ASCO Series 300 Automatic Transfer Switches
Single Phase Wiring for 30, 70, 104, 150, 200, & 230 Amperes with Group 1 Controls
Control Features
- Single Phase Wiring for ASCO Series 300 Automatic Transfer Switches
- Rated 30, 70, 104, 150, 200, & 230 Amperes
- Group 1 Controls
Main Power Poles
The main power poles illustrate the electrical connections for the transfer switch. They show the configuration for both EMERGENCY and NORMAL power sources.
- EMERGENCY Source: Connected via terminals EL1, ELO, EL2, NLO.
- NORMAL Source: Connected via terminals LL1, LLO, LL2, NL1.
- LOAD: Connected to LL1, LL2, LLO.
- Optional Neutrals: The document mentions "OPTIONAL SWITCHING NEUTRAL" and "OPTIONAL OVERLAPPING NEUTRAL". These options affect the neutral connection configuration, with details available in the "EXPLANATION OF CATALOG NUMBER CODES". Options include "NONE", "SOLID BUS PLATE", "SWITCHING (LOCATED BETWEEN L1 & L2 POLES)", and "OVERLAPPING CONTACTS".
Note: The diagram typically shows the ATS closed on the NORMAL source.
TS Operator Circuit
This section details the control circuit for the transfer switch operator. It shows various terminal connections (e.g., TS-8, TS-6, TS-7, TS-3, TS-4, TS-5, TS-20, TS-21, TS-22, TS-17, TS-2, TS-1, TS-16, TS-18, TS-70, TS-72) and their interconnections, including control contacts and solenoid position indications.
Transfer Switch Test & Adjustment Procedure: Specifies control cut-off (contact opening) setting.
Source and Load Circuits
This section visually represents the flow of power from the sources to the load.
- NORMAL SOURCE CIRCUITS: Depicts connections for the normal power source, labeled with terminals like KEL1, KLL1, KLL2, KELO.
- EMERGENCY SOURCE CIRCUITS: Depicts connections for the emergency power source, labeled with terminals like KEL1, KLL1, KLL2, KELO.
- LOAD TERMINAL CIRCUITS: Shows the connection points for the load, labeled LL1, LL2, LLO.
Wire Run Listing
This table provides a detailed list of wire connections for the transfer switch, specifying the source and destination terminals for each wire number.
| Wire No. | Connection (Source) | Connection (Destination) | CLR AWG |
|---|---|---|---|
| 1 | TS-8,P1-8 | 16 | |
| 2 | TS-A,P1-15 | ||
| 3 | TS-6,P1-2 | ||
| 4 | TS-3,P1-4 | ||
| 5 | TS-B,P1-17 | ||
| 6 | TS-5,P1-12 | ||
| 7 | TS-4,P1-7 | ||
| 8 | TB-14,P2-2 | ||
| 9 | TB-15,P2-3 | ||
| 10 | TS-17,P2-8 | ||
| 11 | TS-2,P1-10 | ||
| 12 | TS-1,P1-1 | ||
| 13 | TS-16,P2-9 | ||
| 14 | TS-18,P2-10 | ||
| 15 | TS-70,P1-5 | ||
| 16 | TS-72,P1-13 | ||
| 17 | TS-4,TS-9 | ||
| 18 | TS-7,TS-1 | ||
| 19 | TS-3,TS-69 | ||
| 20 | TS-5,TS-71 | ||
| 21 | TS-14,TB-14 | ADD WIRES | |
| 22 | TS-15,TB-15 | ADD WIRES | |
| 23 | TB-16,P2-1 | DEAD END WIRES |
Optional Accessory 11BG: Includes connections for accessory 11BG and programmable engine exerciser.
Control Signals & Indication
This section describes signals related to control panels and accessories.
- ACCESSORY 11BG: Programmable Engine Exerciser & Source Availability Signal. Connects to Control Panel (CP) via TB-4 and TB-9.
- TS AUX. CONTACTS: Provides status feedback from the transfer switch.
- TS POSITION SENSING: Indicates the current position of the transfer switch.
Physical Diagram: Enclosure and Components
This section provides a physical overview of the transfer switch and its internal components.
Enclosure View (Inside Front)
Shows the transfer switch (TS) with terminals for LOAD (LLI, LLO, LL2) and sources (EMERGENCY: EL1, ELO, EL2, NLO; NORMAL: NL1, NLO). It also details connections for optional switching and overlapping neutrals.
Operator Interface
Describes the operator interface membrane panel and its associated controls:
- DS1: TS Connected to Normal [Indicator]
- DS2: TS Connected to Emergency [Indicator]
- DS3: Normal Source Available [Indicator]
- DS4: Emergency Source Available [Indicator]
- DS5: Engine Exerciser [Indicator]
- PB1: Bypass Time Delay [Push Button]
- PB2: Transfer Switch Test [Push Button]
- PB3: Set Engine Exerciser [Push Button] (Optional Accessory 44G or 44A)
The Operator Interface Membrane Assembly (PN 473708) is shown, with the Accessory 11BG Assembly (PN 629830) mounting behind it.
Group 1 Control Panel
Details the Group 1 Control Panel with connections for P1, J1, P2, J2, CP-J4, CP-P4, and the ACC. 72A SERIAL COMMUNICATION MODULE.
Optional ASCO Serial Communication Device: Information on connecting a serial communication device (PN 607761).
Field Connections: Source Availability Signals.
Factory Connections: Refer to Sheet 1.
Technical Notes and Revision History
Manufacturing Tolerances: In accordance with ASCO Procedure MP-1-003.
Plastic Parts: Refer to MP-1-055.
Drawing Information:
- Project Name: WIRING
- Series: D300 ATS 1PH 30-230 AMPS
- Frame: "D" FRAME, GROUP 1 CONTROLS
- Drawing Number: HECN 213405 SHOF 4 (or similar variations across pages)
- Revision History: Includes dates and ECN numbers (e.g., 160946 BWM SDH 6/02, 163086 BWM WK 03/05/03, etc.).
Company Information: ASCO POWER TECHNOLOGIES, LP., Florham Park, New Jersey 07932 U.S.A.
Property: Property of ASCO Power Technologies. Use permitted for work only. All rights of design or invention are reserved.
