ABB REL 352 User manual

ABB Network Partner
Power Automation and Protection Division
4300 Coral Ridge Drive
Coral Springs, Florida 33065
October 1996 Instruction Manual
40-201.9
NUMERICAL PHASE COMPARISON
TRANSMISSION LINE PROTECTION SYSTEM
REL 352
Version 1.00

Power Automation and Protection Division i REL 352 Version 1.00
It is recommended that the user of REL 352 equipment become acquainted with the information in this instruc-
tion leaflet before energizing the system. Failure to do so may result in injury to personnel or damage to the
equipment, and may affect the equipment warranty. If the REL 352 relay system is mounted in a cabinet, the
cabinet must be bolted to the floor, or otherwise secured before REL 352 installation, to prevent the system from
tipping over.
All integrated circuits used on the modules are sensitive to and can be damaged by the discharge of static elec-
tricity. Electrostatic discharge precautions should be observed when handling modules or individual
components.
ABB does not assume liability arising out of the application or use of any product or circuit described herein.
ABB reserves the right to make changes to any products herein to improve reliability, function or design. Spec-
ifications and information herein are subject to change without notice. All possible contingencies which may
arise during installation, operation, or maintenance, and all details and variations of this equipment do not pur-
port to be covered by these instructions. If further information is desired by purchaser regarding a particular in-
stallation, operation or maintenance of equipment, the local ABB representative should be contacted.
© Copyright
ABB Power T&D Company Inc.
Published 1996
All Rights reserved
ABB does not convey any license under its patent rights nor the rights of others.
!ATTENTION
Trademarks
All terms mentioned in this book that are known to be trademarks or service marks are listed below. In addition,
terms suspected of being trademarks or service marks have been appropriately capitalized. ABB Power T&D Com-
pany Inc. cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as
affecting the validity of any trademark or service mark.
IBM and PC are registered trademarks of the International Business Machines Corporation.
WRELCOM is the registered trademark of the ABB Power T&D Company Inc.
INCOM is the registered trademark of the Westinghouse Electric Corporation

REL 352 Version 1.00 ii Power Automation and Protection Division
Equipment Identification
The REL 352 equipment is identified by the Catalog Number on the REL 352 chassis nameplate. The Catalog
Number can be decoded by using Catalog Number ( see Section 3, pg. 3-26 ).
Production Changes
When engineering and production changes are made to the REL 352 equipment, a revision notation (Sub #) is
reflected on the appropriate schematic diagram, and associated parts information.
Equipment Repair
Repair work is done most satisfactorily at the factory. When returning equipment, carefully pack modules and
other units, etc. All equipment should be returned in the original packing containers if possible. Any damage due
to improperly packed items will be charged to the customer.
Document Overview
Section 1 provides the Product Description. Section 2 provides Specifications and External Connections. Sec-
tion 3 presents applications with related Catalog Numbers for ordering purposes. Installation, Operation and
Maintenance are described in Section 4, with related Setting Calculations in Section 5. Appendices A thru H
include related module circuit descriptions. Acceptance Tests are described in Appendix I. Computer Commu-
nications are described in Appendix J, Application Notes in Appendix K, and Systems Diagrams are included in
Appendix L.
Contents of Relay System
The REL 352 Relay System includes the style numbers, listed below, for each module.
Module Style
• Backplane - - - - - - - - - - - 1611C26 • Microprocessor - - - - - - 1611C22
(Sub-Backplane Xfmr) - - - - - 1502B38 • Display - - - - - - - - - - 1498B40
• Interconnect - - - - - - - - - - 1618C45 • Power Supply - - - - - - -1611C24
• Relay Output - - - - - - - - - - 1611C27 • Analog Input- - - - - - - -1611C23
• Optoisolated Input - - - - - - - 1618C38

Power Automation and Protection Division iii REL 352 Version 1.00
TABLE
CONTENTS
OF
PRODUCT DESCRIPTION 1➧
SPECIFICATIONS 2➧
APPLICATIONS & ORDERING
INFORMATION 3➧
INSTALLATION, OPERATION &
MAINTENANCE 4➧
SETTING CALCULATIONS 5➧
BACKPLANE MODULE A➧
INTERCONNECT MODULE B➧
RELAY OUTPUT MODULE C➧
OPTOISOLATED INPUT MODULE D➧
MICROPROCESSOR MODULE E➧
DISLAY MODULE F➧
POWER SUPPLY MODULE G➧
ANALOG INPUT MODULE H➧
ACCEPTANCE TESTS I➧
COMPUTER COMMUNICATIONS J➧
APPLICATION NOTES K➧
SYSTEM DIAGRAMS L➧
*Star next to section title indicates changes made within chapter since last issue

