Argus RST 48/30 User manual

RST 48/30
Switched Mode Rectifier/Eliminator
010-006-B0

Argus Technologies Ltd. Visit www.argus.ca
Burnaby, British Columbia. Telephone: [phone] Fax: [phone]
Argus Technologies reserves the right to make changes to the products and information contained in this document without notice.
Copyright 2008 Argus Technologies Ltd. Argus®is a registered trademark of Argus Technologies Ltd. All Rights Reserved.
Printed in Canada.
This page intentionally left blank.

RST 48/30 SWITCHED MODE
RECTIFIER/ELIMINATOR
#010-006-B0
SERIAL # ____________
The following documents and drawings are included in this manual to provide the necessary information required
for routine operation and fault diagnosis of the unit:
• Specifications RST 48/30: 010-006-B1 Rev B
• Warranty Policy: 048-507-10
• Installation and Operation Instructions: 010-002-C0 Rev H
• Main Parts List: 010-006-20
• Recommended Spare Parts List: 010-006-G0
• Main Schematic: 010-006-05
• Outline Drawing: 010-006-06
• Power Circuit Parts List: 700-015-20
• Power Circuit Schematic: 700-015-05 (Page 1)
• Front Panel Circuit Parts List: 700-075-20
• Front Panel Schematic: 700-075-05
• Factory Service Information: 048-527-10
Printed in Canada. Copyright © 1988 Argus Technologies Ltd. ARGUS is a registered trademark of Argus Technologies Ltd. All Rights Reserved.
ARGUS TECHNOLOGIES 010-006-B0 Rev A

SPECIFICATIONS FOR ARGUS TECHNOLOGIES’ SWITCHED MODE RECTIFIER MODEL RST 48/30
Output
Voltage: 42 to 62VDC (test)
50 to 60VDC (equalize)
48 to 57VDC (float)
Current: 30 Amps DC nominal
Power: 1698 Watts continuous
Regulation: +/-.02% Line and load (static)
1% deviation for 50 to 100% load step (dynamic)
Time Stability: .1% per year
Temp. Stability: 100ppm/degree C over the operating range
Response Time: 1ms to .1% of output for 50 to 100% load step
Noise: Less than 22dBrnc (Voice Band)
10mV rms to 10MHz (Wide Band)
EMI: The unit meets requirements of FCC Rules Part 15 Subpart J
Level A. The unit also meets Bell Canada’s design standard
DS-8465 (Electromagnetic Interference/Compatibility Requirements
and Test Methods for Telecommunications Systems and Equipment)
Section 4. as per Test Methods detailed in Section 6.
Breaker Rating: 60 Amp; 5,000 Amp interrupting capacity at 65VDC
In Accordance with FCC requirements, we provide the following statement as specified in the FCC guidelines for
conformance to Part 15 Subpart J, Level A:
WARNING: This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction
manual, may cause interference to radio communications. It has been
tested and found to comply with the limits for a Class A computing
device pursuant to Subpart J of Part 15 of FCC Rules, which are
designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation of this
equipment in a residential area is likely to cause interference in which
case the user at his own expense will be required to take whatever
measures may be required to correct the interference.:WARNING
ARGUS TECHNOLOGIES 010-006-B1 Rev B Page 1 of 2

SPECIFICATIONS FOR ARGUS TECHNOLOGIES’ SWITCHED MODE RECTIFIER MODEL RST 48/30
Input
Voltage: 92 to 132VAC (57-63 Hz)
184 to 264VAC (47-63 Hz)
Current: 10.2 Amps (240VAC nominal) @ 1698 Watts
20.4 Amps (120VAC nominal) @ 1698 Watts
Power Factor: .90 Lagging 0-100% load
T.I.F.: Less than 120 at 100% load (current)
Efficiency: 88% min. 40-100% load
Hold-over Time: 30ms from loss of 240VAC line
Source Impedance: 5% inductive or resistive
Soft Start: 33% per second
Start Delay: 0-90 sec. (10 second increments)
Recommended Feeder Breaker: 30 Amps or greater (120VAC)
15 Amps or greater (240VAC)
Breaker Rating: 30 Amp; 10,000 Amp interrupting capacity at 250VAC (120VAC)
15 Amp; 10,000 Amp interrupting capacity at 250VAC (240VAC)
Miscellaneous
Acoustic Noise: 45dBa at three feet
Weight: 40 lbs (18.2 kg)
Size: 7.00”H x 17”W x 15” (17.7cm H x 43.2cm W x 38.1cm D)
Recommended Connection Wire Sizes (as per UL)
Ambient Temp=30 deg C Input: #12 AWG
Output: #10 AWG
Ambient Temp=50 deg C Input: #10 AWG
Output: #8 AWG
Environmental
Temperature: 0 to 50 deg. C [operating](32 to 122 deg. F)
40 to +70 deg. C [storage](-40 to +158 deg. F)
Humidity: 0 to 90% non-condensing
Elevation: -500 to +2800m above sea level
(derate max. ambient to +40 linearly at 3100m)
ARGUS TECHNOLOGIES 010-006-B1 Rev B Page 2 of 2

