Emerson manual Asco 7000 Series Optional Accessories

	ASCO 7000 Series Optional Accessories
Time Delays	Neutral Conductor Options

2C The standard feature one time delay is adjustable from 0 to six seconds to delay engine starting. If necessary, extended time delay on engine starting is available. Adjustable from 0 to 60 min in one second steps. Factory set at five minutes.

1G Similar to accessory 2C except using 24 volt DC external input signal.

•Solid neutral, with fully-rated terminals. (AL-CU) UL Listed.

•Conventional neutral switching pole.

•Overlapping neutral transfer contacts. Allows for proper ground-fault sensing and avoids generator voltage transients during transfer.

Note: Specify neutral option in catalog number, see page 21 for instructions.

Manual Controls for Automatic Transfer Switches

6C Reset switch for manual retransfer to normal with automatic retransfer in the event of emergency source failure.

6D Selector switch for automatic/manual retransfer to normal. Automatic bypass if emergency fails.

Engine Generator Controls and Accessories

12Three position engine control selector switch.

Positions: 1- Stop 2 - Automatic 3 - Engine Test

Note: Switches with accessory 12 must be labelled as a non-automatic transfer switch according to UL 1008.

Engine controls containing “engine stop” positions should be located at the engine generator. (Consult ASCO for application assistance.)

Indicators

14A/14B Additional auxiliary contact sets to indicate switch position. Two sets are standard. Specify total number of sets if more are required.

18B Two-pole, double-throw contacts operate when emergency source voltage is present at transfer switch terminals.

18G Two-pole, double-throw contacts operate when normal source voltage is present at transfer switch terminals.

99“Push-to-Test” feature on all pilot light indicators.

Extension Harness

37B Six foot (6’) extension harness to increase distance between transfer switch and control panel on open-type units.

Analog Load Metering Options

23B Three phase ammeter with selector switch (with current transformers and shorting blocks).

24B Three phase voltmeter with selector switch.

Note: Refer to ASCO 7000 Series Data Monitor on page 15 which provides voltage, frequency and power monitoring.

Serial Communications

72A Serial communication module for remote communications to ASCO PowerQuest® products.

Surge Protection

ASCO Pulsar 450 rated 40KA

73AC1 Normal source protection. (3Ø, 4wire WYE) 73AC2 Emergency source protection. (3Ø, 4wire WYE) 73AC3 Load side protection. (3Ø, 4wire WYE)

Note: Other distribution voltages available (Contact ASCO).

Special Applications

111A Generator - to - Generator for Standby Applications

111B Generator - to - Generator for Prime Power Applications

Customer Control Circuits

30A Load-shedding circuit initiated by opening of a customer-supplied contact.

30B Load-shedding circuit initiated by removal of customer-supplied control voltage. (Specify voltage).

31Z Selective load disconnect control contacts (two provided) which operate with time delay prior to and/or after load transfer and retransfer.

43R Terminal block for all customer control connections on 30-150 amp only (standard on all other sizes).

Bypass Isolation Switch Options

14A1 Auy contact to close in “Bypass to Normal” position. 14B1 Auxiliary contact to close in “Bypass to Emergency” position.

14T Auxiliary contact to close when transfer switch is in “Automatic” position.

14U Auxiliary contact to close when transfer switch is in “Isolate” position.

14V Auxiliary; contact to close when transfer switch is in “Test” position.

Note: An externally operable quick-make, quick-break (QMQB), manual handle is available on some 7000 Series product configurations.

Page 14 (Consult ASCO for guidance.)