AVR
DIGITAL VOLTAGE STABILISERS
2009
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
1
Founded in 1950, ITALFARAD SpA is specialised in manufacturing electrical
capacitors for A.C. general applications, such as lighting, motor run, Power Factor
Correction.
ITALFARAD also produces L.V. fixed and automatic P.F.C. equipment and voltage
stabilisers .
In 1993, ITALFARAD was awarded a Quality System Certificate according to UNI EN
ISO 9001 Standards, this certificate has been updated to UNI EN ISO 9001:2000.
ITALFARAD have succeeded in obtaining an important share of the world market and
exports to more than 70 Countries all over the world.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
2
VOLTAGE STABILISERS
Index
Page
INTRODUCTION AND TECHNOLOGY
4
ELECTRODYNAMIC VOLTAGE STABILISERS WITH DIGITAL CONTROL
8
MINI AVR Single-phase voltage stabilisers from 0.3kVA up to 150kVA
10
MIDI AVR Three-phase voltage stabilisers from 2kVA up to 450kVA
14
MAXI AVR Three-phase voltage stabilisers from 50kVA up to 3150kVA
22
DIMENSIONS
27
DIAGRAMS
28
ACCESSORIES
32
This document is property of ITALFARAD SpA: it is compulsory to notify the Company Head Office and ask for
authorisation before any release or reproduction. ITALFARAD SpA shall not be held liable or responsible in any way
whatsoever for unauthorised copies, alterations or additions made to the text or to the illustrations of this document. Any
modification concerning the Company logo, symbols of the certifications, nomenclature and official data is strictly
prohibited. For improvement purposes, the Company reserves the right to modify the products described in this
catalogue at any moment without prior notice.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
3
INTRODUCTION & TECHNOLOGY
IMPORTANCE OF VOLTAGE STABILISERS
The increase of voltage sensitive equipment has determined a continuous request for means able to guarantee the
supply of steady voltage independently from mains variation.
Loss of data, defective products, security failure, machinery faults and inaccurate information are only a few examples of
possible problems due to unstable supply.
The voltage stabiliser has proved to be an efficient answer in order to prevent from potential damages due to input
voltage fluctuation.
Installing a voltage stabiliser is often the solution to ensure continuity and quality of production.
USE OF A VOLTAGE STABILISER
A typical voltage stabiliser is able to respond to changes in voltage level called sags (voltage drops) and surges
(voltage peaks) on the input line.
Sags might be due to undersized distribution lines, connection of large loads to the network, ground faults.
Surges might be generated by disconnection of large loads, increased voltage at the generating plant, atmospheric
events.
The duration of such phenomena depends on the cause and is not easily predictable.
Sags are generally more common, especially where the distribution is not wide and efficient.
Other disturbances like spikes, transients, high frequency noise and harmonic distortion have to be treated with the
addition of specific filtering systems.
The good functioning of the majority of electrical and electronic equipment depends on the supply voltage correctness
and steadiness. Nowadays, many industrial and private users are subject to long-lasting fluctuations that can be
inconvenient or even dangerous.
Private
Houses with
High Installed
Industrial
Plants
Laser cutting
machines
Food,
Beverage and
Packaging
Office
machines
Broadcasting
systems
VOLTAGE
STABILISERS
Computers
Electronically
Driven
Machines
Test
equipment
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
4
INTRODUCTION & TECHNOLOGY
COMPARISON WITH A UPS SYSTEM
The kind of utilisation described above pushes towards the choice of a voltage stabiliser instead of a UPS in order to
have:
Lower costs
High power availability
Wider input variation ranges
Overload capacity up to 2In
Inrush current capacity up to 10In
Higher reliability and ruggedness
Absence of batteries and consequent easy storage and handling
Negligible harmonic distortion because of the use of electronic components only in auxiliary circuits
Service continuity
CHOICE OF A VOLTAGE STABILISERS
Generally speaking, a stabiliser can be chosen on the basis of a few elements:
1. NUMBER OF PHASES
2. RATED VOLTAGE
3. INPUT VARIATION RANGE
4. TYPE OF REGULATION
5. RATED POWER
6. INSTALLATION
Once these six points are established, any other optional request can be dealt with separately.
1. Number of phases
The stabiliser number of phases depends on the type of load:
1-phase load: 1-phase stabiliser
Combination of several 1-phase loads or 3-phase loads: 3-phase stabiliser or a 1-phase stabiliser on each load.
3-phase load: 3-phase stabiliser
2. Rated voltage
Always detect the nominal voltages that are supposed to be present at the input and at the output of the stabiliser. In
case of 3-phase systems, provide with the line-to-line voltage value.
Since there are different nominal voltages around the world, do not assume that YOUR nominal voltage is
automatically known.
The standard voltage stabiliser can operate with the following rated voltage:
RATED VOLTAGE
380 V ±15%
(323-380-437)
400V ±15%
(340-400-460)
415 V ±15%
(353-415-477)
VOLTAGE
STABILISER
VOLTAGE
STABILISER
VOLTAGE
STABILISER
380 V ± 0.5%
400 V ± 0.5%
415 V ± 0.5%
by adjusting
the control card
standard setting
by adjusting
the control card
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
5
INTRODUCTION & TECHNOLOGY
3. Input variation range
It‟s a key information for the choice and the design of the stabiliser.
Establish the nature of the oscillation of the input voltage and always keep a safety margin on such percentage. The
standard production can include stabilisers for symmetrical and asymmetrical input variation range. If the input voltage
variation goes beyond the rated range, the difference between real and rated variation is transferred onto the output.
INPUT VOLTAGE WAVEFORM
OUTPUT VOLTAGE WAVEFORM
4. Type of regulation
Three-phase voltage regulation can be performed in two different ways:
independently on each phase. Used for 3-phase loads and 1-phase loads with up to 100% unbalance and
unbalanced input voltage. In this configuration the voltage stabiliser requires the neutral wire.
averaged on the three phases. Used for 3-phase loads and 2-phase loads with maximum 50% unbalance and
balanced input voltage. In this configuration the voltage stabiliser does not require the neutral wire.
INPUT
U1 V1 W1 N
INPUT
U1 V1 W1
STABILISER
STABILISER
1-ph. load
1-ph. load
2-ph. load
1-ph. load
2-ph. load
3-ph. load
3-ph. load
U2 V2 W2 N
OUTPUT
U2 V2 W2
OUTPUT
5. Rated power
Establish the power required to supply your load system and allow for an extra safety margin for possible future
extensions.
A voltage stabiliser power is expressed in kVA (kilovoltamperes), whilst load power is often given in kW (kilowatts). The
link between these two measuring units is provided by the power factor (cosØ):
kVA
kW
cos
Remember that:
kVA = load voltage x load current (single-phase)
kVA =
x phase to phase load voltage x load current (three-phase)
If the power factor or the load power in kW cannot be easily established, measure the absorbed currents in
order to allow for a correct design of the stabiliser.
All the stabilisers are designed for the maximum input current.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
6
INTRODUCTION & TECHNOLOGY
Installation
In order to provide with the best machine, it is recommended to inform about the installation condition. It is necessary to
know:
IP protection degree
Indoor or outdoor installation
Installation site altitude and climatic properties
Ambient temperature
Possible environmental hazards such aggressive atmosphere, exposure to chemical components and so on.
Available Range
The production covers an extensive range of standard types:
Single-phase electrodynamic line from 0.3 kVA up to 150kVA (MINI AVR)
Three-phase electrodynamic line from 2 kVA up to 450kVA (MIDI AVR Y, MIDI AVR A)
Three-phase electrodynamic line from 50 kVA up to 4000kVA (MAXI AVR)
Advantages
Choosing an electromechanical voltage stabiliser means:
Smooth and reliable regulation
Up to ±0.5% output accuracy (electrodynamic stabilisers), up to ±0.3% output accuracy (static stabilisers)
Admitted inrush current up to 10In
Negligible introduction of harmonic distortion
High efficiency
High ratings
Personal Safety
Access to the equipment can only be obtained by opening or dismantling the metal enclosure using appropriate tools:
the protection against direct contact is inherently obtained and complies with IP21 degree.
