This type of current transformer adopts epoxy-resin vacuum casting and fully enclosed post structure, is applicable for power systems of rated frequency 50Hz or 60Hz rated voltage up to and including 10kV, used for electric energy metering, current measurement, and relay protection, it can be an arbitrary combination of classes 0.2S, 0.2, 0.5 and 10P.
It complies with the standards GB20840.1-2010 Instrument transformers-Part 1: General requirements, GB 20840.2-2014 Instrument transformers- Part 2: Additional requirements for current transformers, and JJG 313-2010 Instrument Current Transformers.
NORMAL ENVIRONMENTAL USAGE
- Altitude: Should not exceed 1000m
- Ambient temperature:-5ºC~+40ºC
- Air Relative Humidity: Less than or equal to 85%
- Air relative site: Indoor.
TECHNICAL PARAMETERS
- Insulation level:12/42/75kV
- Power factor:cosΦ=0.8(lag)
- Rated secondary current: 5A or 1A
- Rated frequency: 50Hz or 60Hz
- Weight: 21kg
TRANSFORMER RATIO
| Rated primary current(A) |
Accuracy class |
Rated output(VA) |
Rated short-time thermal
current(kA/s) |
Rated insulation level(kA) |
| 5 |
0.2S
0.2S/0.5
0.2S/0.5/10P10
0.2S/10P10 |
10
10/10
10/10/15
10/15 |
0.36 |
0.9 |
| 10 |
0.72 |
1.8 |
| 15 |
1.08 |
2.7 |
| 20 |
1.44 |
3.6 |
| 25 |
1.8 |
4.5 |
| 30 |
2.16 |
5.4 |
| 40 |
2.88 |
6.3 |
| 50 |
3.6 |
7.2 |
| 60 |
4.32 |
8.1 |
| 75 |
5.4 |
13.5 |
| 80 |
5.76 |
14.4 |
| 100 |
7.2 |
18 |
| 120 |
8.64 |
21.6 |
| 150 |
10.8 |
27 |
| 200 |
14.4 |
36 |
| 250 |
18 |
45 |
| 300 |
21.6 |
54 |
| 400 |
28.8 |
63 |
| 500 |
36 |
72 |
| 600 |
43.2 |
108 |
| 800 |
57.6 |
120 |
| 1000-1500 |
172 |
144 |
The new explosion type LMZJ1-10Q epoxy resin cast insulation fully enclosed busway current transformer is a kind of current transformer suitable for 10kV and below power system, mainly used for electric energy measurement, current measurement and relay protection. The following is the key information of this product:
Overview:
LMZJ1-10Q type current transformer is an epoxy resin casting insulated busbar type fully enclosed product, suitable for rated frequency 50Hz or 60Hz, rated voltage 10kV and below in the power system
The current transformer is fully enclosed with epoxy resin casting insulation busbar.
Technical parameters:
Rated secondary current: 5A or 1A.
Rated secondary current: 5A or 1A.
Rated insulation level: 12/42/75kV.
.
Power factor of load: cosφ=0.8 (lagging)
.
Surface creepage distance: 230mm for LMZ1-10Q
The surface creepage distance:LMZ1-10Q is 230mm.
Filth grade: grade
The grade of dirtiness: Grade .
Structure introduction:
This series of current transformer is epoxy resin cast insulation fully enclosed busbar structure. The core is circular, the secondary winding is evenly wound in the core, molded with epoxy resin casting, and the casting body is fixed on the wall mounting plate.
.
Principle:
Based on the principle of electromagnetic induction, it consists of a closed core and windings. The primary winding has few turns and is strung in the line of the current to be measured, while the secondary winding has more turns and is strung in the measuring instrument and protection circuit.
The secondary winding has more turns and is strung in the measuring instrument and protection circuit.
Model meaning and current ratio:
Product model LMZJ1-10Q, rated voltage is 10kV, rated primary current, accurate level combination and rated output are shown in Table
Rated primary current, accurate level combination and rated output are shown in the table.
Outline and installation dimensions:
Specific external dimensions and installation dimensions may vary according to the specific product model, but usually the casting body is fixed on the through-wall mounting plate
The casting is normally fixed to a through-wall mounting plate.
Principles of use:
The wiring of the current transformer should comply with the principle of series connection: that is, the primary winding resistance should be connected in series with the circuit under test, while the secondary winding resistance is connected in series with all the instrument loads.
The following information is provided for the New Explosion type LTC transformer.
The above information provides a detailed description of the new explosion type LMZJ1-10Q epoxy resin cast insulated fully enclosed busway current transformer, including its overview, technical parameters, structural characteristics, working principle and principles of use.
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