This Shelly's 120A current transformer product version is an accessory to Shelly PRO 3EM 3-phase power meter.
Typical use is to connect it to Pro 3EM for measurement of Neutral wire.
Note: Not compatibe with Shelly 3EM or Shelly EM.
Internal diameter: 11mm
Accuracy: 1%
Rated primary Current: 120A
Rated secondary current: 40mA