Inside the equipment there are dangerous voltages.
Access to the components for installation, setting, inspection and maintenance must be granted only to
qualified personnel in charge of it.
The stabiliser must not function without the earth connection.
A circuit breaker should be installed upstream the equipment in accordance with the requirements of IEC364 (CEI 648) “Electrical installations”.
The stabiliser must be used exclusively on the purpose for which it has been designed and built.
Any other utilisation has to be considered as inappropriate and therefore dangerous.
The Company will not to be held liable for possible damages to people, animals and belongings due to incorrect use or
installation.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
7
ELECTRODYNAMIC STABILIZERS
WITH DIGITAL CONTROL
Description of the unit
The stabilising system is designed to operate with rated voltage in accordance with IEC 38 and is expected to be
connected between main power supply and load.
The purpose is to supply the loads a stabilised voltage having an input voltage variable with respect to the rated value.
The highest input current is obtained with the minimum rated voltage; as the output voltage is stabilised within a close
range, the output current is considered to be constant.
Stabilisation takes place on the „rms‟ value of the voltage and is not affected by harmonic distortion in the mains.
The stabiliser can operate with a load variation range from 0 to 100%; the response time depends on the input voltage
percentage variation and on the type of design (indicatively, it can vary between 8 and 80msec/V).
The voltage stabiliser is not affected by the load power factor and since regulation is performed without chopping the
voltage sine wave, neither appreciable harmonic distortion nor phase displacement is introduced on the downstream
line.
The equipment is housed in a metal enclosure with RAL7035 finish and IP21 protection class. Depending on the type,
the stabilisers can be air-cooled (natural or aided convection) or oil-cooled.
When the input variation percentage is –25%, -30% or –45% the unit is provided with a special component (super
capacitor) able to adjust automatically the output voltage to the minimum value after a failure in the mains.
Such device prevents from possible damages to the user due to the potentially high voltages that might occur when the
rated supply is re-established.
Main Components
The main components of the stabiliser are:
1. Buck/boost transformer
The buck/boost transformer is a standard dry-type transformer; the secondary winding is connected in series to the
mains while the primary winding is supplied by the voltage regulator.
2. Voltage regulator
The voltage regulator consists of an autotransformer with continuously variable transformer ratio. The voltage intake
varies depending on the contact position; therefore the voltage supplied to the transformer primary winding also
varies. The voltage across the regulator contacts (and consequently that on the secondary winding of the buck/boost
transformer) is either in phase or in opposition to the supply voltage, and it is therefore added or subtracted to the
supply voltage, thus compensating its variations.
3.
Auxiliary circuit with microprocessor
The DSP microprocessor-based control circuit (specific for fully digital drives) compares the output voltage value to
the adjusted one. When the percentage variation is too high, the control drives the voltage regulator gear motor. By
doing so the regulator rollers change their position thus varying the voltage drawn and supplied to the buck/boost
transformer primary winding.
All the described activities are performed automatically.
The voltage stabiliser can operate with input and output voltages different from the rated voltage. Such setting can be
performed at the factory or at the Customer's premises by adjusting the dip-switch mounted on the electronic control
card within the allowed range and according to the instructions described in the handbook. In the MAXI AVR stabilisers,
such setting can be performed by communicating directly with the microprocessor from a PC (through an RS232
interface). If the rated output voltage differs from the input voltage, a suitable step-up or step-down autotransformer
should be installed in the equipment. However the voltage stabiliser can work just as well after accepting that the range
of input voltage variation is not symmetric.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
8
OPERATING PRINCIPLE
Input
Voltage regulator
Buck-boost
Transformer
N
Standard models:
±15%, ±20%, ±25%, ±30%
+15%/-25%, +15%/-35%, +15%/-45%
Output ±0.5%
A “buck-boost” transformer is connected between input and output.
The voltage on the primary side is determined by the position of the rollers on the regulator
Toroidal and Column Regulator
With rollers and no sliding
(consuming) parts!
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
9
MINI AVR
MINI
AVR
The MINI AVR voltage stabiliser covers the power rating range between 0.3kVA and 150kVA and allows for the choice
of several input voltage variation percentages within a broad range (from +30% up to -45%).
For ±15%, ±20%, ±25 and ±30% range the change of stabilisation is obtained through different internal connections.
Fuses or automatic circuit breakers are provided on the regulation circuit to protect against overload and short circuit on
the voltage regulator. The auxiliary circuit is protected by fuses.
Where provided, a buzzer is activated whenever an overload condition occurs.
In the lower rating types, a pilot light that indicates when the stabiliser is connected to the mains in mounted on the front.
For higher ratings, the stabiliser is provided with a multi-task digital network analyser. Such instrument is able to
provide with information regarding the status of the line downstream the voltage stabiliser such as phase and linked
voltages, current, power factor, active power, apparent power, reactive power, etc.
The logic control is based on a microprocessor.
Mini AVR Standard Features
FREQUENCY
ADMITTED LOAD VARIATION
MAINS WAVEFORM DISTORTION INCREMENT
COOLING
AMBIENT TEMPERATURE
STORAGE TEMPERATURE
RELATIVE HUMIDITY
ADMITTED OVERLOAD
COLOUR
PROTECTION
INSTALLATION
47/65Hz
from 0 to 100%
< 0.2%
Natural Air – Aided Air
-15/+45 °C
-25/+60°C
95%
200% 2min
RAL 7035
IP 21
Indoor
Rating in Relation to the Input Variation Percentage
±15%
±20%
±25%
±30%
-25/+15%
-35/+15%
-45/+15%
1
2.5
5
7
10
15
20
25
35
45
60
75
100
150
0.7
2
4
5
7
10
15
20
25
35
45
60
75
100
0.5
1.5
3
4
5
7
10
15
20
25
35
45
60
75
0.3
1
2
3
4
5
7
10
15
20
25
35
45
60
0.7
2
4
5
7
10
15
20
25
35
45
60
75
100
0.5
1.5
3
4
5
7
10
15
20
25
35
45
60
75
0.3
1
2
3
4
5
7
10
15
20
25
35
45
60
Any other variation range not mentioned in the table above can be dealt with on request
