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ASCO Series 300 Automatic Transfer Switches (ATSs) are

Listed under Underwriters Laboratories UL 1008 Standard

for Safety for Automatic Transfer Switches. All control

features are UL Component Recognized, which assures that

ASCO automatic transfer switches meet OSHA Safety

Requirements and will be acceptable to electrical inspectors.
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 Systems, NEC Article 702 – Optional

Standby Systems, NFPA 99 Health Care Facilities, and

NFPA 110 Emergency and Standby Power Systems.

Rating Label

Each automatic transfer switch contains a rating label to

define the loads and fault circuit withstand / closing ratings.

Refer to the label on the transfer switch for specific values.

Do not exceed the values on the rating label.

Exceeding the rating can cause personal injury

or serious equipment damage.

terminal block TB

for engine start

and switch

position contacts

Transfer

Switch

Controller

power

connections

power

connections

membrane

controls

800 and 1000 amp. size in typical enclosure with location of customer connections

neutral

connections

neutral

connections

Содержание ASCO 300 Series

Страница 1: ... 600 through 1200 amps 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 ASCO Series 300 ATS for installatio...

Страница 2: ...s Neutral C overlapping Amperes Voltage Controller Enclosure B switched 1 standard G type 4 C type 1 F type 3R L type 12 3 three Ø 2 single Ø D 220 C 208 E 230 K 415 M 460 J 400 L 440 N 480 F 240 H 380 Q 575 P 550 R 600 1200 1000 600 800 blank solid blank open type available 600 1000 amp sizes only 1X if accessories ordered terminal block TB for engine start and switch position contacts Transfer S...

Страница 3: ... 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 Standby Power Systems Rating Label Each automatic transfer switch contains a rating label to define the loads and fault circuit withstand closing ratings Refer to the label on the transfer switch for specific ...

Страница 4: ... start and switch position contacts Transfer Switch Controller power connections power connections membrane controls 1200 amp size in typical enclosure with location of customer connections neutral connections neutral connections ...

Страница 5: ...tion Make sure engine generator is not in operation Testing Power Conductors Do not connect the power conductors to the ASCO Series 300 transfer switch until they are tested Installing power cables in conduit cable troughs and ceiling sus pended hangers often requires considerable force The pulling of cables can damage insulation and stretch or break the conductor s strands For this reason after t...

Страница 6: ...terminals See Figure 1 1 and Table A Table A Engine start connections When normal source fails Terminals on transfer switch contact closes TB1 and TB2 contact opens TB1 and TB3 Auxiliary Circuits Connect auxiliary circuit wires to appropriate terminals on transfer switch terminal block TB as shown on the wiring diagram provided with this Series 300 Automatic Transfer Switch Make the neces sary aux...

Страница 7: ...B 2 Move the maintenance handle up or down as shown to manually operate the transfer switch It should operate smoothly without any binding If it does not check for shipping damage or construction debris Table B Maintenance handle positions ATS Position Handle Indicators Normal E N up E O upper contacts open N C lower contacts closed Emergency E N down E C upper contacts closed N O lower contacts o...

Страница 8: ...al source circuit breaker The Normal Transfer Switch Position and the Normal Source Accepted lights should come on Source Accepted Normal Emergency 2 Use an accurate voltmeter to check phase to phase and phase to neutral voltages pres ent at the transfer switch normal source terminals 3 Close the emergency source circuit breaker Start generator if necessary The Emergency Source Accepted light shou...

Страница 9: ...ht is on Source Accepted Normal Emergency 2 Press and hold the Transfer Test button until the engine starts and runs This should happen within 15 sec Transfer Test 3 The Emergency Source Accepted light should come on Source Accepted Normal Emergency 4 The transfer switch should transfer to the Emergency position The Emergency Transfer Switch Position light should come on and the Normal light shoul...

