Three Phase Current Transformer for Motor Protection

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Three Phase Current Transformer for Motor Protection

A three-phase current transformer is an electrical device used to accurately measure, monitor, and protect three-phase power systems. It converts high current levels from each phase into smaller, manageable values suitable for metering instruments and protective relays. By providing electrical isolation between the high-voltage power circuit and measuring equipment, it ensures safety and reliability. Three-phase CTs are commonly used in power distribution, industrial automation, and energy management systems to detect overloads, faults, and unbalanced loads. With high accuracy and stability, they play a vital role in efficient power monitoring and maintaining optimal performance of electrical networks.

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Main Characteristics

Product Features

* Wide overload and excellent consistent.

* Different input current can be converted into a unified standard value ,which is convenient for signal acquisition.

* Various installation methods, optional PCB installation and bolt fixing methods.

* Various shape structures are available .

Product Application
Three-phase current transformers are widely used in power distribution systems, industrial control panels, energy management systems, and smart grids. They play a key role in monitoring load currents, detecting faults, improving energy efficiency, and ensuring safety in both commercial and industrial power networks.

Product Parameters

Electrical performance

Operation Temperature

-25℃～+55℃/- 40℃~～+85℃ optional

Relative Humidity

≤90%hPa

Internal Insulation

Epoxy resin

Insulation Resistance

＞500 M Ω/500V DC

Medium Strength

2500V AC/1min

Withstand Impulse Voltage

5000V（1.2/50μs

Standard Lightning Wave）

Operation Frequency

50～400Hz

Accuracy Class

According to

（IEC 61869-2) or

（GB 20840.2-2014）

accuracy 0.5，1.0 class

Environmental Friendly

According to the requirement of RoHS

Certification

According to CE

Model Definitions

Three Phase Current Transformer

Typical Value of Products

Type	Rated Input(AC) Input Current/ Output Voltage	Accuracy Class	OverLoad Time(s)	Duration Time(s)	Applicable Motor Power(kW)	Dimension(s)	Installation Method
TR0161B	2A/0.11V,0.1765V,0.353V 5A/0.11V,0.1765V,0.353V 6.3A/0.11V,0.1765V,0.353V 10A/0.11V,0.1765V,0.353V	0.5 Class	10	2	≤22	L-W-H-ID 100-28-39-10	Screw fixation
TR0159B	10A/0.11V,0.1765V,0.353V 40A/0.11V,0.1765V,0.353V 80A/0.11V,0.1765V,0.353V 100A/0.11V,0.1765V,0.353V	0.5 Class	10	2	12.5~50	L-W-H-ID 120-50-56-20	Screw fixation
TR0160B	6.3A/0.11V,0.1765V,0.353V 10A/0.11V,0.1765V,0.353V 63A/0.11V,0.1765V,0.353V 100A/0.11V,0.1765V,0.353V	0.5 Class	10	2	≤110	L-W-H-ID 158-34-62-20	Screw fixation
TR0180B	100A/0.11V,0.1765V,0.353V 120A/0.11V,0.1765V,0.353V 200A/0.11V,0.1765V,0.353V 300A/0.11V,0.1765V,0.353	0.5 Class	10	2	50~160	L-W-H-ID 196-38-74-30	Screw fixation
TR01123B	6.3A/0.11V,0.1765V,0.353V 10A/0.11V,0.1765V,0.353V 63A/0.11V,0.1765V,0.353V 100A/0.11V,0.1765V,0.353V	0.5 Class	10	2	≤75	L-W-H-ID 50-90-110-18	Standard rail snap or screw fixation
TR0198-1B	6.3A/0.11V,0.1765V,0.353V 10A/0.11V,0.1765V,0.353V 63A/0.11V,0.1765V,0.353V 100A/0.11V,0.1765V,0.353V	0.5 Class	10	2	≤75	L-W-H-ID 94-53-92-20	Standard rail snap or screw fixation
TR0199B	100A/0.11V,0.1765V,0.353V 120A/0.11V,0.1765V,0.353V 200A/0.11V,0.1765V,0.353V 300A/0.11V,0.1765V,0.353V	0.5 Class	10	2	50~160	L-W-H-ID 111-79.5-99-30	Standard rail snap or screw fixation
TR01103B	120A/0.11V,0.1765V,0.353V 200A/0.11V,0.1765V,0.353V 300A/0.11V,0.1765V,0.353V 400A/0.11V,0.1765V,0.353V	0.5 Class	10	2	50~220	L-W-H-ID 184-65-78-40	Screw fixation