50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Operating & Service Instructions
Sola Minicomputer Regulators
UL White Card Listed – Power Supply Classification
CSA Certified – Transformer Classification
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
General Description and Specifications
The Sola Micro/Minicomputer regulator provides voltage regulation and
isolation from both transverse and common mode noises for any type of load.
It also suppresses transients, protects from overloads and serves as a
portable dedicated line. It is the ultimate in AC power conditioning equipment.
Two types of units are manufactured. Hardwired units, rated 125 to 1500VA,
should be permanently installed by competent electricians. Portable units,
rated 150 to 2000VA, are designed for office type environments and have a
low 43dB sound level.
Operating Temperature Range:
-20°C to + 50°C
Phase:
Single
Input Voltage (Hardwired Models):
Refer to Table 4
Input Voltage (Portable Models):
220/240 VAC
Output Voltage (Hardwired models): 110/120/220/240 VAC
Output Voltage (Portable models):
220 or 240 VAC, switch selectable*
Output Voltage Regulation:
+/-5% for an input line variation
of +/-15%.
Output Harmonic Distortion:
Less than 3% total RMS content at
full load with rated input voltage
Efficiency:
85% at full load.
Dropout:
No loss of output for line loss of
3msec.
Common Mode Noise Rejection:
Greater than 120dB
Transverse Mode Noise Rejection:
Greater than 60dB
Safety Approvals:
Designed and built per VDE 0550
and 0806. Specifications
(compatible with IEC 380/435)
* The unit must not be powered while operating this switch. Unplug the unit
from the power source before using this switch.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Safety Notice
High voltages are present inside all regulators. Do not reach inside a unit
when it is energized. To measure voltage, de-energize the unit, connect the
meter, and then re-energize the unit.
Hardwired Units
Installation – Mechanical
Table 1 shows the physical dimensions of the hardwired units. These units
can be mounted with the “This Side Up” designation upwards, or they can be
mounted horizontally. Allow 60cm above and 30cm on either side of the
regulator during installation.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Table 1. Hardwired Regulator Dimensions
VA
Catalog
Number
Outline
Drawing
Dim.
A
(cm)
Dim.
B
(cm)
Dim.
C
(cm)
Dim.
D
(cm)
Approx.
Shipping
Weight (kg)
125
63-23-612-8
A
23,11
18,90
11,43
13,67
8,08
250
63-23-625-8
A
26,92
18,90
11,43
13,67
12,24
500
63-23-650-8
A
33,66
16,21
19,69
22.86
18,14
1000
63-23-710-8
A
45,57
16,21
19,69
22,86
28,12
2000
63-23-720-8
B
44,65
23,72
26,82
32,38
50,81
3000
63-23-730-8
B
67,72
23,81
26,90
32,38
72,59
5000
63-23-750-8
B
76,20
23,81
26,90
32,38
109,79
7500
63-23-775-8
C
71,12
23,81
62,23
65,55
176,94
10000 63-23-810-8
C
76,20
23,81
62,23
65,55
220,50
15000 63-28-815-8
*
76,20
23,81
91,44
97,15
349,35
VA
Catalog
Number
Outline
Drawing
Dim.
E
(cm)
Dim.
F
(cm)
Dim.
G
(cm)
Dim.
H
(cm)
Approx.
Shipping
Weight (kg)
125
63-23-612-8
A
12,07
10,48
5,53
0,79 X 1,75
8,08
250
63-23-625-8
A
12,07
10,48
5,53
0,79 X 1,75
12,24
500
63-23-650-8
A
20,64
14,30
9,12
0,79 X 2,06
18,14
1000
63-23-710-8
A
20,64
14,30
14,83
0,79 X 2,06
28,12
2000
63-23-720-8
B
29,84
10,69
12,70
1,12 X 1,75
50,81
3000
63-23-730-8
B
29,84
15,39
9,29
1,12 X 1,75
72,59
5000
63-23-750-8
B
29,84
23,79
9,37
1,12 X 1,75
109,79
7500
63-23-775-8
C
63,02
18,71
9,37
1,12 X 1,75
176,94
10000 63-23-810-8
C
63,02
23,80
9,37
1,12 X 1,75
220,50
15000 63-28-815-8
*
94,56
23,80
9,37
1,42 X 1,75
349,35
• Same as (c), but is a triplex assembly.
