Eliwell RGF 312 User manual

RGF 300
Three-phase voltage regulator

RGF 300
2/53
WARNING !
HIGH LEAKAGE CURRENT: first connect to earth !
The rgf300 is a voltage regulator for three phase motors which operates
connected to the three phase mains voltage. The regulator must be installed by
qualified personnel who will connect the electric supply, attach the cables in
their permanent positions and commission the plant.
Incorrect installation of the rgf300 voltage regulator or the fan connected to it
may cause damage to objects or people so ensure the instructions in this manual
and all required security measures are read and followed carefully.
• When receiving the goods, check that the packing is intact; in the event of any damage
due to transportation, notify the forwarding agent according to legal requirements.
• The rgf series of products shown in this manual has been manufactured to the highest
standards.
• The manufacturer declines all responsibility for accident, loss or damage caused by the
use of these appliances. These must be correctly installed by qualified personnel in
conformity with their destined use and, whenever needed, must undergo correct
maintenance which should be carried out while ensuring the safety of people, domestic
animals and goods.
• The purchaser must previously ascertain the suitability of the product for the use it is
intended for and assume all consequent risks and responsibility.
• The rgf300 is a mains voltage regulator which uses the phase-cut principle completely
controlled over the three phases. It has been designed to vary the effective voltage on
three phase asynchronous motors for fans following a control signal (either mA, VDC or
Ohm). The appliance is manufactured for industrial use and therefore meets the EMC
standards that relate to industrial environments.
• Using the appliance for purposes other than the ones described above will be considered
incorrect. In particular, the appliance may NOT be used to supply machine tools or any
other machines where the motor torque-speed characteristic is not quadratic.
• If the equipment is intended for civil, commercial and/or light industrial use,
supplementary components and other types of equipment are required which can be
supplied on specific request from the purchaser. In this case, the purchaser must
provide a suitable design of the plant in which the appliance is to be installed (compliant
with EN 60555 - 2/3 standards regarding disturbance produced by electrical household
appliances and the like.
• We decline all responsibility for any errors in the catalogues, publications or other
written documents. The information in this manual is not binding and we reserve the
right to make changes to the products without prior notice, at any time and in any way
that we deem convenient for production purposes or useful for increasing functionality
and performance.

RGF 300
3/53
SAFETY RULES !
This appliance has been designed to give excellent performance provided it is installed and used carefully in
a suitable electric environment by qualified personnel.
The following rules must be obeyed when installing the regulator :
• Follow the instructions in this manual exactly and observe all safety measures in force.
• Do NOT tamper with or disassemble the regulator's internal components; doing so will
INVALIDATE THE GUARANTEE and may cause unnecessary damage.
• The regulator does not contain components that can be repaired by the user.
• The regulator must be suitably and effectively earthed by the installer according to the standards in force;
earthing is essential for the EMC filter to operate correctly.
• The user must be protected from the electric supply and the motor must be protected from possible
overloads in compliance with the standards in force.
• DO NOT supply the regulator without the internal protection panel made from lexan.
• DO NOT touch the electrical parts of the circuit when the power supply is connected under any
circumstances.
• Before supplying power to the unit, check carefully that the power and earth are correctly connected.
• If the mains supply is "disturbed", which may be due to other electrical power components causing
irregularities in the supply (power contactors), it is recommended that supplementary three phase
‘SURGE ARRESTER’filters are installed directly on the regulator supply.
• Avoid repeatedly connecting and disconnecting the power supply to the regulator; a constant supply
keeps the regulator at working temperature and eliminates problems caused by condensate inside the
protection case.
• Alternatively, use the remote terminal board contact 'MB' S2 = ON/OFF.
• The S2 = ON/OFF contact on the MB terminal board does not cut the mains supply and therefore cannot
be used as a safety switch.
• Install the regulator out of direct sunlight so that the container cannot get overheated and cause a
reduction in the maximum load current.
• The appliance may operate at environmental temperatures up to 50°C. Do not install it where this
temperature may be exceeded or the integrity of the regulator will be compromised and the appliance
may make the user appliance operate at full load (100%) with all consequent effects.
• The appliance must be stood vertically to encourage heat dissipation and to ensure there is a sufficient air
circulation and free space measuring 150 mm above and below the regulator. If several regulators are to
be grouped together on a single electric board, provide forced air circulation with a fan or cooling unit of
sufficient power.
• Use the holes on the lower and power terminal board sides of the appliance, for entrance of the
connection cables. This will prevent water, dust etc. from getting in and will ensure the IP55 protection
level is maintained using adequately sized cables and sheaths of suitable quality.
• Reassemble and check the cover of the external protection panel is properly closed.
• DO NOT alter or damage the identification stickers on the equipment.
• DO NOT force the trimmers to rotate beyond their set mechanical travel.
• Only alter the trimmers intended for regulation.
• Under no circumstances alter the trimmers marked with the spot of red paint.
WARNING !
HIGH LEAKAGE CURRENT: first connect to earth !

