16
R E R6 20
A DVA N C ED R EC LOSER P R OT EC T I O N & CO N T R O L
The UPS makes use of its integrated temperature
sensor to determine when the heater should en-
gage. The UPS can also select to switch off the
heater in the event there is no or limited input
power. The heater will not be energized when oper-
ating off battery back up power. For example if a
pole operation has just occurred the heater may be
switch off so more available power can go into
charging the boost capacitor. This circuit can con-
duct and switch 8 amps at 250VAC continuously.
16. Universal Power Driver (UPD)
The UPD is normally attached to three poles for
control of a three-phase recloser in an electrical
distribution system. Open and Close commands
(local or remote) goes through six half-bridge driv-
ers of UPD that are connected to form three inde-
pendent full-bridge drive channels. The purpose of
each channel is to allow current flow through mag-
netic actuator to be in the forward or reverse direc-
tion. The UPD is equipped with six binary inputs
that are designed for reading switches (recloser
and yellow handle position) located in the High
Voltage Cabinet.
17. Access control
To protect the protection and control relay from
unauthorized access and to maintain information
integrity, the relay is provided with a four-level,
role-based authentication system with administra-
tor programmable individual passwords for the
viewer, operator, engineer and administrator level.
The access control applies to the front panel user
interface, the web-browser based user interface
and the PCM600 tool.
18. Inputs and outputs
Standard and optional binary inputs and outputs
(I/O) also depend upon the selected protection and
control relay configuration. Table 3 details the ana-
log inputs and I/O available for each configuration.
The phase current inputs are user programmable
for 5 A or 1 A CT secondary nominal rating. The
fourth CT is used by the SEF/HIZ and has a 0.2/1 A
nominal rating. The sensitive earth fault CT pro-
vides SEF protection and includes a separate, inde-
pendent HIZ protective function for detecting
downed conductors.
The nominal secondary voltage of the six-phase VT
inputs are user programmable. Both phase-to-
phase (open delta) voltages and phase-to-ground
(wye) voltages can be connected to protection and
control relay. The binary input turn-on thresholds
are programmable from 18…176 V DC by adjusting
the relay’s parameter settings. Besides the dedi-
cated trip/close outputs that are mandatory to
drive the magnetic actuators in reclosers, RER620
provides additional user programmable binary in-
puts and outputs.
All binary input and output contacts are freely pro-
grammable with the signal matrix tool in PCM600
software user tool.
—
Table 3. Input/output overview
Standard
configuration
Analog inputs
Binary inputs/
outputs
CT
VT
BI
BO
Basic
4
6
4
1)
6
1)
Full with optional I/O
4
6
20
2)
14
2)
1) In addition to the 4 Binary Inputs and 6 Binary Outputs, UPD (Uni-
versal Power Driver) has a 3 Binary Outputs to drive recloser (Open/
Close) and 4 Binary Inputs. Three binary inputs are connected to the
GridShield position indication (52b contact), one input is reserved for
69 switch (optional in GridShield assembly).
2) Two Optional Binary I/O cards need to be installed in slot X[105] and
X[110]
19. Communications
The protection and control relay supports a range
of different communication protocols: IEC 61850,
DNP3 Level 2+, IEC 60870-5-101, IEC 60870-5-104,
Modbus and PG&E 2179. Operational information
and controls are available through these protocols.
Unique communication functionality, for example,
peer-to-peer communication between relays is
available via the IEC 61850 communication proto-
col. The IEC 61850 communication implementation
supports all monitoring and control functions. Ad-
ditionally, parameter setting and disturbance file
records can be accessed using the IEC 61850-8-1
protocol. Disturbance files are available to any Eth-
ernet-based application in the standard COM-
TRADE format. Further, the relay can send and re-
ceive binary signals from other Protection and
control relay (peer-to-peer communication) using
the IEC61850-8-1 GOOSE profile. The relay meets
the GOOSE performance requirements for tripping
applications in distribution substations, as defined
by the IEC 61850 standard. The relay can simultane-
ously report events to five different clients - maxi-
mum five IEC 61850-8-1 clients, maximum five
Modbus clients, maximum two clients in total for
IEC 60870-5 -101 and/or IEC 60870-5-104 and maxi-
mum one DNP3.0 Level 2+client with total number
not exceeding five.
All communication connectors, except for the front
RJ45 connector, are located in the back of the unit
on the left most card slot. This slot remains in the
case when the draw out unit is removed eliminating
the need to disconnect communication connec-
tions.
