HPR-R Type protection current transformer
Application
- It is used to collect low voltage overload and short circuit signals,and is used with protection relays
- The primary measurement range is 100-8000A, and the secondary output is 5A,1A
- Collect low voltage overload and short circuit signals,which can be used in conjunction with the motor protection unit.
- Used in places where there is no direct rain or snow,no serious pollution and severe vibration
HPR-R series low voltage protection current transformer is mainly suitable for relay protection circuits with multiple busbars. This product is developed for protection systems to detect short circuit faults, with different accuracy levels and accuracy limits. It can be extended to different perforation sizes and is widely used in low voltage distribution protection systems.
Standards
IEC-61869-2, EN60044-1, VDE0414-44-1, GB1208-2006
Product functions
The shell is made of flame-retardant, 120-degree high temperature resistant imported materials
Polycarbonate
The core is made of oriented cold-rolled silicon steel strip
The secondary conductor is a high-strength electromagnetic enameled wire
The product has a novel structure, beautiful appearance, easy installation,
High precision, large capacity
Application
Used to collect low-voltage overload and short-circuit signals, and used in conjunction with protection relays
Primary measurement range 100-8000A, secondary output 5A, 1A
Collect low-voltage overload and short-circuit signals, and can be used in conjunction with motor protection units.
Used in places without direct influence of rain and snow, severe pollution and severe vibration
FAQ
1. What is the HPR-R protection current transformer used for?
The HPR-R protection current transformer supplies current signals to protection relays for low-voltage overload and short-circuit protection. It is suitable for low-voltage distribution protection circuits, including installations with multiple busbars, and can also be used with compatible motor protection units.
2. How do I select the current ratio, protection class and rated burden?
Select the current ratio according to the circuit’s rated current and the protection relay’s requirements. The protection class and accuracy limit factor should match the protection scheme and fault-current conditions. The rated burden must account for the relay input, secondary cables and connections. Please provide these details so HEYI can help confirm a suitable HPR-R model.
3. Should I choose a 1A or 5A secondary output?
The HPR-R series offers 1A and 5A secondary outputs. Choose the output that matches your protection relay’s rated current input. For longer secondary cable runs, a 1A circuit can reduce cable burden compared with a 5A circuit using the same cable resistance. Confirm the complete secondary circuit burden before selection.
4. Can the HPR-R protection CT accommodate multiple parallel busbars?
The HPR-R series is designed for protection circuits with multiple busbars. Installation suitability depends on the selected model’s window dimensions and the busbar arrangement. Please provide the number, width, thickness and spacing of the busbars, together with the available installation space, so the fit can be checked against the dimensional drawing.
5. What information is required for an HPR-R protection CT quotation?
Please provide the current ratio, 1A or 5A secondary output, required protection class, accuracy limit factor, rated burden, operating frequency and order quantity. Include the busbar dimensions or an installation drawing, plus any project requirements for standards and test reports. These details help HEYI confirm the specification and prepare an accurate quotation.