RGF 300
4/53
CONTENTS
1.0 PRESENTATION ……………………………………………………..….……………………………
1.1 DESCRIPTION ………………………………………………………………………………..
1.2 INSTALLATION AND MACHANICAL DIMENSIONS ……………………………………………..
1.3 PRINCIPLE OF OPERATION ……………………………………………………………………
1.3.1 OPERATING MODE …………………………………………………………………
1.3.2 APPLICATION ……………………………………………………………………….
1.4 ELECTRIC MOTORS …………………………………………………………………………..
1.4.1 MAGNETOTHERMAL PROTECTION ……..……………………………………………
1.5 RGF300 TECHNICAL DATA ….……………………………………………………………….
2.0 ELECTRICAL CONNECTIONS …………………………………………………………………………
2.1 ELECTRICAL CONNECTIONS, POWER CARD ……..…………………………………………….
2.2 ELECTRICAL CONNECTIONS, ANALOGUE INPUT SIGNALS ……...……………………………..
2.2.1 CONNECTION OF XSK PRESSURE TRANSDUCERS ……………………………………
2.2.2 CONNECTION OF NTC TEMPERATURE SENSORS …………………………………….
2.2.3 CONNECTION OF OTHER SENSORS AND CONTROL SIGNALS ………………………….
2.2.4 REMOTE CONNECTION FOE A CURRENT (MA) OR VOLTAGE (VDC) CONTROL SIGNAL .
2.2.5 CONNECTION OF THE RGF MULTIDRIVER INPUTS / OUTPUT ………………………
2.3 ELECTRICAL CONNECTIONS, ON-OFF INPUTS / OUTPUT ………………………………………
2.3.1 OPERATING SELECTION ………………………………………………………………
3.0 COMMISSIONING PROCEDURE …………….…………………………………………………………
3.1 JUMPERS ……………………………………………………………………………………..
3.2 MASTER, VERSION M (4-20mA), FOR 1 OR 2 CONTROL INPUTS ……………………………
3.3 MASTER, VERSION V (0-10VDC), FOR 1 OR 2 CONTROL INPUTS ……………………………
3.4 SLAVE, VERSION M (0-20mA), FOR 1 OR 2 CONTROL INPUTS ………………..………..….
3.5 SLAVE, VERSION V (0-10VDC), FOR 1 OR 2 CONTROL INPUTS ……………………………..
3.6 MASTER, VERSION X OR Y (NTC °C), FOR 1 OR 2 CONTROL INPUTS …………….………..
3.7 OPTIONAL MODULE FOR DOUBLE SET-POINT CONFIGURATION (SP1-SP2) …………….…...
4.0 CONTROL TRIMMER …………………………………………………………………………………
4.1 MAX. OUTPUT REGULATION ………………….. TRIMMER P4 …………………………….
4.2 MIN. OUTPUT R ………………………………..… TRIMMER P5 ……………………………
4.3 CUT-OFF REGULATION ………………..……..…. TRIMMER P6 ……………………………
4.4 PROPORTIONAL BAND REGULATION ……..……... TRIMMER P2 ……………………………
4.4.1 VERSIONS WITH MASTER REGULATOR OPERATION ………………………………
4.4.2 VERSIONS WITH SLAVE REGULATOR OPERATION ……………………………….
4.5 SET-POINT REGULATION (MODELS M, V, X, Y) … TRIMMER P3 …………………………..
4.5.1 DECADIC SET-POINT OPTION (MOD. M, V, X, Y) P3 ………………………………..
4.6 SOFT-START REGULATION ………………...……. TRIMMER P1 ….……………………….
4.7 MANUAL REGULATION (HEAT-PUMP) ..………... TRIMMER P7 …………………………..
5.0 HELPI – PORTABLE DISPLAY UNIT …………………………………………………………………
6.0 RGF300 EASY REFERENCE COMMISSIONING GUIDE ………………………………………………..
7.0 TROUBLESHOOTING . . . ………………………………….…………………………………………....
8.0 LIABILITY AND RESIDUAL RISKS……………………………….………………………………………
9.0 DISCLAIMER……………………………….……………………………………………………………

