Emerson 400A User Manual
Operator’s
Manual
DANGER is used in this manual to warn of a
hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING is used in this manual to warn of a
hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION is used in this manual to warn of a
hazardous situation which, if not avoided, could
result in minor or moderate injury.
Series 300
Automatic Transfer Switches
E–desi g n, 260 and 400 A
Refer to the outline and wiring drawings provided with
your ASCO Series 300 ATS for all installation details.
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.
An experienced licensed electrician must install the
Automatic Transfer Switch (ATS).
TABLE OF CONTENTS
section-page
INSTALLATION 1-1........................
Mounting and Line Connections 1-1.........
Engine Starting Contacts 1-2...............
Input / Output Label 1-2....................
Functional Test 1-3, 1-4, 1-5.................
SEQUENCE OF OPERATION 2-1...........
TESTING & SERVICE 3-1..................
Preventive Maintenance 3-1................
Transfer Test 3-1..........................
Disconnecting the Controller 3-1............
Manual Load Transfer 3-2..................
Trouble-Shooting 3-2......................
ADJUSTMENTS 4-1.......................
Time Delay and Sensor Adjustments 4-1.....
How to Change a Setting 4-2...............
CONTROL FEATURES 5-1.................
Engine Exercisers 5-1, 5-2, 5-3..............
Motor Load Transfer 5-4...................
Load Disconnect & Remote Control 5-4......
INDEX back of manual.....................
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
381333–067 K
Nameplate and Catalog Number Identi fic ation
The Transfer Switch nameplate includes data for each specific ASCO Series 300 AT S. 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 ampere, 480 V, in a Type 1 enclosure:
E 300 C 3 400 N 1 C
transfer switch
prefix letter
Neutral
C – overlapping
blank – solid
load power
connections
emergency power
connections
Phase Poles
2 –singleØ
3 –threeØ
Amperes Voltage Controller Enclosure
260
400
A 115
B 120
C 208
D 220
E 230
F 240
H 380
J 400
K 415
L 440
M 460
N 480
Q 575
R 600
1 –standard
1X –if
accessories
ordered
C –type1
F –type3R
G –type4
L –type12
blank – open type
membrane
controls
terminals for
engine start
contacts
Transfer
Switch
terminals for
switch position
contacts
normal power
connections
400 ampere size in typical enclosure with location of customer connections
Controller
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.
If bottom cable entry is used, the foundation must be
prepared so that the conduit stubs are located correctly.
Refer to the enclosure outline drawing for specified area
and location. Provide cable bending space and clearance
to live metal parts. When a concrete floor is poured, use
interlocking conduit spacer caps or a wood or metal
template to maintain proper conduit alignment.
Mounting
Be sure that the insulator piece is behind 260 and
400 ampere transfer switches.
insulator
backing
piece
Figure 1-1. Insulator backing piece for 260 and 400
ampere transfer switches.
Refer to the applicable enclosure outline drawing
furnished with this switch and mount the Series 300
according to details and instructions shown on diagram.
NOTICE
Protect the automatic transfer switch from
construction grit and metal chips to prevent
malfunction or shortened life of the AT S.
Mount the ATS vertically to a rigid supporting structure.
Level all mounting points by using flat washers behind
the holes to avoid distortion of the switch.
Transfer switches rated 260 and 400 amperes are
mounted on an insulator backing piece (installed behind
the transfer switch). If the transfer switch is removed
from the cabinet and then reinstalled, this insulator
piece must be placed behind the transfer switch. See
Figure 1–1.
Line Connections
Refer to the Wiring Diagram provided with your Series
300 ATS. All wiring must be made in accordance with
the National Electrical Code and local codes.
De–energize the conductors before making any
line or auxiliary circuitry connections. Be sure
that Normal and Emergency line connections are
in proper phase rotation. Place engine generator
starting control in the OFF position. Make sure
engine generator is not in operation.
It is not necessary to remove the barriers from the
transfer switches to install cables.
1 --- 1
The controller is mounted on the cabinet door. An
add-on DIN rail is provided for some optional accessories and is mounted below the controller on the door.
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-suspended hangers often requires considerable
force. The pulling of cables can damage insulation and
stretch or break the conductor’s strands. For this reason,
after the cables are pulled into position, and before
are connected, they should be tested to verify that they
arenotdefectiveorhavebeendamagedduring
installation.
they
Connecting Power Conductors
After the power cables have been tested, connect them
to the appropriate terminal lugs on the transfer switch as
shown on the wiring diagram provided with this Series
300. Make sure the lugs provided are suitable for use
with the cables being installed. Standard terminal lugs
are solderless screw type and will accept the wire sizes
listed on the drawings provided with the Series 300 ATS.
Be careful when stripping insulation from the cables;
avoid nicking or ringing the conductor. Remove surface
oxides from cables by cleaning with a wire brush. When
aluminum cable is used, apply joint compound t o
conductors. Tighten cable lugs to the torque specified
on rating label.
Do not run cables behi nd the switch. Cables can be
bundled on the right side of the switch. Maintain proper
electrical clearance between the live metal parts and
grounded metal: ½ inch minimum.
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 T abl e A, shown in Figure 1–2.
Table A. Engine start connections.
When normal source
fails
contact closes TB14 and TB15
contact opens TB14 and TB16
Transfer Swit c h
Terminals on transfer
switch
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 betwee n the enclosure and the door. This
connection provides proper grounding which does not
rely upon the door hinges.
Harnesses
The transfer switch is connected to the left side of the
controller by a plug–in harness (two plugs).
Auxiliary Circuits
Connect auxiliary circuit wires to appropriate terminals
on transfer switch. Note the control features that are
furnished on this switch. Make the necessary auxiliary
connections by referring to Section 5, Control Features.
Figure 1-2. Engine starting contact label and location
for 260 and 400 ampere transfer switches.
Connections to Controller for other Control Features (located on bottom of Controller):
Load Disconnect
Feature
Connections
(see Wiring Diagram
& refer to page 5–5
for DIP switch settings)
Programmable
Engine Exerciser
connection,
if provided
(refer to
page 5–2)
Remote Control Features Connections
(refer to the Wiring Diagram &
page 5–5 for DIP switch settings)
Each control contact must be suitable
for a 5 V DC low energy circuit.
for factory
use only
Figure 1-3. Input / output label on the Controller showing possible connections to the lower terminal block.
1 --- 2
Loading...