REL 352 Version 1.00 iv Power Automation and Protection Division
List of Figures
Figure No. Page No.
1-1 REL 352 Front Panel (photo) - - - - - - - - - - - - - - - - - - - - - - - - - 1-6
1-1a REL 352 56/64 kbps Digital Communication Direct Digital Interface (rear view) - 1-7
1-2 Layout of REL 352 Modules Within Inner And Outer Chassis - - - - - - - - - - 1-8
1-3 INCOM/PONI Communication Interface Device (photo)- - - - - - - - - - - - 1-9
1-4 Block Diagram of REL 352 Relay- - - - - - - - - - - - - - - - - - - - - - - -1-10
2-1 REL 352 Outline Drawing - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4
3-1 REL 352 Phase Comparison, Fault Recognition- - - - - - - - - - - - - - - - -3-10
3-2 REL 352 Symmetrical Component Filter - - - - - - - - - - - - - - - - - - - -3-11
3-3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-11
3-4 Internal Fault- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-12
3-5 External Fault - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-13
3-6 Phase Comparison Logic- - - - - - - - - - - - - - - - - - - - - - - - - - - -3-14
3-7 Pilot Trip Logic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-15
3-8 Fault Detector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-16
3-9 Change Detector- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-16
3-10 Mho Characteristics for Single Phase-to-ground Fault Detection- - - - - - - - -3-17
3-11 Mho Characteristics for Three-Phase Fault Detection - - - - - - - - - - - - - -3-18
3-12 Mho Characteristics for Phase-to-phase Fault Detection- - - - - - - - - - - - -3-19
3-13 Loss of Potential Block Logic - - - - - - - - - - - - - - - - - - - - - - - - - -3-20
3-14 Zone 2 And Zone 3 Back-up System - - - - - - - - - - - - - - - - - - - - - -3-21
3-15 Optional Directional Overcurrent Units - - - - - - - - - - - - - - - - - - - - -3-22
3-16 Blinders For The Out-of-step Logic - - - - - - - - - - - - - - - - - - - - - - -3-23
3-17 OST And OSB Logic Diagram - - - - - - - - - - - - - - - - - - - - - - - - -3-24
4-1 REL 352 Backplate- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-12
A-1 REL 352 Backplane Module Component Location Diagram - - - - - - - - - - - A-2
A-2 REL 352 Backplane/transformer Module PC Board - - - - - - - - - - - - - - - A-3
A-3 REL 352 Backplane/transformer Module Schematic- - - - - - - - - - - - - - - A-4
B-1 REL 352 Interconnect Module Component Location Diagram - - - - - - - - - - B-2
B-2 REL 352 Interconnect Module Schematic- - - - - - - - - - - - - - - - - - - - B-3
C-1 REL 352 Relay Output Module Component Location Diagram- - - - - - - - - - C-2
C-2 REL 352 Relay Output Module Schematic (Sheet 1 of 3) - - - - - - - - - - - C-3
C-2 REL 352 Relay Output Module Schematic (Sheet 2 of 3) - - - - - - - - - - - C-4
C-2 REL 352 Relay Output Module Schematic (Sheet 3 of 3) - - - - - - - - - - - C-5
D-1 REL 352 Optoisolated Input Module Component Location Diagram - - - - - - - D-2
D-2 REL 352 Optoisolated Input Module Schematic (sheet 1 of 2) - - - - - - - - - - D-3
D-2 REL 352 Optoisolated Input Module Schematic (sheet 2 of 3) - - - - - - - - - - D-4
1
2
3
4
A
B
C
D

Power Automation and Protection Division v REL 352 Version 1.00
E-1 Microprocessor Module Block Diagram - - - - - - - - - - - - - - - - - - - - - E-3
E-2 REL 352 Processor 1 Memory Map- - - - - - - - - - - - - - - - - - - - - - - E-4
E-3 REL 352 Processor 2 Memory Map- - - - - - - - - - - - - - - - - - - - - - - E-4
E-4 REL 352 Microprocessor Module Component Location Diagram- - - - - - - - - E-5
E-5 REL 352 Microprocessor Module Schematic - - - - - - - - - - - - - - - - - - E-6
E-5 REL 352 Microprocessor Module Schematic - - - - - - - - - - - - - - - - - - E-7
E-5 REL 352 Microprocessor Module Schematic - - - - - - - - - - - - - - - - - - E-8
E-5 REL 352 Microprocessor Module Schematic - - - - - - - - - - - - - - - - - - E-9
E-5 REL 352 Microprocessor Module Schematic - - - - - - - - - - - - - - - - - E-10
E-5 REL 352 Microprocessor Module Schematic - - - - - - - - - - - - - - - - - E-11
E-5 REL 352 Microprocessor Module Schematic - - - - - - - - - - - - - - - - - E-12
F-1 REL 352 Display Module Component Location Diagram- - - - - - - - - - - - - F-2
F-2 REL 352 Display Module Schematic - - - - - - - - - - - - - - - - - - - - - - F-3
G-1 REL 352 Power Supply PC Board - - - - - - - - - - - - - - - - - - - - - - - G-3
G-2 REL 352 Power Supply Schematic (See inside back cover) - - - - - - - - - - - G-4
H-1 REL 352 Analog Input Module Block Diagram- - - - - - - - - - - - - - - - - - H-2
H-2 REL 352 Analog Input Module Component Location Diagram - - - - - - - - - - H-3
H-3 REL 352 Analog Input Module Schematic- - - - - - - - - - - - - - - - - - - - H-4
H-3 REL 352 Analog Input Module Schematic- - - - - - - - - - - - - - - - - - - - H-5
H-3 REL 352 Analog Input Module Schematic- - - - - - - - - - - - - - - - - - - - H-6
H-3 REL 352 Analog Input Module Schematic- - - - - - - - - - - - - - - - - - - - H-7
K-1 REL 352 / TCF-10B Intercorrecting Diagram - - - - - - - - - - - - - - - - - - K-1
K-2 Signal Polarity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - K-2
K-3 Square Wave Duration 60 Hz- - - - - - - - - - - - - - - - - - - - - - - - - - K-4
K-4 Square Wave Duration 50 Hz- - - - - - - - - - - - - - - - - - - - - - - - - - K-5
L-1 REL 352 Block Diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - L-2
L-2 REL 352 Logic Diagram (sheet 1 of 3) - - - - - - - - - - - - - - - - - - - - - L-3
L-2 REL 352 Logic Diagram (sheet 2 of 3) - - - - - - - - - - - - - - - - - - - - - L-4
L-2 REL 352 Logic Diagram (sheet 3 of 3) - - - - - - - - - - - - - - - - - - - - - L-5
L-3 REL 352 Backup System Logic Diagram - - - - - - - - - - - - - - - - - - - - L-6
E
F
G
H
K
L
List of Figures (continued)
Figure No. Page No.

Power Automation and Protection Division I.L. 40-201.9
REL 352 Version 1.00 1-1
1
1. INTRODUCTION
The REL 352 relay assembly ( see Figure 1-1 ) is a numerical ( fully digita l) phase comparison
transmission line protection system, with optional distance back-up protection.
2. REL 352 CONSTRUCTION
The standard nomenclature for ABB relay protection equipment is as follows:
• Cabinet – contains fixed-racks, swing-racks, or open racks
• Rack – contains one or more chassis (e.g., the REL 352)
• Chassis – contains several modules (e.g., Microprocessor or Power Supply)
• Module – contains a number of functional circuits (on printed circuit board)
• Circuit – a complete function on a printed circuit board (e.g., analog-to-digital conversion)
• The REL 352 relay assembly consists of an outer-chassis and an inner-chassis which slides
into the outer-chassis. The REL 352 conforms to the following dimensions and weight (
also
see Section 2, subsection 6
):
• Height 7" (requires 4 rack units @ 1.75" each); 177 mm
• Width 19"; 483 mm
• Depth 13.6"; 345 mm
• Weight 38 Lbs; 17.5 kg
All of the relay circuitry, with the exception of the input isolation transformers and first-line surge
protection, are mounted on the inner chassis, to which the front panel is attached. The outer
chassis has a backplate, which is a receptacle for all external connections, including Digital
Communication Interface. Two optional FT-14 switches are mounted in the two peripheral ar-
eas of the outer chassis ( see Figure 4-1, pg. 4-12 ). The FT-14 switches permit convenient and
safe disconnection of trip, ac and dc input circuits, and provide for injection of test signals.
3. REL 352 MODULES
The inner and outer chassis, together, contain standard modules, plus the optional relay output
for extended contact output applications ( see Figure 1-2, pg. 1-8 ). The Backplane module is con-
nected to the backplate (outer chassis). The remaining modules are attached to the inner chas-
sis:
• Interconnect Module
• Relay Output Module
• Optoisolated Input Module
• Microprocessor Module
• Display Module
• Power Supply Module
• Analog Input Module
Section 1. PRODUCT DESCRIPTION

I.L. 40-201.9 Power Automation and Protection Division
1-2 REL 352 Version 1.00
Circuit descriptions for each module, may be found in Appendices A thru H, in accordance with
the list in the Preface to this document ( see “Contents of Relay System” ).
1.1 Backplane Module
The Backplane Assembly includes three voltage transformers, three current transformers, four
filter chokes and surge protection capacitors.
The Backplane Module (see Appendix A) receives all external connections and connects directly
to the Interconnect module, thru plug-in connectors (J11, J12, J13); and to the Relay Output
and Optoisolated Input modules, mounted on the Interconnect module (via connectors JA1,
JA2, JA3, JA4), which provide the connections between the inner and outer chassis.
The INCOM/PONI®1 (see Figure 1-3 ) is mounted on the Backplate of the outer chassis and is
connected to the Backplane module (via connector J4).
1.2 Interconnect Module
The Interconnect module ( see Appendix B ) becomes the floor of the REL 352 inner chassis; it
provides electrical connections from and to all other modules: from the Backplane (at the rear),
to the Analog Input and Power Supply modules (at left and right, respectively), to the Relay Out-
put and Optoisolated Input modules in the center, and to the Microprocessor and Display mod-
ules at the front of the inner chassis.
The Interconnect module receives inputs VAG, VBG, VCG, IA, IB, ICfrom the Backplane module
and feeds them to the Analog Input module.
This module also contains the optoisolated transistor output for control of external communica-
tion equipment transmitter such as Power Line Carrier or Audio Tone.
1.3 Relay Output Module
There are three versions of this module (they are installed on the Interconnect module):
• Option
• Base 1
• Base 2 (
See Appendix C for contact output functions )
The Option version is used for Extended Contact Output requirements.
1.4 Optoisolated Input Module
This module provides an opto-isolated interface between:
• Optoisolated inputs contaminated by external noise, and
Logic level inputs to the Microprocessor module
( See Appendix D for more details )
• Binary inputs from PLC (Audio Tone) communication receiver such as MARK, SPACE and
CHANNEL Failure.
1. “INCOM”

stands for INtegrated COMmunications, a product of The Westinghouse Electric Corporation. The “PONI”
acronym stands for Product Operated Network Interface.

Power Automation and Protection Division I.L. 40-201.9
REL 352 Version 1.00 1-3
1
1.5 Microprocessor Module
This module contains two processor systems (connected via the Dual Port RAM), which per-
form two main functions:
• Processor 1 samples the analog inputs and provides the operator interface
• Processor 2 is the protection processor
Each processor system (P1 and P2) contains the following elements:
• Microprocessor — 16 bit microcontroller (Intel 80C196) operating at 12 MHz.
• EPROM — an ultraviolet erasable read-only memory for program
storage.
• RAM — a read-write, static, random access volatile memory for
performing data storage.
Processor 1 (P1) has access to:
• EEPROM — electrically erasable, read-write non-volatile memory for
settings and fault-data storage.
• Real-Time Clock — is accessed by Processor 1, to time-stamp the events.
1.6 Display Module
The Display module interfaces with the Processor 1 system of the Microprocessor module. The
Display module contains:
• 2 blue-vacuum fluorescent alphanumeric displays for value and function fields (each field
has 4 characters)
• 7 LEDs (with 7 corresponding keys for selection purposes) provide function interpretation
capabilities
( See Section 4 and Appendix F for further details )
1.7 Power Supply Module
Three different styles of power supply boards are required to accommodate the input voltage
ranges listed below. The REL 352 relay is capable of continued operation during a 200 msec
voltage dip from the dc battery input; the magnitude of this voltage dip is also shown below:
As an option this module contains two independent power supplies, with diode-auctioneered
outputs for reliability purposes; both supplies are powered from a dc battery voltage.
The switching power supply, operating at 25 kHz, generates transformer-isolated voltages as
follows:
Nominal
Battery (Vdc) Input Range (Vdc) Voltage Dip (Vdc)
48/60 38-70 28
110/125 88-145 73
220/250 176-280 146

I.L. 40-201.9 Power Automation and Protection Division
1-4 REL 352 Version 1.00
See Appendix G for further details
1.8 Analog Input Module
This module ( see Appendix H ) interfaces with the voltage and current transformers that are
mounted on the Backplane module. These transformers provide the following ac values: VA,
VB, VC, IA, IB, IC. These values are applied to active third-order Butterworth antialiasing filters,
with a cut-off frequency determined by the Nyquist criterion and the system sampling rate. Val-
ues IA, IB, ICare summed to produce 3I0.
All 7 inputs (VA, VB, VC, IA, IB, IC, 3I0) are connected to the multiplexer and to the A/D converter.
The A/D converter is a self-calibrating 12-bit (plus sign), with an internal track-and-hold ampli-
fier. Additionally, the autoranging circuitry provides 16 bits of dynamic range needed to mea-
sure high fault current values.
1.9 Contact Outputs
• 4 make contacts (2 trip, 2 BFI); 8 additional optional contacts when Extended Contact Output
option is used
• Reclose initiate (2 Form A)
• Reclose initiate (2 Form A)
• Reclose block (2 Form A)
• General start (1 Form A)
• System failure alarm (1 Form B)
• Trip alarm (2 Form A)
• Channel alarm (1 Form A)
2. SELF-CHECKING SOFTWARE
REL 352 continually monitors its ac input subsystems using multiple A/D converter calibration-
check inputs, plus loss-of-potential and loss-of-current monitoring. Failures of the converter, or
any problem in a single ac channel which unbalances nonfault inputs, trigger alarms. Self-
checking software includes the following functions:
a. Digital Front-end A/D Converter Check
b. Program Memory Check Sum
Immediately upon power-up, the relay does a complete ROM (EPROM) checksum of program
memory. Afterwards, the REL 352 relay continually computes the program memory checksum.
System
Voltage Circuitry Supplied System Voltage Circuitry Supplied System Voltage Circuitry Supplied
8.5 Vdc Processor Board
+5 Vdc Supply -12 Vdc Analog circuitry -24 Vdc Channel Modem
VF Display COPS
Chips
+12 Vdc Analog Circuitry +24 Vdc Channel Modem,
PONI Module 6.5 Vac Vacuum Fluorescent Display Filament

Power Automation and Protection Division I.L. 40-201.9
REL 352 Version 1.00 1-5
1
c. Power Up RAM Check
Immediately upon power-up, the relay does a complete ROM (EPROM) checksum of program
memory. Afterwards, the REL 352 relay continually computes the program memory checksum.
d. Nonvolatile RAM Check
All front-panel-entered constants (settings) are stored in nonvolatile RAM in three identical
arrays. These arrays are continuously checked by the program. If all three array entrees dis-
agree, a nonvolatile RAM failure is detected.
3. UNIQUE REMOTE COMMUNICATION (WRELCOM) PROGRAM
Two optional types of remote interface can be ordered.
• RS232C for single point computer communication.
• INCOM for local network communication.
A special PC software (WRELCOM RCP and OSCAR) program are available for obtaining or
sending the setting information to the REL 352. The REL 352 front panel shows two fault
events (last and previous faults), but with the remote communication, 16 fault events and 3
records of oscillographic data can be obtained and stored. Each record of the oscillographic
data contains 8-cycle information (1-prefault and 7-post-fault), with 7 analog inputs and 24 dig-
ital data (at the sampling rate of 12 per cycle).

I.L. 40-201.9 Power Automation and Protection Division 1-6 REL 352 Version 1.00
Figure 1-1. REL 352 Front Panel

Power Automation and Protection Division I.L. 40-201.9 REL 352 Version 1.00 1-7
1
Figure 1-1a. REL 352 (Rear view)

I.L. 40-201.9 Power Automation and Protection Division 1-8 REL 352 Version 1.00
Figure 1-2. Layout of REL 352 Modules within Inner and Outer Chassis
PONI BACKPLANE BD.
PROCESSOR BD.
DISPLAY BD.
FT-14
POWER SUPPLY
ANALOG INPUT BD.
FT-14
OPTOISOLATED INPUT BD. RELAY OUTPUT BDS.
XFMR
INTERCONNECT BD.
SPT
Top View

I.L. 40-201.9 Power Automation and Protection Division 1-10 REL 352 Version 1.00
Figure 1-4. Block Diagram of REL 352 Relay
Sub 99
1618C33
ØA Trip
Direction
Line
ct IAR
IA
6
5

Power Automation and Protection Division I.L. 40-201.9
REL 352 Version 1.00 2-1
2
Section 2. REL 352 SPECIFICATIONS
1 TECHNICAL
1.1 Principle of Operation
Phase Comparison, Single-Comparer and Dual Comparer using Low Speed Power Line
Carrier (ON-OFF and FSK), Audio Tone and Microwave.
1.2 Miscellaneous
Nominal ac Voltage (VLN) at 60 Hz 69.3 V rms
Nominal ac Current (In) 1 or 5 A rms
Rated Frequency 50 or 60 Hz
Maximum Permissible ac Voltage:
• Continuous 160 V rms
— (limited by maximum input to A/D converter)
• 10 Second 240 V rms
— (limited by input transformer flux density)
Maximum Permissible ac Current:
• Continuous 15 A rms
— (limited by thermal characteristics)
• 1 Second
Operational 160 A rms-5Anominal
32 A rms - 1 A nominal
— (limited by maximum input
to the A/D converter)
Thermal 500 A
dc Battery Voltages:
Nominal Input Range
60/48 Vdc 38 - 70 Vdc
110/125 Vdc 88 - 150 Vdc
220/250 Vdc 176 - 280 Vdc
dc Burdens:
Battery 15 W normal
40 W tripping
ac Burdens:
Volts per Phase 0.02 VA at 70 Vac
Current per Phase 0.45 VA at 5 A
2 EXTERNAL CONNECTIONS
Terminal blocks located on the rear of the chassis suitable for #14 square tongue lugs.
Wiring to FT-14 switches suitable for #12 wire lugs.

I.L. 40-201.9 Power Automation and Protection Division
2-2 REL 352 Version 1.00
3 CONTACT DATA
Trip Contacts — make & carry 30 A for 1 second, 10 A continuous capability, break 50 watts
resistive or 25 watts with L/R = .045 seconds.
• Non-Trip Contacts
1 A Continuous
0.1 A Resistive Interrupt Capability
Contacts also meet IEC - 255-6A, IEC - 255-12, IEC -255-16, BS142-1982.
4 COMMUNICATION EQUIPMENT INTERFACE
4.1 INPUTS Optoisolated (7500 V peak) jumper configurable for 20 V, 48 V, 125 V
external dc Power Supply
Operation “On” State Current:
20 V 15 mA
48 V 6 mA
125 V 6 mA
Interfaces to Power Line Carrier (ON-OFF and FSK) Audio Tone and Microwave.
Mark 1
Space 1
Channel Failure 1
Mark 2
Space 2
Channel Failure 2
4.2 OUTPUT Optoisolated (7500 V peak) Power Transistor Output (Rated 400 V) supporting
external dc
power supply operation in the range of 20 - 150 V dc.
Interfaces to:
Carrier on/off (for ON-OFF PLC) or Carrier mark / space (for FSK PLC) control.
5 OPTIONAL COMPUTER/NETWORK INTERFACE
• RS232C/PONI — for single point computer communications
• INCOM/PONI — for local network communications using INCOM network
6 CHASSIS DIMENSIONS AND WEIGHT
Height 7" (177.8 mm) 4 Rack Units ( See Figure 2-1 )
Width 19" (482.6 mm)
Depth 14" (356 mm) including terminal blocks
Weight 38 lb. (17.5 kg)
3 Terminal Application
}

Power Automation and Protection Division I.L. 40-201.9
REL 352 Version 1.00 2-3
2
7 ENVIRONMENTAL DATA
Ambient Temperature Range
• For Operation — 20°C to +60°C
• For Storage — 40°C to +80°C
Insulation Test Voltage 2.8 kV, dc, 1 minute (3.2 kV dc, 1 sec) ANSI, C37.90 IEC-255-5
Open contacts 1400 Vdc continuous
Impulse Voltage Withstand 5 kV Peak, 1.2/50 microseconds, 0.5 Joule, (IEC-225-5)
Surge Withstand Voltage 3 kV, 1 MHz (ANSI C37.90.1, IEC-255-22-1)
Fast Transient Voltage 4 kV, 10/100 ns Withstand (ANSI C37.90.1, IEC 255-22-4)
EMI Field Strength Withstand 25 MHz-1GHz, 10V/m Withstand (ANSI C37.90.2)
Electrostatic Discharge Tests (IEC 255-22-2, IEC, 801-Y) 8/12 kV test voltage.
Emission Tests (EN 55022, Class A)