RGF 300
5/53
Vdc
mA
NTC
1.0 PRESENTATION
THANK YOU for choosing an rgf300 series three phase voltage regulator, designed specifically to give the
maximum yield and greatest ease of use.
Like all our products, it has been built to the very highest quality standards using electronic components of
the utmost reliability which have undergone functional tests that guarantee use of the product for at least
30,000 hours of continuous operation without problem.
The rgf300 regulator is a power unit designed to meet requirements of quality and flexibility of use in plants
and machines in which proportional variation of the speed of rotation of the fans is essential.
The regulator is housed in a GEWISS GW Plast

120°C case (fig. 1) which guarantees high heat resistance
during ordinary use (120°C), increased mechanical impact resistance (IK = 08) and a protection level (IP55)
that allows the regulator to be installed out of doors.
Inside the case there is a lexan protection panel displaying instructions for use and commissioning of the
rgf300.
The 12A rgf300 is shown in fig. 1.
fig. 1
Before installing the device, you are invited to read this manual which describes the necessary
procedures for correct installation and commissioning of the machine.
rgf300

RGF 300
6/53
Like all our products, the rgf300 series bears CE marking as required by directive 89/336/ECC and its
subsequent modification EEC/92/31 on electromagnetic compatibility.
Since all these products are not used as "stand alone" appliances but incorporated into other plants or
machines, the standards' compatibility test was carried out under typical operating conditions.
The essential requirements of the directive are satisfied by conformity to "generic standards" for heavy
industry.
EN 50081-2 emission standard, EN 50082-2 immunity standard, and in particular:
EN 55011 class B, for radiated disturbances
EN 55011 class A, for conducted disturbances
ENV 50140 (IEC 801-3) for susceptibility (on the power supply)
ENV 50141 for conducted susceptibility on power lines
IEC 801-4 for fast transistors (bursts / high frequency disturbances)
IEC 801-2 for electrostatic discharge (ESD)
The tests and checks for conformity have been carried out according to the procedures described in the
product's technical documentation. The system used was formed by an rgf300 voltage regulator, a control
cable and relative controls, a power supply cable, a motor cable and a fan.
fig. 2
Responsibility for the final characteristics of the system or plant regarding the EMC directive
rests with the installer. The equipment must be installed in observance of the regulations in
force using the information presented in this manual.
3
IP 55
120°C
STOCK & WORK
- 20
+85
°C
UR%
- 20
+50
°C

RGF 300
7/53
Fig. 3 represent the rgf300 regulator with the general contents
fig. 3
CONTENTS of rgf300 regulator
1. Control Trimmer for work parameters regulation 2. Double 10 positions rotary switch for Set-point (optional)
3. Reference table for Set-point rotary centesimal switch 4. Lexan internal panel for protection against direct contact
5. Terminal block for analog inputs/output signals 6. Control card (upper)
7. Power card (lower) 8. Terminal block for load connection (U-V-W)
9. Terminal block for PE connection 10. Terminal block for threephase power supply (R-S-T)
11. SURGE ARRESTER circuit / PE faston connection 12. SURGE ARRESTER circuit like EN 61000-4-5
13. CN2 connector for HELPIdisplay unit 14. Terminal block ON-OFF auxilary inputs/output signals
15. Control Trimmer for Manual mode (heat-pump) regulation 16. Status LED
17. Characteristic with function parameters 18. Cover screws
19. Macrolon cover of the case 20. GEWISS GW Plast 120°C case
21. Black anodized heat sink 22. Screws hole for wall installation
1
22
4
5
7
8
17
18
15
14
13
12
910
6
2
21 19 20
16
3
11

RGF 300
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1.1 DESCRIPTION
The rgf300 series three-phase cutting regulators comprises two electronic cards on a vetronite support
mounted inside the GEWISS IP55 GW Plast

