SR745-W2-P1-G1-HI-A-L-R | GE Transformer Protection Relay

GE SR745-W2-P1-G1-HI-A-L-R is a transformer protection relay from GE Multilin

· Analog input: It can be connected to various sensor signals, such as signals used to measure parameters such as voltage and current of transformers. It can generally receive standard 

industrial signals such as 0-5V, 0-10V, 4-20mA, etc.

· Digital input: It can receive external switch signals, such as circuit breaker status, knife switch position, etc. It is usually a dry contact or active contact input, and the input voltage range is 

generally between 12V-250V DC/AC.

· Relay output: There are usually multiple independent relay outputs with a contact capacity of generally 5A-10A, which can be used to control circuit breaker tripping, alarm signal output, etc.

· Communication output: It has multiple communication interfaces, such as Ethernet interface, RS232 interface, RS485/RS422 interface, etc., which can easily communicate with the upper 

computer, monitoring system or other intelligent devices.

· Overload protection: Different overload current and time settings can be set. Generally, the overload current setting can be continuously adjusted within the range of 0.5-10 times the rated 

current, and the time setting can be set within the range of 0.1s-60s.

· Overexcitation protection: The overexcitation multiple and action time can be set according to the rated voltage, frequency and other parameters of the transformer. The overexcitation 

multiple can generally be set within the range of 1.05 times to 1.5 times, and the action time is between 0.1s-10s.

· Harmonic protection: It can monitor the harmonic components in transformer current and voltage, and set the fixed values of single harmonic content and total harmonic content, as well as 

the corresponding action time. Generally, the fixed value of single harmonic content can be set between 1% -30%, the fixed value of total harmonic content can be set between 3% -50%, 

and the action time is between 0.1s and 5s.

· Measurement accuracy: The measurement accuracy of parameters such as voltage, current, and power can generally reach 0.5% -1%, and the frequency measurement accuracy can 

reach 0.01Hz-0.1Hz.

·Display function: Equipped with an enhanced 40 character display screen, it can display the operating parameters, protection settings, fault information, etc. of the transformer in real time, 

and can also set and modify parameters and settings through the display screen.

· Power supply voltage: generally supports a wide voltage input range of 85V-264V AC or 100V-300V DC to adapt to different on-site power supply conditions.

· Power consumption: During normal operation, the power consumption is generally between 10W-30W, depending on the working state of the relay and the load situation.