GE MDP User manual
GEK
-
100682
Table
of
Contents
PRODUCT
DESCRIPTION
NOMENCLATURE
APPLICATION
TECHNICAL
SPECIFICATIONS
Ranges
and
Settings
OPERATING
PRINCIPLES
Inputs
External
Inputs
COMMUNICATIONS
PORT
Installation
/
Replacement
of
a
Communications
Upgrade
Card
.
,
MEASUREMENT
Inverse
Time
Unit
Instantaneous
Unit
4
5
5
6
8
9
9
9
9
9
10
10
12
Changing
Settings
Settings
12
13
Pickup
TOC
Pickup
IOC
Time
Dial
'
Curve
Selection
IOC
Delay
Communications
Address
OUTPUT
CONTACT
CONFIGURATION
13
13
13
13
13
13
14
14
Display
and
Reset
Self
Test
and
Error
Routines
CONSTRUCTION
Internal
Connection
Diagram
Displays
RECEIVING
,
HANDLING
,
&
STORAGE
ACCEPTANCE
TESTS
Visual
Inspection
Electrical
Tests
15
15
15
15
15
16
16
16
16
Inverse
Time
Unit
Instantaneous
Unit
Ground
Unit
18
18
18
MDP
-
Link
Software
,
Overview
System
Reuirements
Installation
GENERAL
OPERATION
Main
Horizontal
Menu
Bar
.
Pull
Down
Menus
Dialog
Boxes
List
Boxes
Entering
Text
and
Numbers
PROGRAM
OPERATION
Main
Menu
Relay
Functions
18
18
19
19
19
19
19
20
21
21
21
21
21
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|
|
|
lOgout
22
Hang
up
phone
request
relay
Data
request
Fault
data
Reset
fault
data
Breaker
status
Trip
breaker
Close
breaker
Local
functions
go
to
DOS
Setup
Communication
port
number
Dial
type
Modem
connection
time
Relay
parameters
..
.
.
Add
relay
to
list
dElete
relay
list
display
mode
Memory
available
...
Help
Exiting
MDP
-
LINK
INSTALLATION
,
.
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
22
22
22
23
.
23
23
24
24
24
24
24
24
24
25
25
25
26
.
<
'
26
26
26
26
27
m
Cover
Photo
:
8919557
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor
provide
for
everypossible
contingency
to
be
met
in
connection
with
installation
,
operation
or
maintenance
.
Should
further
information
be
desired
or
should
particular
problems
arise
which
are
not
covered
sufficiently
for
the
purchaser
'
s
purposes
,
the
matter
should
be
referred
to
the
General
Electric
Company
(
USA
)
To
the
extent
required
the
products
described
herein
meet
applicable
ANSI
,
IEEE
and
NEMA
standards
;
but
no
such
assurance
is
given
with
respect
to
local
codes
and
ordinances
because
they
vary
greatly
.
§
1
m
3
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-
100682
MDP
DIGITAL
TIME
OVERCURRENT
RELAYING
SYSTEM
PRODUCT
DESCRIPTION
Phase
and
ground
current
metering
;
Operating
time
and
fault
current
of
the
last
trip
.
MDP
relays
digital
,
Type
microprocessor
-
based
,
non
-
directiona
!
overcurrent
relays
that
protect
against
phase
-
to
-
phase
and
phase
-
to
-
ground
faults
.
are
Breaker
status
•
v
>
:
'
Breaker
operation
(
RS
232
and
RS
485
versions
only
)
The
MDP
relay
performs
the
following
functions
:
The
MDP
series
relays
include
four
measuring
units
,
one
for
each
of
the
three
phase
currents
and
an
additional
one
for
ground
or
residual
current
,
Each
of
the
four
measuring
units
includes
a
time
and
an
instantaneous
overcurrent
unit
.
The
phase
settings
arc
combined
so
that
all
phase
units
are
set
the
same
.
Inverse
overcurrent
,
including
four
characteristic
curves
,
and
four
values
of
definite
time
protection
,
as
well
as
instantaneous
overcurrent
protection
with
programmable
delay
;
Phase
and
ground
current
measurement
;
CURRENT
RANGES
Nominal
Current
Inverse
Time
Unit
Instantaneous
unit
«
*
(
In
)
(
Is
)
Ground
1
,
5
to
13
,
125
Amps
0.5
to
4.375
Amps
0.1
to
0.875
Amps
Phase
5
Amp
Nominal
1.5
-
13.125
Amps
0.5
-
4.375
Amps
1
to
31
x
Is
(
All
Relays
)
0.5
-
4.375
Amps
0.3
to
2.625
Amps
0.1
to
0.875
Amps
0.05
to
0.4375
Amps
(
'
A
AMP
CT
)
1
Amp
Nominal
0.3
-
2.625
Amps
£
V
-
The
pickup
value
for
the
instantaneous
unit
can
be
adjusted
between
1
and
31
times
the
value
selected
for
the
inverse
-
time
unit
.
produced
(
A
)
by
an
instantaneous
unit
or
an
inverse
unit
,
or
(
B
)
by
phase
or
ground
.
That
selection
is
made
by
means
of
a
switch
behind
the
right
lower
side
of
the
nameplate
.
An
alarm
output
is
provided
,
to
signal
a
critical
alarm
such
as
power
-
supply
failure
or
self
-
check
failure
.
An
output
contact
is
provided
to
close
the
breaker
from
a
command
issued
via
the
Communications
Channel
.
The
instantaneous
unit
can
be
disabled
by
adjusting
the
setting
to
zero
(
0
)
times
the
inverse
value
.
The
MDP
relay
has
two
trip
output
relays
,
which
can
be
selected
to
indicate
whether
a
trip
has
been
©
4
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-
100682
©
NOMENCLATURE
1
MDP
0
000
A
No
communications
or
control
inputs
(
Block
Ground
,
Block
Instantaneous
,
Breaker
Status
)
Control
inputs
and
communications
upgrade
socket
CommNet
MOD
BUS
RTU
RS
232
RS
485
0
I
2
3
4
5
5
Amp
Nominal
,
0.5
to
4.375
Amps
Ground
5
Amp
Nominal
,
1.5
to
13.125
Amps
Ground
5
Amp
Nominal
,
0.1
to
0.875
Amp
Ground
1
Amp
Nominal
,
0.1
to
0.875
Amp
Ground
1
Amp
Nominal
,
0.3
to
2.625
Amp
Ground
1
Amp
Nominal
,
0.05
to
0.4375
Amp
Ground
5
Amp
Nominal
,
0.5
to
4.375
Amp
Ground
/
Phase
1
2
3
4
5
«
;
6
7
1
24
-
48
VDC
(
19
to
60
VDC
)
48
-
125
VDC
/
AC
(
38.5
to
150
VDC
/
AC
)
35
to
120
AC
110
-
250
VDC
(
88
to
285
VDC
)
85
to
240
AC
D
Revision
Level
2
3
APPLICATION
Time
-
overcurrent
relays
are
used
for
the
protection
of
feeders
,
transmission
lines
,
alternating
-
current
machines
and
transformers
,
and
for
numerous
other
applications
where
accurate
measurement
of
current
and
timing
is
necessary
.
The
operating
tune
of
associated
protective
devices
should
be
considered
in
the
selection
of
a
time
-
current
characteristic
for
a
particular
application
,
to
ensure
proper
coordination
with
a
minimum
of
circuit
isolation
.
Four
basic
time
-
current
characteristics
are
available
in
Type
-
MDP
relays
.
short
-
circuit
current
flowing
through
any
given
relay
is
more
dependent
upon
the
location
of
the
fault
relative
to
the
relay
than
on
the
system
generation
setup
at
the
time
of
the
fault
.
The
extremely
inverse
-
time
-
current
characteristic
shown
in
Figure
4
is
preferred
for
applications
where
sufficient
time
delay
must
be
provided
to
allow
a
re
-
energized
circuit
to
pick
up
an
accumulated
cold
load
without
unnecessary
tripping
on
inrush
currents
.