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
10
MINI AVR
MINI
AVR
Mini AVR ±15% Automatic Single-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
MINI AVR 111-15
MINI AVR 113-15
MINI AVR 115-15
MINI AVR 117-15
MINI AVR 119-15
MINI AVR 121-15
MINI AVR 123-15
MINI AVR 125-15
MINI AVR 127-15
MINI AVR 129-15
MINI AVR 128-15
MINI AVR 131-15
MINI AVR 133-15
MINI AVR 135-15
1
2.5
5
7
10
15
20
25
35
45
60
75
100
150
INPUT
MAX
OUTPUT
VOLTAGE
INPUT
VOLTAGE
±15%
CURRENT ±0.5%
[V]
[A]
[V]
230
230
230
230
230
230
230
230
230
230
230
230
230
230
5
12.5
25
35
50
75
102
128
179
230
307
384
511
767
230
230
230
230
230
230
230
230
230
230
230
230
230
230
RATED
OUTPUT EFFICIENCY
[%]
CURRENT
[A]
4
11
22
31
44
65
87
109
152
196
261
326
435
652
>94
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
16
16
16
16
16
16
18
18
18
18
18
18
18
18
12
12
12
13
13
13
23
23
23
23
24
24
25
25
16
23
28
41
47
55
130
140
150
200
320
390
550
650
Mini AVR ±20% Automatic Single-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
MINI AVR 111-20
MINI AVR 113-20
MINI AVR 115-20
MINI AVR 117-20
MINI AVR 119-20
MINI AVR 121-20
MINI AVR 123-20
MINI AVR 125-20
MINI AVR 127-20
MINI AVR 129-20
MINI AVR 128-20
MINI AVR 131-20
MINI AVR 133-20
MINI AVR 135-20
0.7
2
4
5
7
10
15
20
25
35
45
60
75
100
INPUT
MAX
OUTPUT
RATED
VOLTAGE
INPUT VOLTAGE OUTPUT EFFICIENCY
[%]
±20%
CURRENT ±0.5% CURRENT
[V]
[A]
[V]
[A]
230
230
230
230
230
230
230
230
230
230
230
230
230
230
3.8
11
22
28
39
54
81
109
136
190
244
326
407
544
230
230
230
230
230
230
230
230
230
230
230
230
230
230
3
9
17.5
22
31
44
65
87
109
152
196
261
326
435
>94
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
12
12
12
12
12
12
14
14
14
14
14
14
14
14
12
12
12
13
13
13
23
23
23
23
24
24
25
25
16
23
28
41
47
55
130
140
150
200
320
390
550
650
Mini AVR ±25% Automatic Single-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
MINI AVR 111-25
MINI AVR 113-25
MINI AVR 115-25
MINI AVR 117-25
MINI AVR 119-25
MINI AVR 121-25
MINI AVR 123-25
MINI AVR 125-25
MINI AVR 127-25
MINI AVR 128-25
MINI AVR 129-25
MINI AVR 131-25
MINI AVR 133-25
MINI AVR 135-25
0.5
1.5
3
4
5
7
10
15
20
25
35
45
60
75
INPUT
MAX
OUTPUT
RATED
VOLTAGE
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
±25%
CURRENT ±0.5% CURRENT
[V]
[A]
[V]
[A]
230
230
230
230
230
230
230
230
230
230
230
230
230
230
3
9
18
23
29
41
57
87
116
144
203
261
347
435
230
230
230
230
230
230
230
230
230
230
230
230
230
230
2.2
6.5
13
17.5
22
31
43
65
87
108
152
196
261
326
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
10
10
10
10
10
10
11
11
11
11
11
11
11
11
12
12
12
13
13
13
23
23
23
23
24
24
25
25
16
23
28
41
47
55
130
140
150
200
320
390
550
650
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
11
MINI AVR
MINI
AVR
Mini AVR ±30% Automatic Single-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
MINI AVR 111-30
MINI AVR 113-30
MINI AVR 115-30
MINI AVR 117-30
MINI AVR 119-30
MINI AVR 121-30
MINI AVR 123-30
MINI AVR 125-30
MINI AVR 127-30
MINI AVR 128-30
MINI AVR 129-30
MINI AVR 131-30
MINI AVR 133-30
MINI AVR 135-30
0.3
1
2
3
4
5
7
10
15
20
25
35
45
60
INPUT
MAX
OUTPUT
RATED
VOLTAGE
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
±30%
CURRENT ±0.5% CURRENT
[V]
[A]
[V]
[A]
230
230
230
230
230
230
230
230
230
230
230
230
230
230
2
6.2
12.4
18.6
24.8
31
43
61
93
124
156
217
279
372
230
230
230
230
230
230
230
230
230
230
230
230
230
230
1.3
4
9
13.5
18
22
30
43
65
87
109
152
195
261
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
8
8
8
8
8
8
9
9
9
9
9
9
9
9
12
12
12
13
13
13
23
23
23
23
24
24
25
25
16
23
28
41
47
55
130
140
150
200
320
390
550
650
Mini AVR -25%/+15% Automatic Single-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
MINI AVR 111-25/15
MINI AVR 113-25/15
MINI AVR 115-25/15
MINI AVR 117-25/15
MINI AVR 119-25/15
MINI AVR 121-25/15
MINI AVR 123-25/15
MINI AVR 125-25/15
MINI AVR 127-25/15
MINI AVR 128-25/15
MINI AVR 129-25/15
MINI AVR 131-25/15
MINI AVR 133-25/15
MINI AVR 135-25/15
0.7
2
4
5
7
10
15
20
25
35
45
60
75
100
INPUT
MAX
OUTPUT
RATED
VOLTAGE
INPUT VOLTAGE OUTPUT EFFICIENCY
+15%
[%]
CURRENT ±0.5% CURRENT
-25%
[A]
[V]
[A]
[V]
230
230
230
230
230
230
230
230
230
230
230
230
230
230
4
11
23
29
40
58
87
116
145
203
261
348
435
580
230
230
230
230
230
230
230
230
230
230
230
230
230
230
3
8
17
22
30
43
65
87
108
152
195
261
326
435
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
12
12
12
12
12
12
14
14
14
14
14
14
14
14
12
12
12
13
13
13
23
23
23
24
24
24
25
25
17
24
29
42
48
56
140
150
160
210
330
400
500
660
Mini AVR –35%/+15% Automatic Single-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
MINI AVR 111-35/15
MINI AVR 113-35/15
MINI AVR 115-35/15
MINI AVR 117-35/15
MINI AVR 119-35/15
MINI AVR 121-35/15
MINI AVR 123-35/15
MINI AVR 125-35/15
MINI AVR 127-35/15
MINI AVR 128-35/15
MINI AVR 129-35/15
MINI AVR 131-35/15
MINI AVR 133-35/15
MINI AVR 135-35/15
0.5
1.5
3
4
5
7
10
15
20
25
35
45
60
75
INPUT
MAX
OUTPUT
RATED
VOLTAGE
INPUT VOLTAGE OUTPUT EFFICIENCY
+15%
[%]
CURRENT ±0.5% CURRENT
-35%
[A]
[V]
[A]
[V]
230
230
230
230
230
230
230
230
230
230
230
230
230
230
3
10
20
27
33
47
67
100
134
167
234
301
401
501
230
230
230
230
230
230
230
230
230
230
230
230
230
230
2
6
13
17
22
30
43
65
87
108
152
195
261
326
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
10
10
10
10
10
11
11
11
11
11
11
11
11
11
12
12
12
13
13
13
23
23
23
24
24
24
25
25
17
24
29
42
48
56
140
150
160
210
330
400
500
660
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
12
MINI AVR
MINI
AVR
Mini AVR –45%/+15% Automatic Single-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
MINI AVR 111-45/15
MINI AVR 113-45/15
MINI AVR 115-45/15
MINI AVR 117-45/15
MINI AVR 119-45/15
MINI AVR 121-45/15
MINI AVR 123-45/15
MINI AVR 125-45/15
MINI AVR 127-45/15
MINI AVR 128-45/15
MINI AVR 129-45/15
MINI AVR 131-45/15
MINI AVR 133-45/15
MINI AVR 135-45/15
0.3
1
2
3
4
5
7
10
15
20
25
35
45
60
INPUT
MAX
OUTPUT
RATED
VOLTAGE
EFFICIENCY
INPUT
VOLTAGE
OUTPUT
+15%
[%]
CURRENT ±0.5% CURRENT
-45%
[A]
[V]
[A]
[V]
230
230
230
230
230
230
230
230
230
230
230
230
230
230
2.3
8
16
24
31
39
55
79
118
158
197
276
355
474
230
230
230
230
230
230
230
230
230
230
230
230
230
230
1.3
4
8
13
17
22
30
43
65
87
108
152
195
261
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
8
8
8
8
8
9
9
9
9
9
9
9
9
9
12
12
12
13
13
13
23
23
23
24
24
24
25
25
17
24
29
42
48
56
140
150
160
210
330
400
500
660
The technical data in the above tables are subject to change by the Company either for internal reasons or because of a specific request from the Customer
Input output voltage 50Hz: 220/240V - Input output voltage 60Hz: 208/240V
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
13
MIDI
AVR
MIDI AVR A & Y
The MIDI AVR voltage stabiliser covers the power rating range between 2kVA and 450kVA and allows for the choice of
several input voltage variation percentages within a broad range (from +30% up to -45%).