120°C case.
The two cards represent the control section (upper) and power section (lower).
fig. 4
The control card contains the following regulation, connection and signalling components:
•trimmers Marked "Pn"; used to set working parameters
!" centesimal switch Marked “SW”; used for the simply Set-Point parameter, with 100 working points
on the transducer skale (only with PB 1064 option)
•relay Marked "RL1"
Relay with commutation contact for external signalling of correct operation or
stop (see selection jumper J14).
•Leds
AC LINE ALARM
T.K. ALARM
RL1 ON
MANUAL
Marked "Dln"
RED Led DL1 to signal "regulator stop/fault"
RED Led DL2 to signal "external heat protection (T.K)."
GREEN Led DL3 to signal commutation relay RL1 in the N.O. position
YELLOW Led DL4 to signal “HEAT PUMP”mode
•jumpers Marked 'Jn'; used to change preset operational modes
•flat cable
Marked 'FL' The flat allows connection to the control and power cards.
Check the flat is securely fixed during maintenance or commissioning.
• CN2 Rapid connector to the portable HELPI10 unit for display of the rgf300's work
parameters
•Inputs/output
signals terminal
boards
Terminal board MA for connection of the control analogue input signals
Terminal board MB for connection of the ON-OFF inputs and outputs
The power card contains the following connection components:
•power supply
terminal boards
'M1' for three-phase input supply R,S,T
'M2' for three-phase output U, V, W
‘M3’ for the Earth / PE connection
1 2
P7
RL1
J1
P1
P2 Proportional Band
P3 Set-Point
P4
P5
P6
P7
= soft-start
=
=
= max. output
= min. output
= cut-off
= Set- H.P. mode
J2
J3
J4
J5 J6
J7
J12
J8 J10
J9 J11
J17
J5
J16
J13
J15
J14
1
2
3
1
2
3
5
4
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
3
1
2
1
2
1
2
P2 P3 P4 P5 P6 P1
Mm MmMmMm MmMm
Mm
CN 2
FL
M2 M3 M1
MA
ALARM
AC LINE
ALARM
T.K. RL1
ON
MANUAL
MB
SP1
RGFPB10640
(OPTIONAL)
12
3
4
5
6
7
89012
3
4
5
6
7
89012
3
4
5
6
7
89012
3
4
5
6
7
890
CN3
SW1 SW2 SW3 SW4
SP1 SP2
P3
SP2

RGF 300
9/53
1.2 INSTALLATION AND MECHANICAL DIMENSIONS
The rgf300 regulator must always be securely assembled and fixed using the four (4) attachment screws on
the side fins before connecting to the power supply.
The holes provided on the lower part of the regulator are for entry of the electric connection cables:
• four pole line (three phase + Earth) to power the regulator,
• four pole line (three phase + Earth) to power the load,
• signal cable lines for the analogue inputs and digital outputs.
To make installation simpler, all regulators are also fitted with stuffing boxes in PA6 polyamide, class V2,
IP68, for use with the power and signal cables.
The regulator is cooled by natural convection and so air must be able to pass freely below and above the
appliance.
Therefore ensure there is at least 150 mm. of free space above and below the regulator.
fig. 5
Mechanical Dimensions
MODELS A B C D E F kg.
∅
∅∅
∅
Fixing
screw holes
rgf 312 286 201 130 255 181 255 4.0 ∅6
rgf 320 351 237 181 317 185 320 5.5 ∅6
rgf 325 351 237 201 317 172 320 8.0 ∅6
rgf 340 416 318 178 397 275 385 11.0 ∅6
rgf 360 460 318 228 397 260 410 17.0 ∅8
RL1
ON
T.K.
ALARM
AC LINE
ALARM
HELPi UNIT Heat - Pump

