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Operation and Features (cont’d)
Zenith Module 9 Accessory Package
The Zenith Module 9 Accessory package includes nine of the commonly specified accessories.
These accessories are:
A Auxiliary Contacts:
A3 Closed when switch is in emergency position
Indicating LED Pilot Lights:
L1 Indicates switch in emergency position
L2 Indicates switch in normal position
P1 Time Delay - Engine Start: Adjustable 0.5 to 6 seconds
T200 Time Delay on Retransfer to Normal: To delay retransfer to normal source (immediate
retransfer on generator set failure); standard setting 30 minutes, adjustable 0-60 minutes.
T100 Time Delay on Retransfer to Normal: To delay retransfer to normal source (immedi
-
ate retransfer on generator set failure); standard setting 30 min., adjustable 0-30 min.
T3/W3Time Delays - Presignal for Auxiliary Control: Prior to transfer between two live
sources in either direction, provides an adjustable (factory set at 20 second) presig-
nal contact closure
U200 Time Delay for Engine Cooldown: Allows engine to run unloaded after switch
retransfers to normal. Standard setting 5 min., adjustable 0-60 minutes.
U100
Time Delay for Engine Cooldown: Allows engine to run unloaded after switch
retransfer to normal; standard setting 5 min., adjustable 0-5 min.
W200 Time Delay on Transfer to Emergency: To delay transfer to emergency after nor-
mal source failure; standard setting 1 sec., adjustable 0-5 minutes.
W100
Time Delay on Transfer to Emergency: To delay transfer to emergency after verifying
emergency source available; standard setting 1 sec., adjustable 0-15 sec.
Zenith Controls, Inc.
ZTSH Operation and Maintenance Manual (43R-1000)
9
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