High-Quality MR Series Current Transformers from China Suppliers and Factory for Power Monitoring and Protection
Product Overview
A CT uses electromagnetic induction and has two windings: a main winding with a few turns connected in series to a high-current circuit and a secondary winding with several turns connected to safety or measurement devices. The secondary winding, which is typically tuned to 5A or 1A for the majority of industrial applications, gets extremely little current compared to the primary winding.
CTs require enough insulation to support a high voltage between windings, linearity to reduce measurement errors, and high precision for energy metering. When utilizing a CT, you should never leave the secondary winding open circuit. This is owing to the fact that an open circuit can generate extremely high voltages that might harm electrical equipment.
Finally, current transformers are critical to the dependability, efficacy, and safety of contemporary electrical systems because they allow for more exact current monitoring and issue detection.
Technical Parameters
| Parameter | Value |
|---|---|
| Primary current | 30–5000A |
| Secondary current | 5A, 1A |
| Standard approval | BS7626, IEC185 |
| Maximum voltage | 0.72KV |
| Frequency | 50/60Hz |
| Rated load | 5VA–15VA |
| Class | 1.0, 3.0 |
| Short-time thermal current | Ith = 60×Ih |
| Rated security coefficient | FS < 5 |
| Type | Rated Current (A) | ID | OD | HT |
|---|---|---|---|---|
| MR-28 | 30/5A – 100/5A | 28 | 70 | 40 |
| MR-42 | 100/5A – 250/5A | 42 | 80 | 30 |
| MR-45 | 300/5A | 45 | 80 | 30 |
| MR-60 | 400/5A | 60 | 100 | 30 |
| MR-60 | 500/5A – 600/5A | 60 | 100 | 30 |
| MR-85 | 800/5A – 1600/5A | 85 | 120 | 20 |
| MR-125 | 2000/5A – 5000/5A | 125 | 165 | 20 |