Delta 23-730 Specifications Page 15

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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Contact Technical Services at (800) 377-4384 with any questions.
Fax-on-Demand: (877) 888-9329, Document #: 8412
15
Operation on Motor Loads
Because of the current-limiting effect described above, special attention
should be given to motor applications. In general, the regulator must have a
load rating nearly equal to the maximum power drawn during the starting
cycle. This may run from two to either times the normal (running) rating of the
motor. In doubtful cases, it is advisable to measure the actual starting
current.
Servicing
No Routine Maintenance Necessary
Because the Sola Micro/Minicomputer Regulator is a simple, rugged device
without moving parts or manual adjustments, no routine servicing or
maintenance is needed. In the event of apparent poor performance, check
the following points immediately:
A.
Nominal Voltage Too High
1.
The load may be considerably less than full rating.
(See: Load Regulation”, page 13).
2.
The load may have a leading power factor.
B.
Nominal Voltage Too Low
1.
Load power factor may be lagging.
2.
Unit may be slightly overloaded. (See Current Limitation”, page 14).
C.
Does Not Regulate Closely
1.
Unit may be slightly overloaded. (See Current Limitation”, page 14).
2.
Actual line voltage swings may be outside the rated range of unit,
particularly on low side.
3.
On varying loads, a certain amount of load regulation may be
mixed with the line voltage regulating action. (See “Load
Regulation”, page 13).
D.
Output Voltage Very Low
1.
Unsuspected or unplanned overloads of substantial size may occur
intermittently (motor-starting currents, solenoid inrush currents, etc.).
(See “Current Limitation”, page 14).
2.
One or more capacitor units in regulator may be defective.
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