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S3 PROTECTION
ACCELERATIO SETTI GS
Acceleration Timer Function
Block 1
Block 2
Block 3
LOGIC OPERA DS
Starting
Running
MOTOR SETTI G
Enable Two Speed Motor
CO TACT I PUT OPERA D
High Speed Switch
CO TACT I PUT OPERA D
Remote Reset
KEYPAD OPERA D
Reset
RTD protection
6–110
Figure 35: Acceleration logic diagram
= Enabled
AND
OR
OR
AND
= Enabled
AND
OR
As an option, a CANBUS-based RMIO module can be installed on the 339, which can
monitor up to 12 RTDs (100 Ohm Platinum), each of which may be configured to have a trip
temperature and an alarm temperature. The RTD protection setpoints can be seen only if
the 339 has the RMIO module installed and validated. The alarm temperature is normally
set slightly above the normal running temperature. The trip temperature is normally set at
the insulation rating. Trip Voting has been added for extra security in the event of RTD
malfunction. If enabled, a second RTD must also exceed the trip temperature of the RTD
being checked before a trip will be issued. If the RTD is chosen to vote with itself, the voting
feature is disabled.
Each RTD may also be configured as being of application type Stator, Bearing, Ambient or
Other. The table below lists RTD resistance versus temperature. RTDs configured as Stator
type are also used by the thermal model for determining the RTD Bias.
If for some reason, communications with the RMIO module are lost or interrupted, the 339
will issue an RMIO MISMATCH self-test error indicating the failure. This feature is useful as it
ensures that the remote RTDs are being continuously monitored.
PATH:
SETPOINTS > S3 PROTECTION > RTD PROTECTION > RTD #1(12)
RTD #1 to 12 APPLICATION
Range: None, Stator, Bearing, Ambient, Other
Default: None
Sets the application type.
SYSTEM SETUP SETTI G
Switching Device
ACCELERATIO SETTI G
Output Relay 4
ACCELERATIO SETTI G
Output Relay 5
ACCELERATIO SETTI G
0
D
Output Relay 6
1 s
LATCH
Clk
ACCELERATIO SETTI G
t
= ACCELERATION TIMER
pu
t
pu
AND
0
2 SPD MOTOR SETTING
t
= ACCEL T ON STOPPED
pu
t
pu
AND
0
2 SPD MOTOR SETTING
t
= ACCEL T ON LOW SPD
pu
t
pu
AND
0
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
= Breaker
CO TACT OUTPUT
AND
Output Relay 4
= Enabled
CO TACT OUTPUT
= Enabled
AND
Output Relay 5
CO TACT OUTPUT
= Enabled
AND
Output Relay 6
TARGET MESSAGE
Acceleration Trip
LOGIC OPERA D
Acceleration Protection Op
Any Trip Op
OR
S
NV
LATCH
R
Set Dominant
896810.cdr
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