TWRF1 SCR Power Controller
Troubleshooting
Rev 2
Ametek HDR Power Systems
21
5.6
Correcting Troubles in the TWRF1 Itself
Table 5.1 provides a comprehensive guide for troubleshooting the TWRF1.
Table 5.1 Troubleshooting Chart (Symptoms and Solutions)
Cause
Solution
No output even with manual control (Zero) turned full CW.
(1a) Open SCR fuse
Disconnect power 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 TWRF1. 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
Disconnect power 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 6.2 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
Содержание TWRF1 SCR Series
Страница 6: ...Table of Contents TWRF1 SCR Power Controller iv Ametek HDR Power Systems Rev 2...
Страница 8: ...Safety Instructions TWRF1 SCR Power Controller 2 Ametek HDR Power Systems Rev 2...
Страница 12: ...Description TWRF1 SCR Power Controller 6 Ametek HDR Power Systems Rev 2...
Страница 16: ...Operation TWRF1 SCR Power Controller 10 Ametek HDR Power Systems Rev 2...
Страница 22: ...Operation TWRF1 SCR Power Controller 16 Ametek HDR Power Systems Rev 2...
Страница 33: ...TWRF1 SCR Power Controller Appendix Rev 2 Ametek HDR Power Systems 27 Appendix B 30 60 A Outline R...
Страница 34: ...Warranty TWRF1 SCR Power Controller 28 Ametek HDR Power Systems Rev 2 Appendix C 90 225 A Outline R...
Страница 35: ...Notes...
Страница 36: ...530 Lakeview Plaza Blvd Ste C Worthington Ohio 43085 USA...
