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Time Delay |
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2C An extended time delay on engine starting. Adjustable from 0 to 60 min in 1 second steps. Factory set at 5 minutes. |
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Manual Controls for Automatic Transfer Switches |
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6C Reset switch for manual retransfer to normal with automatic retransfer in the event of emergency source failure. |
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6D Selector switch for automatic/manual retransfer to normal. Automatic bypass if emergency fails. |
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Engine Generator Controls and Accessories |
12
Three position engine control selector switch.
Positions: 1 - Stop 2 - Automatic 3 - Engine |
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Note: Engine controls containing engine stop positions should be located at the engine generator. (Consult ASCO for application assistance). |
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| Indicators |
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14A/14B Additional auxiliary contact sets to indicate switch position. Two sets are standard. Specify total number of sets if more are required. |
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18B Two-pole, double-throw contacts operate when emergency source voltage is present at transfer switch terminals. |
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18G
Two-pole, double-throw contacts operate when normal
source voltage is present at transfer switch
terminals |
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99 Push-to-Test
feature on all pilot light indicators |
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Customer Control Circuits |
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30A Load-shedding circuit initiated by opening of a customer-supplied contact. |
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30B Load-shedding circuit initiated by removal of customer-supplied control voltage. (Specify voltage). |
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31Z Selective load disconnect control contacts (two provided) which operate with time delay prior to and/or after load transfer and retransfer. |
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43R
Terminal block for all customer control connections
on 30-150 amp only (standard on all other sizes). |
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Neutral Conductor Options |
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Solid neutral, with fully-rated terminals. (AL-CU) UL Listed. |
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Conventional neutral switching pole. |
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Overlapping neutral transfer contacts. Allows for proper ground-fault sensing and avoids generator voltage transients during transfer. |
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Specify
neutral option in catalog number, see page 16 for
instructions |
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Extension Harness |
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37B
Six foot (6') extension harness to increase distance
between transfer switch and control panel on
open-type units |
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Analog Load Metering Options |
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23B Three phase ammeter with selector switch (with current transformers and shorting blocks). |
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24B
Three phase voltmeter with selector switch |
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Notes: Refer to ASCO 7000 Series Data Monitor which provides voltage, frequency and power monitoring. |
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Serial Communications |
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72A
Serial communication module for remote
communications to ASCO Power Quest products |
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Surge Protection - ASCO Pulsar 450 rated 40KA |
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73AC1 Normal source protection. (3Ø, 4wire WYE) |
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Emergency source protection. (3Ø, 4wire WYE)73AC2 |
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Load side protection. (3Ø, 4wire WYE)73AC3 |
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Other distribution voltages available (Contact ASCO). Notes: |
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Bypass Isolation Switch Options |
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14A1 Auxiliary contact to close in Bypass to Normal position. |
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14B1 Auxiliary contact to close in Bypass to Emergency position. |
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14T Auxiliary contact to close when transfer switch is in Automatic position. |
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14U Auxiliary contact to close when transfer switch is in Isolate position. |
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14V Auxiliary; contact to close when transfer switch is in Test position. |
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ATS Bypass Isolation Drawout Features (1000-2000 amperes) |
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82B Transfer switch lifting yoke to facilitate the removal of the transfer switch from the drawout carriage. |
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82C Automatic shutters to provide isolation of bus stabs. |
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Notes: An externally operable quick-make, quick-break (QMQB), manual handle is available on some 7000 Series product configurations. (Consult ASCO for guidance). |