Product Overview

Small and medium electrical cabinets often contain PLCs, communication modules, power supplies, relays, gateways, meters and control electronics. These components generate heat, and the heat can become trapped inside the enclosure, especially when the cabinet is sealed or installed outdoors.

The HPC300T provides dedicated enclosure cooling with a short internal air path and uniform cooling air distribution. It is useful for compact cabinets where fan ventilation is not suitable due to dust, humidity, high ambient temperature or IP protection requirements.

Key Features

Typical Applications

Technical Specifications — HPC300T

Package Details

Installation and Mounting

The HPC300T is designed for door-mounted or face-mounted installation. The product drawing shows the compact body size with flange dimension of 352 × 582mm and 14 × Ø6 mounting holes for the installation arrangement.

Why Use Closed-Loop Cabinet Cooling?

Open ventilation fans can introduce dust, moisture and hot ambient air into the enclosure. Closed-loop cabinet air conditioning keeps internal cabinet air separated from external air while removing heat from the cabinet.

• Protects PLCs, power supplies, relays, gateways and electronics from high cabinet temperature.
• Reduces dust and humidity exposure compared with open ventilation cooling.
• Improves reliability of control and communication equipment in hot environments.
• Useful for outdoor cabinets where ambient conditions are harsh.
• Supports stable cabinet temperature for automation and monitoring systems.
• Helps reduce unplanned downtime due to heat-related component failure.

Heating Option and Condensation Control

The HPC300T includes an optional 300W heating capacity. This is useful where cabinet equipment may be exposed to low ambient temperatures, condensation risk or large temperature swings.

• Helps maintain cabinet internal temperature during low-temperature periods.
• Supports protection of sensitive electronics from condensation-related issues.
• Useful for outdoor cabinets, remote panels and sites with day / night temperature variation.
• Heating option should be confirmed during order selection and project specification.

Recommended Selection Process

Correct cabinet air conditioner sizing depends on internal heat load, cabinet size, ambient temperature, target internal temperature and installation environment. The cooling capacity should be selected based on real heat load, not only cabinet size.

• Calculate total internal heat load from power supplies, controllers, relays and installed electronics.
• Confirm indoor or outdoor installation and maximum ambient temperature.
• Confirm required cabinet internal temperature or thermostat setpoint.
• Check cabinet size, insulation, solar exposure and heat gain from surroundings.
• Confirm whether optional heating is required for condensation or low-temperature protection.
• Confirm IP rating requirement and whether closed-loop cooling is required.
• Confirm door strength, cut-out size and available mounting area.
• Confirm power supply, alarm wiring, RS485 communication and monitoring requirement.

Integration with IoTWatt 4.0 and Monitoring Systems

The HPC300T includes RS485 communication and dry contact alarm output, making it suitable for integration into cabinet monitoring systems, PLCs, BMS, EMS or IoTWatt 4.0. Cabinet cooling alarms and temperature-related status can be used to improve maintenance response and protect critical electronics.

• Connect dry contact alarm to PLC, remote I/O or monitoring gateway.
• Use RS485 communication where supported for temperature and status monitoring.
• Monitor cabinet temperature together with equipment power and operating data.
• Create alarms or maintenance tickets when cabinet temperature rises or cooling fault occurs.
• Use IoTWatt 4.0 to correlate cabinet temperature, power consumption and equipment operation.