Страница 10: ...ency source is accepted by the sensor relay ER begins its timing cycle transfer to emergency delay ER relay is provided with an adjustable 0 to 5 minutes time delay on pickup to delay transfer of the load to the emergency source For immediate transfer press Bypass Time Delay button ER relay energizes the TS coil is energized the transfer switch operates and all switch contacts mains controls auxil...

Страница 11: ...rness 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 Disconnecting the Plugs Do not unplug the controller until step 1a or 1b below is completed 1 Observe the position of the transfer switch a If the transfer switch is in the Normal position place standby engine starting control in the off ...

Страница 12: ...tory settings Transfer switch does not transfer the load to normal source when normal returns or when Transfer Test button is released Wait for Retransfer to Normal Delay 1 sec to 30 min to time out For immediate re transfer press Bypass Time Delay button If Motor Load Transfer is active wait for in phase condition see below Voltmeter should read at least 90 of nominal phase to phase voltage betwe...

Страница 13: ...ing DIP switch actuators Any change in these settings may affect the normal operation of the automatic transfer switch This change could allow the load circuits to remain connected to a low voltage source Table 4 2 Voltage and Frequency Settings Shaded DIP switches are standard factory settings DESCRIPTION LABELS SETTING of nominal S1 DIP DESCRIPTION LABELS SETTING FACT SET ADJ RANGE S1 DIP SWITCH...

Страница 14: ...inted tool to slide the switch actuators left or right so they match the il lustration next to the setting left off right on Recheck the setting See Figure 4 4 7 Install the cover on the controller by hooking it on the left side and latching the right side 8 Reconnect both harness plugs to the controller by aligning and pressing straight in until latches click Close the enclosure door 9 Close the ...

Страница 15: ...er min cooldown Press to cancel an active exercise period stops generator Press and hold for 5 sec or until status light blinks rapidly to set exercise period immediately and every week hereafter generator starts Figure 5 1 Operator panel pushbuttons and light Select below either Exercise without Load or Exercise with Load according to the setting of DIP switch S1 actuator 8 The load transfers fro...

Страница 16: ...nergized Figure 5 3 Source availability signal contacts Programmable Engine Exerciser The module includes a programmable engine exerciser that provides for weekly or biweekly operation This optional exercise timer may have to be turned on enabled by setting the S1 DIP switch actuator 7 to off and S2 DIP switch actuator 5 to off A backup battery in the controller see page 4 2 and page 5 3 must be t...

Страница 17: ... the exerciser will always run on the week designated 1 on the date display Run Time Display The Run Time Display shows the run time for the engine exerciser The default setting from the factory is 30 minutes Time Display The Time Display shows the present system time The format is hours minutes seconds NOTE During total power outages power to the accessory is maintained by a battery in the Contro...

Страница 18: ...er Time delay between the load disconnect control signal and initiation of transfer is set on the controller with DIP switch S2 actuators 6 7 8 as shown below Delay Before Transfer LD TDBT S2 DIP SWITCH 0 disable Actuator 7 on Actuator 8 on 8 7 3 seconds Actuator 7 on Actuator 8 off 8 7 10 seconds Actuator 7 off Actuator 8 on 8 7 20 seconds Actuator 7 off Actuator 8 off 8 7 Shaded DIP switches are...

Страница 19: ... available factory installed or in kit form Turn the thermostat s dial to required setting as shown dial turn counterclockwise to lower temperature turn clockwise to raise temperature thermostat Figure 5 4 Thermostat AVAILABLE KITS FROM ASCO Controls Description Accessory Kit Programmable Engine Exerciser Source Availability Contacts 11BG K629830 Serial Communication Module 72A K601110 Strip Heate...

Страница 20: ...puts 1 2 rating cover lights 1 4 5 1 load disconnect feature 5 4 lubrication 3 1 M maintenance preventive 3 1 manual load transfer 3 2 warning 3 2 manual operation 1 3 warning 1 3 motor load transfer feature 5 4 N nameplate cover O operation electrical 1 5 manual 1 3 illustration of 1 3 warning 1 3 sequence of 2 1 optional accessories programmable engine exerciser source availability signal contac...

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