Avtron K492 Load Bank Resistor

The Avtron K492 is a portable, indoor, DC resistive load bank designed for testing Uninterruptible Power Supplies (UPS) and other DC power sources. It is utilized by field service personnel and in production line testing. The unit is engineered for reliability and ease of use in demanding industrial environments. Note that the Avtron K492 is a discontinued model and has been superseded by the ASCO Model 2200.

### Technical Specifications

* **Model:** Avtron K492
* **Type:** Portable DC Resistive Load Bank
* **Intended Use:** Testing UPS and other DC power sources, batteries, and DC power sources commonly used in the telecommunications industry.
* **Application:** Production line testing, job site use, field service personnel.
* **Load Capacity:** Up to 150 Amps
* **Voltage Rating:** 26 or 52 Volts DC. Also specified as 24/48 VDC.
* **Load Steps:** Twelve load steps for a total of 150 Amps. Specific steps include: 1A, 2A, 2A, 5A, 10A, 10A, 20A, 20A, 20A, 20A, 20A, 20A.
* **Resolution:** 1 Amp
* **Continuity:** Continuous duty operation with no cool-down period required.
* **Construction:** Rugged, durable steel enclosure with a powder coat paint finish. Aluminized steel construction per ASTM A463.
* **Cooling:** Integral cooling fans (approximately 400 CFM). Designed for indoor use with adequate ventilation; requires unrestricted airflow clearance for inlet and exhaust.
* **Overtemperature Protection:** Equipped with overtemperature protection, indicated by an indicator light.
* **Power Source:** Control and fan power (24 VDC at approximately 1.8 Amps) are derived from the input power terminals of the unit under test. An external 120V, 1 Phase, 60 Hz supply may be required for blower control circuit operation on some models.
* **Operating Environment:** Designed for indoor use.
* **Ambient Temperature Range:** -20°F to 120°F (-28°C to 50°C).
* **Dimensions (approximate):**
* Width: 19.50 inches [495.00 mm] (Intake side) / 18.00 inches [457.20 mm] (Exhaust side)
* Depth: 13.50 inches [342.90 mm]
* Height: 12.75 inches [323.80 mm] (Also listed as 13 inches [330.2 mm] in another source)
* **Weight (approximate):** 30 lbs. [13.61 kg]. Another source lists 35 lbs [15.8 kg].

### Electrical Specifications

* **Input Terminals:** Labeled 48 Volts (+), 24 Volts (+), NEG (~), and GND. The NEG (-) terminal is common to both voltages.
* **Meters:** Large, easy-to-read voltmeter (0-60 V, ±2%) and ammeter (0-200 A, ±2%). Analog volt and ammeter (model dependent).
* **Load Elements:** Avtron helically wound chromium alloy wire resistive load elements. Designed to operate at approximately 1/3 of their maximum temperature rating to ensure reliability.
* **Load Tolerance:** -0, +5%.
* **Power Input (Control/Fan):** 24 VDC at approximately 1.8 Amps, derived from the tested power source.

### Controls and Indicators

* **Master Load ON/OFF Switch:** Controls power to the unit, load steps, and fan power.
* **Load Step Switches:** 12 toggle-type load step switches for granular load application.
* **Overtemperature Indicator:** A lamp on the control panel that illuminates if the load bank is overheating or if reverse polarity is connected.
* **On/Off Switch:** Power On/Off switch.

### Physical Characteristics

* **Enclosure:** Durable steel enclosure with a powder coat paint finish. Heavy gauge aluminized steel per ASTM A463.
* **Portability:** Lightweight and features a large, comfortable carrying handle. Rubber support feet.
* **Cooling:** Four muffin-type cooling fans for quiet operation. Approximately 400 CFM cooling capacity.
* **Finish:** High-quality baked polyester powder coat finish, standard color gray (ANSI 61).

### Compatibility

* **Power Sources:** Designed for testing UPS, batteries, and other DC power sources. Specifically suited for 26/52 VDC or 24/48 VDC systems.
* **Industry Standards:** Complies with NEMA, NEC, and ANSI standards. Quality control system certified to ISO9001 standards.

Why Choose Aumictech for Avtron K492?
At Aumictech, we specialize in supplying high-end industrial test equipment. Whether you need reliable DC power source testing, precise load application for UPS systems, or robust equipment for telecommunications applications, our team ensures the Avtron K492 delivers maximum performance for your application.