RGF 300
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Table 1

RGF 300
11/53
1.3 PRINCIPLE OF OPERATION
The rgf300 series appliances are voltage regulators that use the phase cutting principle totally controlled over
three phases.
The regulators, also referred to as speed controls, have been designed to change the average voltage on the
following types of equipment, according to a control signal:
•asynchronous three phase motors connected to fans, pumps, agitators, mixers;
•electrical resistor devices with sectioned single / three phase.
Regulation occurs as a result of cutting of the input sinusoid. Regulation does not generate any torque knock
or pulsation and is particularly quiet. Any voltage loss is contained within a maximum limit of 1%.
Fig. 6 shows a block diagram of regulator rgf300.
A - Power circuit
B - Mains filter and EMC
protective devices
C - Power supply and synchronism
signals
D - Insulators for the control
signals of the power devices
E - Regulation and control circuit
F – Modulator for control of the
power devices
fig. 6
The speed regulators are sized to withstand a starting current equal to more than twice the rated current;
therefore, when choosing a regulator, it is essential to take into consideration both the motor starting current
and the type of motor.
It is actually well-known that, while the starting current in axial fans is equal to 2 or 3 times the rated current,
the same current in centrifugal fans can have values around 7 or 8 times the rated current.
As far as the choice of motor is concerned, it is advisable to choose motors suited to the type of regulation.
As a general rule, the best suited are:
• motors with high slipping resistive motors
• defluxed motors
• tropicalised motors
• CLASS H motors
as these allow better performance to be obtained with speed changes, they are quieter and start with lower
current.
When choosing a motor, it is always advisable to contact your own supplier and order a motor which is
suitable for speed control by voltage change. Subsequently, practical trials should be carried out on the
motors or prototype machines in order to check their correct operation.
After choosing the motor, the speed regulator must be ordered according to
• the rated voltage,
• maximum power required (load-Amperes) bearing in mind the starting current.
CONTROL CIRCUIT POWER CIRCUIT
T
S
R
PE
PE
W
V
U
E
F
C
D
B
A

RGF 300
12/53
After the motor characteristics have been checked, the following should be defined in order to identify the
type of operating mode and application.
1.3.1 Operating mode
The rgf controls allow two different types of operation depending on which type of input is available:
• operation as REGULATOR (also called MASTER)
the phase cutting regulators is directly connected to one or more sensors; the phase cutting is a function of
the values selected for:
#" Set-Point P3 (trimmer or centesimal switch)
#" Proportional band P2 (trimmer)
• operation as POWER UNIT (also called SLAVE)
In this case, the rgf is set up to be controlled by an external Master regulator which decides the phase cutting
of the voltage by sending the control signal to the slave.
The incoming control signal to the rgf300 regulators can be:
For a MASTER (mA – Vdc) Active sensors with control in current (mA) or voltage (Vdc)
For a MASTER (ohm)
NTC sensors with control in °C/ohm ( 10 kohm @ 25 °C )
For a SLAVE (mA – Vdc) Control signals in current (mA) or voltage (Vdc)
1.3.2 Application
It is generally possible to connect one or two sensors/control signals to all ‘MASTER’ and ‘SLAVE’
models; with two (2) sensors-signals connected, the regulator automatically selects the greater or lesser
signal.
In the case of active sensors, this can be directly powered (24Vdc / max. 40 mA).
The principal applications are for measuring pressure (bar), temperature (°C), humidity (%RH), delivery
(cu.m/h), superpressure (mm.), static pressure (Pa), supertemperature (destratification) etc. in plants and
machines.
fig. 7
MASTER SLAVE

RGF 300
13/53
1.4 ELECTRIC MOTORS
Three phase asynchronous motors can be connected to the rgf300 regulator in applications where the torque-
motor speed characteristic is quadratic.
This mainly allows phase cutting application with axial and centrifugal fans used for control purposes.
The correct electrical connection and the supply voltage are given on the motor's specifications plate.
The sense of rotation of the motor can be altered by swapping the connections of two of the three supply
cables.
It is important to keep the motor power supply cable as short as possible to reduce the level of interference
and leakage currents to a minimum (10 / 15 mt); if the cable has to be long, an auxiliary three-phase filter of
exactly the same power as the regulator must be installed on the regulator output.
The figure below shows the star and delta connection configurations.
fig. 8
The rgf300 regulator can control several motors connected in parallel but the absorption of the motors' total
current must never exceed the rated current as given on the rgf300's specification plate.
The speeds of the motors vary at the same time though any differences in behaviour during start up and at
low speeds are due to slight differences between the motors even if they are of the same type. However, if
the required speeds of the motors are different, motors must be used with different rated speeds. Bear in
mind though that motors with very different characteristics create different electrical situations and these
may cause problems on start up and at low speeds caused by different resistances of the stators which require
different voltages on start up and at low speeds.
1.4.1 Magnetothermal protection
rgf300 devices must be protected by a magnetothermal switch fitted upstream of the cutting regulators.
Installation of magnetothermal protections is the responsibility of the installer.
It is advisable to fit an automatic magnetothermal protection with a 'C' intervention curve having the
following capacity:
RGF 300 models magnetothermal
carrying capacity
rgf 312 20 A
rgf 320 30 A
rgf 325 36 A
rgf 340 60 A
rgf 360 80 A
Table 2
U V W
Z X Y
U V W
Z X Y
STAR CONNECTION DELTA CONNECTION

