Conventional current transformers
have high insulation requirements, large size, heavy weight and high price;
small dynamic range, saturation of transformers; easy generation of
ferromagnetic resonance; inconvenient installation and maintenance of
equipment. With the continuous advancement of digital substations and smart grids,
electronic current transformers are becoming more and more widely used.
ECT
electronic current transformer is based on the research and development
experience of our company for many years, combined with modern sensor
technology and electronic technology research and development, using LPCT low
power coil principle, small signal output without secondary conversion, direct
access to the second As a substitute for traditional electromagnetic current
transformers, the equipment can be widely used in three-phase bushings of
on-column switches, ring network switchgear and on-column switches for
metering, measuring and measurement of three-phase current and zero-sequence
current. protection.
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Technical parameters
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Work conditions
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Rated primary voltage: 10kV and below;
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Ambient temperature: -40 ° C - +70 ° C
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Rated frequency: 50Hz or 60Hz;
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Daily average temperature: ≤40°C
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Rated primary current: 25~3000A;
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Altitude: ≤3000m
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Rated secondary analog voltage output:
measurement: 1V
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Atmospheric conditions: no serious
pollution in the atmosphere
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Zero sequence current: 20A: 0.2V
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Accuracy: measure 0.5S level, protect
level 1 and 5P10 level.
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Rated load: ≥20kΩ
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The principle of low power coil is as
follows:
Current to voltage converter consist of a
small Iron core and low loss electronics
Features:
easy to curry because its small iron core: wide
frequency response range, wide measuring range, good linearity, strong
anti interference ability, small size and light weight;
Insulating material used is epoxy resin casting
which is safe, environment friendly,
maintenance-free;
Combined transformer has Simultaneous
measurement of three-phase current and zero-sequence current, protection signal
sampling, simplifying system structure and reducing error sources;
Aanalog voltage signal output: It can meet the
needs of secondary equipment such as metering, measurement and protection.
Dimensions
MP-ECT135/83-10
