The NX7-R bsr-3-480-63.1 from em test is a Coupling Decoupling Network with Frequency 50 to 60 Hz, Operating Voltage 85 to 264 VAC, Burst Voltage 5.5 kV, Surge Voltage 7 kV, Ringwave Voltage 7 kV. More details for NX7-R bsr-3-480-63.1 can be seen below.