Shanghai Huabang Industrial Business Network - DC current transformer

[DC current transformer]LS series Rogowski coil

2026-6-15 20:47:37

I. Overview
Rogowski coil, also known as current measurement coil or differential current sensor, is a circular coil uniformly wound around a non-magnetic material. The output signal is the derivative of current over time. By integrating the output voltage signal through a circuit, the input current can be accurately restored.

II Structure Introduction:
No ferromagnetic material, no hysteresis effect, almost zero phase error; No magnetic saturation phenomenon, therefore the measurement range can range from several amperes to several hundred kiloamperes of current; The structure is simple and there is no direct circuit connection between it and the measured current; The response bandwidth is 0.1Hz-1MHz. Compared with traditional transformers with iron cores, Rockwell coils have a wide measurement range, high accuracy, stability and reliability, response frequency bandwidth, as well as measurement and relay protection functions. They are small in size, light in weight, safe, and meet environmental requirements.
Based on the Rockwell coil, it has the characteristics of real-time current measurement, fast response speed, no saturation, and almost no phase error. Therefore, it can be applied to relay protection, thyristor rectification, variable frequency speed regulation, resistance welding and other occasions with severe signal distortion.

3�� Electrical parameters:
Input: 5A~100KA
Output: 0-20mA, 0-5V, 0-10V (customer defined)
Grade: 0.5-1%

model	input current	output current		level	Coil length	remark
model	input current	integrator	Direct output	level	Coil length	remark
LS-8200A	200A	0��20mA 0��5V 0��10V	20mV	one	0.4M Or 3M	The integrator output requires a 24V power supply For passive Direct output
LS-8500A	500A	0��20mA 0��5V 0��10V	50mV
LS-81000A	1000A	0��20mA 0��5V 0��10V	1V
LS-82000A	2000A	0��20mA 0��5V 0��10V	2V
LS-83000A	3000A	0��20mA 0��5V 0��10V	3V
LS-84000A	4000A	0��20mA 0��5V 0��10V	4V
LS-85000A	5000A	0��20mA 0��5V 0��10V	5V
LS-810KA	10000A	0��20mA 0��5V 0��10V	10V
LS-820KA	20000A	0��20mA 0��5V 0��10V	20V
LS-830KA	30000A	0��20mA 0��5V 0��10V	30V
LS-850KA	50000A	0��20mA 0��5V 0��10V	50V

LS series Rogowski coil

[DC current transformer]SDC series DC high current transformer

2026-6-15 20:47:29

One
Overview: SDC series DC high current transformers use Hall direct measurement method to detect DC or pulsating current. It has the characteristics of accurate measurement, stable and reliable, easy installation, small temperature drift, strong resistance to external magnetic fields, and strong overload capacity. Widely used in high current applications such as non-ferrous metal smelting, electrolysis, electroplating, chlor alkali, carbon, rectification, etc.

2�� Working principle:
The conductive busbar passes through the iron core of the transformer, and the measured busbar current I generates a magnetic field B proportional to it in the iron core. The Hall element installed in the air gap of the iron core detects the magnetic field B and outputs a Hall voltage proportional to the magnetic field B. The sum and amplification of the Hall voltages output by each Hall element is the output voltage V of the sensor, and the value of V accurately reflects the value of the measured busbar current I.

3�� Technical parameters of SDC series DC high current transformer:
Measurement range: 4KA to 400KA
Accuracy: 0.1% FS 0.2% FS 0.5% FS
Output signal: 5V (10V 20mA 4-20mA or according to user requirements)
Position influence error<0.05%
Repeated loading and unloading error<0.05%
External magnetic field influence: When the external magnetic field is not greater than 200 Gauss, the additional error of the external magnetic field on the sensor is less than 0.05%
Temperature drift:<50ppm/��
Working conditions:
Environmental temperature -20 ��~+60 ��
Relative humidity<85% RH
Power supply: AC220V ± 10% 50Hz ± 2Hz
Power consumption:<10VA (typical value)

[DC current transformer]BLZ-1K series DC transformer

2026-6-15 20:47:20

BLZ-1K DC Transformer

BLZ-1K series DC transformer