The 513 rectangular series residual current transformer is mainly used in low-voltage distribution cabinets such as 380V and 660V to continuously detect and monitor the residual current at the installation node of the corresponding circuit.The shell of this series of products is made of environmentally friendly flame-retardant ABS engineering plastics, or flame-retardant PC/ABS combined materials, high magnetic conductivity nanocrystalline soft magnetic materials, and epoxy resin packaging technology. It has the characteristics of high precision, good balance characteristics, small size, high insulation strength, strong impact resistance, and easy installation. It can work reliably and stably in indoor environments. Under special design, it can also work reliably in harsh outdoor environments.
The 513 rectangular series includes 5 specifications, which are suitable for circuits with a total busbar width of less than 300mm, and can basically meet the detection of all residual currents in distribution circuits below 1000A.
This series of products adopts the most optimized magnetic circuit design, sets the coil winding process according to the magnetic circuit characteristics, and combines a compact shielding structure, so that the product meets the requirements of product accuracy, sensitivity, balance characteristics, etc. under the premise of small size. And it is produced by epoxy resin encapsulation process, with good overall performance and excellent insulation performance. Even when installed in a very compact environment, it will not affect the existing insulation gap.
When larger specifications of products are installed on the copper bus loop, due to the heavy weight of the product, it is recommended to use a flat-mount bracket to increase its installation stability. And in order to obtain better monitoring results, the busbar is located in the middle of the rectangular through-hole of the transformer as much as possible, and it is not advisable to make the busbar too close to the straight inner wall of the product.
This series of products can be equipped with special structures on the upper part of the product as needed. Customers can install the signal processing unit on the top of the transformer as needed to expand product functions and reduce costs.
Features :
*Epoxy resin encapsulation, waterproof, excellent insulation performance;
*Strong overload capacity, can be overloaded for a long time at 20 times the rated current as needed;
*Excellent balance characteristics, small-size products meet the detector alarm threshold 50mA requirements;
*High accuracy: 0.5/1.0/3 levels of accuracy are optional;
*Compact design, small size, beautiful appearance;
*Good consistency and excellent interchangeability;
Naming :
Color code:
0: black; 3: red; 8: gray; 9: white;
The shell color specified by the customer is coded and classified according to the main color of the color system;
Normal use and installation conditions :
Installation location: Indoors.
Ambient temperature -10℃~＋40℃.
Ambient humidity The recommended relative humidity is not more than 80%.
Altitude Not more than 3000m.
Atmospheric conditions There is no serious pollution, corrosive and explosive media in the atmosphere.
No environment with significant frequent vibration and impact.
Storage temperature -20℃~＋75℃.
General technical indicators:
Transformer electrical schematic diagram:
The primary current IP flows in from the P1 terminal and out from the P2 terminal; the secondary current flows out from the S1 terminal and flows in from the S2 terminal.
Generally, current transformers use the same name relationship of the reduced pole, that is, the secondary output terminal and the primary input terminal are the same name terminals to indicate the relationship between the primary and secondary currents.
The output current signal of the secondary side of the residual current transformer is generally small. It is recommended to use the current output method to improve the anti-interference ability as much as possible.
IP*N1=IS*N2, the general primary rated current is 1A, the secondary rated current is 0.5mA, or other parameters are specified according to the equation; Ip is the vector sum of the currents of each cable in the residual current transformer window loop, and has no great correlation with the current size of the loop cable.
The product contains a voltage clamping circuit, and the effective value of the clamping voltage is 1.4V, which can be changed according to the customer design during production.
Balance characteristic parameters:
When the residual current transformer passes the corresponding sinusoidal AC current, its output sampling value voltage should meet the requirements in the following table.
R=1000Ω C=0.022μF Current source frequency: 50-60Hz; accuracy better than 0.1%; voltmeter AC mV sampling accuracy better than 0.1%.
Product size corresponding chart:
