T 18 mA/mV
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KN residual flow
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Product description
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Discription
*Application:Smart electricity consumption of buildings, supporting fire and fire detectors to monitor the residual current of the power lines;
*Use Principle:Based on Kirchhoff, the input and output current is zero, manage and control the residual current;
*Features: split core type， fast and easy installation ,The accuracy change rate is small at high and low temperature.
Specs
*Rated Voltage:1 KV；
*Window Size:45 - 65 - 80 mm；
*Input current:0.1- 1 - 5 - 10 A；
*Accuracy: 1.0-5.0；
*Cable leads:1m；
*Work environment: - 25℃ - 50℃。
Drawing
| Model | Applicable system current (A) |
Reference size (mm) |
||
|
O |
L |
H |
||
| KZCT45 |
600 |
46 | 100 | 28.5 |
| KZCT65 |
1000 |
66 | 127.5 | 28.5 |
| KZCT80 |
1500 |
81 | 145.5 | 28.5 |
Technical explanation
 |
What is the difference between zero sequence transformer and residual current transformer? The working principle of zero sequence current transformer and residual current transformer is similar, very Many people default that the zero sequence current and the residual current are the same, in fact, there is a difference between the two Yes, the objects protected by the first constitution are different. The zero sequence current protection is the current formed by the three-phase unbalance or lack of phase, Therefore, the current is generally very large, so the transformer usually outputs 5A or 1A The way, the main work is similar to the protective strider transformer. Zero sequence Strike current transformer generally sets 3 phase wires without neutral wire or ground wire. The remaining current transformers generally test residual current or wire The leakage current of the circuit, not the zero sequence current or the lack of phase current, so the remaining power The current mutual inductance needs two wires to be covered with 4 wires, in addition to the 3 grain phase wires, the neutral wire or ground wire is also required Set in and lose. |
installation method
Order requirements
1、Select the model according to cable diameter;
2、Zero phase current and ratio；
3、Secondary cablr length (or terminal) and sensitivity。
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