MANUAL ADDENDUM
MANUAL ADDENDUM
FORM 954-010-10 - Add2.doc 2/5/98
P.1
Unit Description:
Applies to Manual P/N and Rev:
RSTs 010-016-B0 Rev A SDs 018-007-B0 Rev D
010-019-B0 Rev A 018-008-B0 Rev C
010-020-B0 Rev A 018-011-B0 Rev C
010-007-B0 Rev A 018-016-B0 Rev C
010-013-B0 Rev B
010-015-B0 Rev A RCS 030-527-B2 Rev P/A
010-006-B0 Rev A
010-002-B0 Rev B
010-023-B0 Rev A
010-008-B0 and B2 Rev A
RSMs 010-510-B2 Rev C 010-030-B2 Rev B
010-525-B2 Rev P/A 010-505-B2 Rev C
010-511-B2 Rev P/A 010-024-B2 Rev C
010-528-B2 Rev A 010-036-B2 Rev C
010-529-B2 Rev A 010-028-B2 Rev B
010-522-B2 Rev B 010-034-B2 Rev B
010-512-B2 Rev A 010-037-B2 Rev A
010-503-B2 Rev A 010-035-B2 Rev A
010-510-B2 Rev B 010-038-B2 Rev A
010-029-B2 Rev B 010-039-B2 Rev A
NOTE: THIS ADDENDUM SHEET IS TO BE INSERTED IN ALL OF THE ABOVE LISTED
PRODUCT MANUALS. THIS ADDENDUM REPLACES THE ADDENDUM
“ADDNEW.DOC” INCLUDED WITH DOCUMENT 022-000-C1.
EXPLANATION:
The market shift from vented or “wet cell” to valve regulated lead acid (VLRA) batteries has prompted Argus to
update its factory default settings to accomodate the requirements of these batteries.
The changes listed below are being implemented immediately as new factory default settings in all Argus power
products. However, as always, customer requested settings will take precedent over factory defaults.
This addendum is to accompany all new Argus user manuals. Questions about the new factory default settings
should be directed to our toll free 1-888-GO ARGUS Technical Support line.
TABLE 1-1: RSM/RST/RCS SYSTEMS (excluding RSM 48/7.5 and 24/15)
Function 12 volt systems (nom) 24 volt systems (nom) 48 volt systems (nom)
Float 13.5 27 54
Equalize 13.8 27.5 55
OVP 14.5 29 57
LVA 11 22 44
HVA 14 28 55.5
TABLE 1-2: RSM 48/7.5 and 24/15 (module) @ 25°C (77°F)

MANUAL ADDENDUM
MANUAL ADDENDUM
FORM 954-010-10 - Add2.doc 2/5/98
P.2
Function 24 volt systems (nom) 48 volt systems (nom)
Float 27 54
TABLE 1-3: RSM 48/7.5 and 24/15 SUPERVISORY/CONTROL MODULE
Function 24 volt systems (nom) 48 volt systems (nom)
LVD 21 42
TABLE 1-4: SUPERVISORY/CONTROL SYSTEMS (SD-02,03,04,05)
Function 12 volt systems (nom) 24 volt systems (nom) 48 volt systems (nom)
Load Out 10.5 21 42
Load In 12.5 25 50
LVA 12 24 48
HVA 14 28 55.5
HVSD n/a 29.5 58
NOTE: THIS ADDENDUM SHEET IS TO BE INSERTED IN ALL OF THE ABOVE LISTED
PRODUCT MANUALS. THIS ADDENDUM REPLACES THE ADDENDUM “ADDNEW.DOC”
INCLUDED WITH DOCUMENT 022-000-C1.

IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important safety and operating instructions for battery charger
models RST 48/50, 48/30, 24/50, 24/100, 12/50 & 12/100.
1. Before using battery charger, read all instructions and cautionary markings on (1) battery
charger, (2) battery, and (3) product using battery.
2. CAUTION - To reduce risk of injury, charge only lead-acid type rechargeable batteries.
Other types of batteries may burst causing personal injury and damage.
3. Do not expose charger to rain or snow.
4. Use of an attachment not recommended or sold by the battery charger manufacturer may re-
sult in a risk of fire, electric shock, or injury to persons.
5. Do not operate charger if it has received a sharp blow, been dropped, or otherwise damaged in
any way; take it to a qualified service center.
6. Do not disassemble charger; take it to a qualified service center when service or repair is re-
quired. Incorrect reassembly may result in a risk of electrical shock or fire.