RGF 300
14/53
1.5 rgf300 TECHNICAL CHARACTERISTICS
Voltage 420VAC +/- 10 % three-phase (230VAC and 500VAC on request)
Frequency 50 Hz (60 Hz)
SUPPLY Overvoltage protection for installation Category II (4 KV)
RGF 312 12 A up to 50°C environment, over decrease by 0.6 A/°C
RGF 320 20 A up to 50°C environment, over decrease by 1.0 A/°C
RGF 325 25 A up to 50°C environment, over decrease by 1.2 A/°C
RGF 340 40 A up to 50°C environment, over decrease by 1.8 A/°C
Rated
RGF 360 60 A up to 50°C environment, over decrease by 2.5 A/°C
CURRENT
Overload 200% of the rated current (max. 10” every 3’)
Control circuits 10VA
RGF 312 72 W @ 12A
RGF 320 120 W @ 20A
RGF 325 150 W @ 20A
RGF 340 240 W @ 40A
POWER Thermally dissipated
RGF 360 360 W @ 60A
OPERATING
PRINCIPLE Totally controlled three-phase cutting, with compensation for inductive loads and motors, without need for
connection to NEUTRAL
POWER unit
(Vers. M , V )
The output voltage depends on the control signal prevailing between the
two available at the inputs, which is chosen by means of the pre-
established mode, according to the specific appliance regulating curve.
The action can be :
DIRECT, with the output increasing as the input increases, or
REVERSE, with the output decreasing as the input increases.
Standard Config. : output increasing as the controlled variable increases
OPERATING
CHARACTERISTIC
Regulator
(Vers. M , V , X , Y)
The output voltage changes to keep set to the target point, selected with
the Set-Point, the quantity measured by the transducer prevailing
between the two available at the inputs, which is chosen by means of the
pre-established mode (greater or lesser in value).
The action mode, either direct or reverse, is chosen in consideration of
the controlled quantity, transducer characteristic and load action.
Standard: output increasing as the controlled variable increases
Vers. MTwo
0-20 mA, Ri = 100 hom analog inputs, priority to the greater std.
Vers. VTwo
0-10 Vdc, Ri = 10 khom analog inputs, priority to the greater std.
Control Vers. X, Y Two kohm analog inputs for the NTC sensors supplied (10KΩ
ΩΩ
Ω@
25°C), priority to the hottest sensor std.
Heat protection ON/OFF input, motor protection NC thermal contact
Start/Stop ON/OFF input :Off Vin=0 = Start / ON(VIN=24V) : Stop
Automatic/Manual ON/OFF input:Off (Vin=0) =Automatic /ON (VIN=24V)=Manual
INPUT
SIGNALS
Set-Point 1 / Set-Point 2 ON/OFF input for Set-point 1/2 commutation (Only with PB1064 )
Transducer supply Two +22Vdc (-10% / +20%) 40 mA non-stabilised outputs, protected
from short circuit
Potentiometer supply Two +10Vdc / 5 mA stabilized outputs
Auxiliary control 0-10V / 1 mA analog output for cascade control of other SLAVE units
OUTPUT SIGNALS
RL1 service relay NO/NC relay contact, free from potential, for separate or joint signalling
of : alarm signals absent / start enabling / voltage supply
Version & Input M: 0-20 mA V: 0-10 Vdc X: +10/+60°C Y: -20/+20°C
Target value 0 ... 20 mA 0 … 10 Vdc +10 ... +60 °C -20 ... +20 °C
Proportional range 0.4 … 4 mA 0.3 … 3.5 Vdc 3 … 30 °C
Minimum limit / Cut-Off Adjustable from 0% to 100%
Maximum limit Adjustable from 100% to 0%
Acceleration ramp Adjustable from 1” to 10”
Direct/Reverse presetting Action mode of input prevailing over output : Direct or Reverse
ADJUSTMENTS
AND
PRESETTINGS
Prevailing input presetting Selection mode for prevailing input : greater / smaller
AC LINE ALARM ON Red Signals locked state due to absence of one supply phase
T.K. ALARM ON Red
Signals locked state due to motor thermal protection NC contact opening
RL1 ON Green Signals RL1 service relay energised state
LED
SIGNALLING MANUAL MODE ON Yellow
Signals “MANUAL” operation state at fixed speed