Distribution
-
feeder
circuits
are
a
good
example
of
such
applications
,
and
the
extremely
-
inverse
characteristic
is
best
suited
to
such
applications
because
it
more
nearly
approximates
typical
power
-
fuse
and
fuse
-
cutout
characteristics
.
m
The
inverse
-
time
-
current
characteristic
curves
are
shown
in
Figures
1
,
2
and
5
.
Figure
5
depicts
the
BS
142
inverse
curve
and
applies
to
the
1
Amp
model
relays
only
.
These
relays
are
generally
applied
where
the
short
-
circuit
-
current
magnitude
is
dependent
largely
upon
the
system
generating
capacity
at
the
time
of
the
fault
.
The
very
inverse
-
time
-
current
characteristic
shown
in
Figure
3
is
generally
applied
where
the
magnitude
of
The
general
practice
for
grounded
-
distribution
-
system
protection
is
to
use
three
phase
-
overcurrent
functions
for
protection
against
interphase
faults
and
a
ground
/
residual
overcurrent
function
for
single
-
phase
-
to
-
ground
faults
.
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GEK
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100682
The
use
of
a
separate
grounid
-
overcurrent
function
is
advantageous
because
it
can
generally
be
adjusted
to
provide
faster
and
more
sensitive
protection
for
single
-
phase
-
to
-
ground
faults
'
than
the
phase
-
overcurrent
functions
.
Typical
connections
for
such
an
application
are
shown
in
Figures
9
and
10
,
This
safety
factor
can
be
reduced
to
0.07
second
if
the
time
unit
is
instead
set
to
the
desired
time
accurate
tests
.
by
#
The
instantaneous
-
overcurrent
unit
can
be
applied
in
many
instances
to
reduce
the
fault
-
clearing
time
for
high
-
fault
currents
.
This
unit
is
normally
set
to
pick
up
only
on
internal
faults
in
the
protected
zone
.
Significant
transient
overreach
can
be
experienced
under
certain
conditions
,
and
this
must
be
taken
into
account
by
selecting
a
pickup
setting
that
is
higher
than
that
which
would
be
dictated
by
the
maximum
steady
-
state
external
-
fault
current
.
The
pickup
setting
of
the
MDP
time
unit
should
be
chosen
so
that
it
will
operate
for
all
short
circuits
in
the
protected
zone
,
and
also
provide
back
-
up
protection
for
short
circuits
in
the
immediately
-
adjacent
system
element
when
possible
.
The
time
-
unit
pickup
should
be
set
low
enough
to
ensure
that
the
minimum
fault
current
is
at
least
1.5
times
the
setting
.
IMPORTANT
NOTE
If
one
unit
(
instantaneous
or
inverse
)
operates
,
the
other
unit
(
inverse
or
instantaneous
)
will
also
operate
.
The
MDP
’
s
fault
report
will
record
the
first
fault
that
occurred
.
When
the
fault
is
cleared
the
MDP
’
s
fault
LED
’
s
will
display
Phase
-
Phase
,
Phase
-
Ground
,
Instantaneous
and
inverse
time
faults
.
See
display
section
on
how
to
interpret
the
display
for
various
fault
conditions
.
The
MDP
will
generate
a
new
fault
report
when
the
fault
current
drops
below
the
pick
-
up
value
and
a
new
fault
occurs
.
The
time
-
delay
adjustment
of
the
time
unit
should
be
chosen
to
assure
selectivity
with
the
protection
on
the
adjacent
system
elements
.
This
adjustment
should
be
made
for
the
condition
that
yields
maximum
fault
current
at
the
relay
location
.
The
time
delay
is
determined
by
the
adjacent
relay
operating
time
for
this
condition
,
plus
a
coordinating
time
allowance
that
includes
the
adjacent
circuit
-
breaker
maximum
operating
time
and
a
safety
factor
to
accommodate
any
uncertainties
.
Since
the
MDP
time
unit
has
insignificant
overtravel
,
the
only
relay
variation
that
needs
consideration
in
the
safety
factor
is
the
tolerance
on
the
time
curves
.
A
0.17
-
second
safety
factor
is
generally
used
if
the
relay
time
is
determined
by
selecting
a
time
-
dial
setting
from
the
time
curves
.
i
Contact
converter
input
CC
1
and
the
output
-
select
switch
of
the
MDP
allow
a
Zone
Selective
Interlocking
of
the
MDP
relays
.
This
scheme
provides
instantaneous
operation
(
with
a
minimum
time
delay
)
of
the
upstream
relay
for
faults
between
the
upstream
and
downstream
relays
.
Refer
to
Figure
11
for
a
typical
scheme
and
settings
considerations
.
Note
that
all
the
feeders
must
be
radial
,
with
no
,
or
very
weak
,
source
.
TECHNICAL
SPECIFICATIONS
Nominal
frequency
:
25
/
50
/
60
Hz
t
!
Nominal
current
:
1
or
5
amps
24
-
48
VDC
(
19
to
60
VDC
)
48
-
125
VDC
/
AC
(
38.5
to
150
VDC
/
AC
)
35
to
120
AC
110
-
250
VDC
(
88
to
285
VDC
)
85
to
240
AC
0.1
-
0.875
/
0.3
-
2.65
=
0.09
/
,
2.8
°
at
60
Hz
(
2.25
VA
at
5
A
)
0.1
-
0.875
/
0.3
-
2.65
=
0.09
/
,
2.4
°
at
50
Hz
(
2.25
VA
at
5
A
)
0.5
-
4.375
/
1.5
-
13.25
=
0.01
/
,
11.5
°
at
60
Hz
(
0.25
VA
at
5
A
)
0.5
-
4.375
/
1.5
-
13.25
=
0.01
/
,
9
,
7
°
at
50
Hz
(
0.25
VA
at
5
A
)
Less
than
3
watts
at
all
voltages
,
quiescent
Less
than
4.5
watts
at
maximum
voltages
Auxiliary
power
supply
:
AC
Burden
:
DC
6
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-
20
°
to
+
65
°
C
(
-
40
°
C
available
upon
request
)
-
40
°
to
+
65
°
C
Operating
:
Storage
:
Temperature
:
Overcurrent
Ratings
:
2
x
In
Three
Second
;
50
x
In
One
Second
:
100
x
In
Continuous
:
RATINGS
I
/
t
CT
34500
87500
13600
1
AMP
5
AMP
*
1
AMP
SPECIAL
*
Models
MDPx
6
have
a
sensitive
ground
CT
.
Relative
Humidity
:
Up
to
95
%
without
condensing
<
:
Accuracy
:
Operating
Value
:
Operating
Time
:
5
%
5
%
or
0.025
seconds
,
whichever
is
greater
Repeatability
:
Operating
Value
:
Operating
Time
:
1
%
2
%
or
0.025
seconds
,
whichever
is
greater
Output
and
Trip
Contacts
:
Closing
:
1
Contact
will
close
and
conduct
up
to
a
maximum
of
30
amps
for
tripping
duty
at
control
voltages
up
to
300
VDC
.
The
output
contact
is
also
rated
for
Capacitive
trip
devices
.
Interrupting
:
50
watts
resistive
with
a
maximum
of
2
amps
and
300
VDC
Continuous
:
5
amps
,
with
300
VDC
maximum
25
-
70
Hz
(
Note
:
responds
to
RMS
values
of
harmonics
to
600
Hz
)
Frequency
operating
range
:
Communications
Address
:
002
to
998
r
.
'
T
-
rv
§
NOTE
Interference
suppression
ground
connection
This
connection
should
be
as
short
as
possible
,
to
assure
maximum
protection
,
conductors
are
recommended
.
The
MDP
relay
contains
high
-
frequency
interference
protection
consisting
of
a
series
of
capacitors
connected
between
the
input
terminals
and
the
case
,
Braided
#
12
AWG
The
case
stud
of
the
relay
should
be
connected
to
ground
,
so
these
interference
suppression
circuits
can
perform
their
protective
function
.
