Operator`s manual

ManualsBrandsASCO POWER TECHNOLOGIES ManualsComputer equipmentSeries 300

381333–067 D

ASCO POWER TECHNOLOGIES L.P. 50 Hanover Road, Florham Park, New Jersey 07932–1591 USA

telephone 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

30 th roug h 400 amp. size s

225–400 amp sizes

An experienced licensed electrician must install the ATS.

DANGER is used in this manual to warn of high

voltages capable of cau si ng shock , burn s, or death.

WARNINGisusedinthismanualto

warn of possible personal injury.

CAUTIONisusedinthismanualtowarn

of possible equipment damage.

Ref er to the outline and wiring drawings provided with

your ASCO Series 300 ATS for all i nstallation details.

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

Listed under Underwriters Laboratories UL 1008 Standard

for Safety for Automatic Transfer Switc hes. 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 autom atic

transfer switches meet OSHA Safety Requirements and will

be accep tab l e to elec tric al inspector s.

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 suita ble for the requirements of NEC Article

517 – Health Care Facilities, NEC Article 701 – Legally

Required Standby Systems, NEC Article 702 – Optional

Standby Systems, NFPA 99 Health Care Facilities, and

NFPA 110 Emergency and Sta ndby Power Systems.

Rating Label

Eac h automatic transfer switc h contains a rating label to

define the loads and fault circuit withstand / cl osing 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

INST ALLATION 1..........................

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

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

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

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

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

Summary of content (20 pages)

PAGE 1
Operator’s Manual Series 300 Automatic Transfer Switches 30 through 400 amp. sizes Refer to the outline and wiring drawings provided with your ASCO Series 300 ATS for all installation details. ASCO Series 300 Automatic Transfer Switches (ATSs) are Listed under Underwriters Laboratories UL 1008 Standard for Safety for Automatic Transfer Switches. ASCO Series 300s are also Listed under CSA C22.2 No. 178 Standard for Automatic Transfer Switches.
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. 30, 70, 104 amp Catalog No.
PAGE 3
terminals for switch position contacts membrane controls load power connections emergency power connections Transfer Switch terminals for engine start contacts normal power connections 200 amp.
PAGE 4
The example is for a Series 300 ATS with switched neutral, 3 pole, 400 amp, 480 V, in a Type 1 enclosure: 225, 260, 400 amp Catalog No.
PAGE 5
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 225, 260, and 400 ampere transfer switches.
PAGE 6
INSTALLATION (continued) Three cable spacers are included with 150 and 200 ampere transfer switches. When installing power cables, run the cables through the cable spacers as shown in Figure 1–2. Position cable spacers within 1½ inches from lugs. ! The cable spacers must be located as shown for 150 and 200 ampere transfer switches. cable spacers 1 ½ inch approximate Table A. Engine start connections.
PAGE 7
INSTALLATION (continued) Controller Ground Harnesses 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. This connection provides proper grounding which does not rely upon the door hinges. The transfer switch is connected to the left side of the controller by a plug–in harness (two plugs).
PAGE 8
INSTALLATION (continued) observe these lights TRANSFER SWITCH TEST BYPASS TIME DELAY Press for 15 Seconds SET ENGINE EXERCISER Press until light FLASHES Figure 1–8. 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 9
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 1–9. Standard controls and indicators. 3 – Electrical Operation First check nameplate on transfer switch; rated voltage must be the same as normal and emergency line voltages. ! 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 10
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 11
SECTION 3 TESTING & SERVICE PREVENTIVE MAINTENANCE DISCONNECTING THE CONTROLLER Reasonable care in preventive maintenance will insure 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 four step Electrical Operation Test. This is a test with load transfer.
PAGE 12
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 13
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 14
ADJUSTMENTS (continued) ! Do not make any setting changes while the controller is energized. thumb latch cover How to Change a Setting 1. Prevent the transfer switch from operating by disconnecting one source first, then the other, as follows: a. b. hook on left side 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 15
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 16
CONTROL FEATURES (continued) OPTIONAL PROGRAMMABLE ENGINE EXERCISER (Accessory 11CD) The optional programmable engine exerciser provides seven days of different exercise periods. The timer is connected and mounted below the controller. A permanent backup battery maintains the setting; when power is lost to timer, output switch deenergizes. DIP Switch Settings 8 5 Actuator 8 on S2 DIP SWITCH Actuator 5 off Actuator 5 on 5 8 Exercise with Load Actuator 8 off 7 Opt. Timer Enabled Opt.
PAGE 17
CONTROL FEATURES (continued) How to Set Optional Programmable Engine Exerciser (Accessory 11CD) ! Proceed with care! The automatic transfer switch is energized. Press Button Display Meaning 1 reset 1234567 (blink) 00 00 ¬ f after self-test, clears memory 2 hold h, then press ±1h  Note 3 1234567 AM 12 00 ¬ f hold ¬ while setting thru step 7 4 ±1h once (if Daylight Saving Time) ±1h do nothing if it is Standard Time.
PAGE 18
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 19
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 20
INDEX A 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 spacers, 1–2 illustration of, 1–2 catalog number, inside cover cleaning, 3–1 connections engine control contact, 1–2 line, 1–1 control features, 5–1 load disconnect, 5–4 motor load transfer, 5–4 (optional Accessory) plant exerciser, 5–1 controller, 4–1, 4–2 codes, cover cover removal, 4–2 disconnecting, 3–1 time delay potentiometers, 4–2 D DIP Switches,