INSTALLATION AND OPERATOR’S MANUAL FOR RST SERIES OF SWITCHED MODE RECTIFIERS
Table of Contents
Section Topic Page
1.0 Warranty
2.0 Documentation & Part Numbers ...................................... 1
2.1 Introduction .............................................. 1
2.2 ARGUS numbering system ................................... 1
3.0 General ....................................................... 2
3.1 Scope .................................................. 2
3.2 Introduction .............................................. 2
3.3 Features ................................................ 2
4.0 Installation Instructions............................................. 7
4.1 Tools Required............................................ 7
4.2 Inspection ............................................... 7
4.3 Preparation/Mounting ....................................... 7
4.4 Input Connections.......................................... 8
4.5 Output Connections ........................................10
4.6 Initial Start-up.............................................12
5.0 Operating Instructions .............................................15
5.1 Shut-down ...............................................15
5.2 Start-up ................................................15
5.3 Normal mode .............................................15
5.4 Float/equalize/test..........................................15
5.5 Fuse replacement..........................................15
6.0 Adjustments ....................................................16
6.1 Factory Settings/Ranges .....................................16
6.2 Current Limit .............................................16
6.3 Float Voltage .............................................17
6.4 Equalize Voltage ..........................................17
6.5 Test Voltage..............................................17
6.6 Output Slope/Parallel Operation................................18
6.7 Start Delay...............................................19
6.8 Over Voltage Protection .....................................19
6.9 Under Voltage Alarm .......................................19
7.0 Theory of operation ...............................................21
7.1 Power Circuit .............................................21
7.2 Control Circuit ............................................21
8.0 Schematics/Parts Lists.............................................29
9.0 Trouble shooting and Repair ........................................30
9.1 Diagnostic chart ..........................................30
10.0 Moving and Storage ..............................................34

Warranty Policy
Argus Technologies Ltd. warrants all equipment manufactured by it to be free from defects in parts
and labor, excluding third party OEM materials (example: air conditioners, batteries), for a period of
two years from the date of shipment from the factory. For third party products the OEM’s warranty
shall apply. The liability of Argus applies solely to repairing, replacing or issuing credit (at Argus’ sole
discretion) for any equipment manufactured by it and returned by the customer during the warranty
period. The terms of the warranty are Ex Works (EXW) from Argus’ factory service location.
Argus reserves the right to void the warranty if:
(1) identification marks or serial numbers are removed or altered in any way,
(2) invoice is unpaid, or
(3) defect is the result of misuse, neglect, improper installation, environmental
conditions, non-authorized repair, alteration or accident.
Argus shall not be liable to the customer or other parties for any loss of profits, loss of use, costs for
removal or installation of defective equipment, damages or consequential damages based upon
equipment failure during or after the warranty period. There shall be no other obligations either
expressed or implied. Argus will not honor warranties for batteries and other third party products
without prior written Argus authorization.
Freight Policy
Customer is responsible for all shipping and handling charges (COD and freight collect will not be
accepted without prior approval from Argus Technologies).
Terms of Payment (North America)
Payment terms are net 30 days subject to prior credit approval. All other orders require payment
before shipping.
Terms of Payment (International)
Payment terms are subject to prior approval and are typically through Tele-Transfer.
Return Material Policy
Our RMA policy is designed to ensure prompt, efficient and high quality factory service. A Return
Material Authorization (RMA) number must be obtained before products can be accepted for
servicing by the Argus factory. For returns to an authorized service center (refer to “Authorized
Service Centers” for locations), please consult the individual service center for specific return policies
and instructions.
To obtain a RMA number for a factory return, customers must call the appropriate location with the
product serial and model number, as well as a brief description of the problem, shipment instructions
and billing details.
The original packing container should be used whenever possible. Both the shipping documents
and the outside of the box must have the RMA # clearly marked and the product shipped prepaid to
the Argus factory service center. Argus will endeavor to repair products within five working days of
receipt. Repairs to the returned product are warranted for a period of six months. A service charge
may be applied if no fault is found in the returned product. Argus will not accept products without an
RMA number.
Business Hours
Argus North American office hours are 7:30 am to 5:00 pm (Pacific Standard Time) Monday to Friday.
WARRANTY AND REPAIR INFORMATION
Canada and USA toll free 24 hour emergency technical support: +1 888 GO ARGUS (462 7487) Outside North America: [phone]
Factory Service Centers
Canada and International
Argus Technologies Ltd.
ATTN: RMA Returns
7033 Antrim Avenue
Burnaby, BC, V5J 4M5 Canada
Tel: [phone]
Fax: [phone]
Email: [e-mail]
USA
Argus Technologies Inc.
ATTN: RMA Returns
3116 Mercer Avenue
Bellingham, WA, 98225 USA
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Asia-Pacific
PCM Electronics (Dong Guan) Co., Ltd.
Hongli Industrial Area, Miaobian, Liaobu Town,
Dongguan City, Guangdong Province,
523400 China
Tel: [phone]
Fax: [phone]
Authorized Service Center
Argentina
Argus Technologies de Argentina
Belen 315, Capital Federal, Buenos Aires,
1407l Argentina
Tel: [phone]
Fax: [phone]
Cell: [phone]
Email: [email protected]
Asia
Argus Technologies Asia Pte Ltd
Blk 6 Tagore Lane #160
Singapore 787570
Tel: [phone]
Fax: [phone]
Australia
CPS National
8/376 Newbridge Rd
Moorebank, NSW, 2170 Australia
Tel: [phone]
Fax: [phone]
Australia/New Zealand
Alpha Power Systems Pty Ltd
Unit 3, 30 Heathcote Road
Moorebank, NSW, 2170 Australia
Tel: [phone]
Fax: [phone]
Century Yuasa
37 - 65 Colbalt Street
Carole Park QLD 4300
Australian Sales & Service
Tel: [phone]
Fax: [phone]
New Zealand Sales & Service
Tel: [phone]
Fax: [phone]
Canada
Compower Systems Inc.
118 Tiffield Road
Toronto, ON, M1V 5N2 Canada
Tel: [phone]
Fax: [phone]
Europe
Alpha Technologies Europe Ltd.
Cartel Business Estate
Edinburgh Way
Harlow, Essex, CM20 2DU UK
Tel: [phone]
Fax: [phone]
Mexico & Central America
Technologies Argus First De Mexico SA de CV
Anatole France No. 17
Col. Polanco
Mexico City, 11560 Mexico
Tel: [phone]
Fax: [phone]
South America
Argus Technologies Argentina
Santo Tome 2573, Capital Federal
Buenos Aires, 1416 Argentina
Tel: [phone]
Cell: [phone]
E-pager: [email protected]
Turkey
IPC Enerji Elk San ve TIC AS
Inonu cad. Kanarya sok. No:20
Yenisahra - Kadikoy
Istanbul, Turkey
Tel: [phone]
Fax: [phone]
048-507-10-I1 Rev S (09/2007)

