本產品適用於對低壓無功補償電容器的通斷控制。基本工作原理是將可控矽與磁保持繼電器並接。使複合開關在接通和斷開的瞬間具有可控矽過零投切的優點，而在正常接通期間又具有接觸器無功耗的優點。
該產品與交流接觸器、可控矽或固態繼電器等開關元件相比較有很大的技術優勢。主要優點是接到外部控制信號後，通過邏輯判斷，自動尋找最佳投入(切除)點；保證過零投切，無湧流；觸點不燒結；能耗小；無諧波注入；同時具有電壓異常保護；元件故障保護；運行指示等功能。與同類產品相比，其在技術上具有極大的先進性，高效低耗，環保節能，尤其是在湧流和安全可靠性方面性能大大提高。
DFFK智慧低壓複合開關分為Y型和S型，DFFK-Y用於單相電容，DFFK-S用於三相電容。
主要規格和技術參數
| |
DFFK-Y |
DFFK-S |
| 額定頻率 |
50Hz |
50Hz |
|
工作電源 |
AC400V±5% |
AC400V±5% |
| 控制信號 |
DC12V±20%，10～20mA |
DC12V±20%，10～20mA |
| 控制電容容量 |
5-15千乏 |
5-40千乏 |
| 回應時間 |
≤100ms |
≤100ms |
| 每次接通與關斷間隔 |
≥1秒 |
≥1秒 |
| 使用壽命 |
10萬次 |
10萬次 |
| 連接兩次接通間隔 |
不小於120秒 |
不小於120秒 |
| 絕緣等級 |
在正常大氣條件下≥10MΩ |
在正常大氣條件下≥10MΩ |
| 停電保護 |
正常工作時遇系統停電，自動斷開 |
正常工作時遇系統停電，自動斷開 |
| 外形尺寸 |
115×215×120mm |
115×215×120mm |
選型指南
|
型號 |
控制電容容量(KVAR) |
|
DFFK-40-S |
40(三相） |
|
DFFK-30-S |
30(三相） |
|
DFFK-20-S |
20(三相） |
|
DFFK-15-S |
15(三相） |
|
DFFK-10-S |
10(三相） |
|
DFFK-3*15-Y |
15(單相） |
|
DFFK-3*10-Y |
10(單相） |
|
DFFK-3*5-Y |
5(單相） |
使用條件
|
1、環境溫度： |
-20℃～50℃ |
|
2、相對濕度： |
25℃時20%～85% |
|
3、海拔高度： |
在2000m以下 |
|
4、周圍環境：
|
無易燃易爆，無導電介質，無腐蝕性氣體和液體侵入，無雨雪侵襲，不允許有劇烈振動與衝擊 |
|
5、運輸入貯存： |
不可重物堆壓，不可高處拋落 |
|
6、貯存溫度： |
-30℃～85℃ |
安裝方法
DFFK型複合開關外型為外掛式結構，上下分別有兩個螺絲孔，只用四隻螺絲即可把複合開關固定在鐵梁上。
DFFK型複合開關外型尺寸為：115×215×120mm，安裝開孔178mm×99mm（長×寬）。
Product Introduction
Advantages:
(1) After receiving the external control signal, through logical judge, the intelligent compound switch can search for the best switching point automatically;
(2) It also can ensure zero-crossing switching and no inrush current.
(3) It do not sintering with contacts;
(4) It is in the functions of low energy consumption, without harmonic injection; power failure protection and operation instructions.
Compared with similar products, the intelligent compound switch has a great advancement in technology, high efficiency and low energy consumption, energy saving and environmental protection, especially it has improved a lot on the functions of the inrush current and the safety and reliability.
The intelligent compound switch is divided into DFFK-Y type and DFFK-S type. DFFK-Y type is used for single-phase capacitor. DFFK-S type is used for three-phase capacitor.
Specification
|
Type |
DFFK-Y |
DFFK-S |
| Rated frequency |
50Hz |
50Hz |
| Working power supply |
AC400V±5% |
AC400V±5% |
| Control signal |
DC12V±20%，10～20mA |
DC12V±20%，10～20mA |
| The capacity of control capacitance |
5-15Kvar |
5-40Kvar |
| Response time |
≤100ms |
≤100ms |
| The time interval of on and off |
≥1s |
≥1s |
| The service life |
100,000 times |
100,000 times |
| The time interval of Connecting two times |
≥120s |
≥120s |
| Insulation grade |
Under normal atmospheric conditions≥10MΩ |
Under normal atmospheric conditions≥10MΩ |
| Power-cut protection |
The normal work in the system outage will be automatic shutdown. |
The normal work in the system outage will be automatic shutdown. |
| Physical dimension |
115×214×114.5mm |
115×214×114.5mm |
Service environment
|
Ambient temperature： |
-20℃～60℃ |
|
Relative humidity： |
25%～85%(at 25℃) |
|
Altitude： |
（1）It should be used at an altitude of 2000 meters below. |
|
Surrounding： |
（2）No flammables and explosives.
（3）No conductive medium.
（1）No corrosive gas and liquid.
（2）No snow and rain.
（3）Violent vibration and shock is not allowed. |
|
Transportation and storage： |
（1）Not to be stowed below other cargo.
（2）Don't throw down. |
|
Storage temperature： |
-30℃～85℃ |
Selection guide
|
Type |
The capacity of control capacitor
(KVAR) |
|
DFFK-40-S |
40(three-phase)） |
|
DFFK-30-S |
30(three-phase)） |
|
DFFK-20-S |
20(three-phase)） |
|
DFFK-15-S |
15(three-phase)） |
|
DFFK-10-S |
10(three-phase)） |
|
DFFK-3*15-Y |
15single-phase） |
|
DFFK-3*10-Y |
10(single-phase） |
|
DFFK-3*5-Y |
5(single-phase） |
Installation Method
Compound switch DFFK type is out-hanging structure, the upper and lower are respectively two screw holes. The compound switch can be fixed on the iron beam with four screws.
The boundary dimension of DFFK type intelligent compound switch: 115×214×114.5mm;
The dimension of installation holes: 99mm×178mm (length * width).
