Application Note. Increase Voltage Output of AC Source by paralleling two (2) or Series from 300VAC up to 600VAC.

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1 Application Note Product: AC Source Series: Series Date: August 27, 2008 Title: AC Source in Series Scope: Increase Voltage Output of AC Source by paralleling two (2) or Series from 300VAC up to 600VAC Example LIST Mode 220V/0.5 sec L N Slave L or Fixed Mode 230V Synchronizing signal L Master N UUT N Example 2

2 Setup: The user can use two units of AC source 61600/61500 in series to get higher voltage. 1. On CHOICE PAGE, press 3 then press ENTER, choose the OUTPUT functional list. PAGE CHOICE = 3_ 1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI COUPLE = AC+DC_ DEG ON= 0.0 OFF=IMMED Vs (V/ms) = Fs (Hz/ms) = DCs (V/ms) = Press SHIFT, then to change to go to next page. 3-PHASE MODE = OFF [ OUTPUT ] DEGREE = 0.0

3 3. When the user needs a higher voltage AC Source, it can be set under 3- PHASE MODE operation under OUTPUT functional list. The AC Source that s set as MASTER sends a SYNchronized signal to the SLAVE to synchronize the phase angle. The SLAVE also uses the signal to trigger and shut down the output. To synchronize the signal, we have to use a special cable with one terminal of the cable connected to SYN (rear panel, BNC connector) which will become the MASTER. The other signal that has to connect is: /Remote-Inhibit of TTL signal (rear panels, 9-Pin D-Type connector, see Appendix A) which will be the SLAVE. Procedure: 1. The procedure of using THREE PHASE MODE for series connection: a. Connect the L terminal of Master to the N of Slave AC source outputs. b. Connect the cable for synchronism. c. Power on both AC sources. Keep all in output quit state. d. Set the 3-PHASE MODE = MATER, DEGREE = 0. And set another AC source 3-PHASE MODE = SLAVE, DEGREE = 0. Press PAGE/EXIT twice to MAIN PAGE. Set the voltage and frequency on each AC source. It is necessary for all AC sources set the same frequency. e. Press OUT/QUIT at MASTER to start output. Press OUT/QUIT again to quit the output. The OUT/QUIT key of SLAVE is no use when 3-phase mode. 2. To change THREE PHASE MODE from OFF to SLAVE as below: a. Move the cursor to the command line of 3-PHASE MODE=. 3-PHASE MODE = OFF_ b. Turn RPG to change the option from OFF to SLAVE, then press ENTER. 3-PHASE MODE = SLAVE c. The cursor move to the command line of DEGREE = automatically. DEGREE = 0.0_ d. Press 0, then press ENTER. DEGREE = 0.0

4 *** NOTICE *** The voltage setting of series output is line-to-neutral VLN for each phase. The real output voltage is V_master + V_slave. Only one AC source can be set to MASTER, or it may cause damage when run 3-PHASE MODE. 3. For safety concern, the 3-phase mode can t save to power-on status. Cable Connecting for Series Output Master (Unit 1) Slave (Unit 2) N L Output Voutupt = V_master + V_slave

5 The Rear Panel Figure 1-2 The Rear Panel Table 1-2 The Description of the Rear Panel Item Name Description 1 Label The label includes model number, series number of the AC source. 2 Ext. Ref. The BNC connector inputs control waveform amplitude from external analog signal. 3 RS-232C The 9-pin, D-type female connector transfers control commands to and from the remote PC for remote operation. 4 GPIB Connector A remote controller using GPIB bus is connected to the AC source through this connector for remote operation. 5 TTL SIGNAL The 9-pin, female connector transfers control signals (fault_out, remote inhibit, and AC_ON). 6 SCLK,PWM, SYNC The BNC connectors SCLK and PWM are for AC source parallel connectivity only. SYNC transfers a pulse signal synchronously when output changes. 7 Output Connector This connector outputs power to the loading device.

6 8 Remote Sense Connector 9 Power Line in Connector It senses directly at the terminals of the load to eliminate any voltage drop on the connecting cable. Make sure of connecting the terminal SL of the remote sense connector to the terminal L of the load, and the SN to the N of the load. Reverse polarity is not allowed. Power line input is connected to the AC source through this connector. 9-Pin D-Type Male Connector : Pin No. Signal Pin No. Signal 1 GND 6 GND 2 / Remote-Inhibit 7 GND 3 GND 8 / FAULT-OUT 4 AC-ON / Remote-Inhibit : When voltage level of this pin becomes LOW, it can inhibit the output of AC source ( See ). AC-ON : When AC source output voltage, this pin will become HIGH, and it becomes LOW when quit output. / FAULT-OUT : The voltage level of this pin is HIGH if AC source is in normal state. It becomes LOW when AC source is in protection state.

PROGRAMMABLE AC SOURCE 61501/61502/61503/61504 User s Manual

PROGRAMMABLE AC SOURCE 61501/61502/61503/61504 User s Manual Version 1.1 February 2004 P/N A11 000568 Legal Notices The information in this document is subject to change without notice. Chroma ATE INC.