.

With its proven protection philosophy and durable construction, the SPAJ 110 C is well suited for long-term operation in industrial and utility environments where stability and reliability are essential.

🔗 Product link: www.dcsplcsystem.com

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⚙️ Product Parameters

Parameter	Specification
Product Type	Protection Relay
Model	SPAJ 110 C / SPAJ 110 C-AA
Hardware Revision	Rev.A
Protection Function	Overcurrent Protection
Current Input	1 A / 5 A selectable
Rated Frequency	50 / 60 Hz
Auxiliary Supply Voltage	Wide-range AC/DC
Trip Output	Relay contact output
Indication	Front-panel LEDs
Adjustment Method	Rotary switches / setting knobs
Mounting Type	Panel mounting
Operating Temperature	–25 °C to +55 °C

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📄 Product Datasheet (Technical Summary)

• Numerical overcurrent protection relay
• Stable and repeatable tripping characteristics
• Adjustable current and time settings
• High immunity to electrical interference
• Clear visual indication of operating status
• Designed for continuous industrial operation
• Compact and durable enclosure

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🌍 Country of Origin

Manufactured by ABB OY Distribution Automation
Origin: Finland / Europe

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🏭 Application Fields

The ABB SPAJ 110 C protection relay is commonly used in:

• Electrical distribution networks
• Medium-voltage and low-voltage feeders
• Transformer protection schemes
• Industrial substations
• Utility distribution systems
• Manufacturing and process plants
• Auxiliary power and control circuits

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📘 Product Usage Instructions

1. Installation
   • Mount the relay securely on a control panel or relay rack.
   • Ensure proper grounding and sufficient ventilation.
2. Wiring
   • Connect current transformer inputs according to rated values.
   • Wire trip outputs to circuit breakers or protection interlocks.
3. Settings Configuration
   • Adjust pickup current and time delay using front-panel controls.
   • Verify coordination with upstream and downstream protection.
4. Commissioning
   • Perform functional tests to confirm correct tripping behavior.
   • Check LED indicators for normal operating status.
5. Operation
   • Monitor relay indications during system operation.
   • Reset the relay after fault clearance.

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🧩 Product Technical Description

The SPAJ 110 C / SPAJ 110 C-AA Rev.A operates by continuously measuring line current through connected current transformers. When the measured current exceeds the preset pickup value, the relay initiates a timing sequence based on the selected characteristic. If the fault persists beyond the defined delay, the relay issues a trip command to isolate the affected circuit.

The relay’s internal electronics are designed for high thermal and electrical stability, ensuring accurate protection performance over long service periods. Its simple yet robust design minimizes maintenance requirements while maintaining dependable fault response.

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❓ Frequently Asked Questions (FAQ)

Q1: What protection function does the SPAJ 110 C provide?
It provides overcurrent protection for feeders and auxiliary circuits.

Q2: Is the relay suitable for both MV and LV systems?
Yes, it can be applied in both medium-voltage and low-voltage installations.

Q3: How are protection settings adjusted?
Settings are configured using front-panel rotary switches or knobs.

Q4: Does the relay require frequent maintenance?
Only periodic inspection and functional testing are recommended.

Q5: Is the relay designed for continuous operation?
Yes, it is suitable for continuous 24/7 industrial and utility service.

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[service contact information]
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E-mail: dcsplcsales@gmail.com
Contact Person: Simon
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