For ±15% and ±20% range, the change of stabilisation is obtained through different internal connections.
The regulation in the MIDI AVR Y stabilisers is independent on each phase. These stabilisers are used with three-phase
loads and single-phase loads with 100% unbalance and unbalanced input rated voltages. In this configuration the
voltage stabiliser requires the neutral wire.
The regulation in the MIDI AVR A stabilisers is performed on the average three-phase voltage. These stabilisers are
used with three-phase loads and two-phase loads with 50% maximum unbalance and balanced input rated voltages. In
this configuration the voltage stabiliser does not require the neutral wire.
Fuses or automatic circuit breakers are provided on the regulation circuit to protect against overload and short circuit on
the voltage regulator.
The auxiliary circuit is protected by fuses.
Where provided, a buzzer is activated whenever an overload condition occurs.
The measuring instrumentation for the MIDI AVR stabilisers mounted on the cabinet door and consists of a multi-task
digital network analyser. Such instrument is able to provide with information regarding the status of the line
downstream the voltage stabiliser such as phase and linked voltages, current, power factor, active power, apparent
power, reactive power, etc.
The logic control is based on a microprocessor.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
14
MIDI AVR A & Y
MIDI
AVR
Midi AVR A Standard Features
47/65Hz
from 0 to 100%
up to 50%
FREQUENCY
ADMITTED LOAD VARIATION
ADMITTED LOAD UNBALANCE
MAINS WAVEFORM DISTORTION INCREMENT
< 0.2%
Aided air
-15/+45 °C
-25/+60°C
95%
200% 2min
RAL 7035
IP 21
Indoor
COOLING
AMBIENT TEMPERATURE
STORAGE TEMPERATURE
RELATIVE HUMIDITY
ADMITTED OVERLOAD
COLOUR
PROTECTION
INSTALLATION
Rating in Relation the Input Variation Percentage
±15%
5
10
15
20
30
45
60
75
105
135
175
230
300
450
±20%
±25%
±30%
-25/+15%
-35/+15%
4
3
2
4
3
7
4
3
7
4
10
7
4
10
7
15
10
7
15
10
20
15
10
20
15
30
20
15
30
20
45
30
20
45
30
60
45
30
60
45
75
60
45
75
60
105
75
60
105
75
135
105
75
135
105
175
135
105
175
135
230
175
135
230
175
300
230
175
300
230
Any other variation range not mentioned in the table above can be dealt with on request.
-45/+15%
2
3
4
7
10
15
20
30
45
60
75
105
135
175
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
15
MIDI AVR A & Y
MIDI
AVR
Midi AVR A ±15% Digital Three-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±15%
[V]
MIDI AVR 333-15
MIDI AVR 335-15
MIDI AVR 337-15
MIDI AVR 339-15
MIDI AVR 341-15
MIDI AVR 343-15
MIDI AVR 345-15
MIDI AVR 347-15
MIDI AVR 349-15
MIDI AVR 351-15
MIDI AVR 353-15
MIDI AVR 355-15
MIDI AVR 357-15
MIDI AVR 359-15
5
10
15
20
30
45
60
75
105
135
175
230
300
450
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
8
16
25
33
50
76
102
126
176
229
297
390
509
765
400
400
400
400
400
400
400
400
400
400
400
400
400
400
7
14
21
28
43
65
87
108
152
195
253
332
433
650
>95
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
16
16
16
16
16
16
18
18
18
18
18
18
18
18
22
22
22
23
23
23
24
24
25
25
25
26
26
50
82
82
109
145
170
190
320
380
460
507
850
930
760
1200
Midi AVR A ±20% Digital Three-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±20%
[V]
MIDI AVR 333-20
MIDI AVR 335-20
MIDI AVR 337-20
MIDI AVR 339-20
MIDI AVR 341-20
MIDI AVR 343-20
MIDI AVR 345-20
MIDI AVR 347-20
MIDI AVR 349-20
MIDI AVR 351-20
MIDI AVR 353-20
MIDI AVR 355-20
MIDI AVR 357-20
MIDI AVR 359-20
4
7
10
15
20
30
45
60
75
105
135
175
230
300
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
7
13
17
26
36
54
81
107
135
187
244
316
415
542
400
400
400
400
400
400
400
400
400
400
400
400
400
400
6
10
14
21
29
43
65
86
108
150
195
253
332
433
>95
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
12
12
12
12
12
12
14
14
14
14
14
14
14
14
22
22
22
23
23
23
24
24
25
25
25
26
26
50
82
82
109
145
170
190
320
380
460
507
850
930
760
1200
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
10
10
10
10
10
10
11
11
11
11
11
11
11
14
22
22
22
23
23
23
24
24
25
25
25
26
26
50
82
82
109
145
170
190
320
380
460
507
850
930
760
1200
Midi AVR A ±25% Digital Three-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±25%
[V]
MIDI AVR 333-25
MIDI AVR 335-25
MIDI AVR 337-25
MIDI AVR 339-25
MIDI AVR 341-25
MIDI AVR 343-25
MIDI AVR 345-25
MIDI AVR 347-25
MIDI AVR 349-25
MIDI AVR 351-25
MIDI AVR 353-25
MIDI AVR 355-25
MIDI AVR 357-25
MIDI AVR 359-25
3
4
7
10
15
20
30
45
60
75
105
135
175
230
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
6
8
13
19
29
38
57
86
115
144
203
260
337
443
400
400
400
400
400
400
400
400
400
400
400
400
400
400
4
6
10
14
22
29
43
65
86
108
152
195
253
332
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
16
MIDI AVR A & Y
MIDI
AVR
Midi AVR A ±30% Digital Three-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±30%
[V]
MIDI AVR 333-30
MIDI AVR 335-30
MIDI AVR 337-30
MIDI AVR 339-30
MIDI AVR 341-30
MIDI AVR 343-30
MIDI AVR 345-30
MIDI AVR 347-30
MIDI AVR 349-30
MIDI AVR 351-30
MIDI AVR 353-30
MIDI AVR 355-30
MIDI AVR 357-30
MIDI AVR 359-30
2
3
4
7
10
15
20
30
45
60
75
105
135
175
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
4
6
8
14
20
31
41
61
93
123
154
217
278
361
400
400
400
400
400
400
400
400
400
400
400
400
400
400
3
4
6
10
14
22
29
43
65
87
108
152
195
253
>96
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
8
8
8
8
8
8
9
9
9
9
9
9
9
9
22
22
22
23
23
23
24
24
25
25
25
26
26
50
82
82
109
145
170
190
320
380
460
507
850
930
760
1200
Midi AVR A –25%/+15% Digital Three-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
+15%
-25%
[V]
MIDI AVR 333-25/15
MIDI AVR 335-25/15
MIDI AVR 337-25/15
MIDI AVR 339-25/15
MIDI AVR 341-25/15
MIDI AVR 343-25/15
MIDI AVR 345-25/15
MIDI AVR 347-25/15
MIDI AVR 349-25/15
MIDI AVR 351-25/15
MIDI AVR 353-25/15
MIDI AVR 355-25/15
MIDI AVR 357-25/15
MIDI AVR 359-25/15
4
7
10
15
20
30
45
60
75
105
135
175
230
300
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
8
13
19
27
39
57
87
116
144
202
260
337
443
578
400
400
400
400
400
400
400
400
400
400
400
400
400
400
6
10
14
22
29
43
65
87
108
152
195
253
332
433
>94
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
