◎ 固態(tài)繼電器三相移相觸發(fā)器模塊（SSR-3JK）

SOLID STATE RELAY THREE PHASE PHASE-SHIFT TRIGGER MODULE (SSR-3JK)

◆ 固態(tài)繼電器三相移相觸發(fā)器模塊 ( 以下簡稱 SSR-3JK) 內(nèi)部集三相電相位檢測 , 移相電路 , 控制電路和三路單相隨機(jī)型固態(tài)繼電器觸發(fā)電路于一體 , 在由我公司提供的三相同步變壓器模塊 ( 型號為 TB-3) 的支持下 ,不需外部任何電路或工作電源 , 便可以自動控制或電位器手動控制 , 產(chǎn)生三路可改變導(dǎo)通角度的脈沖信號再去分別控制三路單相隨機(jī)型固態(tài)繼電器 , 即可實現(xiàn)三相負(fù)載電壓從 0V 到電網(wǎng)全電壓的無級可調(diào)。

◆ 按控制信號的不同，SSR-3JK 分 E、F、G 和 H 型等四類，以下為規(guī)格型號表。

◆ The solid state relay three phase phase-shift trigger module (hereinafter referred to SSR- 3JK) integrates the three phase phase-detection circuit, the phase-shift circuit, the control circuit

and the trigger circuit of three single phase random conduction type solid state relays. With the support of the three phase synchronous transformer module (TB-3) provided by our company and no requirement for the external circuit or power supply, by the automatic control method or manual control method (i.e. the external potentiometer), three pulse signals which can change the conduction angle will be generated to control three single phase random conduction type solid state relays respectively, which means the voltage amplitude of the three phase load can be continuously adjusted from 0V to the maximum voltage of the power grid. 

◆ According to different control signals, SSR-3JK can be divided into four types: E, F, G, and H types. The following is the specification model table.

◎ 有關(guān)技術(shù)指標(biāo)及應(yīng)注意的問題 Related technical specifications and precautions

1. 整個電路可應(yīng)用于 380VAC (300~420VAC), 50Hz電網(wǎng)上 , 主電路中三相進(jìn)線 (R, S, T) 無相序要求 , 但進(jìn)線和固態(tài)繼電器 , TB-3, SSR-3JK 輸出端間 ( 如 T 對應(yīng)的 SSR1 和 CON1) 必須嚴(yán)格一一對應(yīng) , 否則系統(tǒng)不能正常工作。

2.CON 對 COM 必須為正 , 如極性相反則輸出端失控( 全開或全閉 ). 當(dāng)控制端 CON 從 0~5V 改變時 , 交流負(fù)載上的電壓從0V到最大值可調(diào)(對阻性負(fù)載而言).其中 CON 在 0~0.8V 左右時為全關(guān)閉區(qū)域 , 能可靠關(guān)斷模塊的輸出 ; CON 在 0.8V~4.6V 左右為可調(diào)區(qū)域 , 即隨著控制電壓的增大 , 導(dǎo)通角 α 從 180°到 0°線性減小 , 交流負(fù)載上的電壓從 0V 增大到最大值 ; CON 在4.6V~5V 左右時為全開通區(qū)域 , 交流負(fù)載上的電壓為最大值 ( 接近電網(wǎng)電壓 )。

3. CON 對 COM 的輸入阻抗分 E, F 和 H 型均為大于等于 30KΩ; G 型為 250Ω. +5V 電壓信號只提供給手控電位器用 , 不做他用 , 所選用的電位器阻值在 2~10KΩ間 , 注 : 4~20mA 的 G 型不能用電位器手動調(diào)節(jié) , 此時+5V 端也沒有用處。

4.SSR-3JK的四個COM在模塊內(nèi)部均相連, 為弱電”地”, ( 與同步變壓器的中性線的”地 N 為全隔離”) 在自動控制方式時與外電路控制的直流”地”相連。

5. 三相負(fù)載的三相功率應(yīng)均衡 . 負(fù)載為 Y 形接法時 , Y的中心點接與不接中性線均可 , 但接中性線時高次諧波對電網(wǎng)干擾要比不接中性線時大 . 同步變壓器 TB-3 上的 N 線必須可靠接地 ( 中性線 )。6.SSR-3JK 和 TB-3 本身發(fā)熱很小 , 不需要安裝在散熱器上。

7. 三相交流異步電機(jī)的調(diào)速應(yīng)采用變頻器 , 只有風(fēng)機(jī)類 ,水泵類電機(jī)在要求不高的場合可采用三相調(diào)壓模塊 . 三相電機(jī)軟啟動應(yīng)采用電壓 , 電流閉環(huán)控制。

