LCC series
Feature
Introduction
The electric installation and the communication system use the semiconductor extensively.
However, the semiconductor is not stress proof to a high voltage and the semiconductor is not functioning or damaged by lightning surge, occasionally.
The influences reach not only the devices but also the entire system, and various protection means are thought.
TOYO ELECTRIC’s “SURGE ISOLATION TRANSFORMER(SIT)” is an excellent performer because it rarely the breakdown and is easy to treat and is in various places.
Specification
Functions
“SURGE ISOLATION TRANSFORMER(SIT)” is a brand name of the transformer which our company TOYO ELECTRIC CORPORATION commercialized.
Function of a transformer : The function the same as a general transformer.
Lightning surge withstand voltage has a high level.
Function of lightning surge reduced
The translate of the common mode (between power line and the earth) lightning surge which invade from the primary side to the secondary side can be inhibit.
Features
It can decrease a primary lightning surge less than 1/1000 (-60dB)
Performance of lightning impulse withstand voltage
This is a transformer of low voltage class, and able to endured 30kV lightning impulse voltage between primary winding and earth.
TOYO ELECTRIC’s “SURGE ISOLATION TRANSFORMER(SIT)”
Various devices are sold as devices for the surge protective devices, they are classified according to
the characteristic of the surge protective devices.
It is shown in Table 1
<Table 1> Classification of the surge protective devices
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Classification
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The surge protective devices
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Discharge type
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arrester, varistor, transit discharge element
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Insulation type
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transformer (SURGE ISOLATION TRANSFORMER(SIT))
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Open type
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fuse etc.
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The protector and surge protective devices are made of the combination of these protective devices.
Fig 1 is basic circuit diagram of “SURGE ISOLATION TRANSFORMER(SIT)” of our company.
Terminal symbol
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primary
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1U, 2U, 1V, 2V
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secondary
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1u, 2u, 1v, 2v
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earth
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E
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Terminal connection
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pri. voltage
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usable terminal
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short circuit terminal
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100V
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1U, 2V
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1U-2U, 1V-2V
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200V
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1U, 2V
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2U-1V
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sec.voltage
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usable terminal
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short circuit terminal
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Used with
100V
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1u, 2v
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1u-2u, 1v-2v
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※Used with
200V
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1u, 2v
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2u-1v
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Select serial or parallel using the shorting bar when connecting a cable to Pri. or Sec. terminal.
Discharge withstand current rating of lightning arresting element
(Applied waveform 8/20μs)
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Number of applied times
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Once
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LA
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10kVA
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※Can be used as 200/100V(Single-phase three-wire system).
[Neutral current is 2U,1V terminal.]
<Fig 1> Circuit diagram of “SURGE ISOLATION TRANSFORMER(SIT)”
“SURGE ISOLATION TRANSFORMER(SIT)” equipped with the earthed plate between coil winding of primary and secondary. And “SURGE ISOLATION TRANSFORMER(SIT)” can reduce the surge translate from the primary side to secondary side.
Applications
Power supply transformer of :
Mobile phone relay stations
Intelligent transportation systems (ITS)
Hospitals
Railway communications and control devices
Security systems
Robots and automated control systems
Microwaves, telemeters, photoelectric display panels, and the like installed on mountaintops and plains
Specifications
Number of phase |
Single-phase |
Three-phase |
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Frequency |
50 or 60 Hz |
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Insulation Class |
B |
H |
B |
H |
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Primary voltage |
200 (100) V series – parallel switching |
200 |
200 |
200(Δconnection) |
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Secondary voltage |
100 (100) V
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100
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200-100
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200(Δconnection) |
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Insulation strength |
Between input – output/earth: 10 kV AC (1 min.) |
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Between output – input/earth: 3 kV AC (1 min.) |
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Lightning impulse withstand voltage |
Between input – output/earth: 30 kV (1.2/50 μs) |
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Between output – input/earth: 10 kV (1.2/50 μs) |
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Surge transfer rate |
Common mode: -60 dB or less |
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Normal mode: -30 to -20 dB or less *1 *2 |
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Voltage fluctuation |
0.5 kVA: 5% or less
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≦ 7.5 kVA : 3% or less> 7.5 kVA: 2% or less |
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Efficiency |
0.5 kVA: 93% or more
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≦ 7.5 kVA : 95% or more
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Capacity (kVA) |
0.5 |
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1 |
1 |
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2 |
2 |
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3 |
3 |
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5 |
5 |
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7.5 |
7.5 |
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10 |
10 |
10 |
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15 |
15 |
15 |
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20 |
20 |
20 |
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30 |
30 |
30 |
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50 |
50 |
50 |
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*1 Converted as normal-mode (unbalanced) surge-voltage input.
*2 Standard specification for single-phase 3 kVA or less; optional for other models.
Standard Accessories
Lightning arrestor
Normal mode surge attenuation element (for single-phase 3 kVA or less)
Optional Products
Normal mode surge attenuation element (equipped standard on single-phase 3 kVA or less)
Outdoor case (Munsell 5Y7/1 semi-matte coating)
Outdoor case (we will design and manufacturer outdoor cases through separate arrangement)
We offer one-stop support to meet all our customers’ specification needs for system controllers, from planning and development to manufacture and
sale.
Company and product names in this document are the trademarks or registered trademarks of their respective companies.
Please inquire about custom products.