2.0 Documentation - Part Number Information
2.1 Introduction
Please read this manual thoroughly prior to equipment use in order to become familiar with the
unit’s numerous features and operating procedures. To obtain a maximum degree of safety, follow
the prescribed sequences as outlined.
This manual incorporates warnings and notes to the user. Points that are vital to the proper opera-
tion or safety of the operator are indicated by the heading: WARNING. Points that are important to
the performance or ease of use of the equipment are covered by a notation that is underlined.
2.2 ARGUS Numbering System
ARGUS technologies uses a eight digit drawing number system which is broken into three blocks.
The first three digits describe the category of the product; e.g. rectifier or fuse panel. The next three
digits indicate the sequence in which the product number was allocated in a particular category.
The last two digits indicate the type of drawing; i.e.:
05 - Schematic
06 - Outline Drawing
20 - Bill of Material
ARGUS Technologies uses a eight digit part numbering system for all components and
sub-assemblies. Each part has its unique number. Due to the quantity, numbering categories are
not listed in this manual.
ARGUS TECHNOLOGIES Document #010-002-C0 Rev. H Page 1

3.0 General
3.1 Scope
This instruction manual covers the installation, operation and troubleshooting of the Argus RST se-
ries of switched mode rectifier/battery eliminator.
3.2 Introduction
The RST series of rectifiers employs a high frequency switched mode conversion technique that
provides a fully regulated and isolated DC output from the AC mains. The 48 volt rectifiers are in-
tended to be used in a positive ground configuration, however 24 volt units can be ordered in either
positive or negative ground configuration. The units are fully functional battery eliminators and
therefore do not require an external battery to meet the performance requirements as outlined in the
specification section of this manual.
3.3 Features
3.3.01 .......Digital Voltmeter/Ammeter
3.3.02 .......Indicators
3.3.03 .......Power On Indicator
3.3.04 .......Float Mode
3.3.05 .......Equalize Mode
3.3.06 .......Test Mode
3.3.07 .......Alarms - General
3.3.08 .......Rectifier Fail Alarm
3.3.09 .......LowVoltage Alarm
3.3.10 .......Current Limit
3.3.11 .......Over Voltage Shutdown
3.3.12 .......Remote Equalize
3.3.13 .......Remote Shutdown
3.3.14 .......Remote Restart
3.3.15 .......Start Delay
3.3.16 .......Soft Start
3.3.17 .......Output Slope
3.3.18 .......Input/Output Circuit Breakers
3.3.19 .......ACHi/Lo voltage Shutdown
3.3.20 .......Front to Back Ventilation
3.3.21 .......Over Temperature Protection
3.3.22 .......Battery Eliminator Operation
3.3.23 .......Remote Sense
3.3.01 Digital Voltmeter/Ammeter
Located on the front panel of the unit is a 3 digit (3 1/2 for 100 amp units) LED display. Normally,
the display indicates the output current of the rectifier. The display is updated every third of a sec-
ond to eliminate annoying display jitter yet provides a fast response for rapidly changing output con-
ditions. Located underneath the display is a push button labelled “Depress to display Volts”. When
this button is held down the display will indicate the output voltage of the unit. Output current read-
ings are accurate to within 2% while voltage measurements are accurate to within 0.2%. Sensing
for the meter is before the output breaker of the unit. Therefore only the true output of the rectifier is
displayed.
Document #010-002-C0 Rev. H Page 2 ARGUS TECHNOLOGIES

