Ametek SHPF3 Series, Инструкция по эксплуатации и техническому обслуживанию

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SHPF3 SCR Power Controller Troubleshooting
Rev 2 Ametek HDR Power Systems 23
7.6 Correcting Troubles in the SHPF3 Itself
Table 7.1 provides a comprehensive guide for troubleshooting the SHPF3.
Table 7.1 Troubleshooting Chart (Symptoms and Solutions)
Cause Solution
No output even with manual control (Zero) turned full CW.
(1a) Open SCR fuse Remove and check the fuse. If it has opened, replace it after completing (b)
(1b) SCRs not firing Install a good fuse in the circuit, and apply power to the SHPF3. If the output is
fully controllable using the manual control, then resume normal operation. If the
power output is still zero, contact Ametek HDR Power Systems service.
Maximum power at all times regardless of control setting.
(2a) All SCR networks
shorted Remove the fuse and check the front-to-back SCR pairs by measuring
resistance between terminals L1 (of the SCR) and X1. On the Rx1 scale, the
resistance should be infinite in both directions. If a shorted component is
indicated in any of these cases, replace it.
(2b) Firing control
section defective Replace the fuse and return the power to the unit. If the problem persists,
contact Ametek HDR Power Systems service.
Output is variable but can’t be brought to zero with ZERO control
(3a) SCR network
shorted Check SCR network per solution 2a.
(3b) Firing control
section defective Contact Ametek HDR Power Systems service for assistance
Output is variable but can’t be brought to maximum with SPAN control
(4a) Firing control
section defective Contact service for assistance
Table 7.2 Torque Specifications
TORQUE, INCH POUNDS
INPUT/OUTPUT CONDUCTOR
SIZE, AWG OR CIR. MILS SLOT WIDTH* HEX HEAD
(ALL)
¼” OR LESS OVER ¼”
6-4 AWG 25 45 110
2 AWG 35 50 150
1 AWG 40 50 150
1/0 – 2/0 AWG 50 180
3/0 – 4/0 AWG -- 250
250 – 350 MCM -- 325
500 – 700 MCM -- 375
800 – 1000 MCM 500
* = Screwdriver Blade Width to Match
(With Socket-Head Screws, all Conductor Sizes)
SOCKET SIZE, ACROSS FLATS TORQUE INCH POUNDS
3/16” 120
1/4” 200
5/16” 275
3/8” 375
1/2" 500