Note: Dimension C includes heat shield around core for all units
except 125, 250 and 500VA, which have no shield.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Figure 1:
Hardwired Regulator Dimensions (Refer to Table 1).
Knockout locations are typical.
Outline A
Outline B
Outline C
Table 2 shows the recommended bolt size for mounting the hardwired units.
Table 2. Bolt Sizes
Rated VA
of Unit
125/250
500/1000
1500 to 10000
150000
Minimum Recommended Size
of Steel Mounting Hardware
M6
M7
M8
M12
Portable Units
Installation – Mechanical
These units may be installed in any protected environment. Allow 60 cm
above and 30 cm on either side of the installation. Dimensions of the portable
regulators are given in Table 3.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Table 3. Portable Regulator Dimensions
VA
Dim. A
(cm)
Dim. B
(cm)
Dim. C
(cm)
Approx.
Shipping
Weight (kg)
63-13-625-9
250
33,66
19,56
17,93
15,5
63-13-650-9
500
41,27
21,60
21,59
20,0
63-13-710-9
1000
41,27
21,60
21,59
28,63
63-13-720-9
2000
41,91
27,94
26,34
53,18
Catalog
Number
Figure 2: Dimensions - Portable Regulators (Refer to Table 3)
Hardwired Models
Installation – Electrical
These regulators may be jumpered for different input and output voltages.
The terminal block is at the top of the unit in units 2kVA and smaller.
Larger units (3kVA and up) have the terminal block located in the capacitor
compartment. Table 4 gives the proper jumper configurations for needed
input and output voltages. Figure 3 shows the schematic diagrams of the
units.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Table 4. Wire and Jumper Configurations
Unit
(VA)
250 to 5000
Input
Volts
Input
Terminals
90-130
H1-H4
180-260
H1-H4
(H2-H3)
310-450
H1-H5
(H2-H3)
180-260
H1-H5
(H1-H3)
(H2-H5)
310-450
H1-H4
(H2-H3)
180-260
H1-H4
(H2-H3)
H1-H5
(H2-H3)
7500
10000 to
15000
Jumper
Connection
(H1-H3)
(H2-H4)
Output
Connection
(All Models)
110-X1-X2 or X2-X3
120 X4-X2 or X2-X5
220-X1-X3
240 X4-X5
Figure 3. Hardwired Unit Schematic
Table 5 shows recommended wire gauges and fusing for the units. However,
this table is not meant to supercede local and national wiring codes and
standards. Make certain to adhere to local and national code requirements.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Table 5. Recommended Wire Gauges and Fusing
Catalog
Number
Rated
Volts
63-23-612-8
63-23-625-8
63-23-650-8
63-23-710-8
63-23-720-8
63-23-730-8
63-23-750-8
110-120
220-240
380-415
110-120
220-240
380-415
110-120
220-240
380-415
110-120
220-240
380-415
110-120
220-240
380-415
110-120
220-240
380-415
110-120
220-240
380-415
Min. Gauge
Req. Circuit
Protection
90°C Wire
(In Amps,
(In Cross
Fast-Blow Fuse) Sectional mm2)
3
1,0
1.5
1,0
0,8
1,0
6
1,0
3
1,0
1
1,0
10
1,5
6
1,0
3
1,0
15
2,5
10
1,5
6
1,0
30
6,0
15
2,5
10
1,5
45
16,0
25
4,0
15
2,5
80
25,0
40
10,0
20
4,0
Rated
Volts
Min. Gauge
90°C Wire
(In Cross
Sectional mm2)
110/120
220/240
1,0
1,0
110/120
220/240
1,0
1,0
110/120
220/240
1,0
1,0
110/120
220/240
1,5
1,0
110/120
220/240
4,0
1,5
110/120
220/240
6,0
2,5
110/120
220/240
16,0
4,0
63-28-775-8
220-240
380-415
60
30
16,0
6,0
110/120
220/240
25,0
10,0
63-28-810-8
220-240
380-415
80
40
25,0
10,0
110/120
220/240
35,0
16,0
63-28-815-8
220-240
380-415
110
60
50,0
16,0
110/120
220/240
45,0
25,0
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Other Considerations for Hardwired Units
Three Phase Operation
If operation from a three phase source is required, three hardwired regulators
may be wired in delta as shown in Figure 4.
