Surge Arrestor 40kA, 1-4 Pole, 275V/385V | Onesto SPD Poles:4P Reducing from a larger PE

Reducing from a larger PE main line to a smaller branch line

Thanks to Speck's patented design there is no visible beam of light in the pool - instead the whole pool is illuminated equally

Matched borehole motor control

Confirm the breaker will be installed in a suitable enclosure rated for the 800H frame size

Available in a wide range of pipe and thread size combinations — select the required variant

Surge Arrestor 40kA, 1-4 Pole, 275V/385V | Onesto SPD Poles:4P Reducing from a larger PEThe Onesto BY7 40 Surge Protection Device is a Class II (Type 2) surge arrestor rated at 40kA, designed to protect electrical installations, distribution boards and connected equipment from transient overvoltage caused by lightning strikes and switching surges. It is suitable for domestic, commercial and light industrial TN and TT power supply networks, and offers a visual pass fail status indicator so installers and maintenance teams can check