3 Phase Thyristor Power Regulator, 120A-250A

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Model: PEACO-HNSCR-LA-ZQ
SKU: PEACO-HNSCR-LA-ZQ

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$415.59

Ex Tax: $415.59

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3-phase thyristor power regulator provides high current (120A, 150A, 200A, 250A) with good stability, control signal up to 4-20mA, 0-5V DC, and 0-10V DC. SCR power regulator is suitable for high precision and accurate temperature control. The main circuit of this 3-phase power regulator adopts only 3 wires load with no neutral.

Features

1. The thyristor power regulator adopts multipurpose LED indication for working condition, has good quality, and a longer service life.

2. The max. and min. SCR power regulator output is adjustable, with good stability performance, heat dissipation, and high precision.

3. The 3-phase SCR power regulator features an over-temperature protective function.

4. The main circuit adopts a three-phase three-wire input without any phase sequence.

5. The power regulator SCR is suitable only for resistive loads such as heaters, bulbs, tubes, ovens, furnaces, etc.

6. The PCB control board of the power regulator adopts SMT production, with a separate control method, withstanding voltage, current resistance, maintenance, and no interference.

Specification

Model	PEACO-HNSCR-LA-ZQ
Rated Voltage	Three-phase 380VAC (three-phase three-wire) 380±15%
Rated Current*	120A, 150A	200A	250A
Dimension (WLH)	170260250mm	170310250mm	170360250mm
Installation Dimension (W*L)	150*150mm	150*200mm	150*250mm
Frequency	50Hz/60Hz
Output Mode	Phase output
Control Signal*	4-20mA, 0-5V DC, 0-10V DC
Protection Function	Auto-protection for over-temperature
Environment	＜45℃
Humidity	＜90% RH
Certification	CE
Weight	4kg-9kg

SCR Power Regulator Wiring Diagram

Automatic Adjustment

Phase Control

Warning

1. For the Y connection load, the center of Y should not be connected with zero line, otherwise, the SCR power regulator will lose control.

2. When the radiator temperature exceeds 75℃, the module will stop working automatically and only the power indicating light will be bright.

3. The SCR power regulator is a product with massive current, please note that terminals (R.S.T) and (U.V.W) shall be locked tightly, otherwise, the SCR power regulator will be burned by terminal heating.

The main circuit of this 3-phase thyristor power regulator adopts only 3 wires load with no neutral.

Selection table for 3-phase thyristor power regulator based on load
External signal control 0-100%output
External signal control and VR adjustable 0-100%
Manual VR adjustment 0-100%output (signal switching to 0-5V)
External alarm switch output

Malfunction and Corrective Action:

1) Yellow light

Possible Root Cause: The quick fuse is disconnected.
Detection method: Disconnect all power sources, open the panel, and use a multimeter to block the three fast fuses. If the resistance is infinite, it will be broken. Please replace it.

2) No output (load does not work)

Root Cause: no input to the working power supply.
Detection method: Use the multimeter V file to measure whether there is AC220V at both ends of the working power supply.

3) No input to the control signal

Root Cause: no input to the control signal.
Detection method: use the multimeter V file to measure the two ends of the control signal, the red pen is placed on the "+" terminal, and the black pen is placed on the "-" terminal. If the multimeter shows less than 1.2V. The control signal input is abnormal. (At normal full power output, the voltage between these two terminals is DC5V)

4) Three-phase power has no input

Root Cause: three-phase power has no input
Detection method: Use the multimeter V~ block to measure the voltage between R, S, and T. If there is no AC380V, the three-phase power is not input.

5) Half output, disconnect the control signal, the load can not be completely shut down (load voltage meter shows 110V or so)

Root Cause: the center point of the load Y-type connection is connected to the zero line.
Corrective Action: Disconnect the zero line.

6. The load is unbalanced

Root Cause: The load on one phase is disconnected.
Detection method: Use the multimeter resistance file to measure the resistance values at both ends of three sets of loads. Detect the burnt load and replace it before use.

7) SCR breakdown

Detection method: After disconnecting the load, use the multimeter resistance file to measure R and U, S and V, and a short circuit between T and W. If there is a short circuit, indicating that the SCR has broken down.

3 Phase Thyristor Power Regulator, 120A-250A

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