American Standard CH530 manual Control Sequence Operation, Test and start timing sequence

Control Sequence

of Operation

Figure 24. Test and start timing sequence

				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
Steps A to F: Starter Integrity Test				MMR diagnostic shall be generated.
Steps G to N: Starter Timing
Interval	Minimum	Maximum		Units	Actual Design
A. (Test for transition complete
input open)					160 to 240 milliseconds
B. (Just delay time)					20 milliseconds
C. (Close 1M (2K1) Contactor and test
for no current.) (Starter integrity test)					500 milliseconds
D. (Hold 1M (2K1) Contactor and test
for no current.) (Starter integrity test)					1 second
E. (Open 1M (2K1) Delay time					200 milliseconds
F. (Close Shorting Contactor (2K3) and
and test for no current, then wait for
Start command.) (Starter integrity test)	100		milliseconds		1 second (Minimum)
G. (Close 1M (2K1 and 2K11)	2.0			second	2 second
H. (Wait 1.5 seconds after phase currents
drop to 85 percent)	1	2		second	1.5 second
J. (Begin Transition sequence)	85	100	milliseconds		100 milliseconds
K. (Open S (Shorting) Contactor)	250	300	milliseconds		260 milliseconds
L. (Close 2M (2K2) Contactor					140 milliseconds
M. (Wait to look for Transition complete)			milliseconds		2.32 to 2.38 second
N. (Filtering time on Transition
complete input)			milliseconds		160 to 240 milliseconds

70 CDHF-SVU01C-EN