7
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100682
RANGES
AND
SETTINGS
The
following
indicates
the
ranges
of
standard
models
.
Nominal
Currcntlnverse
Time
Unit
5
Amperes
Phase
Unit
Models
(
1
-
3
)
Phase
Unit
:
1.5
to
13.125
Amps
,
in
cumulative
increments
of
0.375
,
0
,
750
,
1
,
50
,
3.0
,
6.0
A
Ground
Unit
,
model
1
:
0
,
5
to
4
,
375
Amps
,
in
cumulative
increments
of
0.125
,
0.250
,
0
,
50
,
1
,
0
,
2.0
A
Ground
Unit
,
model
2
:
1.5
to
13.125
Amps
,
in
cumulative
increments
of
0.375
0.750
,
1
,
50
,
3.0
,
6.0
A
Ground
Unit
,
model
3
:
0.1
to
0.875
Amp
,
in
cumulative
increments
of
0.025
,
.
0.050
,
0
,
10
,
0.2
,
0.4
A
v
-
5
Amperes
Phase
Unit
Model
(
7
)
Phase
Unit
:
0.5
to
4
,
375
Amps
in
cumulative
increments
of
0.125
,
0.25
,
0.50
,
1.0
,
2.0
A
Ground
Unit
,
model
7
:
0.5
to
4.375
Amps
in
cumulative
increments
of
0.125
,
0.250
,
0.50
,
1.0
,
2.0
A
Nominal
Current
Inverse
Time
Unit
1
Ampere
Phase
Unit
Models
(
4
-
6
)
Phase
Unit
,
models
4
-
6
;
0
,
3
to
2
,
625
Amps
in
cumulative
increments
of
0
,
075
,
0.150
,
0.30
,
0.60
,
1.20
Ground
Unit
,
model
4
:
0
,
1
to
0.875
Amp
in
cumulative
increments
of
0.025
,
0.050
,
0.10
,
0.2
,
0.4
A
Ground
Unit
,
model
5
:
0.3
to
2.625
Amps
in
cumulative
increments
of
0.075
,
0.150
,
0.30
,
0
,
6
,
1.2
A
Ground
Unit
,
model
6
:
0.05
to
0.4375
Amp
in
cumulative
increments
of
0.0125
,
0.0250
,
0.050
,
0.1
,
0.2
I
*
-
*
Time
Delay
(
TOC
)
(
independent
for
phase
and
ground
)
Instantaneous
Unit
Time
Delay
(
independent
for
phase
and
ground
)
Depends
on
the
curve
selected
,
Five
Inverse
Time
curves
are
available
(
see
Figures
1
,
2
,
3
,
4
,
and
5
)
as
well
as
four
definite
times
(
maximum
time
2
,
4
,
6
,
8
seconds
)
,
all
in
the
same
relay
.
0
-
1.55
seconds
in
50
-
millisecond
steps
.
Phase
Operating
Curves
Curve
Selection
i
Inverse
/
BS
142
*
(
for
1
Amp
models
)
,
Long
Time
Inverse
,
Veiy
Inverse
,
and
Extremely
Inverse
.
Four
families
of
definite
time
characteristics
,
with
maximum
values
of
2
,
4
,
6
,
and
8
seconds
Instantaneous
Unit
Pickup
(
independent
for
phase
and
ground
)
1
-
31
times
the
pickup
of
the
TOC
setting
.
Setting
of
zero
(
0
)
disables
instantaneous
unit
(
X
)
no
multiples
selected
,
Between
each
family
of
curves
,
a
specific
curve
can
be
selected
between
0.5
and
10
in
cumulative
steps
of
0
,
5
,
1
,
2
,
2
and
4
for
5
Amp
relays
.
A
1
Amp
model
'
s
range
is
from
0.05
to
1.0
in
cumulative
steps
of
0.05
,
0.1
,
0
,
2
,
0
,
2
,
and
0
,
4
.
i
8
Courtesy of NationalSwitchgear.com
GEK
~
100682
©
Ground
Operating
Curves
Curve
Selection
EXTERNAL
INPUTS
Three
external
inputs
are
provided
.
One
,
when
energized
,
blocks
tripping
by
the
ground
units
.
The
second
blocks
the
phase
and
ground
instantaneous
trip
elements
when
it
is
energized
.
The
third
,
when
energized
,
indicates
that
the
Breaker
Status
is
"
closed
"
.
Diode
bridges
are
provided
on
all
inputs
;
thus
they
can
all
be
actuated
by
either
switched
-
to
-
positive
depending
on
the
polarity
connected
to
the
stud
.
These
inputs
can
be
energized
by
either
AC
or
DC
.
Inverse
/
BS
142
*
(
for
1
Amp
models
)
,
Long
Time
Inverse
,
Very
Inverse
,
and
Extremely
Inverse
,
Four
families
of
definite
time
characteristics
,
with
maximum
values
of
2
,
4
,
6
,
and
8
seconds
*
Between
each
family
of
curves
,
a
specific
curve
can
be
selected
between
0.5
and
10
in
cumulative
steps
of
0.5
,
1
,
2
,
2
,
and
4
for
5
amp
relays
.
A
1
amp
model
'
s
range
is
from
0.05
to
1.0
in
cumulative
steps
of
0.05
,
0.1
,
0
,
2
,
0.2
,
and
0
,
4
.
©
switched
-
to
-
negative
,
or
*
BS
142
is
the
INVERSE
curve
of
the
one
-
amp
model
.
NOTE
that
the
Breaker
Status
and
Block
Ground
inputs
,
CP
-
7
and
CP
-
6
respectively
,
must
be
switched
by
the
same
polarity
,
since
they
share
a
common
ground
(
CP
-
8
)
.
Communications
Address
•
<
;
A
setting
of
000
indicates
no
communications
and
sets
the
default
display
to
phase
A
Current
.
002
to
998
.
COMMUNICATIONS
PORT
The
MDP
relay
has
a
communications
feature
that
permits
easy
installation
of
various
communications
interface
modules
.
All
values
are
adjusted
with
dip
switches
located
at
the
front
of
the
relay
,
except
the
communications
address
,
which
is
located
on
the
rear
of
the
cradle
.
m
INSTALLATION
/
REPLACEMENT
OF
A
COMMUNICATIONS
UPGRADE
CARD
NOTE
1
.
To
install
a
communications
upgrade
card
or
replace
an
existing
card
,
begin
by
removing
the
relay
from
the
case
,
Refer
to
Figures
14
-
19
during
the
following
procedure
.
For
RS
232
and
RS
485
all
relays
will
respond
to
address
001
.
2
.
Before
continuing
,
connect
an
approved
wrist
grounding
strap
to
ground
,
to
discharge
any
static
electricity
in
your
body
that
could
damage
the
electronics
of
the
MDP
relay
.
A
wrist
strap
is
provided
with
the
communications
card
kit
.
The
wrist
strap
must
provide
a
"
safe
"
high
resistance
to
ground
.
OPERATING
PRINCIPLES
INPUTS
m
The
secondaiy
current
from
the
current
transformers
of
the
protected
line
is
connected
to
the
relay
and
immediately
reduced
via
the
internal
current
transformers
.
The
secondaries
of
the
relay
'
s
current
transformers
are
connected
across
input
resistors
,
yielding
a
voltage
proportional
to
the
relay
input
current
,
3
.
Remove
four
screws
attaching
the
nameplate
settings
board
and
the
NOMEX
insulation
paper
to
the
relay
cradle
.
(
Cover
photograph
)
Note
that
there
are
four
metal
spacers
between
the
nameplate
and
the
settings
board
.
Do
not
lose
them
or
let
them
fall
into
the
relay
assembly
.
