| 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 range current transformer RECT-38A 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 RECT current transformer?
Select the RECT current transformer according to the primary current, conductor dimensions, meter input, accuracy requirement and secondary circuit burden. RECT-38A, RECT-66A and RECT-78A have window diameters of 38 mm, 66 mm and 78 mm respectively. Check the rating factor at your operating ambient temperature before confirming the model.
2. What does the rating factor (RF) mean for a RECT current transformer?
The rating factor indicates the permitted continuous primary current as a multiple of the rated primary current, under specified conditions. For example, a 100/5 A CT with RF 4 permits a continuous primary current of 400 A under the stated conditions. Use the RF listed for the selected ratio and ambient temperature.
3. What do 0.3 B-0.1, 0.3 B-0.2 and 0.3 B-0.5 mean?
These IEEE metering designations specify the accuracy class and standard burden. The “0.3” identifies the metering accuracy class, while “B-0.1,” “B-0.2” and “B-0.5” identify different burden conditions. Match the selected CT to the combined burden of the meter, secondary cables and connections to maintain the specified accuracy.
4. Can RECT current transformers be installed outdoors?
RECT current transformers are intended for indoor installation or installation inside an outdoor enclosure. For outdoor applications, use a suitable protective enclosure and confirm the environmental requirements before ordering. Resin insulation alone should not be treated as approval for direct exposure to rain or other weather conditions.
5. What information is needed for a RECT current transformer quotation?
Please provide the required current ratio, conductor dimensions, accuracy and burden requirements, operating frequency, ambient temperature, installation environment and quantity. RECT catalogue configurations have a 5 A secondary output. If available, include the meter specifications, secondary cable length and project requirements so we can check the proposed configuration.
