Current Transformers must convert high transmission line currents (up to 5000 A) to standardized low and easily measurable values, which will be used for metering, protection and control of the high voltage system. As such, the need for accurate and reliable current transformation is essential. LMZ can supply Tank Type, Inverted Type and Bushing Type Oil-Paper Insulated Current Transformers up to 550 kV to reducing the line Current to small magnitudes.
♦ Types: Bushing type, Inverted type, Tank type
♦ Rated voltage: up to 550 kV
♦ Rated continuous current: up to 5000 A
Voltage Transformers must convert transmission class voltages to standardized low and easily measurable values, which will be used for metering, protection and control of the high voltage system. As such, the need for accurate and reliable voltage transformation is essential.
♦ Capacitive Voltage Transformers (CVTs)
(CVTs) have been widely used within transmission power systems for applications ranging from high-voltage to ultra high-voltage. CVTs are primarily used for voltage measurement, providing voltage signals to metering units, protection relay devices, and automatic control devices. Additionally, Capacitor Voltage Transformers serve as a coupling capacitor for coupling high frequency power line carrier signals to the transmission line.
♦ Inductive Voltage Transformers (IVT)
(IVT), are used for voltage metering and protection in high voltage network systems. They transform the high voltage into low voltage adequate to be processed in measuring and protection instruments secondary equipment, such as relays and recorders).