8. 由于 SSR-3JK 一方面通過同步變壓器 TB-3 與電網(wǎng)隔離 , 另一方面通過三路固態(tài)繼電器與電網(wǎng)隔離 , 因此SSR-3JK 模塊在弱電工作下極為可靠 , 并且即使三相負(fù)載發(fā)生短路而燒毀固態(tài)繼電器后 , SSR-3JK 也不會損壞 . 由于這一原因 , 由 SSR-3JK 組成的三相調(diào)壓系統(tǒng)比較合理 : 一方面比我公司生產(chǎn)的三相移相觸發(fā)器模塊調(diào)壓系統(tǒng) (SX-JKA 加六個單向可控硅 ) 連接更為簡便可靠 , 即使產(chǎn)生故障造成的損失也比較小 (SSR-3JK系統(tǒng)短路時只損失一只或兩只 SSR, 而 SX-JKA 系統(tǒng)不但損失可控硅 , 而且還可能造成 SX-JKA 模塊的損壞 ); 另一方面也比我們公司或其他公司生產(chǎn)的三相調(diào)壓模塊 ( 移相觸發(fā)電路與可控硅為一體 ) 更為可靠 , 因為三相調(diào)壓模塊集六個單向可控硅于一體 , 由于體積小發(fā)熱量大 , 散熱不良而造成不可靠 , 在負(fù)載過流時所造成的損失則更不能相提并論。SSR-3JK( 帶 TB-3) 與我公司生產(chǎn)的隨機(jī)型固態(tài)繼電器相匹配 , 用戶可通過購買 SSR-3JK, TB-3, 三只隨機(jī)型 SSR 和一塊散熱器來搭建 SSR-3JK 系統(tǒng) ( 其中三只長條狀固態(tài)繼電器可安裝在帶風(fēng)扇的 Y 系列模塊專用散熱器上 ; 三只長方狀固態(tài)繼電器可安裝在 MG-Y 的散熱器上作為一個功率單元 )。

1.  The entire circuit can be applied to 380VAC (300~420VAC), 50Hz power grid. The three phase input cables (R, S, T) in the main circuit has no phase sequence requirements, but the input cables must be strict one-to-one correspondence with the output terminals of the solid state relay, TB-3, and SSR-3JK (such as T corresponding to SSR1 and CON1), otherwise the system will not work normally.

2.CON must be positive relative to COM, and if the polarity is opposite, the output terminal will be out of control (fully open or fully closed). When the control terminal CON changes from 0V to 5V, the voltage on the AC load can be adjusted from 0V to the maximum value (for resistive loads). When the control voltage on CON is around 0V~0.8V (Fully- closed Region), the control signal can reliably shut down the output of the module. When the control voltage on CON is around 0.8V~4.6V (Adjustable Region), the conduction angle α decreases linearly from 180° to 0° as the control voltage increases, and the voltage on the AC load increases from 0V to the maximum value. When the control voltage on CON is around 4.6V~5V (Full-open Region), the voltage on the AC load is the maximum value (close to the power grid voltage).

3. The input impedance between CON and COM is divided into E, F and H type (the impedance of these three types are greater than or equal to 30KΩ), and G type (the impedance is 250Ω). The +5V voltage signal is only provided for the manual potentiometer (the selected resistance is between 2~10KΩ), not for other uses. Note: The G type (4~20mA as control signal) cannot be manually adjusted by the potentiometer, so the +5V port is useless for the G type.

4. The four COM ports of the SSR-3JK are connected together inside the module to form the weak current “earth ground” (fully isolated with the neutral line “N line” of the synchronous transformer), which will be connected to the DC “earth ground” controlled by the external circuit when choose the automatic control mode.

5.  The power of the three phase load should be balanced. When the load uses the Y-connection method, the center point Y can be connected or not connected to the neutral line. However, the high- order harmonic interference to the power grid when connected to the neutral line is larger than that when not connected to the neutral line. The N line on the synchronous transformer TB-3 must be reliably connected to the earth ground (the neutral line). 

6. SSR-3JK and TB-3 generate very little heat and  do not need to be mounted on a heat sink.

7. The speed control of the three phase AC asynchronous motor should be adjusted by the frequency converter, while the three phase voltage regulation module can only be applied to fan motors and pump motors where the requirements are not high. For the soft start of the three phase motors, the voltage/current closed-loop control system should be used.

8. Since the SSR-3JK is isolated from the power grid by the synchronous transformer TB-3 on the one hand and isolated from the power grid by three solid state relays on the other hand, the SSR-3JK module is extremely reliable under weak current operation, and will not be damaged even if the three phase load is burned due to short-circuit. For this reason, it is reasonable to choose the three phase voltage regulation system consisting of SSR-3JK (here refers to SSR-3JK system): 

Firstly, compared with the three phase phase-shift module voltage-regulation system (here refers to SX-JKA system consisting of SX-JKA an