12
12
12
12
12
12
14
14
14
14
14
14
14
14
22
22
22
23
23
23
24
24
25
25
25
26
26
50
92
92
119
155
180
210
340
400
480
527
850
930
1100
1400
Midi AVR A –35%/+15% Digital Three-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
+15%
-35%
[V]
MIDI AVR 333-35/15
MIDI AVR 335-35/15
MIDI AVR 337-35/15
MIDI AVR 339-35/15
MIDI AVR 341-35/15
MIDI AVR 343-35/15
MIDI AVR 345-35/15
MIDI AVR 347-35/15
MIDI AVR 349-35/15
MIDI AVR 351-35/15
MIDI AVR 353-35/15
MIDI AVR 355-35/15
MIDI AVR 357-35/15
MIDI AVR 359-35/15
3
4
7
10
15
20
30
45
60
75
105
135
175
230
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
7
9
15
21
33
44
66
100
133
166
234
300
389
511
400
400
400
400
400
400
400
400
400
400
400
400
400
400
4
6
10
14
22
29
43
65
87
108
152
195
253
332
>94
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
10
10
10
10
10
10
11
11
11
11
11
11
11
11
22
22
22
23
23
23
24
24
25
25
25
26
26
50
92
92
119
155
180
210
340
400
480
527
850
930
1100
1400
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
17
MIDI AVR A & Y
MIDI
AVR
Midi AVR A –45%/+15% Digital Three-Phase Voltage Stabiliser
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
+15%
-45%
[V]
MIDI AVR 333-45/15
MIDI AVR 335-45/15
MIDI AVR 337-45/15
MIDI AVR 339-45/15
MIDI AVR 341-45/15
MIDI AVR 343-45/15
MIDI AVR 345-45/15
MIDI AVR 347-45/15
MIDI AVR 349-45/15
MIDI AVR 351-45/15
MIDI AVR 353-45/15
MIDI AVR 355-45/15
MIDI AVR 357-45/15
MIDI AVR 359-45/15
2
3
4
7
10
15
20
30
45
60
75
105
135
175
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
5
8
10
18
25
39
52
79
118
158
196
276
354
460
400
400
400
400
400
400
400
400
400
400
400
400
400
400
3
4
6
10
14
22
29
43
65
87
108
152
195
253
>94
>95
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
8
8
8
8
8
8
9
9
9
9
9
9
9
9
22
22
22
23
23
23
24
24
25
25
25
26
26
50
92
92
119
155
180
210
340
400
480
527
850
930
1100
1400
Midi AVR Y Standards Features
FREQUENCY
ADMITTED LOAD VARIATION
ADMITTED LOAD UNBALANCE
MAINS WAVEFORM DISTORTION INCREMENT
COOLING
AMBIENT TEMPERATURE
STORAGE TEMPERATURE
RELATIVE HUMIDITY
ADMITTED OVERLOAD
COLOUR
PROTECTION
INSTALLATION
47/65Hz
from 0 to 100%
up to 100%
< 0.2%
Aided Air
-15/+45 °C
-25/+60°C
95%
200% 2min
RAL 7035
IP 21
Indoor
Rating in Relation to the Input Variation Percentage
±15%
5
10
15
20
30
45
60
75
105
135
175
230
300
450
±20%
±25%
±30%
-25/+15%
-35/+15%
4
3
2
4
3
7
4
3
7
4
10
7
4
10
7
15
10
7
15
10
20
15
10
20
15
30
20
15
30
20
45
30
20
45
30
60
45
30
60
45
75
60
45
75
60
105
75
60
105
75
135
105
75
135
105
175
135
105
175
135
230
175
135
230
175
300
230
175
300
230
Any other variation range not mentioned in the table above can be dealt with on request.
-45/+15%
2
3
4
7
10
15
20
30
45
60
75
105
135
175
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
18
MIDI AVR A & Y
MIDI
AVR
Midi AVR Y ±15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±15%
[V]
MIDI AVR 444-15
MIDI AVR 446-15
MIDI AVR 448-15
MIDI AVR 450-15
MIDI AVR 452-15
MIDI AVR 454-15
MIDI AVR 456-15
MIDI AVR 458-15
MIDI AVR 460-15
MIDI AVR 462-15
MIDI AVR 464-15
MIDI AVR 466-15
MIDI AVR 468-15
MIDI AVR 470-15
5
10
15
20
30
45
60
75
105
135
175
230
300
450
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
8
16
25
33
50
76
102
126
176
229
297
390
509
765
400
400
400
400
400
400
400
400
400
400
400
400
400
400
7
14
21
28
43
65
87
108
152
195
253
332
433
650
>95
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
16
16
16
16
16
16
18
18
18
18
18
18
18
18
22
22
22
23
23
23
24
24
25
25
26
26
26
50
90
90
110
155
180
200
380
430
490
580
950
1030
860
1300
Midi AVR Y ±20% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±20%
[V]
MIDI AVR 444-20
MIDI AVR 446-20
MIDI AVR 448-20
MIDI AVR 450-20
MIDI AVR 452-20
MIDI AVR 454-20
MIDI AVR 456-20
MIDI AVR 458-20
MIDI AVR 460-20
MIDI AVR 462-20
MIDI AVR 464-20
MIDI AVR 466-20
MIDI AVR 468-20
MIDI AVR 470-20
4
7
10
15
20
30
45
60
75
105
135
175
230
300
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
7
13
17
26
36
54
81
107
135
187
244
316
415
542
400
400
400
400
400
400
400
400
400
400
400
400
400
400
6
10
14
21
29
43
65
86
108
150
195
253
332
433
>95
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
12
12
12
12
12
12
14
14
14
14
14
14
14
14
22
22
22
23
23
23
24
24
25
25
26
26
26
50
90
90
110
155
180
200
380
430
490
580
950
1030
860
1300
Midi AVR Y ±25% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±25%
[V]
MIDI AVR 444-25
MIDI AVR 446-25
MIDI AVR 448-25
MIDI AVR 450-25
MIDI AVR 452-25
MIDI AVR 454-25
MIDI AVR 456-25
MIDI AVR 458-25
MIDI AVR 460-25
MIDI AVR 462-25
MIDI AVR 464-25
MIDI AVR 466-25
MIDI AVR 468-25
MIDI AVR 470-25
3
4
7
10
15
20
30
45
60
75
105
135
175
230
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
6
8
13
19
29
38
57
86
115
144
203
260
337
443
400
400
400
400
400
400
400
400
400
400
400
400
400
400
4
6
10
14
22
29
43
65
86
108
152
195
253
332
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
10
10
10
10
10
10
11
11
11
11
11
11
11
11
22
22
22
23
23
23
24
24
25
25
26
26
26
50
90
90
110
155
180
200
380
430
490
580
950
1030
860
1300
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
19
MIDI AVR A & Y
MIDI
AVR
Midi AVR Y ±30% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±30%
[V]
MIDI AVR 444-30
MIDI AVR 446-30
MIDI AVR 448-30
MIDI AVR 450-30
MIDI AVR 452-30
MIDI AVR 454-30
MIDI AVR 456-30
MIDI AVR 458-30
MIDI AVR 460-30
MIDI AVR 462-30
MIDI AVR 464-30
MIDI AVR 466-30
MIDI AVR 468-30
MIDI AVR 470-30
2
3
4
7
10
15
20
30
45
60
75
105
135
175
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
4
6
8
14
20
31
41
61
93
123
154
217
278
361
400
400
400
400
400
400
400
400
400
400
400
400
400
400
3
4
6
10
14
22
29
43
65
87
108
152
195
253
>96
>96
>97
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
8
8
8
8
8
8
9
9
9
9
9
9
9
9
22
22
22
23
23
23
24
24
25
25
26
26
26
50
90
90
110
155
180
200
380
430
490
580
950
1030
860
1300
Midi AVR Y -25%/+15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
MIDI AVR 333-25/15
MIDI AVR 335-25/15
MIDI AVR 337-25/15
MIDI AVR 339-25/15
MIDI AVR 341-25/15
MIDI AVR 343-25/15
MIDI AVR 345-25/15
MIDI AVR 347-25/15
MIDI AVR 349-25/15
MIDI AVR 351-25/15
MIDI AVR 353-25/15
