15
move in a straight line, and fix the sensor with a magnetic universal bracket. The method is similar for SF6
switch and oil switch.
IX On-site common problems
9.1 On-site closing and opening control wiring is incorrect or there is a problem in the control loop
Find the control wiring diagram of the on-site control cabinet and ask relevant professionals to find
the closing and opening coils and switch auxiliary contacts respectively. Refer to Appendix II of this
manual for control wiring diagrams and instructions for rewiring. Check the control circuit to ensure that
the circuit is unblocked.
9.2 The instrument prompts "Power supply current output exceeds limit, over-current
protection action"
a. It is possible that the output of the instrument is short-circuited due to the wrong control wiring, which
causes the short-circuit protection function to start, and the instrument "closes and opens the control
power" has no output. Shut down at this time, and check the wiring again according to the first item
above.
b. The instrument may not be driven normally due to the excessive coil load on site.
①
For the switch of the electromagnetic mechanism, the driving current required by the switch closing
coil is large (up to 100A or several hundred amps), and the maximum load capacity of the instrument
operating power supply is 15A. As a result, the load is too large and the instrument cannot be driven
normally. Generally, the closing control line is connected to the closing contactor coil in front of the
closing coil, and the switch contactor is controlled by the instrument. The contactor is used to drive the
switch closing coil to make the switch act. "Trigger" mode operation switch closes.
②
For the switch of hydraulic and spring mechanism, the default is “excessive load” when the output
current of the instrument is greater than 6A. Please take a look or use a multimeter to measure the
