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Product
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Type 230-PM Combination
Controller, 2300V & 4160V
(PDF)
The Type 230-PM is
especially designed for outdoor use in Class
I,
Division 2, hazardous locations. With most optional features, the Type
230-PM controllers include “U L Label w/Listing Mark,” in order to establish
acceptability under OSHA regulations. UL listing is made under their
Standard UL‑347, which includes review of Raintight enclosure but does not
include review of suitability for Class
I,
Division 2 use. The Type 230-PM controllers are also UL‑listed with many
optional features for Division 2 use under UL-1604.
The Type 230-PM
controllers include heavy-duty vacuum-interrupter contactor. The contactors
are rated 360‑amps continuous, 414-amps service limit. Repetitive
load-interrupting ratings were witness-tested at 5KA for the 230-PM. The
overall controller rating depends upon fuse size and fuse mounting, as well
as cabinet ventilation.
IMPORTANT FEATURES &
BENEFITS
+ Vertical Equipment
Arrangement for fast and safe maintenance
+ Visible‑break Isolating Switch for maximum safety
+ Vacuum‑break Contactor for long contact life
+ Corrosion Resisting Design of All Components and Enclosure
+ U. L. Review and Testing to assure compliance with safety standards
+ Coordinated Design of Elliott‑manufactured Components
+ Made in U.S.A. to U.S.A. Standard.
SCOPE & SUMMARY
This bulletin outlines
applications, design features, construction, equipment arrangement, and
space planning, for the Type 230‑PM controllers. These controllers are
similar to the Type 230, which were introduced in 1980, with the added
feature that the Type 230‑PM are outdoor type including support frame for
pier‑mounting, with cabinet and frame hot‑dip galvanized after fabrication.
These controllers are for the control and protection of induction motors or
transformers on 2300‑4160‑volt systems.
Each Type 230‑PM
controller is a NEMA Class E2 coordinated combination of heavy-duty vacuum
contactor, thermal overload relay, current transformers, and
current-limiting fuses, with safety-interlocked isolating switch. The basic
design and most optional features are suitable for Class I,
Division 2 hazardous locations. Cabinet width is 34‑inches and overall
height is 90‑inches.
APPLICATIONS
GENERAL The 230‑PM controllers are for full‑voltage,
non‑reversing, magnetic starting and protection of induction motors. Or
they may be used to switch and protect transformers. Optionally, the
contactor may be mechanically "latched" for transformer or feeder
applications. Alternate designs are available for reduced‑voltage starting
and for synchronous motor control.
SYSTEM CAPACITY These controllers may be used on power systems
capable of producing fault currents up to 80,000‑amps RMS asymmetrical. On
a 3‑phase basis, that corresponds to 200‑MVA at 2300‑volts and 350‑MVA at
4160‑volts for symmetrical current calculations. This assumes 1.6 ratio
between asymmetrical current and initial symmetrical current, for
first-cycle fault interruption.
LOADS The 230‑PM controller is made in three continuous current
ratings: 180‑amp, 240‑amp, and 360‑amp. These ratings typically may be used
for control of induction motors up to 700‑HP, 100‑HP, and 1500‑HP at
2300‑volts or up to 1250‑HP, 1750‑HP, and 2500‑HP at 4160‑volts, or higher,
depending upon service factor and locked rotor current. All controller
ratings incorporate the same 360-amp contactor but differ in fuse sizes and
cabinet arrangements.
LOCATION The 230‑PM controllers are particularly suited to
outdoor installation and to other installations where protection from dust
or corrosive conditions is desirable. The basic design and most
optional features are suitable for Class I, Division 2 hazardous locations.
DESIGN FEATURES &
CONSTRUCTION
GENERAL Each 230‑PM Controller is a NEMA Class E2 coordinated
combination of a heavy‑duty vacuum contactor, thermal overload relay,
current transformers, and current limiting fuses, with safety-interlocked
isolating switch. These major elements, with the accessory and optional
parts, are metal-enclosed, factory assembled, and interconnected. The
controller is front‑connected with all parts readily accessible. The power
elements are arranged vertically for easy and safe installation, operation,
and maintenance.
STANDARDS & TESTING The Type 230‑PM Controllers are made in
U.S.A. to U.S.A. standards, especially NEMA ICS 2‑324 and UL‑347. The basic
design and many optional features have been submitted for "third party
review" to Underwriters Laboratories (U.L.) to assure compliance with design
and safety standards. Detailed test reports are available. U.L. Inspection
and Labels are available optionally for many applications and arrangements.
OPERATION A heavy‑duty vacuum contactor is the power switching
element. It is controlled through a DC master relay by the customer's 115‑VAC
pushbutton or other master element, with control power from a self-contained
transformer. Optionally, start and stop control switches may be included in
the controller. The contactor stays closed on momentary voltage dips but
opens on prolonged loss‑of-voltage.
