Starter Dry Run
RTHC-SVD01B-EN 43
Section 7 Starter Dry Run
7-1. General
RTHC units can have Y-Delta or Solid State Starters. This section cov-
ers Y-Delta Starters.
7-2. Timing Requirements
Timing requirements to operate the “Stop”, “Start”, “Short”, “Transition”,
and “Run” contact closure outputs are shown below. Prior to closing
the “Short” contact, the transition complete input shall be verified to be
open, otherwise an MMR diagnostic shall be generated.
Table 7-1: Timing Requirements
Interval Min. Max Units Actual Design
A Test for transition complete input open msec 160 to 240
B Time delay msec 20
C Close 1K1 Contactor and test for no
current. Level 2 Contactor integrity
test
msec 500
Dsec1
E Open 1K1 msec 200
F Close shorting Contactor 1K3 and test
for no current, then wait for start
command. Starter integrity test.
100 msec 1
G Close 1K1 2.0 sec 2
H Wait 1.5 sec after phase current drops
to 85%
12sec 1.5
J Begin transition sequence 85 100 msec 100
K Open 1K3 250 300 msec 260
L Close 1K2 msec 140
M Wait to look for transition complete. msec 2.32 to 2.38
N Filtering time on transition complete
input.
msec 160 to 240
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