ASCO Group G Controller for SERIES 300 Transfer Switches

Data Sheet

The Group G Controller offers enhanced capabilities for dependable operation across a wide range of applications.

Control and Display Panel

The ASCO Group G Controller features an intuitive, easy-to-navigate 128 x 64 graphical LCD display with a keypad. This panel provides LED indicators for switch position, source availability, not-in-auto mode, and alert conditions. It also includes soft keys for test and time delay bypass functions.

Image Description: A graphical representation of the ASCO Group G Controller's front panel. It displays 'Normal OK' and 'Load on Normal' status, with a prominent 'Press Test Transfer' button. Below the screen are various control buttons and indicators, including power symbols, directional arrows, and a QR code.

Features

Intuitive, easy-to-navigate 128 x 64 graphical LCD display with a soft keypad and six LED indicators.
Switch Position: Indicated by ? (green) for normal and ? (red) for emergency LED.
Source Availability: Indicated by ? (green) for normal and ? (red) for emergency LED.
"Not In Auto" Status: Indicated by an ? (amber) LED.
Common Alarm: Indicated by an ? (amber) LED.
The integrated display is self-contained, requiring no additional components for effective operation.
Supports both open and delayed transition configurations for automatic and non-automatic systems.
Features an integrated, multilingual user interface for flexible configuration and monitoring.
Provides multiple source-sensing capabilities for voltage and under frequency.
An optional current card is available for current sensing without an external metering device.

Standard Selectable Features

Inphase Monitor: Transfers motor loads without intentional off-time to prevent inrush currents from exceeding normal starting levels.
Engine Exerciser: Automatically tests the backup generator weekly, with or without load for 20 minutes (non-adjustable). An advanced multi-schedule exerciser is available as part of the optional 11BE bundle.
Commit to Transfer: Ensures a stable transfer.
Selective Load Disconnect Circuit: Provides pre-transfer and/or post-transfer signals when transferring between emergency and normal sources.
Re-transfer to Normal: Achieved through soft keys, allowing selection of "manual" or "automatic" operation.
Frequency and Phase Selectable: Switchable between 60Hz or 50Hz, and three-phase or single-phase operation.

Voltage, Frequency, and Current Sensing Features

3-phase sensing on the Normal source and single-phase sensing on the Emergency Source (3-phase Emergency sensing is optional).
Under and over voltage and frequency settings are configurable for both normal and emergency sources.
True RMS voltage sensing with +/-1% accuracy.
Frequency sensing accuracy is +/- 0.1Hz.
Voltage and frequency parameters are adjustable in 1% increments.
Settings include: single or three-phase voltage sensing on normal, single-phase voltage sensing on emergency, and 50 or 60Hz selection. 3-phase voltage unbalance sensing is available on normal (Emergency unbalance is optional).
Load current sensing card is available as an option.

Remote Control Features

External inputs for connecting remote control devices.
Remote test switch capability.
Remote contact for test or peak shaving applications; the switch will automatically transfer back to the normal source if it fails and is acceptable.
Inhibit transfer to emergency function.
Remote time delay bypass switch for emergency to normal transitions.

Time Delays

Engine Start Time Delay: Delays the engine starting signal to override momentary normal source outages, adjustable from 0 to 6 seconds (Feature 1C).
Emergency Source Stabilization Time Delay: Ignores momentary transients during initial generator set loading, adjustable from 0 to 4 seconds (Feature 1F).
Re-transfer to Normal Time Delay: Available with two settings (Feature 3A).
Power Failure Mode: Adjustable from 0 to 60 minutes.
Test Mode: Adjustable from 0 to 10 hours.
Unloaded Running Time Delay: For engine cooldown, adjustable from 0 to 60 minutes (Feature 2E).
Pre- and Post-Signal Time Delay: For selective load disconnect with programmable bypass on source failures, adjustable from 0 to 5 minutes (specify ASCO optional Accessory 31BG).
Delayed Transition Load Disconnect Time Delay: Adjustable from 0 to 5 minutes (3ADTS/3NDTS configuration only).

Door-Mounted Control & Display Panel Details

The physical control panel includes the following elements:

1 Common Alarm: Indicated by an ? (amber) LED.
2 Not In Auto Indicator: Indicated by an ? (amber) LED.
3 Scroll, Up/Down Arrows: Used for navigation (⬆️⬇️).
4 Escape Key: To exit menus or operations (?).
5 Enter Key: To confirm selections or enter data (✅).
6 LED Source Availability and Switch Position Indicators: Display status using ? (green) and ? (red) LEDs.
Transfer / Time Delay Override control push-button.

Status Overview

Control Status	Source Status (Normal / Emergency)	Alarm Status	Controller Information
Normal OK Load on Normal `Press Test Transfer`	Normal: V: 207V F: 60.0Hz Emergency: V: 207V F: 60.0Hz	No Active Alarms	Serial Number: 000000000000 Software Version: 894063x581 12/05/14 Thu 12/11/14 15:08:54
Normal OK Normal Emergency Timer: 00 Min 02 Sec `Press Bypass Timer`	Normal Load: V: 207V, 200A Emergency Load: V: 204V, 198A V: 205V, 200A F: 60.0Hz	Alarm 1 of 1 Transfer Failure `Press To Acknowledge Alarms`

Settings Menu

The controller provides access to various settings through a menu structure:

Main Menu / Settings

Enter Password: ****

Settings / Engine Exerciser

Engine Exerciser
Present Time: 09:08:16
Program No
Enable
With Load

Settings/General/ Communications

RS485 Port
Baud Rate: 9600
Device Addr: 1
Protocol: AscoBusII
Emulate Grp1

Settings/General/ Common Alarms

Common Alarms
Loss E when on E
E Accept Fail

Main Menu / Event Logging

<< Event Log >>
Event 1 of 248
Engine Stop
05/07/13 10:23:44.0

Main Menu / Statistics

Statistics
TS Total Transfers: 82
ITS Transfer Time: 5.0 Sec

Main Menu / Factory/Diagnostics

<< Discrete Inputs >>
CNN 1 F5 1 F30 1
CNE 0 F17 1 TST 1
CEN 0 F34 1
CEE 0 F6 1

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