PROTECTION Three main-line fuses and two control transformer
primary fuses provide high‑speed fault protection with current-limiting
effect. A 3‑element thermal overload relay provides running overcurrent
protection. Optionally, an instantaneous ground fault protective relay
provides added system protection on resistance or impedance grounded
systems. Optionally, a multi-function, microprocessor based, protective
relay provides added motor protection. The fuses are coordinated with the
overload and protective relays, so that the contactor interrupts any
overcurrents up to locked‑rotor current and the fuses interrupt only fault
currents that exceed the contactor rating.
SAFETY The isolating switch is manually operated to isolate the
controller and the circuit from the power supply. The isolating switch may
be padlocked open or closed. The enclosure may be padlocked closed. A
viewing window permits checking the isolating switch position, when the
cabinet door is closed. Mechanical interlocks prevent opening the door
before opening the isolating switch or closing the isolating switch with the
door open. An ammeter shows load current.
ENCLOSURE & MOUNTING The controller enclosure consists of a
control cabinet mounted on a support‑frame. The cabinet is gasketed,
weather‑resistant, and ventilated dustight, with space heater. A unique
cabinet and door arrangement makes the cabinet raintight in a 65-mph wind
even if the door gaskets are removed. Grouped controllers are equipped with
self‑contained, interconnecting main-bus and are mounted on a common
support‑frame side‑by‑side and/or back‑to‑back.
LIVE PARTS BARRIER When the isolating switch is open and the door
may be opened, the line contacts of the isolating switch and the
incoming‑line terminals or bus, are the only parts still energized. These
parts are at the top of the cabinet. Accidental contact with these
energized parts is prevented by a vertical, grounded "Live Parts Barrier"
and by a horizontal barrier. A maintenance shutter is available for added
safety when working near the live parts.
ISOLATING SWITCH The safety‑interlocked isolating switch is
3‑pole, gang‑operated, with external operating handle. Contact travel is
vertical, and the air‑gap is easily seen when the switch is open. To
prevent accidental operation under load, the isolating switch and the main
contactor are mechanically interlocked with a control-power switch which is
externally operated. The isolating switch may be opened or closed only when
the control-power switch is in the "stop" position and the main contactor is
open.
FUSES The main‑line fuses are ribbon element, totally enclosed,
and non‑vented, mounted in fixed position with bolted-in fuse-clamps. When
these fuses interrupt, there is no noise and any pressure generated is
self-contained and sealed. These fuses exhibit an increase in resistance
immediately after melting, so that they have a current limiting effect on
major fault currents. For Class I,
Division 2 applications, these fuses are completely sealed (without
operation indicators).
CONTACTOR The heavy‑duty vacuum contactor is solenoid operated,
and the solenoid is energized through a rectifier at 115‑volts. The
contactor is designed and tested for high momentary current-carrying and
reliable current-interrupting. Auxiliary contacts are hermetically‑sealed.
Optionally, the contactor includes a position indicator with viewing window.
OVERLOAD RELAY The thermal-overload relay is ambient compensated
type, 3-element. The current-elements are energized from current
transformers. The relay may be arranged for automatic reset when used with
3‑wire control circuit. Optionally, the relay may be equipped with an
external, manual reset.
FINISH The cabinet and support-frame are hot-dip galvanized after
fabrication. External hardware, shafts, pins, and springs, are stainless.
Current-carrying contacts and connections are hermetically-sealed or
specially plated for maximum corrosion resistance.
SCHEMATIC
DIAGRAM
EQUIPMENT ARRANGEMENT
Mounted in the Control Cabinet:
L1/3 Incoming Line Connectors
BUS Main Bus
ISW Isolating Switch with Interlocks
MFU Main Line Fuse
M Vacuum-break Contactor
TFU Transformer Primary Fuse
isw HV Auxiliary Switch on ISW
CPT Control Power Transformer
CT Current Transformer
OL Overload Relay
AM Ammeter
T1/3 Load Terminal Connector
CFU Control Fuse
CSW Stop-On Control-Power Switch
REC Rectifier for Contactor Coil
RES Resistor for Contactor Coil
m Auxiliary Contact on Contactor
MR Master Control Relay
CREC Rectifier for MR
HTR Space Heater
TB Control Terminal Block
- Application Nameplate 3" x 8"
Optional Features Include:
Manual-Reset of Overload Relay
Position Indicator for Contactor
Ground Fault Relay
Multi-function Protective Relay
Extra Auxiliary Contacts
Time‑Delay Reclosing Relay
Start & Stop Control Switches
Hand‑Off Auto Selector Switch
A C Ammeter Transfer Switch
Mechanically "Latched" Contactor
Foreign Voltage Switch
A C Voltmeter
Indicating Lights
SPACE PLANNING
SPACE REQUIRED Each
controller is 34‑in. wide by 20‑in. deep, 90‑in. high overall when mounted
on support-frame 6-in. deep. When grouped, the controllers are mounted
side‑by‑side and/or back-to-back with interconnecting bus. Suggested
minimum working clearance in front of each controller is 4‑ft.
CONDUIT ENTRANCES Conduit entrances for the incoming-line, will
be provided in an attached box for overhead or underground conduit. Conduit
entrances for load and control, are standard in the bottom and (optionally)
available in the top.
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