3.3.02 Indicators
The indicators provide visual indication of operational status and alarms. The indicators and associ-
ated colors are:
Power On .............Green
Float Mode ............Green
Equalize Mode .........Yellow
Test Mode ............Red
Rectifier Fail ...........Red
Under Voltage Alarm .....Red
Current Limit ..........Yellow
OVP Trip .............Red
3.3.03 Power On Indicator
When AC power is present and the AC input circuit breaker placed in the “on” position the indicator
will light. The indicator will not illuminate if the AC input is removed.
3.3.04 Float Mode
Normal operation of the rectifier is in the “Float” mode which the rectifier will default to when AC
power is supplied to the unit. When in the “Float” mode the output voltage of the rectifier is deter-
mined by the “Float” mode adjustment control setting. The “Float” mode control button manually re-
turns the unit to the “Float” mode from a locally initiated “Equalize” or “Test” mode and is indicated
by illumination of the “Float” indicator.
3.3.05 Equalize Mode
When the unit is required to equalize a battery string, the “Equalize” mode is generally used and is
indicated by illumination of the “Equalize” indicator. This mode can be entered manually via the
front panel control or by an external signal supplied via the external “Equalize” input. When in the
“Equalize” mode the output voltage is set by the “Equalize” voltage control adjustment.
3.3.06 Test Mode
Selection of the “Test” mode is via the mode switch on the front panel and is indicated by illumina-
tion of the “Test” indicator. The output breaker must be in the open position before this mode can
be selected. Once in the “Test” mode the output circuit breaker can be closed and the unit operated
under control of the “Test” adjustment potentiometer. When in the “Test” mode the unit’s alarm lev-
els can be set with the output breaker open without disturbing a system which is powered by a bat-
tery or other rectifiers operating in parallel. The output voltage of the unit is set by the “Test” adjust-
ment potentiometer. This feature is useful for operating the unit while it is isolated from other units
in a multi-rectifier system or from the battery.
3.3.07 Alarms
The unit’s three alarms, Rectifier Fail, Low Voltage, and Current Limit are extended via “form C”
contacts for remote monitoring. Visual indication of the alarms is active during all modes of opera-
tion. Rectifier fail alarm discrimination circuitry is factory set. However, the Under voltage alarm is
user adjustable. All alarms are “real time” and therefore do not latch. The Rectifier Fail and Low
Voltage alarm contacts are “fail safe” and therefore will signal an alarm without DC present (i.e. a
battery), however, the indicators will not remain illuminated unless there is DC power available (i.e.
a battery or a second operational unit in parallel).
ARGUS TECHNOLOGIES Document #010-002-C0 Rev. H Page 3

