Siemens MCC-3298 - Manual (Page 34)

32
3 Operating the SAMMS-LV Device
F4 - Full-Load Current for Overload Relay #1
1. Press the LIST key to view the active full-load current setting
for overload relay #1. The setting should normally be the full
load current as shown on the motor nameplate (high speed
for two-speed machine). The range of possible settings and
the factory default value depend on the size displayed in F2
as follows:
Overload
Relay Size
Setting
Range
Step Default
1A 0.3 - 1.5A 0.1A 0.3A
1B 1.2 - 6.0A 0.1A 1.2A
1C 4.8 - 24.0A 0.1A 4.8A
2A 10 - 36A 1A 10A
2B 10 - 45A 1A 10A
3 20 - 90A 1A 20A
4 40 - 135A 1A 40A
5 80 - 270A 1A 80A
6 160 - 540A 2A 160A
2. To change the setting, you must be in program mode.
3. Press the UP or DOWN key to scroll through the range of
settings until the selected setting appears.
4. Press the ENTER key to change the active setting to the
selected value. The display becomes blank while you hold
down the ENTER key, and the SAMMS-LV device stores the
new setting. (If you make an incorrect selection, repeat
steps 3 and 4).
5. To exit the program mode, press and hold the (F)unction key
for several seconds. The display will show “Prog.” Press the
UP or DOWN key to change to the display mode.
6. Press the (F)unction key to step through to another function.
F4A - 5A CT Primary Current Selection for Overload
Relay #1
SAMMS-LV is normally used with SAMMS sensors to provide
the current input signals to the device. Optionally, SAMMS-LV
may be used with conventional 5A secondary current trans-
formers.
1. Press the LIST key to view the sensor in use for overload
relay #1. If standard SAMMS sensors are used, the display
will read “OFF.” If 5A secondary CT’s are in use, the CT
primary current will be displayed.
2. To change the setting, you must be in program mode.
3. Press the UP or DOWN key to scroll through the range of
settings, until the selected setting appears on the display.
4. Press the ENTER key to change the active setting to the
selected setting. The display becomes blank while you hold
down the ENTER key and the SAMMS-LV device stores the
new setting.
5. To exit the program mode, press and hold the (F)unction key
for several seconds. The display will show “Prog.” Press the
UP or DOWN key to change to the display mode.
6. Press the (F)unction key to step through to another function.
F5 - Full-Load Current for Overload Relay #2
(SAMMS-LVX Only)
1. Press the LIST key to view the active full-load current setting
for overload relay #2. This setting should normally be the full
load current for the low speed shown on the motor name-
plate. The range of possible settings and the factory default
value depend on the size displayed in F3. The values are
similar to those found in the table in the procedure for F4. If
the control is not a two-speed control, OFF appears on the
display, and UP, DOWN and ENTER keys become disabled.
2. To change the setting, you must be in program mode.
3. Press the UP or DOWN key to scroll through the range of
settings until the selected setting appears.
4. Press the ENTER key to change the active setting to the
selected value. The display becomes blank while you hold
down the ENTER key, and the SAMMS-LVX device stores
the new setting. (If you make an incorrect selection, repeat
steps 3 and 4).
5. To exit the program mode, press and hold the (F)unction key
for several seconds. The display will show “Prog.” Press the
UP or DOWN key to change to the display mode.
6. Press the (F)unction key to step through to another function.
F5A - 5A CT Primary Current Selection for Overload
Relay #2 (SAMMS-LVX Only)
SAMMS-LV is normally used with SAMMS sensors to provide
the current input signals to the device. Optionally, SAMMS-LV
may be used with conventional 5A secondary current trans-
formers.
1. Press the LIST key to view the sensor in use for overload
relay #2. If standard SAMMS sensors are used, the display
will read “OFF.” If 5A secondary CT’s are in use, the CT
primary current will be displayed.
2. To change the setting, you must be in program mode.
3. Press the UP or DOWN key to scroll through the range of
settings, until the selected setting appears on the display.
4. Press the ENTER key to change the active setting to the
selected setting. The display becomes blank while you hold
down the ENTER key and the SAMMS-LVX device stores
the new setting.
5. To exit the program mode, press and hold the (F)unction key
for several seconds. The display will show “Prog.” Press the
UP or DOWN key to change to the display mode.