ASCO Series 300 Automatic Transfer Switch Wiring Diagrams and Specifications
This document provides detailed wiring diagrams, control features, wire run listings, and physical diagrams for the ASCO Series 300 Automatic Transfer Switch (ATS).
Product Overview
The ASCO Series 300 Automatic Transfer Switch is designed for single-phase applications, rated for 1000, 2000, 2600, and 3000 Amperes. This document specifically details the wiring for models equipped with Group 1 Controls.
Control Features
Key control features include:
- Single Phase Wiring
- Series 300 Automatic Transfer Switch
- Ratings: 1000, 2000, 2600, 3000 Amperes
- Group 1 Controls
- Optional Neutral Types: Refer to "Explanation of Catalog Number Codes" in the catalog number chart on Sheet 1.
- Switching configurations
- Overlapping contacts
- Solid bus plate
Wiring Diagrams
Main Power Poles
The main power poles diagram illustrates the connections for the transfer switch, differentiating between Normal and Emergency power sources and the load.
- Emergency Power: Connections labeled EL1, EL2, ELO.
- Load: Connections labeled LL1, LL2, LLO.
- Normal Power: Connections labeled NL1, NL2, NLO.
TS Operator Circuit
This section details the operator circuit for the transfer switch (TS). It includes components such as:
- Solenoid Assembly
- CR1 and CR2 relays
- JBLK (Jumper Block)
- Various terminal connections (e.g., P, P1, P2, J3, TS(AUX1), TS(MUS))
- Control Panel (CP) connections
- Indicator lights (e.g., RED, GREEN)
- Internal wiring paths and connections for the transfer switch operation.
The diagram shows the sequence of operation for the solenoid, indicating positions like "AFTER SOLENOID PASSES THROUGH TOP DEAD CENTER POSITION."
Control Signals & Indication
This section outlines the wiring for control signals and indicators:
- Normal Source Circuits: Depicts sensing for the Normal Source (e.g., ØL1, L2) connected to the Control Panel (CP).
- Emergency Source Circuits: Depicts sensing for the Emergency Source (e.g., ØL1, L2) connected to the Control Panel (CP).
- Load Terminal Circuits: Shows connections for the Load (e.g., LL1, LL2, LLO).
- Accessory 11BG: Wiring for the "PROGRAMMABLE ENGINE EXERCISER & SOURCE AVAILABILITY SIGNAL (OPTIONAL)" connected to the Control Panel (CP) and the 11BG accessory.
- Pop Sensing: Indicates sensing points for the transfer switch status.
Wire Run Listing
The following tables detail the wire connections, harness locators, and specifications:
Main Harness (P, P1, P2, J3) to TS
| Wire No. | Harness Locator | CLR AWG |
|---|---|---|
| 1 | P-2.TS-1 | 16 |
| 2 | P-3.P1-14 | 16 |
| 3 | P-4,TS-3 | 16 |
| 4 | P-5,TS-5 | 16 |
| 5 | P-6.TS-7 | 16 |
| 4 | P-7,TS-5 | 16 |
| 6 | P-8,TS(AUX1)-24 | 16 |
| 6 | TS(AUX1)-24,J3-1 | 16 |
| 7 | P-9,TS(AUX1)-25 | 16 |
| 7 | TS(AUX1)-25,J3-2 | 16 |
| 8 | P-10,TS(AUX1)-21 | 16 |
| 9 | P-11.TS-2 | 16 |
| 10 | P-12,TS-1 | 16 |
| 11 | P-13,TS(AUX1)-22 | 16 |
| 12 | P-14,TS(AUX1)-23 | 16 |
| 13 | P-16,P1-16 | 16 |
| 14 | P-17,J3-3 | 16 |
| 15 | P-18,TS-6 | 16 |
| 16 | P-19,TS-9 | 16 |
| 17 | P-20,TS-10 | 16 |
| 18 | P-21,TS-11 | 16 |
| 19 | P-22,TS-4 | 16 |
| 20 | P-23,TS-8 | 16 |
| 21 | P-24,TS-12 | 16 |
| 22 | P1-5,TS(MUS)-17 | 16 |
| 22 | TS(MUS)-17,TS(MUS)-15 | 16 |
| 23 | P1-6,TS(MUS)-19 | 16 |