3.3.08 Rectifier Fail Alarm
The RST series of rectifiers have a “true” rectifier fail alarm. This alarm provides a true indication of
the rectifier’s ability to source current. When the rectifier’s current output drops below five percent of
the rated output, the rectifier fail detection circuit is activated. The circuit momentarily ramps up the
output voltage by 5% to determine if the rectifier will source current. If no increase in current is de-
tected within ten seconds, the alarm indicator will illuminate and the associated relay will energize.
The rectifier will continually test for the condition until current is detected. The output voltage
ramping is terminated upon detection of current.
3.3.09 Low Voltage Alarm
When the output of the rectifier drops to the level set by the low volts alarm adjustment potentiome-
ter, the alarm indicator will illuminate and the associated relay will de-energize. When the output
level is raised above the alarm level, the alarm and indicator will extinguish.
3.3.10 Current Limit
The current limit circuit of the RST rectifier provides a primary response to output overcurrent situa-
tions by limiting current rather than tripping the output breaker. The level at which the current limit
engages is set by the current limit adjust potentiometer on the front panel. When the output current
reaches the preset level the output voltage will decrease and limit the output current of the unit. The
current limit LED on the front panel will also illuminate in conjuction with the closure of the current
limit relay contacts.
3.3.11 Over Voltage Shutdown
The over voltage protection feature electronically shuts down the the rectifier when a high voltage
condition on the output of the rectifier is identified. This is indicated by a front panel LED. The level
of the high voltage shutdown condition is set by the over voltage control on the front panel. This
feature provides protection to the load from a over voltage condition from the power source. The
over voltage shutdown feature of the RST is selective and operates at 5% higher voltage in a no
load condition. This provides the ability to isolate and shutdown a malfunctioning unit amongst a
group of units operating in parallel.
3.3.12 Remote Equalize
When the external positive or negative polarity (with respect to the remote common termination) DC
signal is applied to the remote “Equalize” input, the unit will enter the “Equalize” mode. The re-
sponse to the external signal will be the same as if the front panel “Equalize” mode selection button
was depressed. Upon removal of this signal the rectifier will automatically go into “Float” mode,
even though it may have been in “Test” mode prior to signal application.
3.3.13 Remote Shutdown
When a signal is applied, the unit “electronically” shuts down (breakers are not tripped). To the ob-
server the units appears as if the output breaker was turned off. All the appropriate trouble alarms
are signaled, such as rectifier fail. Removal of the signal will return the rectifier to the condition prior
to signal application. The feature requires the same type of input that is used for remote “Equalize”.
Document #010-002-C0 Rev. H Page 4 ARGUS TECHNOLOGIES

3.3.14 Remote Restart
After over voltage shutdown this feature can be used to attempt a restart of the rectifier. Upon re-
start, the rectifier will reset the high voltage shutdown control. If the condition has cleared, the recti-
fier will resume normal operation. If the condition is still present then the unit will shutdown again
and await a restart signal. Since the restart function is edge sensitive to the control signal, the unit
will not continually attempt to restart. Remote restart requires the same type of input that is used for
remote “Equalize”.
3.3.15 Start Delay
The units are equipped with a delay timer in order to prevent excessive loading of the remote site
standby generators upon start up. The timer delays the AC start of the rectifier depending on the
setting of the start delay selector on the front panel. Delay times from 0 - 90 seconds (in 10 second
increments) are available. The timer will be enabled if any setting besides zero is selected. How-
ever, even in the zero delay position a one second delay is introduced to allow for charging of the
unit’s capacitors prior to initiation of the soft start. Delay will be initiated upon application of AC. At
the end of the delay period the soft start is initiated and the rectifier goes into “Float” mode.
3.3.16 Soft Start
To eliminate an instantaneous demand on the AC supply upon application of AC power, the units
employ a soft start feature sometimes referred to as a “Current Walk-in”. The output of the rectifier
is gradually ramped up from zero amps to the load requirement (100% max). This ramping (33%
per second) is accomplished by current limiting the output.
3.3.17 Output Slope
RST rectifiers use “output slope” also known as “regulation offset” to accomplish load sharing.
When the rectifiers are run in parallel the units must be adjusted to track to each other or share the
load over the output current range. Output slope adjustment alters the regulation curve of the recti-
fier (0.0% preset factory setting).
3.3.18 Input/Output Circuit Breakers
Every unit is equipped with a thermal-magnetic circuit breaker on the input and magnetic breakers
on the output. Excessive current passing through a breaker will result in the breaker releasing to the
tripped (reset) position. The breakers must be manually reset to turn the unit back on. Both break-
ers allow the operator to isolate the unit from either the input or output.
3.3.19 AC Low Voltage Shutdown
The unit is electronically protected from low voltage to the input by fault detection circuitry. If the in-
put to the rectifier falls below the lower AC input limit (see specifications), the unit will shutdown.
The unit will resume normal operation immediately upon restoration of normal line conditions.
3.3.20 Front to Back Ventilation
Cooling of the unit is achieved via front to back convection cooling. Cool air is drawn in via the grill
in the front of the unit. The majority of the airflow is directed towards the rear of the unit and over
the heat sinks. The heatsinks are enclosed in a heat chimney which creates a even draw of cool air
over the fins and out the top rear of the unit. Some of the air flow is drawn over and up through
openings in the main power circuit board, into transformers and around filter capacitors. This sec-
ondary airflow exits via the ventilation holes in the top sides of the unit.
ARGUS TECHNOLOGIES Document #010-002-C0 Rev. H Page 5

