MSQ Series Industrial Metering 110V Output 0.5 Class Accuracy Low Voltage LV Distribution 220KV Input Current Transformer

Class 0.5 MSQ Series high accuracy low voltage toroidal current transformer Model: MSQ-40-200/5-CL0.5 Selection of the Current Transformer To select the current transformer correctly, the following points should be clarified: - The application (for measuring or protection). - The features of the working environment (Indoor or outdoor, operating temperature, air humidity etc….). - Operation voltage and frequency. - Range of the primary current (maximum and minimum of the current to be measured). - Dimension of the cable or Bus bar. - Data of the overload. - Short circuit current. - Specification of the measuring device associated with the current transformer (Accuracy, rated current, consumption etc…). - The diameter and length of the cable, the cable which is used to connect the current transformer and associated measuring device. Power Losses of the CT In the practical application, the power generated by the primary current should be equal or bigger than the power requirement of the associated measuring device plus the consumption of the connecting line. Losses in the line, PL: This is the power loss, through heat, generated by current through the resistance RL in the cable, in the transformer’s secondary circuit. Factors to be taken into account: Secondary current: PL = RL / 2 Cable diameter: RL is inversely proportional to the square of the diameter cable length: RL is proportional to the length of cabling (there and back). Power: The nominal apparent power (VA) with a specified power factor, which was supplied by the Current Transformer, to the secondary current with the assigned current when it is connected to its nominal load. Sc (VA) = Zc (/sn)2 According to Standards, for apparent power greater than or equal to 5VA, the power factor is 0.8 inductive. For apparent power less than 5VA the power factor is considered to be one (unity). Specifications Current Ratio..................................................................................200/5A Accuracy.........................................................................................Class 0.5 Burden.............................................................................................See Selection Form. Security Factor................................................................................FS<5 Max System Voltage.......................................................................720V AC Test Voltage.....................................................................................3kV AC. (1 min.) Frequency........................................................................................50/60Hz Rated Short-time Thermal Current (Ith)........................................Ith = 60 X In Rated Dynamic Current (Idyn).......................................................Idyn = 2.5 X Ith Continuous Overload.....................................................................1.2 X In Working Temperature....................................................................-25°C ~ +50°C insulation Rating.............................................................................Class B Housing Self-extinguishing Class.................................................VO Bus-bar Support Mounting.............................................................Provided Panel Mounting................................................................................Provided Hinged Sealable Terminal Cover....................................................Provided Standards.........................................................................................IEC/EN60044-1, VDE0414-44-1, BS3938, BS7626 Selection Form Item Current Ratio Rated Burden (VA) Case Qty. Model (A) Class: 0.5 Class: 1.0 (Pcs) MSQ-40 100/5 1.5 1.5 MSQ-40 150/5 1.5 2.5 MSQ-40 200/5 2.5 MSQ-40 250/5 MSQ-40 300/5 MSQ-40 400/5 MSQ-40 500/5 Note: Class and VA rating must be mentioned when ordering. Dimension Company Profile Yueqing Yomin Electric Co., Ltd (Before called Yueqing Yomin Electric Factory, found in 1996) is a manufacturer of electric appliances with well-equipped testing equipment and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in electrical industry and other industries. Our products are widely recognized and trusted by users and can meet continuously developing economic and social needs. We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success! WORKSHOP SHOW APPLICATION BACK HOME PAGE Class 0.5 MSQ Series high accuracy low voltage toroidal current transformer