| 23 | TS(MUS)-19,TS (MUS)-13 | 16 |
| 24 | P1-9,P2-4 | 16 |
| 25 | P1-10,P2-1 | 16 |
| 26 | P1-11,P2-2 | 16 |
| 27 | P1-12,P2-3 | 16 |
| 28 | P1-13,TS(MUS)-16 | 16 |
| 28 | TS(MUS)-16,TS (MUS)-14 | 16 |
| 29 | P1-15,TS(MUS)-20 | 16 |
| 29 | TS(MUS)-20,TS (MUS)-18 | 16 |
| 1 | P1-17.TS-1 | 16 |
| 4 | P1-18,TS-5 | 16 |
| 3 | P1-19,TS-3 | 16 |
| 5 | P1-20,TS-7 | 16 |
| 30 | P1-21,P1-23 | 16 |
Additional Wire Connections
| Wire No. | Harness Locator | CLR AWG |
|---|---|---|
| 31 | TS(AUX1)-27,TB-4 | 16 |
| 32 | TS (AUX1)-28,TB-5 | 16 |
| 33 | TS(AUX1)-29,TB-6 | 16 |
| 6 | TS(AUX1)-24,TB-1 | 16 |
| 7 | TS(AUX1)-25, TB-2 | 16 |
| 14 | P-17,TB-3 | 16 |
Harness 483763 (J, P1, P2) TS-CP Harness
| Wire No. | Harness Locator | CLR AWG |
|---|---|---|
| 1 | J-1,P1-8 | 16 |
| 2 | J-2,P1-15 | 16 |
| 3 | J-3,P1-2 | 16 |
| 4 | J-4,P1-4 | 16 |
| 5 | J-5,P1-17 | 16 |
| 6 | J-6,P1-12 | 16 |
| 7 | J-7,P1-7 | 16 |
| 8 | J-8,P2-2 | 16 |
| 9 | J-9,P2-3 | 16 |
| 10 | J-10,P2-8 | 16 |
| 11 | J-11,P1-10 | 16 |
| 12 | J-12,P1-1 | 16 |
| 13 | J-13,P2-9 | 16 |
| 14 | J-14.P2-10 | 16 |
| 15 | J-15,P1-5 | 16 |
| 16 | J-16.P1-13 | 16 |
| 17 | J-17,P2-1 | 16 |
| 18 | J-18,P1-14 | 16 |
Optional Accessories
Accessory 11BG (CKTS)
| Wire No. | Harness Locator | CLR AWG |
|---|---|---|
| 28 | CP-TB-4,11BG-TB-9 | 16 |
Optional Acc. 14AA & 14BA
| Wire No. | Harness Locator | CLR AWG |
|---|---|---|
| 39 | TS(AUX1)-30,TB-7 | 16 |
| 40 | TS(AUX1)-31,TB-8 | 16 |
| 41 | TS(AUX1)-32,TB-9 | 16 |
Physical Diagram and Enclosure Details
The physical diagram illustrates the layout of components within the enclosure.
- Enclosure: Contains the Transfer Switch (TS), Control Panel (CP), Solenoid Assembly, and various terminal blocks.
- Transfer Switch (TS): Shows main terminals EL1, EL2, ELO, LL1, LL2, LLO, NL1, NL2, NLO.
- Control Panel (CP): Includes connections for Normal and Emergency source sensing, Load terminals, and accessory connections.
- Operator Interface Membrane: Features indicator lights (DS1-DS5), push buttons (PB1-PB3), and connection points (CP-P1, CP-J1, CP-P2, CP-J2, CP-J4).
- Accessories: Details mounting and connections for Accessory 11BG (Engine Exerciser & Source Availability Signals) and Accessory 72A (Serial Communication Module).
- Field Connections: Points for connecting external signals and power.
- Internal Components: Includes MUS (Manual/Auto Switch), AUX1 (Auxiliary Contacts), ERR (Error indicator), SER (Service indicator), CR1, CR2 relays.
- Physical Features: Mentions door hinge, bonding strap, and flat cable connections.
Detail A (MUS, AUX1 Top View): Provides a closer look at the Manual/Auto Switch and Auxiliary Contacts.
Note: Connect P1 of PN 607761 to J3 of Operator Interface Membrane Assy. PN 473708 when Accessory 11BG is not used.
Note: ATS shown closed on Normal Source.
Revision History
The document includes a revision history tracking changes made via Engineering Change Notices (ECNs).
| REV. | TO ECN NO. | BY | DATE | DESCRIPTION |
|---|---|---|---|---|
| A | 159489 | BWM | 12/10/01 | ISSUE |
| B | 162198 | BWM | 11/15/02 | SEE ECN |
| C | 162323 | BWM | 12/9/02 | SEE ECN |
| D | 164762 | BWM | 9/03 | ADD 11BG |
| E | 167217 | SDH | 06/04/04 | SEE ECN |
| F | 167603 | BK | 07/22/04 | SEE ECN |
| G | 213532 | WK | 06/04/07 | SEE ECN |
