Current transformer is one of important devices for power system and used to transform the voltage or current. Current radio 50:5A, 100:5A, 250:5A, to 400:5A. AC current transformer with rated frequency 50Hz or 60Hz, free shipping and good value for money.
Note: The installation method of current transformer can be fixed by busbar and fixed by the bottom plate, suitable for installation in any direction. The primary conductor can be busbar or cable.
Specification:
Model | CHN-CT-3030I |
Weight | 1kg |
Current Ratio (A) | VA Secondary load/ Burden (VA) | Cross-core Turn Number |
0.2 | 0.5S | 0.2S |
30/A | 2.5 | 2.5 | 2.5 | 3 |
50/5 | 2.5 | 2.5 | 2.5 | 2 |
75/5 | 2.5 | 2.5 | 2.5 | 2 |
100/5 | 2.5 | 2.5 | 2.5 | 1 |
150/5 | 2.5 | 1.5 | 1.5 | 5 |
200/5 | 5 | 5 | 3.75 | 1 |
250/5 | 5 | 5 | 5 | 1 |
300/5 | 5 | 5 | 5 | 1 |
400/5 | 5 | 5 | 5 | 1 |
Rated Frequency | 50/60Hz |
Rated Test Voltage | 3kV AC (1min) |
Rated Short-Time Thermal Current (ith) | 60 in |
Rated Dynamic Current (idyn) | 2.5 lth |
Rated Voltage (Um) | 0.66 kV AC |
Continuous Overload (ld) | 1.2 in |
Operating Temperature | -10℃~50℃ |
Housing Self-Extinguishing Class | VO |
Safety Factor | FS 5 |
Secondary Current | 5A/ 1A |
Bus Specification (mm)/Number | / |
Dimension (unit: mm)

Model | Dimensions | Perforation size | Installation size |
W | H | D | a | e | φ | M | N |
CHN-CT-30I | 62 | 78 | 45 | 32 | 11 | 22 | 40 | 57.5 |
CHN-CT-3030I | 85 | 102 | 50 | 32 | 11 | 28 | | 57.5 |
CHN-CT-40I | 75 | 95 | 45 | 42 | 11 | 31 | 40 | 57.5 |
CHN-CT-60I | 102 | 130 | 45 | 61.5 | 21 | 45 | 42 | 57.5 |
CHN-CT-60II | 102 | 125 | 45 | 31 | 33 | / | 42 | 57.5 |
CHN-CT-80I | 118 | 140 | 45 | 82 | 11 | 52 | 60 | 57.5 |
CHN-CT-100II | 145 | 125 | 45 | 103 | 35 | / | 80 | 57.5 |
Tips: What causes the current transformer to burn out?
- Secondary open circuit of the current transformer produces high voltage to burn out the current transformer.
- Long-term use of the current transformer makes the insulation aging, local breakdown or discharge occurs and overvoltage is thereof produced, thus burning out the current transformer.
- Long-term overload operation makes the current transformer to give out heat, it is thereof burned out.
- The aluminum contact surface of current transformer’s primary connection is seriously oxidized, which results in large contact resistance. The contact resistance gives out heats and burns out the current transformer.
Low cost CT transformer rated frequency 50Hz and 60Hz are optional, current ratio can be 30/5A, 75/5A, 100/5A, 200/5A and 400/5A, accuracy classes can be selected. AC current transformer with high accuracy, fast response and light weight.