Design 260-400 Amp Manual

ManualsBrandsWinco ManualsEquipmentASCO 300 E

381333–067 F

50 Hanover Road, Florham Park, New Jersey 07932–1591 USA

1 800 937–2726 (ASCO), for service call 1 800 800–2726 (ASCO) www.asco.com

ASCO POWER TECHNOLOGIES CANADA PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5T3

telephone 519 758–8450, fax 519 758–0876, for service call 1 888 234–2726 (ASCO) www.asco.ca

Operator’s

Manual

Seri es 300

Automatic Transfer Switches

E de si gn, 260 and 400 am p. si zes

DANGER is used in this manual to warn of high

voltages capable of causi n g shoc k , bur ns, or death.

WARNINGisusedinthismanualto

warn of possible personal injury.

CAUTIONisusedinthismanualtowarn

of possible equipment damage.

An experienced licensed electrician must install theATS.

260 & 400 amp sizes

Refer to the outline and wiring drawings provided with

your ASCO Series 300 ATS for all installation details.

A SCO Series 300 A utomatic Transfer Switches (ATSs) are

Listed under Underwriters Laboratories UL 1008 Standard

for Safety for Autom atic Transfer Switch es. ASCO Series

300s are also Listed under CSA C22.2 No. 178 Standard for

Automatic Transfer Switches. All control features are UL

Component Recog nized, which assures that A SCO automatic

transfer switch es meet OSHA Safety Requirem en ts and wil l

be acc ept able to electr ic al inspec tors .

ASCO Series 300 Automatic Transfer Switches are suitable

for emergency and standby system applications. They meet

emergency system rating requirements as defined in

National Electrical Code (NEC) Article 700 and UL 1008.

Also, they are suitable for the requirements of NEC Article

517 – Health Care Facilities, NEC Article 701 – Legally

Required Standby Syste ms, NEC Article 702 – Optional

Standby Systems, NFPA 99 Health Care Facilities, and

NFPA 110 Emergency and Standby Power Systems.

Rating Label

Eac h automatic trans fer sw itc h contains a rating l ab el to

define the loads and fault circuit withstand / closing ratings.

Refer to the label on the transfer switc h for specific values.

Do not exceed the values on the rating label.

Exceeding the rating can cause personal injury

or serious equipment damage.

TABLE OF CONTENTS

section

INSTALLATION 1..........................

SEQUENCE OF OPERATION 2.............

TESTING & SERVICE 3....................

ADJUSTMENTS 4.........................

CONTROL FEATURES 5...................

INDEX back cover.........................

Summary of content (19 pages)

