CSA American ATO-705-N User Manual download pdf (Page 11)

Voltage and Frequency Sensing

• 3-Phase under and over voltage settings on normal

and emergency sources.

• Under and over frequency settings on normal and

emergency.

• True RMS Voltage Sensing with +/- 1% accuracy;

Frequency Sensing Accuracy is +/- 0.2%.

• Selectable settings: single or three phase voltage

sensing on normal and emergency; 50 or 60Hz.

• Phase sequence sensing for phase sensitive loads.

• Voltage unbalance detection between phases.

Status and Control Features

• Output contact (N/O or N/C) for engine-start signals.

• Selection between “commit/no-commit” on transfer

to emergency after engine start and normal restores

before transfer.

• Advanced inphase algorithm which automatically

measures the frequency difference between the two sources

and initiates transfer at appropriate phase angles to mini-

mize disturbances when transferring motor loads.

• Event log displays 99 logged events with the time and

date of the event, event type and event reason.

• Output signals for remote indication of normal and emer-

gency source acceptability

• Statistical ATS/System monitoring data screens which provide:

• Total number of ATS transfers.

• Number of ATS transfers caused by power source failure.

• Total number of days ATS has been in operation.

• Total number of hours that the normal and emergency

sources have been available.

Time Delays

• Engine start time delay - delays engine starting signal to

override momentary normal source outages - adjustable

0 to 6 seconds.

• Transfer to emergency time delay - adjustable 0 to 60

minutes.

• Emergency source stabilization time delay to ignore

momentary transients during initial generator set

loading - adjustable 0 to 6 seconds.

• Retransfer to normal time delay with two settings:

• Power failure mode - 0 to 60 minutes.

• Test mode - 0 to 10 hours.

• Unloaded running time delay for engine cooldown -

adjustable 0 to 60 minutes.

• Pre and post transfer signal time delay for selective

load disconnect with a programmable bypass on source

failures - adjustable 0 to 5 minutes. This signal can be

used to drive a customer furnished relay, or for (2) sets of

double throw contacts rated 3 amps at 480 volts AC, spec-

ify ASCO optional accessory 31Z.

• Fully programmable engine exerciser with seven

independent routines to exercise the engine generator,

with or without loads, on a daily, weekly, bi-weekly or

monthly basis.

• Contains all alarm signals, logic and time delays for

use with closed transition switches.

• In synch time delay - 0 to 3 seconds.

• Failure to synchronize - 1 to 5 minutes.

• Extended parallel - 0.1 to 1.0 seconds.

• Delayed transition load disconnect time delay -

adjustable 0 to 5 minutes.

7000 series Microprocessor Controller

Features

• Digital microprocessor.

•

Touch pad programming of features and settings

without the need for meters, or variable power supplies.

• Sixteen (16) selectable operating voltages available in a

single Controller.

• On-board diagnostics provide control panel and ATS sta-

tus information to analyze system performance.

• Displays and counts down active timing functions.

• Selectable multi-language display

(English, German, Portuguese, Spanish, or French. For

others contact ASCO).

• Password protection to prevent unauthorized tampering

of settings.

• Remote monitoring and control with ASCO

POWERQUEST

communications

products. Specify optional accessory 72E.

• Load shed option for bus optimization applications.

Specify optional accessory 30B.

• Historical event log

• Statistical ATS systems monitoring information

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CSA American ATO-705-N User Manual Page 11

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