Programming; Suggested Settings - SymCom 601 Installation Instructions Manual

PROGRAMMING

1. Select the feature to program by rotating the "MODE SELECT" switch to the desired position.
2. Push and hold the "RESET / PROGRAM" button.
3. Rotate the "DISPLAY / PROGRAM" adjustment to the desired setting of the feature as shown in the
LED display.
4. Release the "RESET / PROGRAM" button. The Model 601 is programmed when the button is released.
5. Continue steps 1-4 until all features are programmed.

SUGGESTED SETTINGS

LV/HV- The recommended settings for "LV" (low voltage) and "HV" (high voltage) depend on many
factors such as motor usage, motor size, environmental factors and tolerance of the motor.
The motor manufacturer should be consulted for "HV" and "LV" settings. However, the NEMA
MG1 standard recommends that "LV" and "HV" be set to no more than ±10% of the motor's
nameplate voltage. The setting can be determined by multiplying the motor's nameplate voltage
by the recommended percent over and under voltage. (eg., The motor nameplate voltage is
230 V, set "LV" to 0.9x230=207, set "HV" to 1.10x230=253) "LV" can not be set higher than
"HV", so "HV" may have to be adjusted higher before the proper "LV" setting can be programmed.
VUB- "VUB" is the voltage unbalance trip point. The NEMA MG1 standard does not recommend
operating a motor above a 1% voltage unbalance without derating the motor. Voltage unbalance
is determined from the following formula:
% Voltage Unbalance = [(Maximum Deviation from the Average) / Average] x 100%
The NEMA MG1 standard also recommends against operating a motor above a 5% voltage
unbalance under any circumstances. Therefore, a setting of "5" is a good place to start but
SymCom recommends consulting the motor manufacturer for specific tolerances.
Note: A setting of "999" in this position will eliminate voltage unbalance protection.
Single phase protection is still active for unbalances in excess of 15%.
LF- "LF" setting is the Low Frequency Trip threshold. The NEMA MG1 standard recommends
against operating a motor on a supply with more than ±5% variation in frequency.
On a 60Hz system, 60 x .95 = 57Hz.
5/03
(Consult the Motor Manufacturer for their recommendations.)
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