Multilin 239-AN-H Motor Protection Harsh Environment

Availability: 10 left in stock

Product Overview The GE Multilin 239-AN-H provides advanced microprocessor-based protection for small to medium-sized three-phase AC motors. This solid-state relay monitors critical...

SKU: 239-AN

Manufacturer: GE Fanuc
Product No.: 239-AN
Product Type: Motor Protection Relays
Product Origin: USA
Payment:T/T, Western Union
Weight: 1800g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Overview

The GE Multilin 239-AN-H provides advanced microprocessor-based protection for small to medium-sized three-phase AC motors. This solid-state relay monitors critical electrical parameters to defend against thermal damage, mechanical failures, and power quality issues. We supply this unit as 100% Brand New, featuring the specialized -H suffix for Harsh Environment Conformal Coating. This protective layer shields the internal circuitry from moisture, salt spray, and corrosive atmospheric contaminants, making the 239-AN-H the standard choice for mining, wastewater treatment, and offshore oil and gas facilities.

Technical Specifications

The 239-AN-H integrates high-speed sensing with a rugged power supply to ensure continuous motor monitoring.

Feature	Specification
Control Power (AC)	70–265 VAC (50/60 Hz)
Control Power (DC)	90–300 VDC
Output Contact Rating	10 Amp @ 250 VAC (Resistive)
Protection Elements	Thermal Overload, Ground Fault, Phase Unbalance, Single Phasing
Mechanical Protection	Locked Rotor, Mechanical Jam, Undercurrent
Thermal Model	15 Selectable Standard Overload Curves
Inhibit Functions	Starts-per-hour, Time-between-starts, Restart Inhibit
Communication	RS485 Port (Modbus RTU Protocol)
Coating	Harsh Environment Conformal Coating (Option -H)
Operating Temp	–20°C to +60°C (–4°F to +140°F)

Engineering Advantages

Precision Thermal Modeling: The 239-AN-H calculates motor temperature in real-time by analyzing current inputs through 15 selectable thermal curves. This prevents nuisance trips during heavy-load startups while ensuring a definitive shutdown before the motor insulation reaches critical degradation temperatures.
Corrosion Resistance: The conformal coating on the internal PCBA prevents "silver whiskering" and dendritic growth caused by humidity and chemical vapors. This ensures long-term reliability in environments where standard, uncoated relays frequently fail due to short circuits.
Startup Supervision: The relay tracks "Starts-per-hour" and "Time-between-starts" to prevent the excessive heat buildup caused by rapid recycling of the motor. These inhibits protect the rotor and stator from thermal fatigue, significantly extending the motor's operational lifespan.
Predictive Diagnostics: An integrated alphanumeric LCD and RS485 Modbus port provide access to trip history and event recording. Maintenance teams use this data to identify recurring mechanical jams or phase unbalances before a catastrophic motor failure occurs.

FAQs

What is the benefit of the "-H" conformal coating option?

The coating provides a non-conductive barrier against moisture, dust, and corrosive chemicals. In industries like wastewater or chemical processing, this coating prevents atmospheric contaminants from corroding the electronic traces on the circuit board, reducing the risk of premature relay failure.
Can the 239-AN-H be used with both AC and DC control power?

Yes. The universal power supply accepts a wide range of inputs, including 70–265 VAC and 90–300 VDC. This flexibility allows the relay to operate using standard utility power or a substation battery bank.
How does the relay handle ground faults?

The 239-AN-H monitors zero-sequence current. When a ground fault exceeds the user-defined threshold, the relay triggers an alarm or a trip signal to isolate the motor, preventing potential fire hazards and further equipment damage.
Is the 10A output rating sufficient for direct motor control?

The 10A rating refers to the relay's internal output contacts. These contacts typically switch the coil of a larger motor starter or contactor rather than the primary motor leads themselves. Always verify that your contactor coil's inrush current falls within the 10A resistive rating.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.