silicon-controlled switch (SCS)
Ø DST SCR overview
Silicon controlled switch DST (hereinafter referred as the DST SCR) using advanced thyristor control technology, the bidirectional anti parallel thyristor module, trigger circuit, snubber circuit, fins, and cooling device and other components; DST silicon controlled by zero trigger circuit, which can eliminate the input capacitance current, when the current become lower than thyristor module to maintain current, then capacitance will be removed, thus removed capacitance does not produce over voltage, improve the power grid voltage flicker.
DST thyristor is mainly suitable for single-phase three-phase compensation or compensation, especially suitable for large range of load voltage fluctuation, power qualityis poor occasions; according to the system and the load change, by using DST SCR drive multistage capacitor for rapid and frequent switching capacitor; can effectively reduce the capacitor cast voltage, resulting in cutting process can ensure the over current; electrical equipment running in good condition, so that the service life of the capacitor has been greatly expended, product quality and production efficiency has been greatly improved, to bring significant economic benefits.
Ø DST SCR product characteristics
l standard module structure, simple installation and easy maintenance
l zero crossing switching, no inrush current, not voltage flicker
l photoelectric isolation, strong anti-interference ability, fast response speed (<20ms)
l integration, small volume, convenient installation
l It is equipped with LED lights display switching state
l the built-in cooling fan, automatically control the fan to start and stop
l built-in over temperature protection device (>80 ℃protection action)
l the whole cast structure, strong and durable
l can touch a secure connection technology, protection class IP30
l mute switch, no mechanical wear, long service life
Ø DST SCR technology parameters
Item | DST-400-50 | DST-400-80 | DST-400-80-F |
Rated voltage | U | 400V 50/60Hz |
Drive current |
| ≤30mA |
Switching capacity | kvar | 50 | 80 | 80 |
Switching response time | t | 20ms |
Installation position |
| Indoor |
Protection grade |
| IP30 |
Control signal |
| DC 12V |
Work environment | Temperature | -25℃～55℃ |
Humidity | 40℃ 20%～90% |
| No severe vibration and impact |
| No conductive dust and corrosive gas |
The parameters of fan | Rated voltage | AC 220V/50Hz |
The temperature parameter | Cooling mode | Cooling: fan start temperature setting value is 40 ± 5 ℃ |
Automatic cooling |
Overheating protection | 80 degrees automatically cut off the capacitor group |
The implementation of standards | IEC60831-1-2002 IEC60831-2-1995 UL810-2008 EIA-456-A-1989 DL/T842-2003 EN60831-1-1998+A1-2003 EN60831-2-1996 GB/T12747.1-2004 GB/T12747.2-2004 |
Ø DST SCR dimensions
Item model | Size (mm) | Compensation method | The maximum compensation capacity （400V） | weight (kg) |
A | B | C | D | E | F |
DST-400-50 | 100 | 148 | 135 | 135 | 173 | 148 | Total compensation | 50kvar | 2.80 |
DST-400-80 | 96 | 160 | 140 | 157 | 170 | 160 | Total compensation | 80kvar | 3.26 |
DST-400-80-F | 96 | 160 | 140 | 157 | 170 | 160 | Total compensation | 80kvar | 3.26 |
