BWR-04 Series Transformer Winding Temperature Indicator

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BWR-04 Series Transformer Winding Temperature Indicator

Product ID：CLWDwdj029

Price: Please inquire PDF Format

Supply Ability:500 SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberBWR-04

Brand NameHZHUALI

Payment TermsTT，PAYPAL，Alibaba.com Pay

BWR-04 Series Transformer Winding Temperature Indicator
Professional Transformer Temperature Monitoring System for Oil-Immersed Transformers
The BWR-04 Series Transformer Winding Temperature Indicator is a highly reliable transformer temperature monitoring system specifically designed for oil-immersed power transformers. Utilizing advanced transformer thermal simulation measurement technology, this transformer winding temperature indicator accurately reflects the actual operating temperature of transformer windings and provides essential protection against overheating.
As a professional transformer winding temperature monitor, the BWR-04 calculates winding temperature by combining the transformer top oil temperature with the winding temperature rise generated by load current. This thermal simulation method ensures accurate and stable temperature monitoring, making the BWR-04 an ideal transformer thermal monitoring device for substations, power plants, and industrial electrical systems.
The transformer winding temperature indicator can provide up to six independent switching contacts for cooling system control, over-temperature alarms, and trip protection. It also supports Pt100 and 4-20mA outputs for seamless integration into modern transformer temperature monitoring systems and SCADA platforms.

Key Features of the BWR-04 Transformer Winding Temperature Indicator
•Advanced thermal simulation technology for accurate winding temperature measurement
•Professional transformer temperature monitoring system for oil-immersed transformers
•Up to six switching contacts for alarm, trip, and transformer cooling fan control
•Reliable transformer overheat protection device for critical power equipment
•Supports Pt100 resistance output and 4-20mA current output
•High-accuracy transformer winding temperature monitor
•IP55 protection rating for harsh industrial environments
•Adjustable temperature control settings
•Suitable for transformer condition monitoring and predictive maintenance
•Compatible with digital temperature displays and automation systems

How the Transformer Winding Temperature Indicator Works
The BWR-04 Transformer Winding Temperature Indicator operates based on the thermal simulation principle.
The winding temperature (T1) is calculated as:
T1 = T2 + ΔT
Where:
•T1 = Transformer winding temperature
•T2 = Transformer top oil temperature
•ΔT = Winding temperature rise above oil temperatureThe load current measured by the current transformer (CT) is proportional to the winding current. This current passes through a converter and an embedded heating element inside the indicator. The generated heat simulates the actual temperature rise of the transformer winding.
Through this thermal simulation process, the transformer winding temperature indicator provides a highly accurate representation of winding temperature, making it an essential transformer thermal monitoring device for safe transformer operation.

Technical Specifications
BWR-04 Winding Temperature Indicator

Parameter	Specification
Operating Temperature	-40°C to +60°C
Relative Humidity	≤95%
Measurement Range	0-150°C (Customizable)
Accuracy Class	1.5
Setpoint Accuracy	±2°C
Switching Differential	6 ±2°C
Contact Rating	AC250V/15A, DC250V/3A
Standard Setpoints	K1=55°C, K2=75°C, K3=90°C, K4=130°C
Input Current	0.6A-5A
Protection Class	IP55
Output Signals	Pt100, DC 4-20mA
Installation	Panel Mounted

XMT-288FC Digital Temperature Display

Parameter	Specification
Operating Temperature	-10°C to +55°C
Measurement Range	0-150°C
Input Signal	Pt100, DC 4-20mA
Accuracy Class	1.0
Resolution	0.1°C
Control Mode	Upper Limit Contact
Contact Capacity	AC250V, 3A
Output Signal	4-20mA, 0-5V, RS232, RS485
Power Supply	AC/DC 100-260V
Frequency	50-60Hz
Panel Cutout	152 × 76 mm
Overall Dimensions	160 × 80 × 135 mm

Applications
The BWR-04 Transformer Winding Temperature Indicator is widely used in:
•Oil-immersed power transformers
•Electrical substations
•Utility transformer monitoring systems
•Transformer protection systems
•Transformer condition monitoring projects
•Industrial power distribution systems
•Renewable energy substations
•Smart grid transformer installations
•Transformer cooling fan control systems
•High-voltage electrical equipment

Benefits of Using a Transformer Winding Temperature Indicator
Implementing a professional transformer winding temperature indicator provides several advantages:
•Improved transformer reliability
•Enhanced transformer temperature monitoring
•Early detection of abnormal temperature rise
•Effective transformer overheat protection
•Reduced maintenance costs
•Extended transformer service life
•Better transformer condition monitoring
•Increased operational safety
•Improved cooling fan control efficiency

Why Choose BWR-04 Transformer Temperature Monitoring System
The BWR-04 is more than a standard temperature gauge. It is a complete transformer temperature monitoring system designed to provide accurate temperature indication, cooling control, alarm management, and trip protection.
With its thermal simulation technology, multiple switching contacts, Pt100 output, and 4-20mA communication capability, this transformer winding temperature monitor offers reliable performance for critical power infrastructure.
Whether used in power plants, substations, or industrial facilities, the BWR-04 serves as a dependable transformer thermal monitoring device and transformer overheat protection device.

Frequently Asked Questions

What is a Transformer Winding Temperature Indicator?
A transformer winding temperature indicator is a device used to monitor the temperature of transformer windings through thermal simulation technology, ensuring safe transformer operation.
Why is transformer winding temperature monitoring important?
Accurate transformer temperature monitoring helps prevent overheating, insulation degradation, and unexpected transformer failures.
Does the BWR-04 support transformer cooling fan control?
Yes. The BWR-04 provides multiple switching contacts for automatic transformer cooling fan control, alarm activation, and trip protection.
What output signals are available?
The transformer winding temperature indicator supports Pt100 resistance output and 4-20mA current output for integration with monitoring systems.
Can the BWR-04 be connected to SCADA systems?
Yes. Through its Pt100 and 4-20mA outputs, the BWR-04 can easily integrate into SCADA, DCS, and other transformer temperature monitoring systems.
What industries commonly use transformer winding temperature monitors?
Power generation, electrical substations, utilities, renewable energy plants, industrial facilities, and smart grid applications commonly use transformer winding temperature monitors.

Introduction:
The transformer winding temperature indicator (hereinafter referred to as the winding temperature indicator) is specifically designed for oil-immersed power transformers, which can indirectly measure the winding temperature using the "thermal simulation" method. Let T1 represent the temperature of the transformer winding, which is T2 and △ T, i.e. T1=T2+△ T, where T2 is the upper oil temperature of the transformer, △ T is the increase in winding temperature relative to oil temperature. This △ T depends on the winding current and the current of the secondary current transformer (CT) being proportional to the winding current. The working principle of the temperature indicator is as follows: the current and load of the current transformer are first adjusted through a converter, and then flow through the embedded heating element in the elastic component; The heat generated by the heating element causes the displacement of additional elastic components, resulting in a temperature indication value higher than the oil temperature. In this way, the temperature indicator can obtain the average indicated winding temperature. When indicating the temperature of the transformer winding, the BWR-04 series winding temperature indicator light can provide up to six sets of switches (AC250V/15A) for control, overheating alarm, and tripping of the transformer cooling system; This instrument can output (4-20) mA passive current signal (or active (4-20) mA, Pt100 platinum resistance signal) as the input signal for the digital display thermometer in the control cabin.