3.3.21 Over Temperature Protection
The unit is protected in the event that it is operated in an excessive ambient environment or if the
cooling air flow is compromised. Under these conditions the unit’s output current capability will be
reduced to keep the temperature of the power semiconductors within limits. Normal capacity will be
returned automatically if the ambient temperature is reduced or the restriction of the airflow is re-
moved.
3.3.22 Battery Eliminator Operation
The unit maintains all specifications with or without a battery attached to the output. However if a
battery or another unit operating in parallel is not present the alarms will not be illuminated if the AC
power is removed.
3.3.23 Remote Sensing
The rectifier will regulate to a remote point when remote sense leads are connected to the “remote
sense” input. If the remote sense leads are not attached the unit will automatically revert to internal
sensing. The internal sense point is at the output terminals.
Document #010-002-C0 Rev. H Page 6 ARGUS TECHNOLOGIES

4.0 Installation Instructions
4.1 Tools Required
Philips screw driver (Tip Size 3/16")
Philips screw driver (Tip Size 1/4")
Slotted screw driver (Blade size 1/4")
Slotted screw driver (Blade size 1/8")
Slotted screw driver (Blade size .09" x .02") or tweaker
4 1/2 Digit Digital Voltmeter
Adjustable resistive load 24/48 volts
4.2 Inspection
All Argus products are shipped in rugged, double walled boxes and are “foamed in place” to mini-
mize shock that may occur during transporting. Packaging assemblies and methods are tested to
National Safe Transit Association standards.
Prior to uncrating, note any damage to the shipping container. Uncrate the rectifier and inspect the
exterior. If any damage is observed, contact the carrier immediately.
Open the front panel of the unit and continue the inspection for any internal damage. In the unlikely
event of internal damage do not operate the unit until Argus Technologies has been contacted for
advice on the impact of any damage.
4.3 Preparation/Mounting
The unit has been designed for mounting in a 19" or 23" EIA standard relay rack. Mounting brack-
ets are universal for 1" or 1 3/4" spacing plus reversible for 19" or 23“ mounting configurations. Indi-
vidual units shipped from the factory are arranged for the 19" mounting configuration. To adapt to
23" mounting, remove the four attaching screws, then flip the brackets so that the large flange is
against the rectifier chassis, then re-attach with mounting screws. The brackets may also be relo-
cated for flush mounting of the unit in a rack. To flush mount the unit, the 19" or 23" orientation
should first be selected then the brackets should be moved to the front mounting position from the
mid mounting (factory) arrangement.
As indicated by the front panel labelling, the unit must be mounted in a clean and dry environment.
Sufficient access to an uninterrupted air source must be provided in front of the unit. Allow at least
two inches of free space behind the unit if two units are stacked directly on top of each other or
three inches if three units are stacked directly on top of each other for ease of access and airflow.
When installed in a relay rack, one extra rack space can be left between units to provide additional
airflow, thereby reducing stress on the unit. If a free space is provided above a unit, space behind
the unit is not required.
The unit should be mounted to the rack using four #12 -24 x 1/2" screws in each bracket. A captive
type of drive such as Philips head is preferred to eliminate the possibility of slippage and scratching
of the unit’s exterior.
ARGUS TECHNOLOGIES Document #010-002-C0 Rev. H Page 7

4.4 Input Connections
4.4.0 Grounding Instructions
This rectifier should be connected to a grounded, metal, permanent wiring system; as an equipment
grounding conductor should be run with circuit conductors and connected to equipment grounding
terminal of the rectifier. Connections to the rectifier should comply with all local codes and ordi-
nances.
4.4.1 Feeder protection/sizing
Each unit should be connected to a dedicated feeder breaker. The units should be connected to
220 Volt or 240 Volt three phase NEC systems (or 120 VAC if equipped - see note below) accord-
ing to the National Electrical Code and all local ordinances. The units should be either permanently
connected according to the National Electrical Code or connected with less than 6 ft of type SJT,
ST, SJO, or SO flexible cord with proper size metal strain relief clamp and appropriately rated UL
approved attachment plug.
120VAC Units: If the unit is used in a multi-unit configuration we recommend that the
208/240 volt (Delta) operation option be used. Optimum power factor will be maintained with
a a 208/240 VAC source. Use of a WYE derived 120 VAC source can result in higher neutral
currents due to the lack of the inherent cancellation effect of third harmonic currents of a
Delta connection. Note that a higher capacity service breaker is required for the unit if the
120 volt source is used - check the specifications for the recommended service breaker rat-
ing.
The minimum size of feeder breaker and wire size is given in the specifications. If larger than mini-
mum feeder breaker is used appropriately higher capacity wire size as required according to the
National Electrical Code.
WARNING: The feeder breaker must be in the “off” position before at-
tempting to install the rectifier.
4.4.2 AC Connections
Confirm the operating voltage before proceeding.
WARNING: Ensure that the input and output breakers are in the “off”
position prior to any work being performed on the AC or DC connec-
tions.
AC input wires should be tightly bundled and routed as far away as possible from the power PCB to
minimize EMI pickup on the AC feed wires.
4.4.2.1
Input wires can be routed through the rear or front access holes located on the side of the unit. The
cable clamp plate is for 1/2" conduit or a cable clamp. Select the cable clamp plate shipped at-
tached to the rear access hole, swap with the blank if front access is desired.
4.4.2.2
Insert the AC cable through the cable clamp as per figure #1a. Note the length of cable to be used
as indicated in the table.
Document #010-002-C0 Rev. H Page 8 ARGUS TECHNOLOGIES

