Description
🔧 Product Overview
The HYUNDAI UAN16A3B M1C1S168J is a heavy-duty 3-pole Air Circuit Breaker designed for high-voltage industrial electrical distribution and protection applications. The unit is rated for up to 1000V and 50/60Hz operation, with a 12kV impulse withstand rating identified in the product specifications.
This breaker is intended for applications where reliable circuit isolation, switching, and overcurrent protection are required in industrial power systems, electrical distribution equipment, and marine or heavy-duty installations. The listed unit has a maximum current rating of 1600A.
⚙️ Key Features
🔹 3-pole air circuit breaker configuration
🔹 Rated insulation voltage: 1000V
🔹 Maximum current: 1600A
🔹 50/60Hz operating frequency
🔹 12kV UIMP rating as listed
🔹 TC current specification: 100–130A
🔹 Heavy-duty construction for industrial power distribution
🔹 Suitable for switching and circuit protection applications
🔹 Hyundai industrial electrical equipment
🔹 Approximate listed weight: 64 kg
📋 Technical Information
🏷️ Brand: HYUNDAI / Hyundai Heavy Industries
🔢 Model: UAN16A3B M1C1S168J
⚡ Product Type: 3-Pole Air Circuit Breaker
🔌 Rated Voltage (Ui): 1000V
⚡ Maximum Current (In Max): 1600A
🔢 Number of Poles: 3
〰️ Frequency: 50/60Hz
⚡ Impulse Withstand Voltage (UIMP): 12kV
🔧 TC Current: 100–130A
⚖️ Approx. Weight: 64 kg
🌏 Country of Origin: South Korea
🔖 Code: 5832000247
The exact protection-unit characteristics, trip settings, auxiliary contacts, operating mechanism, and terminal configuration should be confirmed from the nameplate and physical configuration of the individual breaker before installation.
🛡️ Main Function
An air circuit breaker provides controlled switching and protection for high-current electrical circuits. In an industrial distribution system, it can be used to disconnect a circuit during maintenance and interrupt abnormal current conditions according to the installed protection configuration.
The three-pole construction allows the breaker to control a three-phase electrical circuit. Its 1000V insulation-voltage specification makes correct system matching particularly important before commissioning.
🏭 Typical Applications
The UAN16A3B series can be considered for applications such as:
• Industrial electrical distribution panels
• High-current three-phase power systems
• Motor and machinery power distribution
• Generator and auxiliary power systems
• Marine electrical distribution equipment
• Industrial switchboards
• Power plant electrical systems
• Replacement of legacy Hyundai circuit breakers
For replacement work, the complete part number should be matched rather than selecting a breaker only by voltage or current rating.
🔩 Installation & Replacement Guide
1. Isolate the electrical system
Before handling the breaker, completely isolate the relevant power source and follow the site’s lockout/tagout procedure.
2. Verify the nameplate
Confirm UAN16A3B, M1C1S168J, voltage, current, frequency, pole count, and protection-unit markings.
3. Check the mechanical arrangement
Compare mounting dimensions, busbar position, terminals, operating mechanism, and accessory configuration with the existing breaker.
4. Confirm protection settings
Do not assume the 100–130A TC marking represents every protection setting. Verify the actual trip-unit configuration on the breaker.
5. Inspect before energizing
Check insulation surfaces, terminals, contacts, mechanical movement, arc-related components, and signs of corrosion or overheating.
6. Perform functional testing
After installation, carry out appropriate insulation, continuity, mechanical operation, trip, and protection tests according to the site’s electrical safety procedures.
🔍 Identification Checklist
When purchasing a replacement, compare:
✔ HYUNDAI brand marking
✔ UAN16A3B series
✔ Full MPN: M1C1S168J
✔ 1000V rating
✔ 3-pole construction
✔ 50/60Hz frequency
✔ 1600A maximum current marking
✔ 12kV UIMP marking
✔ TC 100–130A marking
✔ Terminal and mounting arrangement
✔ Protection and accessory configuration
🧰 Maintenance Notes
For a used high-current air circuit breaker, inspection is especially important before returning it to service.
Check the main contacts for excessive wear or pitting, inspect insulating components for cracks or tracking, verify the operating mechanism moves smoothly, and examine terminals for heat discoloration or corrosion. The breaker should also be tested with appropriate electrical test equipment before being connected to an energized system.
❓ FAQ
Q: Is UAN16A3B M1C1S168J a 3-pole breaker?
A: Yes. The listed configuration is a 3-pole Air Circuit Breaker.
Q: What is the voltage rating?
A: The listed insulation/rated voltage is 1000V.
Q: What is the maximum current?
A: The matching listing identifies an IN MAX rating of 1600A.
Q: What does the 12kV specification represent?
A: The listing identifies 12kV as UIMP, meaning the impulse withstand voltage specification.
Q: Is this a low-voltage miniature circuit breaker?
A: No. This is a large industrial Air Circuit Breaker intended for high-current power distribution applications.
Q: Can another UAN16A3B breaker be used as a direct replacement?
A: Not automatically. The complete model suffix, protection unit, accessories, mounting arrangement, terminals, and electrical ratings should be checked before substitution.
📦 Product Condition
The specific eBay listing provided is marked Used. The listed unit weighs approximately 64 kg. Because this is a large power breaker, buyers should verify the physical condition, nameplate, accessories, and exact configuration before installation.