Note
Required branch circuit protection must be located in the primary of each
regulator, not in the three phase line. The outputs must supply three
independent single phase loads of the same voltage rating. Do not connect
loads phase to phase when the three phase configuration is used.
Multiple Operation
Two or more hardwired models of the same rating may be connected with
their input and output in parallel. However, on models smaller than 5kVA,
do not parallel both 220VCT (X1-X2-X3) and 240VCT (X4-X2-X5). This may
damage the output windings.
Input Power Switch
Because the regulators include resonant circuitry that is energized whether
or not the unit is serving a load, it is very desirable to install a disconnect
switch in the primary circuit.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Figure 4. Three Phase Connections
A: Isolated, Single Phase Loads
B: Separate, Single Phase Loads in Grounded Wye
*Connect per Table 4
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Installation-Electrical
Portable Regulators
These units are equipped with one input off/on switch and one three-wire,
earthing-type input cord. The installer must add the plug ends required for
use. Figure 5 shows the portable regulators schematically. Color codes for
the supplied line cords are as follows:
Brown- Hot
Blue- Neutral
Green/Yellow – Earth
Or
Black- Hot
White- Neutral
Green- Earth
Figure 5. Portable Regulator Schematics
250-1000 VA (250 VA has two outlets)
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
2000 VA
There is a switch on the front of the portable regulators that allows the
selection of either 220 or 240VAC output.
Note
The unit must not be powered while operating this switch. Unplug the unit
from the power source before using this switch.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Physical Characteristics of Operation – All Units
Operating Temperature
Standard units are designed to operate in ambient temperatures of -20°C
to +50°C. In operation, a temperature rise will occur whether or not the
transformer is serving a load. Normally, this rise may fall anywhere in the
range of 45-100°C. depending on the regulator type and rating. In any case,
the maximum operating temperature at an ambient of 50°C is always within
safe operating limits.
Magnetic Fields
In almost all applications, this effect may be disregarded. In certain
applications, care should be exercised in the orientation of the core with
respect to critical circuits, in order to minimize the effect in the field.
Electrical Characteristics of Operation – All Units
Checking with Voltmeters
All checks on output voltages should be made with a true RMS voltmeter.
Rectifier type voltmeters will not give accurate readings due to the small
amount of output harmonics present.
Load Regulation
Changes in output voltages resulting from changes in resistive loads from no
load to full load (at a 100% power factor) are approximately four percent.
Effect of Load Power Factor
The median value of output voltage will vary from the nameplate rating if the
load has a power factor other than that for which the regulator was designed.
Load regulation will also be greater as the inductive load power factor is
decreased. However, the resulting median values of output voltage will be
regulated against supply line changes at any reasonable load or load power
factor.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Use with Switchmode Power Supplies
If a CVS transformer is used as a source for a switchmode power supply, a
slight amount of ringing may be noticed on the sinewave output of the CVS at
half cycle intervals for a short duration. This ringing occurs at the point when
the switchmode power supply current demand drops to zero. The ringing
should not be a cause for concern since it is of relatively low magnitude and
frequency. The CVS has been tested with a variety of switchmode power
supplies and it has been determined that the ringing never affects the DC
outputs, nor does it degrade the components of any switchmode power
supply.
Effect of Temperature
The output voltage will show a small change as the unit warms up to stable
operating temperatures at a constant ambient temperature. This change may
be about one or two percent depending on the unit’s VA rating. At a stable
operating temperature, the output voltage will change slightly with varying
ambient temperature. This shift is approximately one percent for each 40°C
of temperature change.
Response Time
Transient changes in supply voltage are usually corrected within 1-1/2 cycles
or less; the output voltage will not fluctuate more than a few percent.