MIDI AVR 355-25/15
MIDI AVR 357-25/15
MIDI AVR 359-25/15
4
7
10
15
20
30
45
60
75
105
135
175
230
300
INPUT
MAX
OUTPUT RATED
VOLTAGE
INPUT VOLTAGE OUTPUT EFFICIENCY
+15%
[%]
CURRENT ±0.5% CURRENT
-25%
[A]
[V]
[A]
[V]
400
400
400
400
400
400
400
400
400
400
400
400
400
400
8
13
19
27
39
57
87
116
144
202
260
337
443
578
400
400
400
400
400
400
400
400
400
400
400
400
400
400
6
10
14
22
29
43
65
87
108
152
195
253
332
433
>94
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
WEIGHT
CABINET
TIME
[kg]
[ms/V]
12
12
12
12
12
12
14
14
14
14
14
14
14
14
22
22
22
23
23
23
24
24
25
25
26
26
26
50
100
100
120
165
190
220
400
450
510
600
950
1030
1200
1500
Midi AVR Y –35%/+15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
MIDI AVR 444-35/15
MIDI AVR 446-35/15
MIDI AVR 448-35/15
MIDI AVR 450-35/15
MIDI AVR 452-35/15
MIDI AVR 454-35/15
MIDI AVR 456-35/15
MIDI AVR 458-35/15
MIDI AVR 460-35/15
MIDI AVR 462-35/15
MIDI AVR 464-35/15
MIDI AVR 466-35/15
MIDI AVR 468-35/15
MIDI AVR 470-35/15
3
4
7
10
15
20
30
45
60
75
105
135
175
230
INPUT
MAX
OUTPUT RATED
VOLTAGE
RESPONSE
WEIGHT
INPUT VOLTAGE OUTPUT EFFICIENCY
+15%
CABINET
TIME
[%]
[kg]
CURRENT ±0.5% CURRENT
[ms/V]
-35%
[A]
[V]
[A]
[V]
400
400
400
400
400
400
400
400
400
400
400
400
400
400
7
9
15
21
33
44
66
100
133
166
234
300
389
511
400
400
400
400
400
400
400
400
400
400
400
400
400
400
4
6
10
14
22
29
43
65
87
108
152
195
253
332
>94
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
10
10
10
10
10
10
11
11
11
11
11
11
11
11
22
22
22
23
23
23
24
24
25
25
26
26
26
50
100
100
120
165
190
220
400
450
510
600
950
1030
1200
1500
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
20
MIDI AVR A & Y
MIDI
AVR
Midi AVR Y –45%/+15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
+15%
-45%
[V]
MIDI AVR 444-45/15
MIDI AVR 446-45/15
MIDI AVR 448-45/15
MIDI AVR 450-45/15
MIDI AVR 452-45/15
MIDI AVR 454-45/15
MIDI AVR 456-45/15
MIDI AVR 458-45/15
MIDI AVR 460-45/15
MIDI AVR 462-45/15
MIDI AVR 464-45/15
MIDI AVR 466-45/15
MIDI AVR 468-45/15
MIDI AVR 470-45/15
2
3
4
7
10
15
20
30
45
60
75
105
135
175
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
5
8
10
18
25
39
52
79
118
158
196
276
354
460
400
400
400
400
400
400
400
400
400
400
400
400
400
400
3
4
6
10
14
22
29
43
65
87
108
152
195
253
>94
>95
>95
>96
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
8
8
8
8
8
8
9
9
9
9
9
9
9
9
22
22
22
23
23
23
24
24
25
25
26
26
26
50
100
100
120
165
190
220
400
450
510
600
950
1030
1200
1500
MAXI AVR Digital Control
The technical data in the above tables are subject to change by the Company either for internal reasons or because of a specific request from the Customer
Input output voltage 50Hz: 380/415V - Input output voltage 60Hz: 460/480V
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
21
MAXI
AVR
MAXI AVR
The MAXI AVR line covers the range from 50kVA to 3150kVA and allows for the choice of several input voltage variation
percentages within a broad range (from +30% up to -45%).
The MAXI AVR voltage stabilisers are built with independent regulation on each phase.
The MAXI AVR type is used when the grid is unbalanced and when unbalanced three-phase loads and/or single-phase
loads need to be supplied. In this situation, the presence of the neutral wire is required.
The stabilisers are air cooled (natural convection with cabinet internal temperature lower than 40°C).
The measuring instrumentation for the SIRIUS stabilisers is incorporated in a control panel on the cabinet door and
consists of two multi-task digital network analysers. Such instruments are able to provide with information regarding
the status of the lines upstream and downstream the voltage stabiliser, such as phase and linked voltages, current,
power factor, active power, apparent power, reactive power, etc. Said information can also be monitored on a remote
PC via an RS485 output, an RS485/RS232 converter and a special software package supplied with the unit. Pilot lights
are provided for each phase signalling „power on‟, reaching of voltage regulation limits and direction of voltage regulation
(increase/decrease). Alarms for minimum and maximum voltages, maximum current, over-temperature and ventilation
failure are also indicated. The alarm indicators are accompanied by an acoustic alarm.
All these signals (consisting of several LEDs) are located on the control panel mounted on the cabinet door. The
stabiliser is provided with a voltage regulator protection circuit controlled by thermal probes. The circuit works in case of
temporary overload: it opens the connection between the voltage regulator and the buck/boost transformer and shortcircuits the transformer primary winding at the same time.
By doing so, the transformer voltage drop is cancelled and the user can be supplied the mains voltage (although not
stabilised) without interruption.
The auxiliary circuit is protected by fuses.
The logic control, performed on the true rms voltage, is based on a 2-way microprocessor. By using this device,
monitoring the system and setting the stabiliser parameters via a PC connection are made possible.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
22
MAXI AVR
MAXI
AVR
Maxi AVR Standard Features
FREQUENCY
ADMITTED LOAD VARIATION
ADMITTED LOAD UNBALANCE
MAINS WAVEFORM DISTORTION INCREMENT
COOLING
AMBIENT TEMPERATURE
STORAGE TEMPERATURE
RELATIVE HUMIDITY
ADMITTED OVERLOAD
COLOUR
PROTECTION
INSTALLATION
47/65Hz
from 0 up to 100%
up to 100%
< 0.2%
Natural Air (aided over 40°C)
-15/+45 °C
-25/+60°C
95%
200% 2min
RAL 7035
IP 21
Indoor
Rating in Relation to the Input Variation Percentage
±15%
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
4000
±20%
±25%
±30%
-25/+15%
-35/+15%
-45/+15%
100
75
50
100
75
125
100
75
125
100
160
125
100
160
125
200
160
125
200
160
250
200
160
250
200
315
250
200
315
250
400
315
250
400
315
500
400
315
500
400
630
500
400
630
500
800
630
500
800
630
1000
800
630
1000
800
1250
1000
800
1250
1000
1600
1250
1000
1600
1250
2000
1600
1250
2000
1600
2500
2000
1600
2500
2000
3150
2500
2000
3150
2500
Any other variation range not mentioned in the table above can be dealt with on request.
