BENDER LINETRAXX® CTUB100 series AC/DC sensitive measuring current transformers (type B)

Question 2: What are the special advantages of the P-type transformer core with magnetic shielding (CTBCxxP)? What are the key requirements to pay attention to during installation?

Answer: The special advantage of P-type iron core is its integrated full magnetic shielding, which is insensitive to load current and can withstand extremely high system peak load current and surge current. It is suitable for strong interference scenarios such as railway vehicles and high-power industrial equipment. Key installation requirements: ① All current carrying cables must pass through the center of the iron core completely, and it is strictly prohibited for protective conductors and low resistance conductor circuits to pass through the core; ② The minimum distance for conductor bending should be maintained (90 ° angle distance=2 x conductor outer diameter) to avoid the influence of conductor offset on measurement accuracy; ③ The connecting cables should be kept away from the iron core to prevent interference pulses, and star connections must be used for power supply to multiple devices. Chrysanthemum chains are prohibited; ④ The fixing screws should be selected according to the specifications (M5/M6), and the tightening torque should be strictly controlled at 0.6km (small size) or 1km (large size).

Question 3: How to set the measurement range of the CTUB100 series? What are the key points for matching the output signal characteristics with the evaluation equipment?

Answer: The measurement range is only supported by CTUB101/102 and can be set through potentiometers (CTUB105 fixed range 3). There are 3 options available, which should correspond to the I ∆ n response value of the evaluation device (e.g. I ∆ n ≤ 0.1A, select option 1). Output signal characteristics: The output terminals are S1 (k) and S2 (l), with a scaling ratio of 400mV/1A, a maximum output voltage of ± 10V, a maximum full-scale value of 8A, and an output resistance of 172 Ω. Matching points with evaluation equipment: ① Power supply matching: Select the corresponding electronic module (DC ± 12V/24V) according to the requirements of the evaluation equipment; ② Cable matching: Connect RCMA420/423 with CTX series cables, and connect RCMS4/EDS441-LAB with CTXS series cables, with a length not exceeding 10m; ③ Range matching: The measurement range must not be less than the I ∆ n response value of the evaluation equipment, otherwise it will reduce the measurement resolution; ④ Surge protection: Class 2 surge protectors must be installed upstream of the power supply to ensure compliance with regulatory requirements.