Input Characteristics
The regulator transformer includes a resonant circuit that is energized
whether it is serving a load or not. Therefore, the input current at no load is
approximately 35% of the full-load primary current. Input power factor will
average 90-100% at full load but may drop to about 75% at half load and
25% at no load. In any case, it is always leading.
Current Limitation
When the load is increased beyond the regulator’s rated value, a point is
reached where the output voltage suddenly collapses and will not regain its
normal value until the load is partially released. Under short-circuit
conditions, the load current is limited to approximately 150% of the rated
full-load value and the input power to less than 10% of normal. The regulator
will protect both itself and its load against damage from excessive fault
currents. Fusing of load circuits is not necessary.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
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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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
E. No Output Voltage
1. Check power source beakers or fuses.
2. Check input switch (on portable units).
3. Check continuity between input terminals, and also between output
terminals.
F. Transformer Operating Temperature
1. The transformer used in these regulators is designed to operate at
high flux density, and hence, relatively high temperatures. After
connection to line for a half- hour or so, the transformer core
structure may be too hot to touch with the bare hand. This is normal
and should not be a concern.
Note
In case the regulator is operating but does not appear to have the correct
output, it is very helpful to apply the following test:
1. Disconnect the working load.
2. Connect a dummy load of lamps, heaters, or other resistive load
substantially equal to the full-load rating of regulator, directly across
its output terminals.
3. Measure the output voltage of the regulator using a true RM type
voltmeter directly across its output terminals.
This test will usually establish whether the apparent poor performance is due
to a fault in the regulator or to some peculiarity of the working load.
Factory Test and Inspection
If the field test suggested earlier indicated that the regulator itself may be
faulty, a full report of the difficulty should be communicated to the place of
purchase. The Authorized Sola/Hevi-Duty Distributor may then suggest
further helpful field tests or authorize return for inspection at once. A Return
Authorization Number will be issued. This Number must appear on the
outside of the shipping container, otherwise the shipment will not be
accepted.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Field Replacement of Capacitors
Capacitors used in all regulators are of the highest commercial
grade. Nevertheless, there is a certain small percentage of failure. The
Sola/Hevi-Duty limited warranty includes free replacement of any capacitor
unit that fails within five years of sale. Older units can be replaced for a
moderate charge.
Where component technical help is available, it may be possible to test and
identify defective capacitors in the field, and to make field replacement with
new capacitors. In all such cases, advice and cooperation must be requested
in advance.
Warranties
Sola/Hevi-Duty warrants its standard catalog products to be free from
defects in materials and workmanship and agrees to correct by repair or
replacement, at the option of Sola/Hevi-Duty, products that may fail in service
provided the product has been installed, operated and maintained in
accordance with accepted industry practice.
Warranty begins at the date of manufacture and is according to the following
schedule:
1. Standard catalog transformer and single phase, power conditioning
products – 10 years plus an additional 2 years if the registration
card enclosed with the transformer is completed and returned to
Sola/Hevi-Duty within 14 days after installation.
2. Products manufactured to a purchaser's specifications – 1 year.
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50 Hz Mini/Micro
Computer Regulator (MCR) Series
Installation and Operation Manual
Return Policy
Most instances of initial failure to operate properly can be remedied through
a telephone conversation between the user and Technical Service. If it is
determined that a product must be returned, contact your local Sola/HeviDuty distributor for a Return Authorization. If the distributor is unknown,
contact Customer Service at (800) 377-4384 for instructions.
All returns to the Sola/Hevi-Duty factory must have a Return Authorization
(R.A.#). The following information required for a Return Authorization (R.A.#):
1.
2.
3.
4.
5.
Sola catalog number and/or model number.
Serial number.
Company name, address, phone number and contact person.
Proof of purchase from Distributor.
Description of problem.
For proper handling upon receipt at Sola/Hevi-Duty, the R.A.# must
be clearly placed in several locations on the outside of the package.
Sola/Hevi-Duty is not responsible for damage on returned goods not
packaged properly or customer-abused units.
SOLA – The Power Quality Experts
Toll-Free (800) 377-4384
FAX: (800) 367-4384
www.sola-hevi-duty.com
P/N 272-37066-01 REV. 02 8/99
G: literature/manuals/50HzMCR.doc
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