Carefully
place
the
settings
board
on
top
of
the
cradle
to
expose
the
This
voltage
is
rectified
and
filtered
before
being
applied
to
the
multiplexor
and
analog
-
to
-
digital
converter
,
which
are
internal
to
the
microprocessor
.
©
9
Courtesy of NationalSwitchgear.com
GEK
-
100682
communication
card
’
s
SIMM
socket
located
on
the
lowest
board
(
digital
input
/
communications
board
)
,
SET
THE
COMMUNICATIONS
ADDRESS
(
Figure
19
)
before
restoring
the
cradle
to
the
case
.
f
4
.
To
expose
the
SIMM
socket
located
on
the
lowest
board
,
carefully
push
down
on
the
board
to
disengage
the
board
spacers
.
(
Figure
14
)
(
Do
not
try
to
remove
the
board
from
the
cradle
.
)
MEASUREMENT
A
timer
internal
to
the
microprocessor
generates
an
interrupt
every
millisecond
.
Phase
and
ground
measurements
are
made
at
each
of
these
interrupts
.
These
measurements
are
grouped
,
separately
for
each
phase
and
ground
,
in
groups
of
ten
,
and
the
average
of
the
maximum
value
of
these
groups
is
taken
.
Replacing
Existing
Board
4
a
.
For
Replacement
Only
(
Skip
to
Step
5
if
installing
card
for
the
first
time
)
.
Si
*
•
>
.
This
average
is
converted
to
"
times
pickup
TOC
"
,
which
is
the
value
with
which
the
relay
works
.
This
value
is
displayed
in
5
second
intervals
.
If
you
are
replacing
an
existing
SIMM
card
,
then
the
old
one
needs
to
be
removed
!
Start
by
simultaneously
pushing
outwards
the
catches
on
either
side
of
the
SIMM
board
,
while
lifting
the
board
to
a
45
°
angle
.
This
will
release
the
board
.
INVERSE
TIME
UNO
'
Installing
New
Board
The
times
-
pickup
-
TOC
measurement
obtained
is
compared
,
independently
for
each
phase
and
ground
,
with
a
value
,
the
pickup
setting
,
that
corresponds
to
one
times
(
lx
)
pickup
TOC
,
If
the
measurement
exceeds
the
fixed
setting
,
a
Pickup
LED
lights
on
the
front
of
the
relay
,
Remove
the
communications
card
from
its
protective
packaging
.
Insert
the
card
into
the
SIMM
socket
at
a
45
°
angle
to
the
socket
with
the
integrated
circuits
facing
up
,
Push
the
card
down
until
it
snaps
into
the
socket
and
the
latches
on
either
side
of
the
board
catch
above
the
new
board
(
Figure
16
)
.
r
;
*
6
,
Re
-
assemble
the
MDP
relay
by
engaging
the
board
spacers
of
the
lowest
board
(
digital
input
/
communications
board
)
into
the
processor
board
above
it
.
(
Figure
18
)
Align
the
NOMEX
shield
on
the
solder
side
of
the
settings
board
.
Take
one
screw
and
spacer
at
a
time
and
push
the
screw
through
the
nameplate
,
spacer
,
settings
board
and
NOMEX
.
5
.
f
The
minimum
current
necessary
to
cause
the
Inverse
Time
measuring
elements
to
operate
is
never
less
than
the
set
value
(
Is
)
,
nor
greater
than
10
%
more
than
(
110
%
of
)
the
set
value
.
1.0
Is
<
Imin
<
1.1
Is
The
dropout
-
to
-
pickup
ratio
is
not
less
than
95
%
,
based
on
the
actual
operating
value
.
The
MDP
relay
incorporates
five
inverse
time
curves
and
four
definite
times
(
see
Figures
1
to
5
)
,
NOTE
i
The
NOMEX
protects
the
ribbon
cable
from
the
leads
on
the
settings
board
.
The
curve
within
a
family
is
selected
by
the
time
dial
.
The
characteristic
curves
for
the
MDP
relay
correspond
approximately
to
the
following
formulae
:
Tighten
the
screw
just
enough
to
hold
the
assembly
in
place
until
all
four
screws
are
aligned
.
When
all
the
screws
are
aligned
,
tighten
them
with
gentle
pressure
so
that
the
board
is
mounted
evenly
.
10
Courtesy of NationalSwitchgear.com
GEK
-
100682
51
.
(
INVERSE
)
(
5
Amp
rated
relays
)
From
1.1
to
4
times
the
pickup
TOC
:
0.0059
T
=
*
Dial
+
0.018
+
0.419
0.001
-
1
L
.
p
From
4
to
31
times
the
pickup
TOC
:
0.0069
U
T
-
-
0.252
*
Dial
+
0.018
0.001
-
1
L
-
p
BS
142
(
INVERSE
)
(
1
Amp
rated
relays
)
0.14
T
=
*
Dial
+
0.018
+
0
0.02
-
1
U
.
p
53
(
VERY
INVERSE
)
From
1.1
to
4
times
the
pickup
TOC
:
52.954
rTn
5
<
>
T
=
»
*
Dial
+
0.018
+
0.923
2.11
-
1
P
From
4
to
31
times
the
pickup
TOC
:
28.447
T
=
+
1.007
*
Dial
+
0.018
L
1.702
-
1
P
77
(
EXTREMELY
INVERSE
)
From
1.1
to
20
times
the
pickup
TOC
:
58.132
T
=
+
0.166
*
Dial
+
0.020
2.135
-
1
i
-
P
66
(
INVERSE
LONG
TIME
)
From
1.1
to
3
times
the
pickup
TOC
:
r
0.0006
T
~
*
Dial
+
5.644
v
.
-
0
,
00001
-
1
p
11
Courtesy of NationalSwitchgear.com
GEK
-
100682
From
3
to
5
times
the
pickup
TOC
:
s
0.746
*
Dial
-
5.360
TP
_
0.01
From
5
to
20
times
the
pickup
TOC
:
uvn
*
Dial
T
=
0.00085
-
12.530
pO
.
OOOOl
-
1
From
20
to
31
times
the
pickup
TOC
:
T
=
250
-
4.5
P
*
Dial
10
where
:
T
-
time
in
seconds
P
=
rhultiple
of
pickup
TOC
Dial
“
Time
Dial
Setting
for
5
A
rated
(
0.5
-
10
)
10
=
Time
Dial
Setting
for
1
A
rated
(
0.05
-
1
)
INSTANTANEOUS
UNIT
*
Any
time
a
dip
switch
is
changed
,
the
Ready
LED
begins
to
flash
twice
per
second
.
If
the
settings
are
returned
to
their
previous
positions
,
or
if
the
relay
is
initialized
by
holding
the
reset
lever
for
three
(
3
)
seconds
,
the
Ready
LED
will
stop
flashing
but
remain
lit
.
If
the
relay
settings
are
changed
and
the
relay
is
not
reset
,
it
will
continue
to
flash
for
three
(
3
)
minutes
,
then
it
will
accept
the
new
settings
and
self
-
initialize
.
The
times
-
pickup
-
TOC
measurement
obtained
is
compared
,
independently
for
each
phase
and
for
ground
,
with
a
user
-
set
value
,
and
if
the
user
-
set
value
is
exceeded
,
a
Pickup
LED
is
lit
on
the
front
of
the
relay
and
a
user
-
programmable
timer
is
started
.
When
the
timer
times
out
,
the
relay
trips
and
a
Trip
LED
is
lit
on
the
front
of
the
relay
.
The
trip
level
is
user
-
adjustable
independently
for
phase
and
ground
.
Likewise
,
the
timer
can
be
programmed
,
independently
for
phase
and
ground
,
between
0.0
and
1.55
seconds
,
in
50
-
millisecond
steps
.
7
&
The
instantaneous
unit
can
be
disabled
by
setting
the
trip
value
multiplier
to
zero
(
0
)
.
Pickup
current
setting
changes
take
effect
immediately
,
altering
the
TOC
and
IOC
elements
,
and
could
cause
the
relay
to
trip
;
this
is
unlike
other
types
of
changes
,
where
the
flashing
of
the
Ready
LED
indicates
that
a
change
has
been
made
but
not
yet
finalized
.
