User manual

ManualsBrandsEmerson ManualsSwitchSwitch 300

381333–228 G

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

For sales or service call 1 800 800–2726 (ASCO) www.ascopower.com

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

Operator’s

Manual

Seri es 300

Automatic Transfer Switches

D–design, 30 through 230 A

DANGER is used in this manual to warn of high

voltages capable of cau si n g shock , burns, or death .

WARNINGisusedinthismanualtowarn

of possible personal injury.

CAUTIONisusedinthismanualtowarn

of possible equipment damage.

An exp erienced licensed electric ian must install the AT S.

30–200 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 Automatic Transfer Switches. ASCO Series

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

Automatic Transfer Switches . A l l control features are UL

Componen t Recogn ized, which assures that ASCO auto-

matic transfer switches meet OSH A Safety Requirements

and wil l be accep tab l e to electr ic al inspec tors .

A SCO Series 300 A utomatic Transfer Switches are suitable

for emergency and standby system applications. They meet

emer g enc y system rating requiremen ts as defined in Na-

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

Also, they are suitable for the requirements of NEC Article

517 – He al t h Care Facilities, NEC Article 701 – Legally

Required Standby Systems, NEC Article 702 – Optional

Standb y System s , NFPA 99 Heal th Care Facil ities , and

NFPA 110 Emergenc y and Standby P ower Systems.

Rating Label

Eac h autom atic transfer switc h contains a rating lab el to

define the loads and fault circuit withstand / closing ratings.

Refer to the lab el 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 (20 pages)

PAGE 1
Series 300 Automatic Transfer Switches D–design, 30 through 230 A Operator’s Manual 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 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, 200 amp, 480 V, in a Type 1 enclosure: D 300 Neutral B – switched C – overlapping blank – solid B Phase Poles 2 – single Ø 3 – three Ø 3 200 Amperes 30 70 104 150 200 * * 200 amp.
PAGE 3
Catalog Number Identification A typical Catalog Number is shown below with its elements explained. The example is for a Series 300 ATS with switched neutral, 3 pole, 230 amp, 480 V, in a Type 1 enclosure: D 300 Neutral B – switched C – overlapping B Phase Poles 2 – single Ø 3 – three Ø 3 230 Amperes 230 ** blank – solid ** 230 amp.
PAGE 4
SECTION 1 INSTALLATION Connecting Power Conductors Series 300 Automatic Transfer Switches are factory wired and tested. Installation requires skid removal then securing the enclosure to the supporting foundation. Mounting Refer to the applicable enclosure outline drawing furnished with this switch and mount the Series 300 according to details and instructions shown on diagram.
PAGE 5
INSTALLATION (continued) Engine Starting Contacts Controller Ground Customer connections for engine control contact connections are located on the transfer switch. Refer to wiring diagram provided with the Series 300 ATS and connect the engine start wires to the appropriate terminals. See Figure 1–2 and Table A. A grounding wire must be connected to the controller’s lower left mounting stud.
PAGE 6
INSTALLATION (continued) Functional Test The Functional Test consists of three checks: manual operation, voltage checks, and electrical operation. Position of the transfer switch is indicated here weight marked N (normal) and E (emergency) Do these checks in the order presented to avoid damaging the automatic transfer switch. Read all instructions on the Wiring Diagram and labels affixed to the automatic transfer switch.
PAGE 7
INSTALLATION (continued) observe these lights 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. The Normal Transfer 1 Switch Position and the Normal Source Accepted lights should come on.
PAGE 8
INSTALLATION (continued) observe these lights press this button Figure 1–6. 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 Accepted light is on. Press and hold the Transfer Test button until the engine starts 2 and runs. This should happen within 15 sec.
PAGE 9
SECTION 2 SEQUENCE OF OPERATION Lights show position of transfer switch. 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 Test button is pressed. An under voltage condition on any phase of the normal source is detected by the sensor. Lights show the sources accepted. Light for built–in engine exercise timer: ³ blinks rapidly when button is held 5 sec.
PAGE 10
SECTION 3 TESTING & SERVICE PREVENTIVE MAINTENANCE DISCONNECTING THE CONTROLLER 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. For high reliability and long life for the ATS: Operate the switch at least once a month. Perform this 4–step Electrical Operation Test (test with load transfer). Disconnecting the Plugs Do not unplug the controller until step 1a. or 1b.
PAGE 11
TESTING & SERVICE (continued) MANUAL LOAD TRANSFER 1. Open normal and emergency source circuit breakers. This procedure will manually transfer the load if the controller is disconnected. 2. Use the maintenance handle to manually operate transfer switch to the opposite source. See page 1–3, Manual Operation Test. Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers. 3.
PAGE 12
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 13
ADJUSTMENTS (continued) cover Do not make any setting changes while the controller is energized. thumb latch 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 14
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 15
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 16
CONTROL FEATURES (continued) How to Set Optional Programmable Engine Exerciser (part of Acc. 11BG module) Hazardous voltage capable of causing shock, burns, or death is used in this transfer switch. Deenergize both Normal & Emergency power sources before programming the exerciser. Use the UP and DOWN arrow keys to move through the displays.
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
PAGE 20
A accessories, 5–2, 5–5 auxiliary circuits, 1–2 B battery, 4–2, 5–1 buttons, push, 3–1 bypass time delay, 1–5, 2–1, 3–1 C cable lugs, preparation, 1–1 catalog number, cover cleaning, 3–1 connections engine control contact, 1–2 line, 1–1 contacts auxiliary, 1–2 engine control, 1–2 main, 1–3, 3–1 source availability signal, 5–2 H INDEX handle, maintenance, 1–3 warning, 1–3 parts, 3–1 harness, 1–2 disconnect plugs, 3–1 programmable engine exerciser, 5–2, 5–3 engine exerciser, 5–1, 5–2, 5–3 engine star