Operating Instructions for Using External Synchronization with High-Voltage Switch Dynamic Characteristic Tester
1. If the current of the driving relay of the tested switch is greater than 10A, an external synchronization method should be used; that is, instead of using the opening and closing control provided by the device itself, the opening and closing control of the tested switch should be utilized to make the switch operate. The specific method is as follows:
Move the toggle switch on the panel to the “external synchronization” position.
2. Connect the external trigger terminal of the panel to a certain point of the tested switch drive mechanism. This point should be able to reflect the start of the drive action. For the tester, when the external trigger signal changes from a high level (+5V) to a low level (0V), the high-voltage switch dynamic characteristic tester will know that the test has begun. The external trigger can be achieved through a contactor.
3. Follow the instructions provided by the high-voltage switch dynamic characteristic tester. When the screen displays the text “Testing in progress”, you can then activate the operating mechanism of the test subject switch; at this point, the signal can be detected by the tester.
4. When the device prompts “Please set the test time”, you can use the up and down arrow keys to select the test time. The maximum can reach 12.5 seconds. For the external synchronization mode, this time is sufficient for the test personnel to press the test button and then start the operation mechanism of the switch.
5. The external synchronization method is the same as the internal synchronization test. The signal of the tested break point must be connected to the common terminal at one end and to one of the terminals of “A–L” at the other end. The difference between these two methods lies in that the internal synchronization signal is provided by the equipment for opening and closing control; while the external synchronization signal is controlled by the test personnel and is not driven by the output signal of the equipment itself. The external synchronization method is more flexible and can be controlled independently by the test personnel.
How to use the contactor
The selection principle for contactors is as follows: the rated current should be no less than 10A, and there should be at least 3 pairs of normally open contacts. When the contactor operates, all 3 pairs of normally open contacts should be closed. For this tester, this contactor can be used to control the operation of the high-voltage switch and simultaneously provide a test start signal for the tester. The wiring method is as follows:
First, the opposite terminals of the on-off switch in the field should be connected to the corresponding terminals of the contactor.
2. Then, connect the “ground terminal” and the “external trigger terminal” on the panel of this high-voltage switch dynamic characteristic tester to the other pair of terminals of the contactor.
3. The tester controls the contactor. When the contactor operates, it will trigger the high-voltage switch to actuate, and at the same time, a test start signal will be given.
Note: Before the contactor is activated, the tester should be in the external synchronization state (i.e., the switch on the panel should be set to external synchronization), and enter the “Testing in Progress” state. If the tester is concerned that the test cannot be completed within 3 seconds, the test time can be adjusted using the “↑” and “↓” keys, up to a maximum of 12.5 seconds. During the test time setting, the tester will wait for the trigger signal to arrive continuously. Once the trigger signal arrives, the tester will start testing the signals at each contact point until the test time is completed. For the trip test, the wiring is exactly the same as in the above diagram, only the closing coil terminals are replaced with the tripping coil terminals.
Post time: Apr-10-2026