The 513 rectangular series residual current transformer is mainly used in low-voltage distribution cabinets such as 380V and 660V, or in drawer cabinets with relatively high density, 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 and high-magnetic nanocrystalline soft magnetic materials. 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.
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 the fixed foot of the product adopts a rotating structure design, which can not only reduce costs as much as possible during packaging and transportation, but also play a good protective role for the fixed structure.
When installing larger-sized products on the copper busbar loop, it is recommended to use a flat-mount bracket to increase the stability of the installation due to the heavy weight of the product. In order to obtain better monitoring results, the busbar should be 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.

The terminal position of this series of products also adopts a standard guide rail structure design, and the housing of the signal processing unit can be mounted on it. This gives the product greater expansion functions.

FEATURES:

*Signal processing units can be added to expand product functions.
*Strong overload capacity, 20 times the rated current can be overloaded for a long time as needed.
*Excellent balance characteristics, small-size products meet the detector alarm threshold requirement of 50mA.
*High precision: 0.5/1.0/3 levels of precision are optional.
*Compact design, small size, beautiful appearance
*Strong versatility and good 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 :