Instrument voltage transformers (VT) NMTSM are designed to transmit measurement information signals to measuring instruments, protective devices, automation, signaling and control in voltage networks from 3.3 to 42 kV AC with a frequency of 50 or 60 Hz and.
NMTSM voltage measuring transformers are designed for outdoor installation. The advantage of this series of transformers is the long creepage distance (up to 31 mm/kV), which allows these transformers to be used in the most polluted places.
According to the principle of operation, they are inductive, single-phase, single-pole, grounded. Voltage transformers (VT) have a cast housing made on the basis of an epoxy compound. The insulation material of voltage transformers has excellent arc, ozone and ultraviolet protection characteristics, while it has high mechanical strength, so that the transformers can work for more than 30 years without any maintenance. The creepage distance and discharge distance of NMTSM voltage transformers are designed for high levels of air pollution.
Additionally, measuring voltage transformers, at the request of the customer, can be equipped with a ferroresonance protection device.
ADVANTAGES OF VOLTAGE MEASURING TRANSFORMERS WITH CAST RESIN
Voltage transformers (VT) of the NMTSM series were developed for operation at transformer substations, at traction substations of railways, hard-to-reach objects where equipment maintenance is not required, at enterprises with high pollution of electrical equipment.
Transformers meet the requirements of IEC, ANSI, IEEE, GOST standards.
Measuring voltage transformers NMTSM are a good alternative to obsolete and obsolete current transformers with oil insulation.