Products infomation

 
 
Surge Cut Transformer
 

LCC series

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 CUT TRANSFORMER" is an excellent performer because it rarely the breakdown and is easy to treat and is in various places.

 
Functions
"SURGE CUT TRANSFORMER" is a brand name of the transformer which our company TOYO ELECTRIC CORPORATION CO., LTD 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 CUT TRANSFORMER"
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

Classification
The surge protective devices
Discharge type
arrester, varistor, transit discharge element
Insulation type
transformer (SURGE CUT TRANSFORMER)
Open type
fuse etc.

The protector and surge protective devices are made of the combination of these protective devices.
Fig 1 is basic circuit diagram of "SURGE CUT TRANSFORMER" of our company.




Terminal symbol

primary
1U, 2U, 1V, 2V
secondary
1u, 2u, 1v, 2v
earth
E

Terminal connection

pri. voltage
usable terminal
short circuit terminal
100V
1U, 2V
1U-2U, 1V-2V
200V
1U, 2V
2U-1V

sec.voltage
usable terminal
short circuit terminal
100V
1u, 2v
1u-2u, 1v-2v
200V
1u, 2v
2u-1v


<Fig 1> Circuit diagram of "SURGE CUT TRANSFORMER"

"SURGE CUT TRANSFORMER" equipped with the earthed plate between coil winding of primary and
secondary. And "SURGE CUT TRANSFORMER" 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

Phase
1
3
Frequency
50 or 60 Hz
Insulation type
B
H
B
H
Primary voltage
200 (100) V serial parallel conversion
200
200
200
Secondary voltage
100 (100) V serial parallel conversion
100
(2 phase)
200-100
(3 phase)
200
Connection
delta - delta
Dielectric strength
Between input and output/ground: 10 kV AC (1 min.)
Between output and input/ground: 3 kV AC (1 min.)
Lightning impulse withstand voltage
Between input and output/ground: 30 kV AC (1.2/50 s)
Between output and input/ground: 10 kV AC (1.2/50 s)
Surge transfer
Common mode: -60 dB or less
Normal mode: -30 to -20 dB or less *1 *2
Voltage fluctuation
0.75 kVA or less: 5%
Over 0.75 kVA to 2 kVA or less: 4%
Over 2 kVA: 3%
7.5 kVA or less: 3%
Over 7.5 kVA: 2%
Efficiency
0.5 kVA or less: 93%
Over 0.5 kVA to 0.75 kVA or less: 94%
Over 0.75 kVA to 2 kVA or less: 95%
Over 2 kVA: 96%

7.5 kVA or less: 95%
Over 7.5 kVA: 97%
Capacity (kVA)
0.5




1
1
2


2
3
3
5
5
7.5
7.5
10
10
10
15
15
15

20
20
20

30
30
30
50
50
50

*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.