PAGE 1
Operator’s Manual Series 300 Automatic Transfer Switches E design, 260 and 400 amp. sizes DANGER is used in this manual to warn of high voltages capable of causing shock, burns, or death. ! WARNING is used in this manual to warn of possible personal injury. ! CAUTION is used in this manual to warn of possible equipment damage. An experienced licensed electrician must install the ATS. Refer to the outline and wiring drawings provided with your ASCO Series 300 ATS for all installation details.
PAGE 2
Nameplate and Catalog Number Identification The Transfer Switch nameplate includes data for each specific ASCO Series 300 ATS. Use the ATS only within the limits shown on this nameplate. A typical Catalog Number is shown below with its elements explained. The example is for a Series 300 ATS with switched neutral, 3 pole, 400 amp.
PAGE 3
SECTION 1 INSTALLATION Series 300 Automatic Transfer Switches are factory wired and tested. Installation requires skid removal then securing the enclosure to the supporting foundation. Supporting Foundation The supporting foundation for the enclosure must be level and straight. Refer to the applicable enclosure outline drawing included with the Series 300 for all mounting details including door opening space. ! Be sure that the insulator piece is behind 260 and 400 ampere transfer switches.
PAGE 4
INSTALLATION (continued) Engine Starting Contacts Controller Ground The engine control contact connections are located on the transfer switch. Connect signal wires to appropriate term– inals as specified in Table A, shown in Figure 1–2. A grounding wire must be connected to the controller’s lower left mounting stud. Because the controller is mounted on the enclosure door, a conductive strap must be used between the enclosure and the door.
PAGE 5
INSTALLATION (continued) Functional Test The Functional Test consists of three checks: manual operation, voltage checks, and electrical operation. ! Do these checks in the order presented to avoid damaging the automatic transfer switch. hole Read all instructions on the Wiring Diagram and labels affixed to the automatic transfer switch. Note the control features that are provided and review their operation before proceeding.
PAGE 6
INSTALLATION (continued) observe these lights TRANSFER SWITCH TEST BYPASS TIME DELAY Press for 15 Seconds SET ENGINE EXERCISER Press until light FLASHES Figure 1–5. Standard controls and indicators. 2 – Voltage Checks First check nameplate on transfer switch; rated voltage must be the same as normal and emergency line voltages. ! Verify that the feeders have been connected to the proper lugs. Close the normal source circuit breaker.
PAGE 7
INSTALLATION (continued) observe these lights press this button TRANSFER SWITCH TEST BYPASS TIME DELAY Press for 15 Seconds SET ENGINE EXERCISER Press until light FLASHES Figure 1–6. Standard controls and indicators. 3 – Electrical Operation This procedure will check the electrical operation of the Automatic Transfer Switch. See Figure 1–6. ! The normal source must be available and the generator 1 must be ready to start. Check that the Normal Source Available light is on.
PAGE 8
SECTION 2 SEQUENCE OF OPERATION lights show position of transfer switch lights show the sources available Transfer To Emergency The sequence for load transfer to emergency source begins automatically when normal source voltage falls below the preset dropout point or when Transfer Switch Test button is pressed. An under voltage condition on any phase of the normal source is detected by the sensor. light for built–in engine exercise timer · blinks rapidly when button is held 5 sec.
PAGE 9
SECTION 3 TESTING & SERVICE PREVENTIVE MAINTENANCE DISCONNECTING THE CONTROLLER Reasonable care in preventive maintenance will ensure high reliability and long life for the automatic transfer switch. The harness disconnect plugs are furnished for repair purposes only and should not have to be unplugged. If the controller must be isolated, follow these steps carefully. Operate the switch at least once a month. Perform this 4–step Electrical Operation Test (test with load transfer).
PAGE 10
TESTING & SERVICE (continued) MANUAL LOAD TRANSFER 1. Open normal and emergency source circuit breakers. 2. Use the maintenance handle to manually operate transfer switch to the opposite source. See page 1–3, Manual Operation Test. 3. If the transfer switch is in the Emergency position manually start the engine generator and then close the emergency source circuit breaker. This procedure will manually transfer the load if the controller is disconnected.
PAGE 11
SECTION 4 ADJUSTMENTS Time Delay Adjustment To change a setting, follow procedure on page 4-2. Use Table 4-1 as a guide to time delay values and their corresponding adjustment DIP switch or potentiometer. Standard time delays are set to customer specifications (if none specified, standard factory settings are used). Table 4-1.
PAGE 12
ADJUSTMENTS ! (continued) cover Do not make any setting changes while the controller is energized. thumb latch How to Change a Setting hook on left side 1. Prevent the transfer switch from operating by disconnecting one source first, then the other, as follows: a. b. If the transfer switch is in the Normal position, open the emergency source circuit breaker. Turn the engine starting control to off. Then open the normal source circuit breaker. Figure 4-1. Controller cover latch.
PAGE 13
SECTION 5 CONTROL FEATURES – ENGINE EXERCISERS These timers periodically exercise the emergency engine-generator plant. They can be set to exercise with or without load transfer, or they can be completely disabled. The engine-generator should be exercised under load once a week for a minimum time period of 20 minutes, or follow the recommendations of the engine-generator set manufacturer. Refer to page 4–2 for location of DIP switches, battery (provided), and jumper block in the controller.
PAGE 14
CONTROL FEATURES (continued) Optional Accessory 11BG – SOURCE AVAILABILITY SIGNAL & PROGRAMMABLE ENGINE EXERCISER MODULE 2–line display connections for source availability signal contacts 3 buttons Figure 5–2. Accessory 11BG module (mounted behind operator interface and connected to the controller) includes source availability signal contacts and a programmable engine exerciser.
PAGE 15
CONTROL FEATURES (continued) How to Set Optional Programmable Engine Exerciser (part of Acc. 11BG module) Start Time Display The Start Time Display shows the engine exerciser start time.
PAGE 16
CONTROL FEATURES (continued) Programmable Engine Exerciser Settings Fill in your settings for future reference Weekly or Bi–weekly Every = weekly Alt = bi–weekly Day of Week Start Time 0 – 23 hour Sun through Sat 0 – 59 minute Run Time 0 – 23 hour 0 – 59 minute 30 minutes is the default setting Date exerciser was set ______________________________________ 5--4
PAGE 17
CONTROL FEATURES (continued) INPHASE MONITOR FOR MOTOR LOAD TRANSFER LOAD DISCONNECT FEATURE Inphase monitoring logic controls transfer and retransfer of motor loads, so that inrush currents do not exceed normal starting currents. It avoids nuisance tripping of circuit breakers and mechanical damage to motor couplings. The Motor Load Transfer feature is built into the controller. DIP switch S1 (actuator 5) activates this feature: right = ON, left = OFF.
PAGE 18
CONTROL FEATURES (continued) OPTIONAL STRIP HEATER (Accessory 44) Accessory 44 Strip Heater is designed to keep ambient temperatures within the Automatic Transfer Switch enclosure at acceptable levels. This accessory consists of a mounting bracket with strip heater, thermostat, and terminal block. A transformer with fuses is included when the power for the assembly is derived from voltages above 120 V ac. The 120 V ac customer powered assembly does not include a transformer.
PAGE 19
A accessories, see optional accessories auxiliary circuits, 1–3 B barriers, 1–1 battery, 4–2, 5–1 buttons, push, 3–1 bypass time delay, 1–5, 2–1, 3–1 C cable lugs, 1–1 preparation, 1–1 catalog number, inside cover cleaning, 3–1 connections engine control contact, 1–2 line, 1–1 contacts auxiliary, 1–2 engine control, 1–2 main, 3–1 source availability signal, 5–2 control features, 5–1 load disconnect, 5–5 motor load transfer, 5–5 (optional Accessory) plant exerciser, 5–1, 5–2, 5–3, 5–4 controller, 4–1, 4–2