Failure of the electric heating system during winter？

In the cold season, electric heating systems have become a key guarantee for the antifreeze of pipelines and equipment in many industrial and commercial environments. However, with the increase of usage time or improper maintenance, electric heating systems may fail and affect normal operation. Understanding and identifying these signs of failure will help you take timely measures to avoid further losses. Huanrui is deeply involved in the field of electric heating and provides you with troubleshooting and solutions to ensure that the system remains stable and reliable in winter.
Fault sign 1: Circuit breaker tripping
1. Possible causes
The circuit breaker is too small, the power required by the circuit exceeds the circuit breaker, and the circuit breaker starts at a temperature lower than the designed starting temperature
Correction method
Recalculate and check the power required by the circuit, and select the circuit breaker (the power supply cable should also be selected)
2. Possible causes
Circuit breaker failure
Correction method
Repair the circuit breaker
3. Possible causes
The junction box or other accessories are short-circuited and the heating belt is mechanically damaged
Correction method
Determine the fault location, reinstall or replace, and use a megohmmeter to test the short circuit method as follows:
a. All wiring accessories are installed intact and the waterproof seal is damaged;
b. Whether the pipeline accessories have been repaired and damaged the heating belt;
c. Whether the insulation layer is damaged or crushed:
d. Isolate the heating belt of each section of the line and use a megohmmeter to test the fault location.
4. Possible causes
The two wires of the heating belt are mistakenly connected at the end. The insulation layer of the first and last sections of the heating belt shrinks thermally, and the conductor is short-circuited with the pipeline or shield.

Fault sign 2: System heat generation is approaching zero or is low
1. Possible cause
Power supply is approaching zero or is low
Correction method
Repair the power supply system
2. Possible cause
Some accessories are not connected or the heating belt is cut off
Correction method
Repair the accessories and heating belt
3. Possible cause
Some accessories have improper connections
Correction method
Adjust according to the operating requirements of the relevant accessories
4. Possible cause
The thermostat is incorrectly adjusted to the closed state
Correction method
Re-adjust the thermostat
5. Possible cause!
The pipeline is in a high temperature state and the heating belt is damaged. The heating belt has been exposed to excessively high ambient temperature and has been damaged
Correction method
Measure the pipeline temperature and recalculate the heat generation and replace or supplement the heating belt
Fault sign 3: System heat generation is normal and the temperature of a single pipeline is lower than the design value
1. Possible cause
The insulation layer is affected by moisture
Correction method
Replace the damp insulation layer with a dry one and add a waterproof cover
2. Possible cause
The heating belt is not enough or the selection is inappropriate
Correction method
Replace the missing heating belt with a two-way , but the total line length cannot exceed the limit
3. Possible causes
The thermostat controller is not adjusted correctly
Correction method
Re-adjust the thermostat controller
4. Possible causes
The parameters used in the heat loss calculation are inconsistent
Correction method
Recheck the design parameters and make necessary adjustments

Fault sign 4: The heating belt is not hot or one section is cold
1. Possible causes
Exceeding the service life, this situation is generally gradually weakened
Correction method
Choose heating belts produced by regular manufacturers with complete certifications, nameplates, qualified technical indicators, and clear production dates
2. Possible causes
a. No insulation b. The insulation layer is too thin or uneven in thickness; c. The insulation layer is not waterproofed. When the insulation layer is soaked in rain and snow, the heating belt part is in a low temperature or humid state for a long time and works with a large output power. One is not energy-saving, and the other is uneven in attenuation rate
Correction method
Install strictly according to the product instructions. The waterproof layer should be well prepared along the entire insulation layer to make the heating belt work in a dry state

Fault sign 5: Circuit breaker tripping
1. Possible causes
Low temperature power transmission tripping: Excessive length, causing overload tripping. The maximum use length is restricted by the size of the product's conductive core cross-section, the nominal power size, the ambient temperature at startup, or the temperature of the heating system.
Correction method
Perform preliminary thermal or electrical design according to the design book, and install according to the number of installations or precautions.
2. Possible causes
Short circuit tripping: The two wires at the end are twisted to produce a short circuit; the contact is not well insulated or the middle insulation layer is damaged. If it is normal during the first use but a short circuit occurs in the middle, it is generally caused by the following reasons: a. The insulation layer at the head and tail ends shrinks, exposing the conductive part; b. Use absorbent insulating tape; c. The product insulation layer has a hidden danger of damage or the insulation layer added at the contact during installation is not waterproof; therefore, when a, b, and c are in a humid state, a short circuit will occur.
Correction method
Correction according to the specifications and precautions for the corresponding accident causes.
3. Possible causes
Contact or middle burnout tripping: The circuit is not equipped with leakage protection, the product selection is incorrect, and the overcurrent protection function is not installed with a leakage short circuit device of corresponding capacity and a fuse line of limited overload protection. When the above When 1 and 2 occur, the heating belt will burn out, causing various accidents.
Correction method
Any line must be equipped with leakage protection and overcurrent protection devices, and the product type must be shielded or shielded reinforced.
Fault sign six: The heating belt is used beyond the warranty period, the thawing time is extended or the ambient temperature is too low, and the antifreeze effect is poor.
1. Possible causes
·Wrong product selection or low technical parameters
Correction method
·Strictly follow the design plan and instructions for system design and product selection
2. Possible causes
The insulation layer is too thin or not waterproofed, so that the heating belt works at low temperature and high power output for a long time, causing accelerated attenuation
Correction method
·Thicken the insulation layer (30-50mm, the thicker the better) and do a good job of waterproofing, so that the heating belt works in a dry state
3. Possible causes
Under low temperature conditions, frequent switching times cause excessive attenuation rate
Correction method
Choose brand-name high-quality heating products
The effective operation of the electric heating system is directly related to the normal operation of the facility and the service life of the equipment. In the face of any signs of failure, Huanrui is always by your side, providing professional services to help you restore the system to normal operation. Whether it is daily maintenance or emergencies, Huanrui will provide you with reliable solutions so that the electric heating system will continue to protect you in winter.