50
75
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
Maxi AVR ±15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±15%
[V]
MAXI AVR 664-15
MAXI AVR 666-15
MAXI AVR 668-15
MAXI AVR 670-15
MAXI AVR 672-15
MAXI AVR 674-15
MAXI AVR 676-15
MAXI AVR 678-15
MAXI AVR 680-15
MAXI AVR 682-15
MAXI AVR 684-15
MAXI AVR 686-15
MAXI AVR 688-15
MAXI AVR 690-15
MAXI AVR 692-15
MAXI AVR 694-15
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
4000
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
212
272
340
425
535
680
850
1071
1361
1700
2125
2720
3400
4250
5355
6800
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
181
231
289
361
455
578
723
910
1156
1445
1806
2312
2890
3613
4552
5780
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
20
20
20
20
20
20
20
20
24
24
24
24
24
24
24
24
40
40
41
41
41
51
51
42
52
52
44
44
44
49
49
60
650
670
900
950
1050
1300
1400
1700
2400
2600
4400
4800
5200
6900
7300
9000
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
23
MAXI AVR
MAXI
AVR
Maxi AVR ±20% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±20%
[V]
MAXI AVR 664-20
MAXI AVR 666-20
MAXI AVR 668-20
MAXI AVR 670-20
MAXI AVR 672-20
MAXI AVR 674-20
MAXI AVR 676-20
MAXI AVR 678-20
MAXI AVR 680-20
MAXI AVR 682-20
MAXI AVR 684-20
MAXI AVR 686-20
MAXI AVR 688-20
MAXI AVR 690-20
MAXI AVR 692-20
MAXI AVR 694-20
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
180
226
289
361
452
569
722
903
1138
1445
1806
2258
2890
3613
4516
5690
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
144
181
231
289
361
455
578
723
910
1156
1445
1806
2312
2890
3613
4552
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
15
15
15
15
15
15
15
15
18
18
18
18
18
18
18
18
40
40
41
41
41
51
51
42
52
52
44
44
44
49
49
60
650
670
900
950
1050
1300
1400
2000
2400
2600
4400
4800
5200
6900
7300
9000
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
12
12
12
12
12
12
12
12
15
15
15
15
15
15
15
15
40
40
41
41
41
51
51
42
52
52
44
44
44
49
49
60
650
670
900
950
1050
1300
1400
1700
2400
2600
4400
4800
5200
6900
7300
9000
Maxi AVR ±25% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±25%
[V]
MAXI AVR 664-25
MAXI AVR 666-25
MAXI AVR 668-25
MAXI AVR 670-25
MAXI AVR 672-25
MAXI AVR 674-25
MAXI AVR 676-25
MAXI AVR 678-25
MAXI AVR 680-25
MAXI AVR 682-25
MAXI AVR 684-25
MAXI AVR 686-25
MAXI AVR 688-25
MAXI AVR 690-25
MAXI AVR 692-25
MAXI AVR 694-25
75
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
144
193
241
308
385
482
607
770
963
1214
1541
1927
2408
3083
3853
4817
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
108
144
181
231
289
361
455
578
723
910
1156
1445
1806
2312
2890
3613
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
24
MAXI AVR
MAXI
AVR
Maxi AVR ±30% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
±30%
[V]
MAXI AVR 664-30
MAXI AVR 666-30
MAXI AVR 668-30
MAXI AVR 670-30
MAXI AVR 672-30
MAXI AVR 674-30
MAXI AVR 676-30
MAXI AVR 678-30
MAXI AVR 680-30
MAXI AVR 682-30
MAXI AVR 684-30
MAXI AVR 686-30
MAXI AVR 688-30
MAXI AVR 690-30
MAXI AVR 692-30
MAXI AVR 694-30
50
75
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
103
155
206
258
330
413
516
650
826
1032
1300
1651
2064
2580
3303
4128
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
72
108
144
181
231
289
361
455
578
723
910
1156
1445
1806
2312
2892
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
>98
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
10
10
10
10
10
10
10
10
12
12
12
12
12
12
12
12
40
40
41
41
41
51
51
42
52
52
44
44
44
49
49
60
650
670
900
950
1050
1300
1400
1700
2400
2600
4400
4800
5200
6900
7300
9000
CABINET
WEIGHT
[kg]
40
40
41
41
41
51
51
42
52
52
44
44
44
49
49
60
715
740
1100
1210
1320
1650
1760
1900
2780
3020
4840
5280
5720
7590
8030
9000
Maxi AVR -25%/+15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
MAXI AVR 664-25/15
MAXI AVR 666-25/15
MAXI AVR 668-25/15
MAXI AVR 670-25/15
MAXI AVR 672-25/15
MAXI AVR 674-25/15
MAXI AVR 676-25/15
MAXI AVR 678-25/15
MAXI AVR 680-25/15
MAXI AVR 682-25/15
MAXI AVR 684-25/15
MAXI AVR 686-25/15
MAXI AVR 688-25/15
MAXI AVR 690-25/15
MAXI AVR 692-25/15
MAXI AVR 694-25/15
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
INPUT
MAX
OUTPUT RATED
VOLTAGE
RESPONSE
INPUT VOLTAGE OUTPUT EFFICIENCY
+15%
TIME
[%]
CURRENT ±0.5% CURRENT
-25%
[ms/V]
[A]
[V]
[A]
[V]
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
192
241
308
385
481
607
770
963
1213
1541
1926
2408
3082
3853
4817
6069
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
144
180
231
289
361
455
578
722
910
1156
1445
1806
2312
2890
3612
4552
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
15
15
15
15
15
15
15
15
18
18
18
18
18
18
18
18
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
25
MAXI AVR
MAXI
AVR
Maxi AVR –35%/+15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
+15%
-35%
[V]
MAXI AVR 664-35/15
MAXI AVR 666-35/15
MAXI AVR 668-35/15
MAXI AVR 670-35/15
MAXI AVR 672-35/15
MAXI AVR 674-35/15
MAXI AVR 676-35/15
MAXI AVR 678-35/15
MAXI AVR 680-35/15
MAXI AVR 682-35/15
MAXI AVR 684-35/15
MAXI AVR 686-35/15
MAXI AVR 688-35/15
MAXI AVR 690-35/15
MAXI AVR 692-35/15
MAXI AVR 694-35/15
75
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
INPUT
VOLTAGE OUTPUT EFFICIENCY
[%]
CURRENT ±0.5% CURRENT
[A]
[V]
[A]
166
222
278
356
444
556
700
889
1111
1400
1778
2223
2779
3557
4446
5558
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
108
144
180
231
289
361
455
578
722
910
1156
1445
1806
2312
2890
3613
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
RESPONSE
TIME
[ms/V]
CABINET
WEIGHT
[kg]
12
12
12
12
12
12
12
12
15
15
15
15
15
15
15
15
40
40
41
41
41
51
51
42
52
52
44
44
44
49
49
60
715
740
1100
1210
1320
1650
1760
1900
2780
3020
4840
5280
5720
7590
8030
9000
CABINET
WEIGHT
[kg]
40
40
41
41
41
51
51
42
52
52
44
44
44
49
49
60
780
805
1200
1320
1440
1800
1920
2100
3060
3340
5280
5760
6240
8280
8760
9000
Maxi AVR –45%/+15% Digital Three-Phase Voltage Stabilisers
TYPE
RATED
POWER
[kVA]
INPUT
VOLTAGE
+15%
-45%
[V]
MAXI AVR 664-45/15
MAXI AVR 666-45/15
MAXI AVR 668-45/15
MAXI AVR 670-45/15
MAXI AVR 672-45/15
MAXI AVR 674-45/15
MAXI AVR 676-45/15
MAXI AVR 678-45/15
MAXI AVR 680-45/15
MAXI AVR 682-45/15
MAXI AVR 684-45/15
MAXI AVR 686-45/15
MAXI AVR 688-45/15
MAXI AVR 690-45/15
MAXI AVR 692-45/15
MAXI AVR 694-45/15
50
75
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
MAX
OUTPUT
RATED
RESPONSE
INPUT VOLTAGE OUTPUT EFFICIENCY
TIME
[%]
CURRENT ±0.5% CURRENT
[ms/V]
[A]
[V]
[A]
131
197
263
328
420
525
656
827
1051
1313
1655
2102
2627
3284
4204
5254
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
72
108
144
180
231
289
361
455
578
722
910
1156
1445
1806
2312
2890
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
>97
10
10
10
10
10
10
10
10
12
12
12
12
12
15
15
15
The technical data in the above tables are subject to change by the Company either for internal reasons or because of a specific request from the Customer
Input output voltage 50Hz: 380/415V - Input output voltage 60Hz: 460/480V
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
26
DIMENSIONS
CABINETS
DIMENSIONS (w x d x h) mm
12
275X425X260
13
300X565X280
22
360x520x1000
23
405x670x1150
24
605x850x1450
25
605x850x1650
26
1210x850x1650
40
600x800x2000
41
1200x800x2000
42
2400x800x2000
44
3600x1000x2100
49
3600x1400x2200
50
1815x850x1650
51
1800x800x2000
52
2400x1000x2100
Any dimensions other than the ones in the above table can be dealt with on request.
