CHAPTER 2: INTRODUCTION
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
2–3
FIGURE 2–2: Protection Features
Fault diagnostics are provided through pretrip data, event record, trace memory, and
statistics. Prior to issuing a trip, the 469 takes a snapshot of the measured parameters and
stores them with the cause of the trip. This pre-trip data may be viewed using the
MENU
key, viewing the
TARGET MESSAGES
before the trip is reset, or by accessing the
A1 STATUS
LAST TRIP DATA
actual values. The 469 event recorder stores up to 256 time and date
stamped events including the pre-trip data. Each time a trip occurs, the 469 stores a trace
of 8 cycles pre-trip and 8 cycles post-trip for all measured AC quantities. Trip counters
record the number of occurrences of each type of trip. Minimum and maximum values for
analog inputs, along with maximum values for RTDs, are also recorded. These features
enable the operator to pinpoint a problem quickly and with certainty.
Power metering included with the 469 as a standard feature. The table below outlines the
metered parameters available either through the front panel or communications ports.
51
Overload
86
Overload Lockout
66
Starts/Hour & Time Between Starts
R
estart Block (
A
nti-Backspin Timer)
50
Short
C
ircuit & Short
C
ircuit Backup
Mechanical Jam
3
7
32
Undercurrent/Underpower
R
everse Power
4
6
C
urrent Unbalance
50
G/
51
G
Ground Fault & Ground Fault Backup
8
7
D
ifferential
A
cceleration
49
Stator
R
T
D
38
Bearing
R
T
D
Other
R
T
D
&
A
mbient
R
T
D
Open
R
T
D A
larm
Short/Low
R
T
D
2
7/
5
9
Undervoltage/Overvoltage
47
Phase
R
eversal
81
Frequency
R
eactive Power
55
/7
8
Power Factor
A
nalog Input
D
emand
A
larm:
A
kW kvar kV
A
S
R
4
6
9 Self-Test
,
Service
Trip
C
oil Supervision
Welded
C
ontactor
Breaker Failure
R
emote Switch
1
4
Speed Switch & Tachometer Trip
Load Shed Switch
Pressure Switch
Vibration Switch
1
9
R
educed Voltage Start
4
8
Over Torque
R
emote Start/Stop
P
R
O
C
TL
A5
.
CDR
Incomplete Sequence (
R
educed Voltage Start)
Forced
R
elay Operation
Summary of Contents for Masoneilan 469 Series
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