The power supply over-voltage protection (OVP) is designed as a DUT protection mechanism to avoid supplying excessive voltage to the device under test (DUT) or circuit under test (DUC).

Three possible overvoltage (OVP) scenarios are provided below.

Scenario 1: Users forget that the overvoltage protection was set for the last project, and the voltage of this test project is higher than the overvoltage protection setting value.

For example: the OVP of the last project was set to 12.5V, the required voltage of this project is 15V, and the set output voltage is higher than the 12.5V of the overvoltage protection, so the power supply starts the protection mechanism to stop the output.

Scenario 2: After connecting the remote compensation, the output of the power supply is higher than the overvoltage protection setting value due to compensation

For example: the working voltage of the circuit is 12V, and the overvoltage protection is set to 12.5V. Due to the excessive loss from wiring, a voltage drop of 0.6V is caused on the wiring, resulting in only 11.4V voltage of the DUT. The power supply starts to compensate, and the compensation reaches 12.5V, the DUT is 11.9V, and the overvoltage setting value of 12.5V is exceeded after compensation, so the power supply starts the protection mechanism to stop the output.

Scenario 3: Due to the inductance of the test lead, at the moment of the power supply switching or the moment of the programmable voltage change, the stray components on the lead cause LC resonance, and the transient voltage during the voltage change exceeds the OVP protection voltage setting value.

Fan is a component that ensures heat dissipation and ensures the normal operation of the power supply.

The PSU series power supply will stop output when there is a fan fail message.

When the fan is in the critical state of failure, the phenomenon of good and bad sometimes causes the failure prompt of Fan Fail indicator to flash.

When your power supply keeps showing Fan Fail prompt, please contact your nearest GW Instek Service Center services@goodwill.com.tw 

Routine maintenance precautions:

1. Avoid dust accumulation in the fan
2. There is a certain cooling distance between the fan and the desktop or wall

The measurement function of the ASR series AC/DC power supply can be performed through the free software to perform data logging (Data Logger)

The software diagram is as follows

Figure 1 Data logging of ASR measurement parameters

Figure 2 Harmonic data logging

For free software, please click the link below, file download option, registered members can download for free after login

https://www.gwinstek.com/en-global/products/detail/ASR-3000

Single phase 220V (B type)

3kW model

Terminal rated voltage and current: 400V, 41A

Locking screw: M4

Locking terminal restrictions: inner diameter greater than 4mm, outer diameter less than 9mm

Part No.: 39BT-00301301 (BLOCK TERMINAL 0168-2303, 300V, 30A ,3P ,RoHS)

4.5kW, 6kW models

Terminal rated voltage and current: 1000V, 76A

Locking screw: M5

Locking terminal restrictions: inner diameter greater than 5mm, outer diameter less than 13mm

Part No.: 39BT-00301401 (BLOCK TERMINAL 0168-4103,600V,115A ,3P ,RoHS)

Three-phase 220V (C type)

4.5W, 6kW models

Terminal rated voltage and current: 1000V, 76A

Locking screw: M5

Locking terminal restrictions: inner diameter greater than 5mm, outer diameter less than 13mm

Part No: 39BT-00401501 (BLOCK TERMINAL 0168-4104, 600V, 115A ,4P ,RoHS)

Three-phase 400V (D type)

4.5W, 6kW models

Terminal rated voltage and current: 1000V, 76A

Locking screw: M5

Locking terminal restrictions: inner diameter greater than 5mm, outer diameter less than 13mm

Part No.: 39BT-00500701 (BLOCK TERMINAL 0168-4105, 600V, 115A ,5P ,RoHS)

For other details, please refer to the link below:

https://paper.dropbox.com/doc/PSU-3KW6KW-AC-input-terminal-specification-rfm3pTQd7P6jo3BDIYBi0

The electronic load verifying the LED driver not only has the functions of a general electronic load (CC, CR, CV, CP), but also must be able to simulate the load characteristics of the LED, set the forward bias (Vd) and the on-resistance ( Rd), etc. In addition, the built-in dimming control signal output is convenient for the PWM dimming test of the LED driver.