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
27
DIAGRAMS
INPUT
ISOLATING
TRANSFORMER
SURGE
ARRESTER
1-PH. VOLTAGE
STABILISER (TYPE 'MINIAVR')
INPUT
INTERRUPTING
DEVICE
CURRENT
TRANSFORMER
BY-PASS LINE
V
A
Wh
BUCK/BOOST
TRANSFORMER
W
cos
INPUT
NETWORK ANALYSER
MICROPROCESSOR
DRIVE CARD
VOLTAGE
REGULATOR
M
EMI / RFI
FILTER
CURRENT
TRANSFORMER
V
A
Wh
SOFT START
CIRCUIT
RS232
OUTPUT
INTERRUPTING
DEVICE
W
cos
OUTPUT NETWORK
ANALYSER
RED: POWER LINE
BLUE: ACCESSORIES ON REQUEST
OUTPUT
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
28
DIAGRAMS
INPUT
ISOLATING
TRANSFORMER
SURGE
ARRESTER
3-PH. VOLTAGE
STABILISER
(TYPE 'MIDIAVR A')
INPUT
INTERRUPTING
DEVICE
CURRENT
TRANSFORMER
BY-PASS LINE
V
A
Wh
W
cos
BUCK/BOOST
TRANSFORMER
INPUT
NETWORK ANALYSER
VOLTAGE
REGULATOR
MICROPROCESSOR
DRIVE CARD
M
EMI / RFI
FILTER
CURRENT
TRANSFORMER
V
A
Wh
RS232
SOFT START
CIRCUIT
W
cos
OUTPUT NETWORK
ANALYSER
RED: POWER LINE
BLUE: ACCESSORIES ON REQUEST
OUTPUT
INTERRUPTING
DEVICE
OUTPUT
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
29
DIAGRAMS
INPUT
ISOLATING
TRANSFORMER
SURGE
ARRESTER
3-PH. VOLTAGE
STABILISER
(TYPE 'MIDIAVR Y')
INPUT
INTERRUPTING
DEVICE
CURRENT
TRANSFORMERS
BY-PASS LINE
V
A
Wh
W
cos
INPUT
NETWORK ANALYSER
VOLTAGE
REGULATORS
MICROPROCESSOR
DRIVE CARDS
BUCK/BOOST
TRANSFORMER
M
M
M
EMI / RFI
FILTER
CURRENT
TRANSFORMERS
V
A
Wh
RS232
SOFT START
CIRCUIT
W
cos
OUTPUT NETWORK
ANALYSER
RED: POWER LINE
BLUE: ACCESSORIES ON REQUEST
OUTPUT
INTERRUPTING
DEVICE
OUTPUT
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
30
DIAGRAMS
INPUT
ISOLATING
TRANSFORMER
SURGE
ARRESTER
3-PH. VOLTAGE
STABILISER
(TYPE 'MAXIAVR')
INPUT
INTERRUPTING
DEVICE
V
CURRENT
TRANSFORMERS
BY-PASS LINE
A
Wh
W
cos
2-WAYS MICROPROCESSOR
DRIVE CARD WITH ALARMS
INPUT
NETWORK ANALYSER
BUCK/BOOST
TRANSFORMER
VOLTAGE
REGULATORS
M
M
M
EMI / RFI
FILTER
CURRENT
TRANSFORMERS
V
A
Wh
RS232
SOFT START
CIRCUIT
W
cos
OUTPUT NETWORK
ANALYSER
RED: POWER LINE
BLUE: ACCESSORIES ON REQUEST
OUTPUT
INTERRUPTING
DEVICE
OUTPUT
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
31
ACCESSORIES
The characteristics so far described are typical of the standard machine. Accessories performing other tasks can be
supplied on request. Combinations of one or more of the following accessories are usually installed in an additional
modular enclosure.
By-Pass Switch
Useful for working on the voltage stabiliser without switching off the power supply to the loads. For the operators' safety,
the by-pass operation should be manual. The by-pass device consists of three interlocked switches with three positions:
by-pass OFF/stabiliser ON
by-pass OFF/stabiliser OFF
by-pass ON/stabiliser OFF
MAINS
USER
STABILISER
optional
optional
Input Isolation Transformer
It provides for galvanic separation between the stabiliser (and its load) and the mains.
It also protects from possible overvoltages.
It allows the connection with system without neutral cable, giving a fixed and stable star point for the system.
Interrupting Devices
Fused disconnections or circuit breakers with thermal and magnetic release can be supplied whenever it is necessary to
isolate the input line, the output one or both.
MAINS
STABILISER
USER
MAINS
STABILISER
USER
MAINS
STABILISER
USER
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
32
ACCESSORIES
Surge Arresters (SPD)
Surge arresters (lightning arresters) and overvoltage suppressers can be provided to protect from overvoltage peaks
of atmospheric or operational origin by discharging them to ground. The installation depends on the system
configuration. For example, in case of high ratings the suggested sequence would be: spark-gap arresters followed by
an isolating device (ideally an isolating transformer) and varistor-based arresters on its output.
STABILISER
MAINS
USER
F1
F2
F2
SPD
SPD
“Soft Start” Circuit
The „Soft Start‟ circuit is a protection with a double purpose:
To delay the connection to the load each time the stabiliser switches on so that the users can undergo a smooth
start-up with an already stabilised voltage.
To protect the load from surges, sags and overload by disconnecting the load from the stabiliser.
MAINS
STABILISER
TIMING CIRCUIT
USER
DELAYED
RESETTING RELAY
WITH 'LOAD-ON' SIGNAL
Protection Degree (IP)
High protection degree (up to IP54) can be obtain by increasing the dimensions or by including heat exchangers and air
conditioning units.
Additional Instrumentation and Special Costruction
For special requirements, the instrumentation can be expanded according to request, with provision for computerised
remote signalling.
Due to our flexibility, it is possible to customise the design according to specific requests
Outdoor Constructions
On request the stabiliser can be designed for outdoor installation and be housed in stainless steel or glass-fibre
cabinets.
EMI Filters
Protection against radio-frequencies disturbances (kHZ-MHZ range)
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
33
ITALFARAD S.p.A.
Via IV novembre n.1
40061 Minerbio Bo Italy
Tel. +39 051 6618311
Fax +39 051 6605594
E-mail: italfarad@italfarad.com
Web: www.italfarad.com
Edizione 07-2009
Italfarad S.p.A. Via IV Novembre n.1 Minerbio Bologna Italy Tel.+39 051 6618311 Fax +39 051 6605594 E-mail: italfarad@italfarad.com Web:www.italfarad.com
34