Mainly used for differential protection in order to match the ratios of main feeder CTs, which can protect sensitive instruments and devices during a fault. These CTs will saturate and limit their secondary currents within specified values.
Summation Current Transformers: These are used to measure sum of the currents in more than one line from the same phase of the system. Normally used for monitoring total current/power drawn from a system. Input to a Summation CT should be from the individual line CTs. It is necessary for the Line CTs to have same secondary currents. The out puts from Line CTs 500/5 A, 200/5A, 150/5A ...(not 150/1A...) can be connected to a summation CT Primary windings.
Interposing Current Transformers: Mainly used for differntial protection in order to match the ratios of main feeder CTs. These can also be used as saturation CTs, which can protect sensitive Instruments and devices during a fault. These CTs will saturate and limit their secondary currents within specified values.
Cast Resin Types: Recommended for higher mechanical strength and safety. Ideal for use in corosive atmosphere. All the above mentioned types of CTs can be supplies in Cast Resin Construction also.turate and limit their secondary currents within specified values.
Neutral Current Transformers: Used for measuring unbalance current in the neutral of a three phase system. Since the neutral current should be zero in a balance three phase system, the primary of these CTs are related for a fraction of the line currents in that system.
The following details if furnished with enquiries can help us to quote the right type of Transformers for your specific requirement
| Bar Primary Tape Wound | |||||
| Ratio Amps |
Rated |
Acc |
Dimensions in mm | ||
| ID | OD | DEPT | |||
| 50/5 | 5 | 3 | 30 | 85 | 50 |
| 100/5 | 5 | 1 | 30 | 85 | 50 |
| 150/5 | 5 | 1 | 30 | 85 | 50 |
| 200/5 | 5 | 1 | 30 | 85 | 50 |
| 300/5 | 10 | 1 | 50 | 100 | 50 |
| 400/5 | 15 | 1 | 50 | 100 | 50 |
| 600/5 | 15 | 1 | 50 | 100 | 50 |
| 800/5 | 15 | 1 | 75 | 120 | 50 |
| 1000/5 | 15 | 1 | 75 | 120 | 40 |
| 1500/5 | 15 | 1 | 85 | 130 | 40 |
| 2000/5 | 15 | 1 | 100 | 140 | 40 |
| 3000/5 | 15 | 1 | 125 | 170 | 40 |
