Current transformers of the type TOL-12, TPL-12 are designed for the scale conversion of the AC power for the purpose of its further measurement and (or) transmission to protection, automation, signaling and control devices in 50 Hz AC circuits per class voltage of 6-10 kV. The range of rated primary currents is 5-1000A, the rated secondary current is 5A, the number of secondary windings is up to 4x, the rated secondary loads with the power factor cosφ = 0.8-10VA for measurement, 15VA for protection. Accuracy classes for measuring windings - 0,2S - 5P; for winding protection - 5P - 10P. 

Current transformers oil-filled series TFZM are designed for transmitting the measurement information signal to measuring, protection, automation, signaling and control devices in 50 Hz or 60 Hz alternating current electric circuits. They are produced for nominal primary current from 15 to 2000 A, secondary - 1; 5 A. External insulation of transformers - porcelain cover. The main internal insulation of transformers is polymer. The windings of the transformer are of the link type. The number of secondary windings from two to five, of which up to 2 measuring windings and up to 4 windings of protection. The accuracy class of the measuring winding is from 0.2S to 0.5; winding protection 10P. The coefficient of ultimate accuracy of the windings of the protection is 20. The coefficient of safety of the devices is 10. 

Gas-insulated measuring current transformers with SF6  insulation are designed for use in AC electrical circuits with a frequency of 50 or 60 Hz in order to transmit the measurement information signal to measuring, protection, automation, alarm and control devices. Transformers are filled with SF6 gas and have a pressure control device with a signaling device. Upon customer's request, it can be supplemented with an SF6 gas density sensor with a high and low level alarm.