Initializing
the
relay
by
pressing
the
reset
lever
will
return
the
Ready
LED
to
an
ON
condition
.
CHANGING
SETTINGS
Settings
can
be
changed
by
dip
switches
on
the
front
of
the
relay
.
Once
the
desired
changes
are
made
,
the
relay
has
to
be
initialized
,
accomplished
by
depressing
the
reset
lever
for
three
(
3
)
seconds
until
the
Ready
LED
goes
out
,
Initialization
is
12
Courtesy of NationalSwitchgear.com
GEK
-
100682
m
SETTINGS
PICKUP
TOC
TIME
DIAL
The
pickup
is
the
sum
of
the
switches
in
the
right
-
hand
position
,
plus
the
base
pickup
.
For
example
,
if
the
second
,
third
,
and
fifth
phase
TOC
switches
are
in
the
right
-
hand
position
,
the
pickup
current
on
a
5
A
-
rated
relay
would
be
the
base
of
1.5
,
+
0.75
+
1.5
+
6
=
9.75
amperes
.
The
time
dial
is
the
sum
of
the
switches
in
the
right
hand
position
plus
the
base
.
05
or
.
5
.
The
time
dial
calibration
is
0.05
for
lA
-
rated
relays
and
0.5
for
5
A
-
rated
relays
.
©
PICKUP
IOC
The
IOC
pickup
is
the
sum
of
the
switches
in
the
right
-
hand
position
times
the
TOC
pickup
.
For
example
,
if
the
second
and
third
switches
are
in
the
right
-
hand
position
,
the
IOC
pickup
would
be
2
+
4
=
6
times
the
TOC
settingf
using
the
9.75
amperes
set
above
,
this
would
result
in
an
IOC
pickup
of
58.5
amperes
.
CURVE
SELECTION
Eight
curves
can
be
selected
by
means
of
the
three
(
3
)
curve
-
selection
switches
.
The
settings
are
as
follows
:
Third
(
Bottom
)
right
Second
(
Middle
)
right
right
First
(
Top
)
lnverse
/
(
BS
142
)
Inverse
*
Very
Inverse
Long
Time
Inverse
Extremely
Inverse
2
Second
Definite
4
Second
Definite
6
Second
Definite
8
Second
Definitel
right
right
right
right
left
m
n
left
left
m
left
right
right
>
,
•
right
right
left
left
left
right
left
left
left
left
left
*
For
one
-
amp
models
the
INVERSE
curve
is
defined
by
BS
142
.
The
time
delay
of
the
definite
time
curve
is
the
range
times
the
time
dial
for
1
A
relays
and
the
range
times
the
time
dial
divided
by
10
for
5
A
relays
.
For
example
,
to
obtain
a
3
-
second
operating
time
,
the
time
dial
would
be
set
first
,
third
,
and
fourth
switches
to
the
right
and
second
and
fifth
switches
to
the
left
(
TD
=
base
of
.
05
,
+
.
05
+
.
2
+
,
2
=
.
5
[
1
A
]
,
or
base
of
.
5
,
+
,
5
+
2
+
2
=
5
[
5
A
]
)
;
the
6
-
sccond
curve
would
be
chosen
with
the
curve
switches
left
,
left
,
right
;
the
time
delay
is
6
(
curve
)
times
.
5
(
time
dial
)
,
=
3
seconds
for
1
amp
relays
.
For
5
A
relays
,
the
time
dial
(
5
)
is
divided
by
10
,
=
.
5
,
therefore
it
will
also
result
in
a
3
-
second
delay
.
in
the
right
-
hand
position
.
For
example
,
if
only
the
third
and
fifth
switches
are
in
the
right
-
hand
position
,
the
delay
would
be
.
2
+
.
8
-
1
second
.
COMMUNICATIONS
ADDRESS
The
address
for
the
communications
port
is
set
via
three
rotary
switches
on
the
rear
of
the
cradle
unit
.
A
setting
of
000
indicates
no
communications
card
is
installed
and
disables
the
breaker
-
status
display
.
If
breaker
status
is
desired
and
there
is
no
communications
card
installed
,
any
address
other
than
000
or
999
may
be
set
.
See
Figure
19
.
!
IOC
DELAY
The
Instantaneous
unit
can
be
delayed
by
.
05
to
1.55
seconds
.
The
time
delay
is
the
sum
of
the
switches
m
NOTE
:
All
MDP
’
s
with
RS
232
or
RS
485
protocol
will
respond
to
address
001
,
13
Courtesy of NationalSwitchgear.com
GEK
-
100682
In
the
A
position
on
the
nameplate
,
IOC
phase
and
ground
trips
are
output
on
studs
11
,
12
and
14
,
15
,
and
TOC
phase
and
ground
trips
are
output
on
studs
11
,
13
and
14
,
16
.
OUTPUT
CONTACT
CONFIGURATION
The
MDP
relay
has
two
output
contacts
that
can
be
configured
,
by
means
of
the
output
selection
switch
,
allowing
the
user
to
distinguish
either
between
phase
and
ground
,
or
between
time
delay
and
instantaneous
.
In
the
B
position
on
the
nameplate
,
IOC
or
TOC
ground
trips
are
output
on
studs
11
,
13
,
and
14
,
16
,
and
IOC
or
TOC
phase
trips
are
output
on
studs
11
,
12
and
14
,
15
.
OUTPUT
SELECT
I
.
B
CONTACT
IOC
or
TOC
Phase
IOC
or
TOC
Ground
IOC
or
TOC
Phase
IOC
or
TOC
Ground
IOC
Kla
11
-
12
TOC
11
-
13
K
2
a
IOC
Klb
14
-
15
TOC
K
2
b
14
-
16
DISPLAY
AND
RESET
The
MDP
relays
are
provided
with
a
seven
-
segment
display
,
which
can
be
scrolled
without
removing
the
cover
,
by
pushing
the
reset
lever
.
Phase
A
current
multiples
for
the
last
trip
Phase
B
current
multiples
for
the
last
trip
Phase
C
current
multiples
for
the
last
trip
Ground
current
multiples
at
the
last
trip
Operating
time
for
the
last
trip
F
5
F
6
F
7
Upon
energizing
the
relay
,
a
value
appears
on
the
display
that
indicates
the
relay
state
.
In
order
to
differentiate
this
from
the
"
rest
of
the
information
,
it
appears
with
the
two
decimal
points
illuminated
.
The
values
displayed
indicate
:
F
8
F
9
Last
trip
data
,
F
5
to
F
9
,
is
retained
,
provided
auxiliary
power
is
maintained
.
With
only
a
two
-
digit
display
,
the
maximum
operating
time
that
can
be
directly
displayed
is
99
seconds
.
When
the
time
exceeds
99
seconds
,
the
MDP
relay
begins
again
from
zero
(
0
)
with
both
decimal
points
lit
to
indicate
the
initial
100
units
.
If
the
time
exceeds
199
seconds
,
the
display
stays
lit
with
tire
figure
99
and
both
decimal
points
lit
.
Equipment
in
Service
Internal
settings
are
different
from
the
external
settings
Fatal
flaw
Breaker
closed
Breaker
open
.
0.0
.
0.1
80
CL
OP
Pushing
the
reset
lever
for
less
than
two
(
2
)
seconds
advances
through
a
sequence
of
data
.
This
sequence
When
the
reset
lever
is
pressed
for
less
than
2
seconds
,
the
next
function
appears
on
the
display
.
