Class 0.5 MSQ Series high accuracy low voltage toroidal current
transformer
Description :
Current Transformer (CT) is used to transform the high AC current
to small easily manageable values. They're connected with the Panel
Meter or Relay and they can help to measure the current or protect
the equipments. Low voltage current transformers are manufactured
as of two types for measuring CT.
Measuring CT: Measuring current transformers are constructed to
feed on other low voltage apparatus such as measuring instruments,
relays, watt-hour meter (KW meter) and these type of current
transformers are mainly used 0.5 and 1.0 class to transfer the
current from highest rated current to rated secondary current.
Protection CT: Protection current transformers are constructed to
feed the protection relay. These type of current transformers are
mainly used 5P. (Customer supplied when required.)
Selection of the Current Transformer
To select the current transformer correctly, the following points
should be clarified:
- The application (for measuring or protection).
- The features of the working environment (Indoor or outdoor,
operating temperature, air humidity etc….).
- Operation voltage and frequency.
- Range of the primary current (maximum and minimum of the current
to be measured).
- Dimension of the cable or Bus bar.
- Data of the overload.
- Short circuit current.
- Specification of the measuring device associated with the current
transformer (Accuracy, rated current, consumption etc…).
- The diameter and length of the cable, the cable which is used to
connect the current transformer and associated measuring device.
Specifications
- Current
Ratio..................................................................................30/5A
- Accuracy.........................................................................................Class
0.5
- Burden.............................................................................................See
Selection Form.
- Security
Factor................................................................................FS<5
- Max System
Voltage.......................................................................720V
AC
- Test
Voltage.....................................................................................3kV
AC. (1 min.)
- Frequency........................................................................................50/60Hz
- Rated Short-time Thermal Current
(Ith)........................................Ith = 60 X In
- Rated Dynamic Current
(Idyn).......................................................Idyn =
2.5 X Ith
- Continuous
Overload.....................................................................1.2
X In
- Working
Temperature....................................................................-25°C
~ +50°C
- insulation
Rating.............................................................................Class
B
- Housing Self-extinguishing
Class.................................................VO
- Panel
Mounting................................................................................Provided
- Hinged Sealable Terminal
Cover....................................................Provided
- Standards.........................................................................................IEC/EN60044-1,
VDE0414-44-1, BS3938, BS7626
Selection Form
| Item | Current Ratio | Rated Burden (VA) | Case Qty. |
| Model | (A) | Class: 0.5 | Class: 1.0 | (Pcs) |
| MSQ-30B | 5/5 | 5 | 7.5 | 36 |
| MSQ-30B | 10/5 | 5 | 7.5 | 36 |
| MSQ-30B | 15/5 | 5 | 7.5 | 36 |
| MSQ-30B | 20/5 | 5 | 7.5 | 36 |
| MSQ-30B | 25/5 | 5 | 7.5 | 36 |
| MSQ-30B | 30/5 | 5 | 7.5 | 36 |
| MSQ-30B | 50/5 | 5 | 7.5 | 36 |
| MSQ-30B | 60/5 | 5 | 7.5 | 36 |
| MSQ-30B | 100/5 | 5 | 7.5 | 36 |
| MSQ-30B | 150/5 | 5 | 7.5 | 36 |
| MSQ-30B | 200/5 | 5 | 7.5 | 36 |
| MSQ-30B | 250/5 | 5 | 7.5 | 36 |
| MSQ-30B | 300/5 | 5 | 7.5 | 36
|
Note: Class and VA rating must be mentioned when ordering.
Dimension
