Why is transformer oil level temperature monitoring the first line of defense against equipment accidents?

• Core Products: Contains BWY Series oil level thermometer with BWR Series of winding temperature indicators designed for 10kV-500kV transformers.
• Monitoring function: real-time temperature display, support 2-6 groups of adjustable electrical contacts to realize alarm and trip,Cooling FansAutomatic start-stop control.
• System protection: through the connection with the Gas Relay respond in singing pressure relief valve Linkage to build a complete non-electricity protection barrier.
• Signal remote transmission: support Pt100 platinum resistance, 4-20mA standard current signal and RS485 digital communication, suitable for modern power monitoring system.

Why accurate temperature indication is key to prolonging the life of a transformer?

The insulation life of a transformer depends mainly on the operating temperature of the windings. According to the “six degree law”, every 6°C increase in winding temperature, the insulation aging speed will be doubled.BWY series oil surface temperature controller (such as the classic model BWY-802, BWY-803A) adopts the advanced temperature packet sensing technology, through the high-precision stainless steel capillary tube will be the top layer of the real-time transmission of the temperature of the oil to the display instrument.

InnoTD products are designed to be highly accurate, with a basic error level of 1.5 or less. This means that under extreme load conditions, O&M personnel can still obtain true and reliable temperature readings, so that the cooling system can be switched on manually or automatically in time to avoid irreversible damage to the insulation due to localized overheating.

How does the BWR Series Winding Temperature Indicator simulate the “hottest spot” inside the transformer?

The oil surface temperature often has a hysteresis and does not fully reflect the real load condition of the transformer coil. the BWR-04J and BWR-06J series of winding thermometers introduce thermal simulation, which is not only a physical temperature measurement, but also a complex energy calculation process.

1. Signal Acquisition: A current transformer (CT) on the transformer bushing collects the load current signal.
2. Heat Conversion: The current matcher draws secondary current to the electric heating element inside the thermostat.
3. Temperature overlay: The temperature rise generated by the electric heating element is added to the base oil temperature to drive the meter pointer to the true temperature value of the winding.

This technology ensures that the protection action is ahead of schedule. When a transformer is suddenly overloaded, the BWR series is able to capture the point of risk much earlier than an oil level thermometer and quickly triggers an alarm contact, gaining valuable reaction time for grid scheduling and dispatching.

BWY/BWR Series Transformer Temperature Indicator Core Technical Specification Table

How to choose the right thermostat specifications for different operating environments?

Not all transformer temperature indicators are suitable for global environments. When selecting a model, engineers need to consider the following three core elements:

• Climate adaptation: For the high humidity in the south or coastal salt spray environment, must be equipped with the TH (Humid Tropics) Protect the model number of the marking to prevent oxidation of the contacts and fogging of the meter dial.
• Seismic requirements: In the frequent vibration or large transformer body, the meter should have internal oil-filled shockproof structure, to ensure that the escort pointer in the violent vibration is still stable readings.
• Smart Connections: If the project belongs to intelligent power station or unattended substation, the model with integrated RS485 interface or 4-20mA analog output should be preferred to facilitate access to SCADA dispatching system.

Full range of non-power protection: thermostat,Gas Relaytogether withpressure relief valvelinkage logic

Transformer safety is a systematic project. InnoTD recommends that the user connects the BWY/BWR thermostat to the BWY/BWR thermostat. Gas Relay up to pressure relief valve Constitutes synergistic protection:

When there is a weak discharge or oil leakage inside the transformer, the gas relay is preferred to act and alarm; if the fault leads to a sharp increase in temperature, the thermostat will immediately cut off the power supply (trip) through the electrical contacts; if the temperature rise triggers the rapid expansion of the oil volume leading to pressure overruns, the pressure release valve will open to relieve the pressure. This triple linkage mechanism is the most effective means to ensure that no physical destruction of power transformers occurs.

Why Inotonda is your preferred transformer parts manufacturer?

As a professional supplier in the field of power monitoring and control, Inotera not only provides highly reliable BWY/BWR series of transformer temperature indicators, but also provides full life-cycle technical support. Our thermostats are strictly calibrated before leaving the factory to ensure that they are at the top of the industry at the end of the day.

We have a wealth of international experience in supplying products in accordance with IEC standards and support global sourcing and fast response times. If you are looking for a more accurate temperature management solution for large oil-immersed transformers, INNOTEC is definitely your reliable partner.