RGF 300
15/53
Mains surveillance Continually checks presence of the three mains phases; when one phase
is absent, it stops the appliance and switches on the “phase absent” alarm
signal LED (AC LINE ALARM)
EMC integrated mains filter According to EN 55011 (CEI 110-6) Class B:
ISM appliances directly connected to low voltage power mains
PROTECTIONS
Overvoltage protection According to EN 61000-4-5 : overvoltage Category II (4 KV)
RGF 312 286 x 201 x 130 mm 4.0 kg
RGF 320 351 x 237 x 181 mm 5.5 kg
RGF 325 351 x 237 x 201 mm 8.0 kg
RGF 340 416 x 318 x 178 mm 11.0 kg
Dimensions and Weight
RGF 360 460 x 318 x 220 mm 17.0 kg
Materials GW-Plast 120°C and black anodised aluminium
Degree of protection IP 55
Environmental pollution Strong pollution
CASE
Fire resistance Category D
Case Class
I (use of earthed protection cable)
INSULATION Control circuits 4000V between control input and mains voltage components
Working -20 T 50 (from –20°C to + 50°C)
TEMPERATURE Storing -30 T 85 (from –30°C to + 85°C)
HUMIDITY RH < 85%
INSTALLATION Vertical wall-mounting only, with N° 4 ∅
∅∅
∅6 mm. holes (RGF350 with N° 4 ∅
∅∅
∅8 slotted holes)
SIGNAL Trailing cable with rated cross section 1.5 sq mm / 22-14 AWG Cu
RGF 312 Trailing cable with rated cross section 2.5 sq mm / 20-12 AWG Cu
RGF 320 Trailing cable with rated cross section 4.0 sq mm/ 24-10 AWG Cu
RGF 325 Trailing cable with rated cross section 10 sq mm / 20-6 AWG Cu
RGF 340 Trailing cable with rated cross section 10 sq mm / 20-6 AWG Cu
ELECTRICAL
CONNECTIONS POWER
RGF 360 Trailing cable with rated cross section 10 sq mm / 20-6 AWG Cu
89/392/EEC Directive
73/23/EEC Directive
(93/68) CEI-EN 60204-1 : “ Safety of machinery”
EN 50081-2 Generic standard for industrial environment emission
EN 50082-2 Generic standard for industrial environment immunity
EN 55011 class B, for radiated disturbance
EN 55011 class B, for conducted disturbance
ENV 50140 (IEC 801-3) for susceptibility (on the supply)
ENV 50141 for conducted susceptibility on the signal lines
IEC 801-4 for fast transients (burst / high-frequency disturbance)
TECHNICAL
STANDARDS 89/336/EEC Directive
IEC 801-2 for electrostatic discharge (ESD)
Table 3

RGF 300
16/53
2.0 ELECTRICAL CONNECTIONS
2.1 POWER CARD ELECTRICAL CONNECTIONS
For supply and load connection, reference should be made to the diagrams shown in fig. 8, making sure the
section of the cables is adequate to the connected load.
The power cables (supply and load) must be installed separately from the control cables (analogue inputs and
ON-OFF inputs/outputs) keeping the maximum distance possible between the conductors.
Do not place power cables with signal cables in the same raceway. If the cables cross one another,
ensure it is at 90°.
ATTENTION : connect the earth conductor to the screw placed purposely beside the dissipator. Use
heat resistant cables able to withstand temperatures greater than 90°C.
SURGE ARRESTER : electric protection placed between the regulator supply and the earth to protect
the device from transitory mains excess voltage.
ATTENTION : disconnect the PE faston contact from the earth reference, in the 'ELECTRIC
STRENGTH TEST’.
The rgf300 regulators allows connection of three-phase loads without requiring connection of the NEUTRAL.
This simplifies installation and facilitates the star or delta load configuration.
It is advisable to provide a by-pass switch to allow load activation even when the cutting regulators is faulty
(emergency by-pass).
When connecting the by-pass, the following precautions should be taken into consideration:
i) connection made through the by-pass switch must keep phase correspondence unaltered so as to
avoid destructive shortcircuits and maintain the motor's sense of rotation.
ii) before supplying the load with maximum voltage, supply to the regulator should be disconnected,
therefore:
•
••
•it is advisable to use a three-position manual switch as a commutation device
•
••
•if automatic commutation is carried out by means of contactors, make sure there is some delay (at
least 2 seconds) between regulator disconnection and load activation operations.
Electrical connection of the supply and load,
for rgf300 regulators is shown in fig. 9
PE
L1
L2
L3
U V W PE R S T
BY-PASS

