Industrial Aluminium Profiles,Aluminum Heat Sink Profile,Mobie Phone Base Aluminum Profile,Electrical Aluminum Extrusion Profile Guangdong Jihua Aluminium Co., LTD , https://www.jihua-alu.com
4.1 Inspection or preparation before use The instrument should be visually inspected before use, and the three-core power cord grounding terminal should be grounded reliably. Then the instrument is energized. At this time, the two meter heads should be in the bright state, try to open the stopwatch power switch, stopwatch switch Should be normal. Touch the “Output Select†button switch by hand, and the output status indicator should be normal from left to right.
4.2 Main circuit voltage output operation Select the output status as "AC0-250V", press the main circuit "Output control switch" in the lower right corner of the test box, and slowly adjust the large knob of the voltage regulator. At this time, the voltage/current meter should have "0- 250V AC voltage display. To output "DC0-350V", the output state is selected in the "DC0-350V" file, and the adjustment method is the same as above.
4.3 relay protection test box JDS-2000 main circuit current output operation Select the output status in the "AC0-10A" file, press the main circuit "output control switch" slowly adjust the pressure knob, at this time, the voltage / current meter should There is "0-10A" current display, other current regulators are similar to this method.
4.4 Sub-circuit output operation Press the auxiliary circuit "output control" switch, slowly adjust the small knob, in the auxiliary circuit output terminal, there is AC "0-20V", "0-250V", DC "0-350V", output, This output is not monitored on the voltage/current meter.
Keywords: Relay Protection Test Chamber JDS-2000, Relay Protection Test Chamber JDS-2000, Relay Protection Test Chamber JDS-2000 4.5 Usage Example 4.5.1 Voltage Relay Pick-up and Release Test First place the instrument In the ready state, the relay coil of the test object is connected to the corresponding voltage output terminal. Press the “output control†switch and slowly adjust the large knob to make the output voltage rise steadily. When the relay pulls in, record the pull-in voltage and adjust it in the opposite direction. Rotate the knob to release the relay and record the release voltage. Based on this, calculate the relay return coefficient of the test. If the test relay is an over-voltage relay, it will go in the opposite direction.
4.5.2 Current relay setting value test Release the tested relay from the line and connect it to the current output terminal of the instrument. Select the appropriate output current file, for example, “0-10V†or “0-100Aâ€, and press “ "Output control" switch, slowly adjust the large knob to the relay action, observe the voltage / ammeter value, determine the relay action.
4.5.3 Determination of time relay delay time Connect the tested relay to the output terminal (according to the requirements of the relay, determine the working voltage as AC or DC), adjust the rated operating value, and restore the power. The stopwatch should be turned on and cleared at this time. The relay to be tested should be connected to the stopwatch terminal by delay. The “output control†switch should be pressed to obtain the rated working voltage of the relay coil and start the stopwatch at the same time. After that, the stopwatch count stops. At this time, the number displayed on the stopwatch is the delay closure time of the time relay. If you want to measure the delay release, the principle is the same as before. The actual wiring is the opposite.
4.5.4 Intermediate relay test (with holding coil)
Determine the type of action (voltage or current action) of the relay being tested and what type of hold (voltage or current hold). Take the current operating voltage as an example (DC relay), select a DC current output file (0-500mA or 0-10A), press the "output control" switch, slowly adjust the large knob to the relay action, write down the operating current, and then Connect the auxiliary loop output to the relay holding coil end, slowly adjust the small knob to the relay rated value, record the holding voltage value, and determine the relay's good or bad according to the action or holding condition.
In short, as long as you have mastered the conversion relationship between the output of each instrument and the measuring instrument, you can use it in accordance with the specific conditions of the tested relay.
JDS-2000 relay protection test box main features:
L relay protection test box JDS-2000 test relay types: current relays, voltage relays, reclosing relays, intermediate relays, differential relays;
l Instrument equipped with a fixed value output can be used as a separate voltage source;
l digital display, intuitive readings;
lJDS-2000 relay protection test box is compact, lightweight, easy to carry and handle.
The latest technical parameters reference: http://. . Com
How to Use JDS-2000 Relay Protection Test Chamber
JDS-2000 relay protection test box use method: