1–2
M-3520 Instruction Book
Chapter 5: Installation
This chapter provides all the mechanical information,
including dimensions, external connections and
equipment ratings required for physical installation
of the relay. For reference, the Three-Line Connection
Diagram is repeated from Chapter 2. A
commissioning checkout procedure is outlined, using
the HMI
option and IPScom
to check the external
CT and VT connections. Other tests, which may be
desirable at time of installation, are described in
Chapter 6.
Chapter 6: Testing
This chapter provides step-by-step test procedures
for each M-3520 function as well as the diagnostic
mode procedures and the autocalibration procedure
using the HMI.
Appendix A: Configuration Record forms
This appendix supplies a set of forms to record
and communicate the inputs required for the proper
operation of the M-3520, as well as forms illustrating
“As Shipped” settings for all functions.
Appendix B: Communications
This appendix describes the communications
equipment, the protocol used, the communication
ports, and the port signals.
Appendix C: Self-test Error Codes
This appendix lists all the M-3520 error codes and
their descriptions.
Appendix D: Inverse Time Curves
This appendix contains graphs of the four standard
Inverse Time Curves and the four IEC overcurrent
curves.
Appendix E: Layup and Storage
This appendix includes the recommended storage
parameters, periodic surveillance activities and layup
configuration for the M-3520 Intertie Protection Relay.
1.2
M-3520 Intertie Protection
Relay
The M-3520 Intertie Protection Relay (see Figure
1-1), is a microprocessor-based unit that uses digital
signal processing technology to provide protection
to the intertie between dispersed storage and
generation (DSG) and a utility.
The M-3520 provides 17 standard and 3 optional
protective relay functions (see Table 1-1). The
nomenclatures of these functions are derived from
the standards of ANSI/IEEE C37.2-1991, Standard
Electric Power Systems Device Function Numbers.
Six control/status input contacts (located on rear
side of unit) can be programmed to block any relay
function and/or trigger the oscillograph recorder.
Any of the functions or control/status input contacts
can be individually programmed to activate one or
more of the eight programmable output contacts.
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Table 1-1
M-3520 Device Functions
Summary of Contents for M-3520
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