Drop down the front panel and pull the AC cable assembly through the selected hole for the input.
Secure and route the cable as per Figure #2.
Insert the ground conductor into the chassis ground lug which is located at the front of the unit.
Tighten the lug’s cable hold down screw. Route the remaining input leads to the top of the AC input
breaker assembly. To provide enough free play in the terminal assembly, the lug screws should be
backed out approximately 5 turns. Insert the wire ends behind the lug body of the breaker’s termi-
nals. Tighten the terminal screws.
4.4.2.3
Re-attach cable clamp plate to the rectifier chassis using the two Philips head screws.
4.4.2.4 120/240 VAC Conversion (RST 48/30 and 24/50 only)
WARNING: A.C. power must be removed from the unit before attempt-
ing to convert the operating voltage. If the unit has been in operation,
wait 5 minutes before opening the front panel.
WARNING: D.C. power may be present across the output terminals
from a connected battery or parallel unit even if the output breaker is
open.
The input range of the RST 48/30 or RST 24/50 series rectifiers can be changed from 120 volts to
208/240 volts, or vice-versa, without dismantling or removing the unit from the rack. Prior to conver-
sion ensure that the feeder protection breaker and gauge of wire are adequate for the new operat-
ing current. In order to affect this change it is necessary to change the jumpers on two terminal
blocks.
ARGUS TECHNOLOGIES Document #010-002-C0 Rev. H Page 9
Figure 1a - Input Cable Assembly

Remove the jumpers from the main input voltage selector ternimnal block (located beside the input
circuit breaker) and the auxiliary power block (TB2, located on front edge of the power printed cir-
cuit board). Reinstall the jumpers for the new voltage as follows:
Voltage Main Block Auxiliary Block
120V 1-2 1-2
3-4 3-4
5-6
240V 2-3 2-3
4-5
If jumpers have to be fabricated, use #10 AWG for the main terminal block and #20 AWG for the
auxiliary block. The unit voltage configuration change is now complete.
4.5 Output Connections
WARNING: Ensure output breaker is “off” before attempting work on
the output cable assembly. When the unit is connected to batteries,
another operating rectifier or a grounded load, the output leads must
be suitably taped to prevent contact with the unit or each other. Dis-
connect the battery externally if possible.
4.5.1
Users of this equipment should be aware of the short circuit current capacity of the connected bat-
tery system in relation to the interrupting capacity of the output breaker. In applications where the
battery system short circuit current may exceed the breaker’s interrupting capacity, the battery ca-
bles should be protected by a high interrupting capacity fuse or breaker. The current limiting capac-
ity of the battery system can be aided by selecting the minimal wire size without compromising the
maximum loop voltage drop.
DC output wire must be UL approved File # B64801, XHHW or RHH/RHW (Canadian users; RW90
Type). See specifications for recommended wire gauge. Control and sense wires must be UL ap-
proved Style 1015 (Canadian users; TEW type). Select either rear or front entry of the cables and
swap the blank plate with the holed plate if necessary. For ease of cable manipulation, the cable
clamp plate should not be mounted until the end of this sequence. Feed the cable assembly
through the hole in the plate. The output cables, sense, control and alarm wires should be bundled
together. If the remote sense leads are not attached the unit will automaticlly revert to internal sens-
ing. The internal sense point is at the output terminals. The sense leads should be twisted prior to
inclusion in the bundle. The cable assembly should be as per figure # 1b.
Wires should be tightly bundled and routed as far away as possible from the power PCB to mini-
mize EMI pickup.
4.5.2
WARNING: Observe the correct polarity of output cable and sense
lines connections when terminating.
Feed the cable through the selected output hole and route cable as per figure #2. Crimp on the ap-
propriate lugs to the two output lugs. Secure the output cables to the output post of the same polar-
ity. Install the supplied local alarm common wire to the approriate output terminal if a remote alarm
Document #010-002-C0 Rev. H Page 10 ARGUS TECHNOLOGIES