DC leakage current sensor is a measuring module that converts the measured direct current into the proportional direct current or voltage signal according to the fluxgate theory and the input side is highly insulated from the output side. Typical outputs include 4-20mA, DC0-5V and DC0-10V signals. These standard signals can be acquired by various devices such as PLC, RTU, and DAS cards and used for different current monitoring applications.
Leakage current transformers surround the outlet + and - of the DC circuit. It detects output signals of sensors in circuit branches. If the insulation in circuit branches is normal, the current passing the sensor must be equal in the opposite direction. The output signal is zero. If a circuit branch is grounded, the differential current passes the leakage current transformer and the output of the sensor is not zero.
Therefore, it is possible to identify the grounded branch in the DC system by detecting output signals from circuit branches. The theory guarantees accurate line identification and prevents the influence of distributed capacitance.
| Specification | Rated current | Power supply | Rated output | Aperture | Precision |
| AHLC-LTA | DC 10mA~2A | ±15V | 5V | φ20mm | 1 |
| AHLC-EA | DC 10mA~2A | ±15V | 5V | φ40mm | 1 |
| AHLC-EB | DC 10mA~2A | ±15V | 5V | φ60mm | 1 |
Size
Spec.
| Outline size(mm) | Through size(mm) | Mounting size(mm) | Figure |
| W | H | D | Φ2 | Φ1 | M | N |
| AHLC-LTA | 68 | 57 | 20 | 50 | 20 | 52 | 52 | Fig.1 |
| AHLC-EA | 100 | 108 | 30 | 75 | 40 | 78 | / | Fig.2 |
| AHLC-EB | 120 | 112 | 30 | 94 | 60 | 98 | / | Fig.3 |
Notes:
1. When the hall sensor is used, in order to obtain better dynamic characteristics and sensitivity, attention must be paid to the coupling between the primary side coil and the secondary side coil. It is recommended to use a single wire and the wire completely fills the hall sensor module wire hole;
2. When the hall sensor is used, the best measurement accuracy can be obtained under the rated input current value. When the measured current is far lower than the rated current To obtain the best accuracy, multiple turns can be used for the primary side, i.e. IPNP = rated ampere-turns. In addition, the temperature of the primary side feeder shall not exceed 80 ºC;
3. The auxiliary power supply of the Hall current sensor shall not exceed ± 20% of the calibrated value when it works normally;
4. Hall current sensor shall not fall from a high place (≥ 1m) during installation and use;
5. It is unable to adjust the zero point and full degree adjustment potentiometer;
6. Auxiliary power supply needs to be configured by itself;
7. The positive and negative poles of the power supply cannot be reversed
Installation Instructions
Acrel Co., Ltd.[stock code: 300286.SZ] is a high-tech enterprise that integrates R&D, production, sales, and service, since its establishment, is committed to providing users with energy efficiency management and powerful security system solutions. Acrel Electric has a complete production line from cloud platform software to sensors.
Acrel energy efficiency management system including substation operations and maintenance cloud platform, electricity safety management cloud platform, Environmental equipment power consumption monitoring cloud platform, prepaid management (system) cloud platform, intelligent power distribution monitoring system, power quality management system, building energy consumption management system, industrial energy control platform, leakage power monitor and control system, fire-fighting device power monitoring system, fire-proof door monitoring system, emergency lighting and evacuation indicating system, EV charger management system, data center power&environment monitoring system, smart lighting control system, IT isolation power supply system and related products.
The company attaches great importance to product quality and innovation. By the end of 2018, the company has 5 trademarks, 18 invention patents, 72 utility model patents, 94 appearance patents, and 147 computer software Copyrights, and has participated in the formulation of national or industrial standards.
