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When using an external field power supply for the opening and closing control, the "internal power
supply" is not wired. When the switch is single-tested, two wires “externally triggered” are connected to
both ends of the brake coil; when the switch is single-tested, the two wires “externally triggered” are
connected to both ends of the open-circuit coil. When operating with an external power supply, use the
"external trigger" method. External trigger mode can be tested regardless of whether the switching
mechanism is AC or DC.
8.3 Sensor connection
This machine provides two types of sensors: angle and displacement. Select the appropriate
sensor according to the measured switch. For some imported and joint-venture switches, the linear drive
part is enclosed inside the switch body. When the switch manufacturer leaves the factory for speed tests,
the switches are tested on the switch opening and closing indicators or rotary shafts. In this case, angle
sensors are used. The axis of the rotation sensor should be kept concentric with the axis of the switch as
much as possible, otherwise the rotation of the sensor will be hindered, and the burr of the measured
curve will be very heavy, which will affect the accuracy of the test data.
If you need to measure the stroke of the switch very accurately, you need a linear sensor. There are
three types of linear sensors: 50mm, 200mm and 300mm. 50mm linear sensor is used to measure the
travel speed of vacuum switch; 200mm, 300mm is used to measure the SF6 switch travel and speed
These two sensors are non-standard configurations. Take a certain type of vacuum switch as an example,
as shown below. When installing the linear resistance sensor, ensure that the sensor's moving axis can