If
,
for
example
,
the
phase
A
current
is
showing
on
the
display
and
the
lever
is
pushed
,
F
2
appears
,
which
indicates
the
next
function
,
and
the
moment
the
lever
is
released
,
the
display
will
show
the
value
of
this
function
,
which
is
the
B
phase
current
multiples
.
is
:
F
0
Current
Breaker
status
(
open
,
closed
)
F
1
Phase
A
current
,
in
multiples
of
pickup
F
2
Phase
B
current
,
in
multiples
of
pickup
F
3
Phase
C
current
,
in
multiples
of
pickup
F
4
Ground
current
,
in
multiples
of
pickup
If
the
lever
is
held
for
more
than
3
seconds
,
the
In
-
Service
LED
goes
out
and
the
relay
initializes
itself
.
The
display
shows
the
status
function
.
14
Courtesy of NationalSwitchgear.com
i
GEK
-
100682
m
specified
on
the
order
.
The
printed
circuit
boards
are
mounted
behind
the
nameplate
and
can
be
accessed
by
removing
the
four
screws
securing
the
nameplate
.
The
boards
are
mounted
horizontally
in
guides
.
The
relay
can
only
be
initialized
if
the
input
current
is
below
pickup
.
If
it
has
picked
up
,
or
has
tripped
and
the
fault
persists
,
the
display
will
show
the
actual
function
when
the
lever
is
released
,
and
it
will
not
initialize
.
If
the
reset
lever
has
not
been
pressed
for
more
than
two
(
2
)
minutes
,
phase
A
current
appears
on
tire
display
.
INTERNAL
CONNECTION
DIAGRAM
An
internal
connection
diagram
for
the
MDP
is
shown
in
Figure
6
.
SELF
TEST
AND
ERROR
ROUTINES
DISPLAYS
When
the
MDP
relay
detects
a
critical
failure
of
one
of
its
components
,
it
immediately
gives
a
fatal
error
order
and
disables
the
trip
outputs
.
In
this
case
,
the
relay
program
is
put
in
a
DO
loop
,
from
which
it
cannot
exit
until
power
is
removed
and
the
relay
re
-
energized
.
Locally
,
the
Ready
LED
goes
out
and
the
state
of
the
relay
is
indicated
by
an
"
80
"
on
the
display
,
flashing
once
per
second
.
The
MDP
relay
has
eight
Light
-
Emitting
Diodes
(
LEDs
)
at
the
top
of
the
front
of
the
relay
in
order
to
indicate
the
following
situations
:
-
Ready
.
A
green
LED
indicates
that
the
relay
is
in
operation
.
-
Pickup
.
An
amber
LED
indicates
that
one
of
the
protection
units
has
picked
up
.
The
first
thing
the
MDP
relay
does
when
powered
is
to
perform
a
complete
check
of
the
EPROM
.
If
any
error
is
detected
,
a
Fatal
Error
output
is
given
.
-
Phase
A
trip
.
A
red
LED
indicates
that
the
A
phase
unit
has
produced
a
trip
.
Once
in
operation
,
partial
EPROM
checks
are
made
.
If
any
one
of
these
checks
gives
an
error
signal
,
the
relay
goes
to
Fatal
Error
status
.
-
Phase
B
trip
.
A
red
LED
indicates
that
the
B
phase
unit
has
produced
a
trip
.
-
Phase
C
trip
.
A
red
LED
indicates
that
the
C
phase
unit
has
produced
a
trip
.
The
MDP
relay
incorporates
a
WATCHDOG
TIMER
monitoring
system
for
the
program
.
CONSTRUCTION
-
Ground
Trip
.
A
red
LED
indicates
that
the
ground
unit
has
produced
a
trip
.
The
components
of
the
relay
are
mounted
on
a
cradle
assembly
feat
can
easily
be
removed
from
fee
relay
case
.
The
cradle
is
locked
in
fee
case
by
latches
at
the
top
and
bottom
.
The
electrical
connections
between
the
case
blocks
and
fee
cradle
blocks
are
completed
through
removable
connection
plugs
,
as
shown
in
Figure
12
,
to
permit
testing
fee
relay
in
its
case
.
The
cover
is
attached
to
fee
front
of
the
case
and
includes
two
interlocking
arms
that
prevent
the
cover
from
being
restored
until
fee
connection
plugs
have
been
inserted
.
The
case
is
suitable
for
semi
-
flush
mounting
on
panels
.
Hardware
is
available
for
all
panel
thicknesses
up
to
two
inches
(
2
"
)
.
A
panel
thickness
of
1
/
8
inch
will
be
assumed
unless
otherwise
LED
combinations
-
Single
Phase
and
Ground
red
LED
indicates
phase
to
ground
fault
.
-
Two
Phase
red
LEDs
indicate
Phase
to
Phase
fault
.
-
Three
Phase
red
LEDs
indicate
Three
Phase
fault
.
-
Three
Phase
and
Ground
red
LEDs
indicate
three
phase
to
ground
fault
.
#
-
TOC
Trip
,
A
red
LED
indicates
that
fee
TOC
element
has
produced
a
trip
.
i
-
IOC
Trip
.
A
red
LED
indicates
that
the
IOC
element
has
produced
a
trip
.
©
15
Courtesy of NationalSwitchgear.com
GEK
-
100682
RECEIVING
,
HANDLING
,
AND
STORAGE
ELECTRICAL
TESTS
I
This
relay
contains
electronic
components
that
could
be
damaged
by
electrostatic
discharge
currents
if
those
currents
flow
thr
ough
certain
terminals
of
the
components
.
The
main
source
of
electrostatic
discharge
currents
is
the
human
body
,
and
the
conditions
of
low
humidity
,
carpeted
floors
and
isolating
shoes
are
conducive
to
the
generation
of
electrostatic
discharge
currents
.
IN
VERSE
TIME
UNIT
Phase
Pickup
Calibration
Verification
Set
the
switch
on
the
front
of
the
relay
so
the
output
relays
correspond
to
phase
or
ground
(
Position
B
)
.
Connect
the
relay
as
indicated
in
Figure
13
.
In
order
to
apply
current
to
the
relay
,
use
a
supply
of
120
or
220
volts
,
50
/
60
Hz
,
with
a
variable
resistor
in
series
,
or
an
electronic
test
source
,
Where
these
conditions
exist
,
care
should
be
exercised
when
removing
and
handling
the
modules
.
The
persons
handling
the
module
should
make
sure
that
their
body
charge
has
been
discharged
,
by
touching
some
surface
at
ground
potential
,
before
touching
any
of
the
components
on
the
modules
,
Set
the
relay
at
the
desired
pickup
TOC
and
disable
the
instantaneous
unit
by
setting
tire
instantaneous
multiplier
to
zero
(
0
)
.
These
relays
,
when
not
included
as
part
of
a
control
panel
,
will
be
shipped
in
cartons
designed
to
protect
them
against
damage
.
Immediately
upon
receipt
of
a
relay
,
examine
it
for
any
damage
sustained
in
transit
.
If
damage
resulting
from
handling
is
evident
,
file
a
damage
claim
at
once
with
the
transportation
company
and
promptly
notify
the
nearest
General
Electric
Sales
Office
.
Apply
current
to
the
relay
and
verify
that
the
Pickup
LED
on
die
front
of
the
relay
lights
between
100
%
and
110
%
of
the
pickup
TOC
setting
,
and
that
the
trip
relay
closes
tiiereafter
.
With
the
output
relay
closed
,
reduce
the
current
|
applied
,
verifying
that
at
a
value
between
95
%
and
105
%
of
the
pickup
TOC
,
the
relay
resets
,
and
the
Pickup
LED
turns
off
.
t
,
*
The
relays
should
be
stored
in
their
original
cartons
.
If
the
relays
are
not
to
be
installed
immediately
,
they
should
be
stored
indoors
in
a
place
that
is
free
from
moisture
,
dust
and
metallic
chips
.
Verification
of
Operating
Time
With
the
relay
still
connected
as
indicated
in
Figure
13
,
set
the
inverse
-
time
unit
to
minimum
pickup
and
set
the
corresponding
time
dial
to
5
on
a
5
A
relay
,
or
0.5
on
a
1
A
relay
.
