Measuring voltage transformers DNT SM are intended for transmission of measurement information signals to measuring instruments, protective devices, automation, signaling and control in voltage networks from 3.3 to 42 kV AC, industrial frequency 50 or 60 Hz.
Measuring voltage transformers (VT) of the DNT SM series are designed for outdoor installation.
According to the principle of operation, they are inductive, single-phase, two-pole, not 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 DNT SM 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 CAST RESIN VOLTAGE INSTRUMENT TRANSFORMERS
Voltage transformers (VT) of the DNT SM series were developed for operation at transformer substations, at traction substations of railways, at hard-to-reach sites where equipment maintenance is not required, at enterprises with high pollution of electrical equipment. These transformers are widely used as auxiliary transformers (TSN) for supplying circuit breaker drives, reclosers, disconnectors and other consumers.
Transformers meet the requirements of IEC, ANSI, IEEE, GOST standards.
Measuring voltage transformers DNT SM are a good alternative to obsolete and obsolete current transformers with oil insulation.