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MGR-STY Series
Voltage Power Regulator

MGR-STY Series Voltage Power Regulator

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Introduction


MGR-STY Series Full Isolation Three Phase AC Solid State Voltage Regulator Module (also known as " MGR-ST Series ") integrates the three phase phase-detection circuit, the phase-shift circuit, the trigger circuit and three sets of reverse-parallel (back-to-back) power SCR thyristors. MGR-STY Series can control the trigger angle (Conduction Angle) of the thyristor (Phase Angle Control) automatically (Control Signal) or manually (External Potentiometer) to adjust the voltage amplitude of the three phase load from 0V to the maximum power grid voltage. Our TB-3 three phase synchronous transformer module (co-sold with MGR-STY Series) provides the synchronous signal and internal operation power supply for the voltage regulator module, so users have no needs for any external circuit or power supply. According to different control signals (CON), MGR-STY Series can be divided into E type, F type, G type, and H type.

How to order


How to order MGR-STY Series Voltage Power Regulator

MGR-STY (Full Isolation Three Phase Voltage Regulator Module)
  - [Load Voltage] {-380D (380VAC)}
  - [Rated Current]
  - [Control Signal] {-E (0-5VDC); -F (0-10VDC); -G (4-20mA); -H (1-5VDC)}

Parameters


MGR-STY Series img

MGR-STY Series

Control Signal:  E: CON 0-5V; F: CON 0-10V; G: CON 4-20mA; H: CON 1-5V
*(E, F, H types can be controlled by the manual control circuit, G type cannot be adjusted with the potentiometer)
Load Voltage:  Three phase, 380VAC, 50Hz
Synchronous Signal & Power Source:  TB-3 (three phase synchronous transformer module) provides the synchronous signal and internal operation power supply for the voltage regulator module without additional circuit
Load Current:  35A, 75A, 120A, 150A
(Note: The current grade above is the maximum rms current of one set of the reverse-parallel SCR thyristors)
Dimensions & Mounting:  105mm*74mm*33mm; Panel mount solid state module with plastic cover, metal base and screw terminals

Features


● Modularization with high pressure resistant, safer and more reliable
● Miniaturization with convenience for installation, wiring and etc.
● Linear phase-shift control circuit with good stability and high precision
● Integrates the synchronous transformer, the phase detection circuit, the phase-shift trigger circuit and the thyristor output circuit.
● Complete electrical isolation between control signals and load signals
● LED status indicator
● Low output off-state leakage current
● Low output on-state voltage drop
● Standard output RC snubber circuit
● Transparent cover for extra protection

Dimensions and Circuit Wiring Diagram


MGR-STY Series Voltage Power Regulator

MGR-STY Series Voltage Power Regulator Diagram

Take E type (CON 0~5V) as an example:
● The R, S, T ports of the MGR-STY module and the R, S, T ports of the TB-3 module should be connected to the L1, L2, L3 ports of the power grid (no phase sequence requirement, but the R, S, T ports of these two modules should be connected one-to-one), and the N line of the synchronous transformer module should be grounded. And U, V, W ports should be connected to three phase load (Y or △ connection are all available). The r1, r2, s1, s2, t1, t2 ports of MGR-STY module and the r1, r2, s1, s2, t1, t2 ports of the TB-3 module are connected through terminal strips (plugged together to connect directly). COM port is the internal common ground terminal, CON port is the control terminal, and the +5V port is the power supply generated inside the module only for the manual control of potentiometer. And the strong current part (T, S, R, N, U, W ports) and the weak current part (r1, r2, s1, s2, t1, t2, +5V, CON, COM ports) are fully isolated, and these two parts should be controlled by the automatic control method or manual control method.

Application


● Applications that need voltage adjustment.

Precautions and FAQs


● The circuit consisting of three phase voltage regulator module and three phase synchronous transformer module TB-3 can be applied to 380VAC (300~420VAC), 50Hz power grid.
● 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).
● 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.
● The insulation voltage between the strong current part, the weak current part, and the module backplane is greater than 2000VAC.
● The heat of the whole module = Actual load current (Amps) * 1.5 W/Amps. Customers can select MG-Y, MG-H series heat sink according to actual needs.
● 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 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.
● The N line on the three phase synchronous transformer module TB-3 must be reliably grounded. And the TB-3 is sold together with the three phase voltage regulator module.
● It is recommended to use the voltage regulation system consisting of the SSR-3JK and three random conduction type solid state relays for three phase AC voltage regulation.
● For specifications and precautions for selecting the current grade, device protection, etc., please refer to the instruction of single phase AC solid state relays.

All Regular Models We Offer


● MGR-STY Series (Three Phase, Full Isolation)

Load Voltage Three Phase 380VAC, Control Signal: CON 0-5V; Full Wave

  • MGR-STY380D35E
  • MGR-STY380D75E
  • MGR-STY380D120E
  • MGR-STY380D150E

Load Voltage Three Phase 380VAC, Control Signal: CON 0-10V; Full Wave

  • MGR-STY380D35F
  • MGR-STY380D75F
  • MGR-STY380D120F
  • MGR-STY380D150F

Load Voltage Three Phase 380VAC, Control Signal: CON 4-20mA; Full Wave

  • MGR-STY380D35G
  • MGR-STY380D75G
  • MGR-STY380D120G
  • MGR-STY380D150G

Load Voltage Three Phase 380VAC, Control Signal: CON 1-5V; Full Wave

  • MGR-STY380D35H
  • MGR-STY380D75H
  • MGR-STY380D120H
  • MGR-STY380D150H

(E type: CON 0-5V; F type: CON 0-10V; G type: CON 4-20mA; H type: CON 1-5V)

*Customized models are available, be free to contact us.

Tips

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