Simulate Speed to D-11
- Thread starter usabas1
- Start date
usabas1,
For a TMR, lift the magnetic speed pick up input wires at <R>, <S> & <T> QTBA- & - and PTBA-1 &-2, and -5 & -6 and -9 & -10 (on the<P> core). Run jumpers between <R>, <S> & <T> QTBA- and PTBA-1, --5 & -9; and between <R>, <S> & <T> QTBA- and PTBA-2, -6 & --10. Connect a frequency generator with a zero volt crossing output set to approximately 6 VAC RMS (the output signal can be a sine wave or a square wave or a saw-tooth--as long as it has O VDC offset and crosses the 0 VDC axis; it can't be a 0-5 VDC TTL output). to the high and low input signal jumper chains. That's all it takes. Zero-crossing output with no DC offset of about 6-10 VAC RMS, with the magnetic speed pick-ups disconnected (leaving the speed pick-ups connected loads most frequency generators too heavily, so just temporarily disconnect them and that issue usually goes away, unless the frequency generator is a weak, inexpensive one).
If the simulated speed input signal is increased too fast the <P> core will usually de-energize the Emergency Trip Relays (ETRs); it will be necessary to stop increasing the simulated speed input signal and give the unit a Master Reset to de-energize the ETRs until the testing/simulation is complete.
Sorry; I don't have a Mark V IO.ASG file to review to list the primary speed pick-up input terminals (at the QTBA- terminal boards). But, open IO.ASG on the Mark V operator interface to find the proper input terminals. Jumper the high input terminals together and the low input terminals together and connect one lead of the frequency generator output to the high terminal jumper chain and the other lead of the frequency generator output to the low terminal chain. It's not difficult nor is it rocket science. The important part is the zero-crossing frequency generator output.
Hope this helps!
For a TMR, lift the magnetic speed pick up input wires at <R>, <S> & <T> QTBA- & - and PTBA-1 &-2, and -5 & -6 and -9 & -10 (on the<P> core). Run jumpers between <R>, <S> & <T> QTBA- and PTBA-1, --5 & -9; and between <R>, <S> & <T> QTBA- and PTBA-2, -6 & --10. Connect a frequency generator with a zero volt crossing output set to approximately 6 VAC RMS (the output signal can be a sine wave or a square wave or a saw-tooth--as long as it has O VDC offset and crosses the 0 VDC axis; it can't be a 0-5 VDC TTL output). to the high and low input signal jumper chains. That's all it takes. Zero-crossing output with no DC offset of about 6-10 VAC RMS, with the magnetic speed pick-ups disconnected (leaving the speed pick-ups connected loads most frequency generators too heavily, so just temporarily disconnect them and that issue usually goes away, unless the frequency generator is a weak, inexpensive one).
If the simulated speed input signal is increased too fast the <P> core will usually de-energize the Emergency Trip Relays (ETRs); it will be necessary to stop increasing the simulated speed input signal and give the unit a Master Reset to de-energize the ETRs until the testing/simulation is complete.
Sorry; I don't have a Mark V IO.ASG file to review to list the primary speed pick-up input terminals (at the QTBA- terminal boards). But, open IO.ASG on the Mark V operator interface to find the proper input terminals. Jumper the high input terminals together and the low input terminals together and connect one lead of the frequency generator output to the high terminal jumper chain and the other lead of the frequency generator output to the low terminal chain. It's not difficult nor is it rocket science. The important part is the zero-crossing frequency generator output.
Hope this helps!