ACCEPTANCE
TESTS
Immediately
upon
receipt
of
die
relay
,
an
inspection
and
acceptance
test
should
be
made
to
make
sure
that
no
damage
has
been
sustained
in
shipment
,
and
that
the
relay
calibrations
have
not
been
disturbed
.
Successively
apply
currents
of
2
,
5
,
and
10
times
pickup
TOC
at
a
minimum
,
verifying
that
the
operating
times
are
within
the
margins
indicated
in
Tables
1
,
2
,
3
,
and
4
.
VISUAL
INSPECTION
Check
the
nameplate
stamping
to
make
sure
that
die
model
number
and
rating
of
the
relay
agree
widi
the
requisition
.
Remove
die
relay
from
its
case
and
check
that
there
are
no
broken
or
cracked
molded
parts
or
other
signs
of
physical
damage
,
and
that
all
screws
are
tight
.
i
16
Courtesy of NationalSwitchgear.com
GEK
-
100682
TABLE
1
INVERSE
CHARACTERISTIC
Operating
Times
for
ANSI
Curve
,
in
Seconds
Operating
Times
for
BS
142
Inverse
Times
Pickup
2
4.28
-
4.73
1.93
-
2.13
1.32
-
1.45
0.49
-
0.55
0.21
-
0.25
0.15
-
0.18
5
10
TABLE
2
VERY
INVERSE
CHARACTERISTIC
Times
Pickup
Operating
Times
for
Curve
,
in
Seconds
8.03
-
8.87
1.43
-
1.58
0.77
-
.
85
2
5
10
TABLE
3
LONG
TIME
INVERSE
CHARACTERISTIC
Times
Pickup
Operating
Times
for
Curve
,
in
Seconds
44.8
-
49.5
19.3
-
21.3
11.7
-
12.9
2
5
10
*
’
TABLE
4
EXTREMELY
INVERSE
CHARACTERISTIC
Times
Pickup
Operating
Times
for
Curve
,
in
Seconds
8.24
-
9.11
1
,
02
-
1.13
0.30
-
0.33
2
:
10
For
the
Definite
Time
Characteristics
,
based
on
any
current
input
,
the
time
should
be
half
of
the
maximum
value
.
Verification
of
Time
Dial
Set
the
relay
at
the
minimum
pickup
TOC
and
verify
that
with
an
input
current
of
five
times
(
5
x
)
pickup
TOC
,
the
operating
time
is
between
the
margins
shown
in
Tables
5
and
6
.
TABLE
5
INVERSE
TIME
Curve
Time
in
Seconds
Long
Time
Very
Inv
,
Extremely
ANSI
Inv
.
Inverse
BS
142
4.08
-
4.51
2.86
-
3.16
1.24
-
1.37
0.42
-
0.47
Inverse
38.6
-
42.7
27
.
-
29.9
11.6
-
12.9
3
,
86
-
4.27
1
Time
Dial
Time
Dial
-
Time
Dial
-
Time
Dial
=
10
(
1
)
2.02
-
2.23
1.42
-
1.57
0
,
62
-
0.69
APPX
.
0.24
3.84
-
4.24
2.69
-
2.98
1.16
-
1.29
APPX
.
0.41
2.84
-
3.14
2.00
-
2.20
0.86
-
0.96
APPX
.
0.31
7
(
0.7
)
3
(
0.3
)
1
(
0.1
)
17
Courtesy of NationalSwitchgear.com
GEK
-
100682
TABLE
6
DEFINITE
TIME
i
Time
in
Seconds
Curve
Tmax
.
=
4
sec
.
3.95
-
4.05
2.75
-
2
,
85
1.14
-
1.26
APPX
.
0.4
Tmax
.
-
6
sec
.
Tmax
,
=
8
sec
.
7.95
-
8.05
5.55
-
5.65
2.35
-
2.45
0.76
-
0.86
Tmax
.
-
2
sec
5.45
-
5.05
4.15
-
4.25
1.71
-
1.89
0.57
-
0.67
10
(
1
)
1
,
95
-
2
,
05
1.35
-
1.45
0.57
-
0.63
APPX
.
0.2
Time
Dial
=
Time
Dial
=
Time
Dial
-
Time
Dial
=
7
(
0.7
)
3
(
0.3
)
1
(
0.1
)
INSTANTANEOUS
UNIT
GROUND
UNIT
Repeat
each
test
with
the
relay
connected
as
in
Figure
13
,
except
apply
current
to
the
ground
unit
(
terminals
7
and
8
)
.
For
each
test
,
apply
ground
settings
to
the
relay
as
instructed
.
Verification
of
Pickup
Set
the
Output
Select
switch
on
the
front
of
the
relay
to
the
B
position
so
the
output
relays
correspond
to
phase
or
ground
,
MDP
-
LINK
SOFTWARE
Connect
the
relay
as
'
indicated
in
Figure
13
.
Use
a
supply
voltage
with
a
variable
resistor
in
series
,
or
use
an
electronic
test
source
.
Set
the
relay
at
the
minimum
pickup
TOC
.
Set
the
instantaneous
unit
to
one
times
(
1
x
)
the
pickup
TOC
setting
.
Set
the
instantaneous
time
delay
to
zero
(
0
)
seconds
.
OVERVIEW
This
section
contains
information
for
the
use
of
MDP
-
LINK
software
,
A
personal
computer
(
PC
)
,
along
with
MDP
-
LINK
,
will
provide
a
remote
man
-
machine
interface
to
the
relay
for
operating
personnel
.
This
interface
is
available
in
two
different
serial
communications
protocols
(
RS
232
and
RS
485
)
.
To
determine
if
your
MDP
contains
this
interface
check
the
following
table
:
I
Apply
current
to
the
relay
hnd
verify
that
the
Pickup
LED
lights
and
the
output
trip
relay
closes
when
the
current
is
between
95
%
and
105
%
of
the
pickup
TOC
setting
.
Model
Number
Protocol
With
the
trip
output
contact
closed
,
lower
the
applied
current
,
verifying
that
the
trip
relay
resets
and
that
the
Pickup
LED
turns
off
at
a
current
value
equal
to
or
greater
than
95
%
of
the
pickup
value
.
MDP
4
XXXXXXCA
RS
232
MDP
5
XXXXXXCA
RS
485
X
=
Don
'
t
Care
SYSTEM
REQUIREMENTS
Verification
of
Operating
Time
i
Hardware
With
the
relay
still
connected
as
in
Figure
11
,
apply
a
current
of
5
times
(
5
x
)
the
pickup
TOC
setting
,
verifying
that
the
operating
time
is
less
than
0.025
seconds
.
The
minimum
PC
hardware
requirements
consists
of
An
IBM
-
AT
or
the
following
components
,
compatible
(
Compaq
,
Zenith
,
Tandy
,
etc
.
.
.
)
with
one
parallel
port
,
a
minimum
of
500
K
bytes
of
free
memory
(
RAM
)
to
run
the
program
in
,
40
MB
hard
drive
,
low
density
3
1
/
2
inch
floppy
drive
,
and
EGA
monitor
,
Set
the
time
delay
of
the
instantaneous
unit
and
verify
that
it
is
never
less
than
the
set
time
,
nor
greater
than
the
set
time
+
10
milliseconds
.
I
18
Courtesy of NationalSwitchgear.com
GEK
-
100682
©
See
Figures
20
and
21
for
proper
wiring
of
PC
to
MDP
.
If
the
menu
is
not
visible
just
below
the
highlighted
item
on
the
menu
bar
use
the
DOWN
ARROW
key
to
display
the
menu
.
Software
Pull
-
Down
Menus
Requires
MSDOS
(
PCDOS
)
3
,
1
or
above
for
the
PC
operating
system
.
Pull
-
down
menu
items
are
selected
in
a
number
of
ways
:
INSTALLATION
Mouse
©
Copy
all
files
from
the
distribution
diskette
to
your
hard
drive
,
using
the
DOS
copy
command
.
