Enerpro Document No: OP-0106, Rev. B
Page 5 of 14
ECO #19-11089; Release Date: 08/02/2019
Figure 2
Gate Pulse Profile (into 1Ω)
2
.
Figure 3
Initial pulse profile detail (into 1Ω)
12.0
Installation and Checkout
The following procedure should be followed to ensure proper operation prior to the application of
mains power to the SCRs. The following equipment will be required:
Oscilloscope (100 MHz two-channel model or better)
Digital multimeter
DC supply or potentiometer for SIG HI input
Mate-N-Lok™ crimp tool (AMP Service Tool II #29004-1 or equivalent)
Mate-N-Lok™ extraction tool (AMP Extraction Tool 458994-2 or equivalent)
Wire strippers
12.1.
Ensure that the mains are not energized.
Wire plug P3 with the mains voltage connected
to the appropriate pins. With an EP1031 power control transformer installed, connect between
pins 5 and 3 for 120 V mains or pins 5 and 1 for 240 V mains. With an EP1032 power control
transformer, connect between pins 5 and 3 for 240 V mains or pins 5 and 1 for 480 V mains. Note
that the control power source must be in phase with the AC mains connected to the SCRs.
12.2. Install plug P4, prewired with the delay angle command signal, signal common, and
instant/soft inhibit controls.
12.3. Make the appropriate selection at J8 for 50 or 60 Hz mains.
2
Current waveforms obtained using a Pearson model 2877 current transformer (1.0 A/V) with 4 primary turns. The current
transformer is terminated by the scope’s 1.0 MΩ input impedance.
