HL-LD series low temperature circuit breaker

HL-LD series low temperature circuit breakers work in single pole double throw mode. Typical applications include: used to protect heat exchangers, surface coolers and liquid service lines under low temperature conditions to avoid overcooling or freezing. The controller is compact, reliable and features an adjustable temperature set point with fixed hysteresis. When the
temperature of any 200mm long part of the temperature sensing capillary drops to the temperature point set by the dial, the internal switch is turned off. The internal switch is not turned back on until the temperature rises to
more than 4° C higher than the set temperature.
Download

Specifications

Model Signal output temperature range
Break circuit
Return difference Capillary tube length Sense of temperature limit Contact rating AC250V Working Temperature Protective level
HL-LD-3 SPDT 1.0~7.5℃ 4~6℃ 3m 80℃ resistive: 5A
sensibility: 3A
0~60℃ IP30
HL-LD-6 6m

APPLICATION

RELATED NEWS

News DDC Controller: How It Works in HVAC Systems
On October 25, 2026
DDC Controller: How It Works in HVAC Systems
A DDC controller helps HVAC systems maintain indoor comfort while keeping equipment operation under control. In commercial buildings, temperature swings, unnecessary equipment runtime, and constant manual adjustments can…
Learn More
News Motorized Valve: Types, Uses & FCU Selection Guide
On October 15, 2026
Motorized Valve: Types, Uses & FCU Selection Guide
When a room stays too warm even though the fan coil unit is running, the problem may not be the thermostat. Water flow through the coil could be…
Learn More
News CO₂ Sensor for HVAC: Demand Controlled Ventilation and Why Sensor Accuracy Matters
On September 22, 2026
CO₂ Sensor for HVAC: Demand Controlled Ventilation and Why Sensor Accuracy Matters
A CO₂ Sensor can help an HVAC system respond to changes in occupancy instead of running the same ventilation rate all day. Think about a meeting room that…
Learn More

We value your privacy

We use cookies to enhance your browsing experience, serve personalised ads or content, and analyse our traffic. By clicking "Accept All", you consent to our use of cookies.