Position
the
mouse
cursor
on
top
of
the
menu
item
then
press
the
left
button
once
and
release
it
(
hereafter
known
as
clicking
on
the
mouse
button
)
to
display
the
pull
-
down
menu
.
If
the
user
'
wishes
to
select
an
item
in
the
pull
-
down
menu
,
position
the
mouse
over
the
desired
item
and
click
on
the
left
mouse
button
.
GENERAL
OPERATION
Mouse
/
Keyboard
Usage
Either
the
mouse
or
the
keyboard
can
be
used
to
access
all
items
in
menus
,
dialog
boxes
and
list
boxes
.
For
a
description
of
how
to
use
the
mouse
and
keyboard
in
the
various
boxes
and
menus
,
refer
to
the
following
sections
for
menus
and
dialog
boxes
.
For
full
manipulation
of
graphical
data
,
the
mouse
is
required
.
The
mouse
is
used
to
access
items
in
menus
and
dialog
boxes
by
moving
the
cursor
to
the
item
,
followed
by
pressing
and
then
releasing
the
left
mouse
button
(
clicking
)
.
Both
may
be
done
at
once
by
positioning
the
cursor
over
the
menu
item
on
the
menu
bar
and
holding
the
left
mouse
button
down
,
moving
the
mouse
cursor
to
the
desired
entry
and
the
releasing
the
mouse
button
.
9
Keyboard
"
Activating
the
hot
key
"
is
the
combination
of
holding
the
ALT
key
and
striking
the
highlighted
key
.
Using
a
hot
key
will
activate
the
associated
menu
or
dialog
box
.
If
there
is
no
hot
key
for
a
desired
menu
item
,
use
the
UP
and
DOWN
ARROW
keys
to
highlight
the
desired
item
,
then
press
the
ENTER
key
.
Pressing
the
ENTER
key
will
activate
the
associated
menu
or
dialog
box
.
Main
Horizontal
Menu
Bar
Items
in
the
main
horizontal
menu
are
selected
in
one
of
three
ways
:
Dialog
Boxes
Position
the
mouse
cursor
on
top
of
the
menu
item
and
click
the
left
button
.
1
.
Dialog
boxes
are
generally
characterized
by
a
title
bar
,
a
grey
box
,
and
OK
and
CANCEL
buttons
.
The
dialog
box
cannot
be
moved
,
resized
,
or
iconized
.
In
addition
,
when
a
dialog
box
is
displayed
,
the
user
can
only
access
items
in
the
dialog
box
,
not
any
other
items
on
the
screen
.
Use
a
hot
key
.
The
hot
key
is
the
combination
of
the
ALT
key
and
the
letter
that
is
highlighted
in
the
item
description
(
blue
)
.
2
.
Once
either
of
the
above
methods
has
been
used
to
select
an
item
on
the
menu
,
indicated
by
one
item
being
highlighted
,
the
RIGHT
and
LEFT
ARROW
keys
can
be
used
to
go
to
adjacent
menu
items
.
3
.
If
an
item
in
the
dialog
box
lias
a
title
with
a
highlighted
character
(
blue
in
the
default
color
scheme
)
,
the
user
can
access
this
item
from
the
keyboard
by
using
the
ALT
key
with
the
highlighted
character
(
the
hot
key
)
.
©
19
Courtesy of NationalSwitchgear.com
GEK
-
100682
To
operate
the
scroll
bar
with
the
mouse
,
place
the
tip
of
the
pointing
arrow
cursor
in
the
gray
hatched
area
,
or
on
the
arrow
'
s
at
the
top
and
bottom
of
the
scroll
bar
and
click
on
the
left
mouse
button
.
If
the
mouse
arrow
cursor
is
in
the
grey
hatched
area
,
then
the
contents
of
the
list
box
will
move
a
section
at
a
time
.
If
the
mouse
cursor
is
on
one
of
the
arrows
at
the
top
or
bottom
,
the
contents
of
the
list
box
will
move
one
line
at
a
time
.
Holding
down
the
mouse
button
will
cause
the
movement
to
be
repeated
until
the
mouse
button
is
released
.
Items
in
a
dialog
box
can
also
be
accessed
from
the
keyboard
by
using
the
cursor
keys
:
UP
/
DOWN
/
LEFT
/
RIGHT
ARROW
keys
,
PAGE
UP
/
DOWN
keys
and
the
TAB
/
SHIFT
TAB
keys
.
In
any
dialog
box
the
TAB
key
will
move
sequentially
in
one
direction
,
or
the
SHIFT
TAB
key
in
the
opposite
direction
,
selecting
items
in
the
dialog
box
with
each
keystroke
.
The
other
cursor
keys
will
generally
move
within
a
selected
item
.
Buttons
in
the
dialog
box
can
be
accessed
from
the
keyboard
by
using
the
UP
/
DOWN
ARROW
keys
,
the
TAB
/
SHIFT
TAB
keys
,
or
if
the
button
has
a
highlighted
character
,
the
hot
key
.
If
the
buttons
require
the
user
to
make
a
selection
,
the
selection
is
made
by
using
the
ENTER
key
.
<
Once
the
desired
item
can
be
seen
,
click
on
the
item
with
the
left
mouse
button
to
select
it
.
Once
an
item
has
been
selected
it
will
be
highlighted
.
To
operate
the
scrolling
of
the
list
box
with
the
keyboard
,
use
the
PAGE
UP
/
DOWN
keys
to
move
the
contents
of
the
list
box
a
section
at
a
time
and
the
UP
/
DOWN
ARROW
keys
to
move
the
contents
one
line
at
a
time
,
Holding
down
the
keys
will
cause
the
movement
in
the
list
box
to
repeat
until
the
key
is
released
.
To
exit
from
the
dialog
box
and
clear
it
from
the
screen
,
the
user
selects
either
the
OK
button
or
the
CANCEL
button
.
The
mouse
can
be
used
to
select
these
buttons
by
moving
the
mouse
cursor
over
the
button
and
clicking
the
left
mouse
button
,
addition
,
the
keyboard
can
be
used
to
select
these
buttons
by
using
their
hot
keys
.
The
hot
key
for
the
OK
button
is
ALT
-
0
and
the
hot
key
for
the
CANCEL
button
is
ALT
-
C
.
In
Once
the
desired
item
can
be
seen
,
use
the
UP
/
DOWN
ARROW
keys
to
select
it
.
The selected
item
is
the
highlighted
one
.
h
*
The
mouse
can
be
used
to
select
any
item
in
a
dialog
box
by
moving
the
cursor
with
the
mouse
to
tire
desired
item
and
clicking
on
it
with
the
left
mouse
button
.
The
following
table
lists
the
valid
keys
and
their
fiuictions
for
list
boxes
:
Move
up
one
selection
.
Move
down
one
selection
.
Move
up
one
page
of
selections
.
Move
down
one
page
of
selections
.
Move
to
the
first
selection
.
Move
to
the
last
selection
.
Accept
the
current
selection
and
exit
the
list
box
.
Exit
the
list
box
without
making
a
selection
.
UP
ARROW
DOWN
ARROW
The
OK
button
accepts
the
selection
(
s
)
made
by
the
user
and
allows
the
program
to
use
these
selections
.
The
CANCEL
button
does
not
accept
the
selections
made
by
the
user
and
thus
the
program
uses
the
previous
selections
.
Any
highlighted
button
can
be
selected
by
striking
the
ENTER
key
.
PAGE
UP
PAGE
DOWN
I
HOME
List
Boxes
END
A
list
box
is
another
box
within
a
dialog
box
that
lists
all
choices
for
an
item
in
the
dialog
box
(
for
example
,
a
list
of
file
names
)
.
If
tire
list
of
available
entries
is
longer
than
the
displayed
list
box
,
the
list
box
has
a
vertical
scroll
bar
that
allows
the
user
to
scroll
through
the
list
.
RETURN
ALT
-
X
20
Courtesy of NationalSwitchgear.com
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