The dedicated electronic loads that GW Instek supports for LED driver testing are as follows:

• Must be installed on  3302G mainframe [single channel], 3305G [two channels] or 3300G [four channels], and the mainframe has 150 sets of store/recall memory
• 341G LED DC Electronic Load Simulator 300V, 24A, 300W
• 3342G LED DC Electronic Load Simulator 500V, 12A, 300W
• 3343G LED DC Electronic Load Simulator 500V, 24A, 300W
• 3345G LED DC Electronic Load Simulator 120V, 4A, 150W
• 3346G LED DC Electronic Load Simulator 120V, 12A, 300W
• 33401G LED DC Electronic Load Simulator 500V, 6A, 150W*2
• 33402G LED DC Electronic Load Simulator 120V, 2A, 75Wx2
• 33403G LED DC Electronic Load Simulator 120V, 6A, 150Wx2

• The power input dimming frequency of 3345G & 33402G can reach 25KHz, which is the fastest and widest bandwidth electronic load in the market
• The dimming control output of 3345G & 33402G is DC~10KHz (other models are DC~1kHz)

The remote sensing (Please refer our user manual) compensates for the cable loss for up to 0.5V. If the output level goes much higher, the remote sensing terminal might be disconnected. Make sure the connection is secure. Please refer our user manual page32 for details.

Auto Running Operation The function must be used together with the DELAY setting which is defined as the operation delay time of next running operation. The Delay function is workable only under Auto Running operation. Auto Running Operation The function must be used together with the DELAY setting which is defined as the operation delay time of next running operation. The Delay function is workable only under Auto Running operation. 

1)Delay time setting: Press [DELAY] to set the panel operation to Delay time setting selection. 

2)The setting and store of very group of data: A group setting includes the Output range, Output voltage value, Output current value, Over Voltage protection level, Over Current protection level, Over Voltage status (ON/OFF), and Delay time. User can proceed the setting and store it to the memory bank group by group up to 100 groups maximum. 

3)Recall range setting (Auto running operation range): Regarding the setting description, please refer to AUTO RANGE operation. 

4)Enter AUTO mode by pressing [AUTO], now, the operation is in the auto running function by pressing [OUTPUT]. 

5)Under this mode, press [SHIFT][AUTO INFO] can monitor the current operation setting address and operation time.

The following scenarios are possible:The following scenarios are possible:

• The rear panel remote control terminal is in the Off position. In this case, set it to the On position or deactivate remote control. For details, please refer see our user manual page39.

• The OVP setting switch on the rear panel is on the SET side. In this case, set the switch to the Normal side.

•The OVP indicator is red. In this case, change the OVP setting to higher value or remove the over voltage condition. 

*Note that in several conditions, the Output key automatically turns Off to avoid harmful condition. For details, please refer our user manual.

Regarding to verify the power supply specifications please make sure the power supply is powered on at least 30 minutes,within +20℃ ～ -30℃.

When using [User Special Function]->, select option 5. Add New Module and a message “ Invalid License” pop up

Check if the firmware version is too old? If it is lower than V2.10, please update to this version

1 Download the firmware version V2.10, there are a total of three files gw.sbt

https://www.dropbox.com/s/mlnsgpfu3xkbecs/gw.sbt?dl=0

https://www.dropbox.com/s/59m3kvvygpx9g98/gw_aps_uboot.blk?dl=0

https://www.dropbox.com/s/o981erg6zpxbah2/gw_aps_kernel.blk?dl=0

2 Create a GW folder in the root directory of the USB Flash Drive formatted as FAT-32.

3 Copy the downloaded file gw.sbt to the \gw folder of this USB Flash Drive

4 Insert the USB Flash Drive into the USB port on the front panel of the APS

5 Press MENU

6 Turn the knob to 11. Special Function and press Enter

7 Enter the password "5004"

8 Turn the knob to 1. Update Firmware and press Enter, there will be no screen update for a while

9 Turn the knob to 2. Update Boot and press Enter, there will be no screen update for a while

10 Turn the knob to 3. Update Kernel and press Enter, there will be no screen update for a while

Storing and Recalling Operating:

(1)The storing setting function including the store of the Output range, Output voltage value, Output current value, Over Voltage protection level, Over Current protection level, Over Voltage protection status, Over Current protection status and the Delay time.
(2)Store the present setting status to the memory bank: Press [SHIFT][STORE], set the panel operation to Storing setting selection, input the memory address by using number key (When want to correct the input value due to error key-in, can use wheel knob to clear the error value and re-input the value), then press [ENTER] to complete the change of store, and the panel will display “DONE” message.
(3)Recall the setting status from the memory bank: Press [SHIFT][RECALL], set the panel operation to Recall setting, use the number key to recall the desired memory address (When want to correct the input value due to error key-in, can use wheel knob to clear the error value and re-input the value), then press [ENTER] to complete the change, and the panel will display “DONE” message.

This indicates there is an internal error. Please Contact the service center.