Relay protection tester (also known as relay protection calibration device) can carry out overcurrent relay test, undervoltage relay test, overvoltage relay test, intermediate relay test, time relay test and other tests, that we use the relay protection tester to carry out these tests the specific method is how?
Overcurrent relay test:
Using the "AC test" program, when the relay operating current is less than 35A, you can choose a phase current as a variable, select the appropriate current step, using automatic or manual test, of which, the manual mode can be used to measure the action value and return value, the automatic mode can only measure the action value.
When the relay action current is greater than 35A, two-phase or three-phase parallel current output can be used, three-phase parallel current output value is 105A, then the phase of the parallel current must be in the same phase, otherwise parallel mode can not be used to select multiple currents as variables, using automatic or manual test can be used to measure the action value and return value of the relay.
Wiring mode: the relay tester's current into the relay current coil, the relay normally open contacts into the tester open into the amount of any one of the way.
Undervoltage relay test:
Undervoltage relay is also called low voltage relay, usually only normally closed contacts, normally closed contacts open relay action, you can choose a relatively high voltage value, and then reduce the voltage by a certain step until the relay action, the choice of "AC program", to be used in a manual way for the test, the first output of a voltage value, due to normally closed contacts, the screen will show the action of the relay. Contact, the screen will display the action time, the voltage value has not been cut, using manual rotation of the mouse, reduce the voltage until the action time value on the screen changes, this time that the relay is normally closed contact has been opened, the equivalent of the relay to return to the screen at this time to display the voltage value is the low-voltage relay action voltage value.
Over-voltage relay test:
Adopt "AC test" program. When the rated voltage of the relay is less than 120V, the single-phase voltage value can be used as a variable for testing.
Select the voltage step and the initial value of the voltage, the use of automatic or manual mode to carry out voltage changes until the relay action, can measure the action voltage and action time value, each phase voltage value of 120V, when the rated voltage of the relay under test is greater than 120V, two-phase voltage can be used to carry out the test, for example, when the VA = 75, VB = 75V, VA and VB phase difference of 180, line voltage VAB = 150V, so when the phase difference between the two phase voltages is 180? When the line voltage is equal to the sum of the two phase voltages, select the two-phase voltage can be varied, the use of automatic or manual test to test.
Intermediate relay test:
Use "DC test" program, the program single-phase voltage output range 0-10V current range 0-30A, when the intermediate relay rated voltage is less than 110V, with a single-phase voltage can be tested, you can choose a phase voltage, such as VA as a variable, set the voltage step, select the appropriate initial value, the start of the manual test. By left rotation, right rotation of the mouse to change the value of the voltage until the relay action, the automatic test is the voltage by step automatically increase or decrease until the relay action, the fruit of the rated voltage of the relay is greater than 110V, you can select the two-phase voltage to test, a phase voltage is positive, the other phase voltage is negative, the two-phase line voltage value of up to 220V, the use of automatic or manual test can be tested with the action voltage test, some of the Some intermediate relays are current-activated and voltage-retained, one-phase current can be selected as the variable, appropriate current step and initial value of current can be selected, and automatic or manual test can be used to change the current value until the relay is operated.
Time relay testing:
The rated voltage of the time relay is generally 220VDC, and in general, the relay can operate when the DC voltage is added to 140V.
(1) first measure the action voltage of the relay
The action time of the relay is set to 0.5s, the voltage step is set to -1.00, the time interval is set to 1s (should be greater than the action time of the relay), the VA is set to 110V, non-variable, the VB is set to 0V, the variable sign opens to "Y", the line voltage VAB connected to the voltage coil of the relay, the test mode is automatic. The test mode is automatic, the relay action access point is connected to the open channel, in which VA is positive and VB is negative, click "Start" that is, VA outputs 110V DC, and VB is reduced to negative voltage from the beginning until the relay action, for example, when VB=-40V when the relay action, it means that the relay action voltage is 150V, and it can be used to manually slowly change the voltage to make the relay action, and then turn on "Y", the variable flag is turned on. Can also be used manually to slowly change the voltage to make the relay action, and then change the voltage in the opposite direction to make the relay return, this time the voltage value is the return voltage of the relay.
(2) Measure the action time of the relay
Set VA as 110V, VB as -110V, VAB access to the relay voltage coil, the relay normally open contact into the tester's switching input channel, usually can be connected to 1 channel, the time interval should be set to be greater than the action time of the relay, the test mode is manual test, click "Start", you can measure the relay's The test mode is manual, click "Start", the action time of the relay can be measured.
The above is the operation procedure for the relay tester. If you want a more detailed operation process, please contact sisco, and we will be happy to assist you.