| Model | Current Ratio | RF | Accuracy & Burden (IEEE) | Window Diameter | Approx. Weight | |
| At 30℃ Ambient Temperature | At 55℃ Ambient Temperature | |||||
| RECT-38A | 100 / 5A | 4 | 4 | 0.3 B-0.2 | 38 mm | 6.5 kg |
| RECT-66A | 150 / 5A | 4 | 4 | 0.3 B-0.1 | 66 mm | 5.0 kg |
| 200 / 5A | 4 | 4 | 0.3 B-0.5 | |||
| 250 / 5A | 4 | 4 | 0.3 B-0.5 | |||
| RECT-78A | 300 / 5A | 4 | 2.9 | 0.3 B-0.5 | 78 mm | 4.0 kg |
| 400 / 5A | 4 | 2.9 | 0.3 B-0.5 | |||
| 500 / 5A | 3 | 2.4 | 0.3 B-0.5 | |||
| 600 / 5A | 2 | 1.8 | 0.3 B-0.5 | |||
| 800 / 5A | 2 | 1.5 | 0.3 B-0.5 | |||
HEYI extend current transformer RECT-66A type
- Standards: IEEE C57.13
- Secondary side equipped with a short-circuiting device
- Sealable
- Application: Indoors, or in an outdoor enclosure
- Rated Voltage: Up to 0.72 kV
- Frequency: 50 or 60 Hz
- 0.3 Metering Class
| Model | Current | Accuracy & | Window | Approx. | ||
| Ratio | RF | Burden (IEEE) | Diameter | Weight | ||
| ROS-66A | 150 / 5A | 1% ~ 150% | 0.3 B-0.1 | 66 mm | 5.0 kg | |
| 200 / 5A | 1% ~ 150% | 0.3 B-0.5 | ||||
| 250 / 5A | 1% ~ 150% | 0.3 B-0.5 | ||||
| ROS-78A | 300 / 5A | 1% ~ 150% | 0.3 B-0.5 | 78 mm | 4.0 kg | |
| 400 / 5A | 1% ~ 150% | 0.3 B-0.5 | ||||
| 500 / 5A | 1% ~ 150% | 0.3 B-0.5 | ||||
| 600 / 5A | 1% ~ 150% | 0.3 B-0.5 | ||||
| 800 / 5A | 1% ~ 150% | 0.3 B-0.5 | ||||
Diagram
FAQ
1. How do I select the right current ratio for the RECT-66A current transformer?
The RECT-66A is available with 150/5A, 200/5A and 250/5A ratios. Select the ratio according to your normal operating current, maximum continuous load and meter input requirements. Also check the rated burden and rating factor for your application.
2. What do the IEEE 0.3 accuracy class and B-0.1/B-0.5 burden ratings mean?
The IEEE 0.3 designation identifies the metering accuracy class under specified conditions. B-0.1 and B-0.5 identify standard secondary burden ratings. The RECT-66A is listed as 0.3 B-0.1 for 150/5A and 0.3 B-0.5 for 200/5A and 250/5A. Include both the meter burden and secondary wiring when checking compatibility.
3. Can the RECT-66A current transformer be used outdoors?
The RECT-66A is intended for indoor installation or installation inside an outdoor enclosure. For outdoor projects, use a suitable enclosure to protect the transformer and terminals from weather exposure. Confirm the installation conditions before ordering.
4. What does the rating factor (RF) mean for the RECT-66A?
The rating factor indicates the continuous primary-current capability relative to the rated primary current under specified conditions. The product table lists RF 4 at both 30°C and 55°C ambient temperatures for the RECT-66A. Check the applicable accuracy and burden conditions before selecting it for sustained high-load operation.
5. What information should I provide when requesting a RECT-66A quotation?
Please provide the required current ratio, accuracy class, burden, operating current, ambient temperature and quantity. Include your cable or busbar dimensions to confirm compatibility with the 66 mm window. For project orders, also share any requirements for drawings, test reports or approval documents.
