CT07 series , CT07D 20A/20mA class 0.5 Current transformer for
working frequency 50-400Hz , energy meter, power transducer
Features:
1. Good voltage separation ability and insulation property
2. It is applicable for working frequency 50-400Hz
3. With burnt-resistant PBT case and epoxy resin, current
transformer can reach insulation resistance of 500VDC ≥100mΩ,
electrical strength 4000VAC,1mA 60S.
4. Under the ambient temperature -25℃ ~75℃, CT07 serires are main
applied in electronics energy meter, power transducer and other
electric meters.
For our current transformers, which are produced by using high
permeability permalloy core or good quality laminated silicon steel
core, inflammable epoxy resin and case with our high precision
toroidal winding machine & current transformer testers, steady
quality and reliable safety, are widely applied in electronic
energy meter, power transducer, RTU, electronical monitoring meter,
power factor compensator, digital meter, motor control, industrial
control system, electrical meter equipment, etc.
| DIM(mm)P/N | CT07A | CT07D | CT07E | CT07F |
| DIM |
| A | 23.5 | 26 | 37 | 49 |
| B | 12.5 | 17 | 14 | 20 |
| C | 25 | 29 | 39 | 54 |
| D | 7 +/-0.2 | 9 +/-0.2 | 13 +/-0.2 | 18.5 +/-0.2 |
| E | 15 | 15 | 25 | 29.5 |
| F | 18.5 | 18.5 | 32.5 | 37 |
| G | 10.5 | 15 | 11 | 17.5 |
| H | 1 | 1 | 1 | 1 |
| I | 6 | 6 | 6 | 6 |
| Performance & Specification |
| Part No. | Rated primary current (A) | Max primary current (A) | Rated secondary current (mA) | Current ratio | Output voltage (mV) | Accuracy class | Outline |
| CT07A | 5 | 40 | 2.5 | 2000:1 | 100 | 0.2, 0.5 | CT07A |
| 10 | 40 | 4 | 2500:1 | 100 | 0.2, 0.5 |
| 20 | 40 | 10 | 2000:1 | 100 | 0.1, 0.2, 0.5 |
| CT07D | 10 | 60 | 4 | 2500:1 | 100 | 0.1, 0.2, 0.5 | CT07D |
| 20 | 60 | 10 | 2000:1 | 100 | 0.1, 0.2, 0.5 |
| 40 | 60 | 20 | 2000:1 | 100 | 0.1, 0.2, 0.5 |
| CT07E | 60 | 120 | 24 | 2500:1 | 100 | 0.2, 0.5 | CT07E |
| 80 | 120 | 32 | 2500:1 | 100 | 0.2, 0.5 |
| 120 | 120 | 48 | 2500:1 | 100 | 0.1, 0.2, 0.5 |
| CT07F | 100 | 200 | 40 | 2500:1 | 100 | 0.2, 0.5 | CT07F |
| 100 | 200 | 50 | 2000:1 | 100 | 0.2, 0.5 |
| 200 | 200 | 80 | 2500:1 | 100 | 0.1, 0.2, 0.5 |
For example
CT07D 20A/20mA Class 0.5
| ELECTRICAL CHARACTERSTIC: |
| NO. | ITEM | MEASURED POINT | TECHNICAL DATA | REMARK |
| 1 | Normal Primary Current | A--B | 20A | |
| 2 | Normal Secondary current | 2--1 | 20mA | |
| 3 | Maximum Primary current | | 2V±10% | IN=20A RL=100Ω |
| 4 | Turns ratio | | | |
| 5 | Nominal working frequecncy | | 50Hz--60Hz | |
| 6 | Load Resistance | | 10Ω | |
| 7 | DC Resistance | | 45Ω MAX | 25℃ |
| 8 | Accuracy | | 0.50% | |
| 9 | HI-POT | P-S | AC3000V 60S 1mA |
| MATERIAL LIST: |
| NO. | ITEM | MATERIALS | REMARK |
| 1 | CORE | φ14*22*10 Z11 | |
| 2 | CASE | CT07D PBT | E59481(S)/ |
| 3 | WIRE | UEW-2 Ø0.15mm 130℃ | E85640 |
| 4 | EPOXY | 3300A/B / 910A/B | E218090 |
| 5 | PIN | φ1.0*25 | |
| 6 | TAPE | 1mil*8mm CT-280 130℃ | E165111 |
