2.5 SCR INSTALLATION SPECIFICATIONS
2.5.1 SCR TIGHTENING PROCEDURE
2.5.1.1 Clean both heat sink and SCR surfaces.
2.5.1.2 Apply a thin layer of joint compound (Noalox) to both SCR surfaces.
2.5.1.3 Observe correct SCR polarity.
2.5.1.4 Install SCR so that roll pins engage dimples on both sides of the SCR.
2.5.1.5 Tighten clamp bolts evenly until finger-tight.
2.5.1.6 Tighten each bolt according to table below (based on number of spring bars and
size of bars).
* Note : SMALL clamps are 4.25 inches / 10.5 cm and LARGE clamps are 5 inches /
12.5 cm.
CLAMP SIZE
SPRING BARS
BOLT TURNS PAST
FINGER TIGHT
SMALL
1
0.8
SMALL
2
1
LARGE
3
1.8
LARGE
4
1.8
PAGE 7
Summary of Contents for Cutler-Hammer TRU-START
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Page 21: ...5 TYPICAL CONNECTIONS 5 1 STAND ALONE DC INJECTION UNIT WITH ZERO SPEED DISABLE PAGE 17 ...
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Page 23: ...5 3 REVERSING TRU START STARTER WITH DC INJECTION 125 AMPS AND BELOW PAGE 19 ...
Page 24: ...5 4 REVERSING TRU START STARTER WITH DC INJECTION 200 AMPS AND ABOVE PAGE 20 ...
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