Closed loop residual zero sequence current transformer
Product Description
At the same time, it meets the requirements of balanced characteristics, and the unbalanced current output is better than 30mA, 10mA, and 5mA. The product adopts high-quality high-conductivity magnetic core and advanced process technology, which can meet the technical requirements of different precisions such as 0.2, 0.5, and 1.0, and has high reliability. This series of products meet the requirements of GB 14287.2-2014 and GB 13955-2005.
Product Features
* Flexible output mode, socket or lead output;
* A variety of core hole diameter options, the hole diameter is from φ12mm to φ260mm;
* Casting with epoxy resin, good stability;
* Adopt high magnetic permeability nickel steel or nanocrystalline magnetic core, with good linearity and high sensitivity .
* Excellent balance characteristics, with strong anti-electromagnetic interference ability.
Scope of Application
Suitable for motor protection, electromagnetic relay protection device, microcomputer protection device; electrical
fire monitoring, fire leakage system, low current grounding system.
Product Parameters
Electric Performance Parameters | Operating Temperature | -40℃～+70℃ | Relative Humidity | ≤90% |
Voltage Level | 0.4/0.66/0.72kV | Linear Range | 5%～120% | |
Rated Input Current (AC) | 10mA～5A | Working Frequency | 45～1250Hz | |
Rated Output (AC) | 0～1V or 0～5mA | Medium Strength: | 3000Vac/min | |
Accuracy Class | 0.5、1.0、2.0 | Insulation Resistance | ＞500 M Ohms/500Vdc | |
Mechanical Structure Parameters | Shell Material | PBT/PC Flame Retardant Grade 94- V0 | Output Method | Socket or Shielded Sheathed Wire |
Iron Core Material | Nickel Steel or Ultra Microcrystalline | construction plan | Base installation bolts are fixed | |
Sealing and Filling | Epoxy Resin | Environmental Requirements | Meet RoHS |
Model Definition
Typical Value of Main Products
Model NO. | Input current rated Value AC | Rated Continuous Thermal Current AC |
Common Transformation Ratio |
Accuracy Class |
Secondary Load(Ohms ) | Dimensions（mm） | |
ApertureD | other size | ||||||
TR21125B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 |
≤200 |
25 | L-W-H-J-A1-A2 80-22-69.5-68- 5.2-8 |
TR21126B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 |
≤500 |
45 | L-W-H-J-A1-A2 120-33-101.5- 98-5.2-8.5 |
TR21127B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 |
≤500 |
55 | L-W-H-J-A1-A2 150-35-126- 126-5.2-12 |
TR2174B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 |
≤500 |
35 | L-W-H-J-A1-A2 100-30-90- 83.5-5.2-9.5 |
TR21313B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 |
≤500 |
32 | L-W-H-J-A1-A2 91-28-70-80- 5.5-7.5 |
TR21314B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 | ≤500 | 45 | L-W-H-J-A1-A2 104-28-83-93- 5.5-7.5 |
TR21315B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 | ≤500 | 65 | L-W-H-J-A1-A2 126-28-105- 115-5.5-7.5 |
TR21316B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 | ≤500 | 80 | L-W-H-J-A1-A2 143-28-122- 132-5.5-7.5 |
TR21317B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 | ≤500 | 105 | L-W-H-J-A1-A2 172-28-151- 161-5.5-7.5 |
TR21117B |
10mA～5A |
10A |
1000:1 2000:1 |
0.2，0.5 | ≤500 | 72 | L-W-H-J-A1-A2 175-42-150- 150-6.2-13 |
Outline Structure Diagram (Unit :mm）