Introduce:
CTK Series zero-sequence current transformers are used inconjunction with relay protection devices or signals when thepower system generates zero-sequence grounding current, sothat the device components can operate to achieve protectionor monitoring.
When an electric shock or leakage fault occurs in the circuit.the secondary side of the transformer outputs a zero-sequencecurrent, so that the equipment on the connected secondarv linewill be protected (cut off the power supply, alarm, etc.)
Mainfeatures:
- Detection of unbalanced current: ZCT is designed to measure the unbalanced current in a three-phase electrical system, which is the sum of the three phase currents. This allows them to detect ground faults, which can occur when a fault current flows from one or more of the phase conductors to ground.
- High sensitivity: ZCT is highly sensitive and can detect even small amounts of ground fault current. This helps to prevent damage to equipment and reduce the risk of electric shock to personnel.
- Accuracy: ZCT is designed to provide accurate measurements of the zero-sequence component of the current, even in the presence of high levels of noise or interference.
- Non-intrusive installation: ZCT is typically installed around the neutral conductor of a three-phase system, which means that they can be installed without the need to break the circuit or interrupt power to the load.
- Frequency response: ZCT is designed to operate over a wide range of frequencies, typically from 50Hz to 400Hz, which makes them suitable for use in a variety of applications.
- Low burden: ZCT is designed to have a low burden, which means that they do not significantly affect the operation of the circuit or the accuracy of other measurement devices in the system.
Application:
- Electric fire monitorin
- Fire prevention and leakage protection system
- Electromagnetic relaying protection
- Microcomputer protection, etc.
| Electrical parameters | Mechanical parameters | ||
| Frequency | 50~400Hz | Shell | ABS（flame retardant grade 94-V0） |
| Rated input | 10mA~5A | Bobbin | PBT |
| Measuring range | 10%In~130%In | iron core | Ni steel/nanocrystalline |
| Rated output | 0~1v (A or) 0~0.25mA | Internal structure | Environmentally friendly epoxy resin casting |
| Ratio difference | ≤±0.1% | Construction plan | Screw fixing |
| Phase difference | ≤±10 | Working temperature | -25℃~ +75℃ |
| Dielectric Strength | 2.5KV/1mA/1min | Ambient Humidity | ≤85% |
| Insulation resistance | DC500V/1000MΩ/min | Wiring method | Terminal type/shielded twisted wire 1.5m |
| Model Specifications | Dimensions | ||||||
| Reference current | ø | A | B | C | D | E | |
| CTK-45 | ≤100A | 45 | 104 | 81 | 95 | 5 | 28 |
| CTK-65 | ≤225A | 65 | 124 | 101 | 115 | 5 | 28 |
| CTK-80 | ≤400A | 80 | 138 | 116 | 130 | 5 | 28 |
| CTK-100 | ≤630A | 100 | 158 | 136 | 150 | 5 | 28 |