RGF 300
17/53
fig. 9

RGF 300
18/53
2.2 ELECTRICAL CONNECTIONS, ANALOGUE INPUT SIGNALS
The connections for the control analogue inputs are described below.
They can be connected to the MA terminal board, in particular:
MASTER version Active sensors with control in current (mA) or voltage (Vdc)
MASTER version NTC sensors with control in °C (10 kohm @ 25 °C )
SLAVE version Control signals in current (mA) or voltage (Vdc)
By connecting the second sensor it is possible to obtain regulation control on the basis of the GREATER
SIGNAL VALUE (STANDARD version) provided by one of the two sensors.
Warning : when two active type sensors with current or voltage output are connected, use the +V
terminal for supply to +22 Vdc / 40mA (MA 3 for IN 1 and MA 7 for IN 2)
There is also a control output available on the terminal board to pilot the rgf unit, single phase or three
phase, that executes regulation on differentiated loads using the same automatic regulation parameters of the
main rgf300.
CONNECTIONS Trailing cable with rated cross section 1.5 sq mm / 22-14 AWG Cu
fig. 10
4 - 20
mA 4 - 20
mA
1 2 3 4 5 6 7 8 9 10
0 - 10
Vdc 0 - 10 Vdc
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
NTC NTC
0 - 20
mA 0 - 20
mA
1 2 3 4 5 6 7 8 9 10
0-10
Vdc 0-10
Vdc
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
Alarm
Rela
y
RL1
NC
S1 S2 TK
NO COM
1 2 3 4 5 6 7 8 9 10
RGF-MEI
V
M
V
V
M
X
Y
M
V
X
Y
S3
RGF-MEI
10
9 8
RL1
OFF
ALARM - RELAY
NC NA Com
ON 1 ON 2 ON 3
rgf300
ON 2
ON 1
ON 3 ON 2
ON 1
ON 3 ON 2
ON 1
ON 3
rgf300rgf300
GENERAL ALARM
SELECTIONS
1 2 3 4 5 6 7 8 9 10
RGF-MEIRGF-MEI
M
V
SLAVE
SLAVE
SLAVE
SLAVE
SLAVE
SLAVE
SLAVE
SLAVE

RGF 300
19/53
One of the main applications of the rgf300 series regulators is the control of voltage and speed of rotation of fans. This
is modulated to keep temperature or pressure constant as a work point for one or more refrigerating circuits
(condensator or evaporator mode).
In the STANDARD condition, the fan reaches maximum voltage in output (P4) coinciding with the work Set-point.
Directions are given below for connection or calibration of rgf300 regulators with active pressure sensors, NTC
temperature sensors and other possible applications for direct or remote regulation.
2.2.1 Connection of XSK pressure transducers (4-20 mA)
The table below lists the information necessary for calibration of the Set-point (page 34) with the position of P3
referred to the Centesimal Commutators (Com.) or Trimmer (Trim.), and for calibration of the Proportional Band
with the position of P2.
Set-Point SP / P3 for 4-20mA, setting with
SP / P3 Trimmer Centesimal Switch Proportional Band PB / P2 setting for
4-20 mA pressure transducers
START
position
START
position
Setting
Trimmer mA V(*) 0-15
bar 0-25 bar 0-30 bar N° Set.
Trim mA 0-15
bar 0-25 bar 0-30 bar
m 4 0.4 0.00 0.00 0.00 00 m 0.4 0.37 0.62 0.75
5 0.5 0.93 01.56 01.87 06
6 0.6 1.87 03.12 03.75 12
7 0.7 2.81 04.68 05.62 18
8 0.8 3.75 06.25 07.50 25
9 0.9 4.69 07.81 09.37 31
10 1.0 5.63 09.37 11.25 37
11 1.1 6.56 10.94 13.12 44
c 12 1.2 7.50 12.50 15.00 50 c 2.1 1.94 3.28 3.93
13 1.3 8.44 14.06 16.87 56
14 1.4 9.38 15.63 18.75 62
15 1.5 10.31 17.19 20.62 68
16 1.6 11.25 18.75 22.50 74
17 1.7 12.19 20.31 24.37 80
18 1.8 13.13 21.88 26.25 87
19 1.9 14.07 23.44 28.12 93
M 20 2.0 15.00 25.00 30.00 99 M 4.0 3.74 6.24 7.50
Tab. 4
(*) Column Vgives the voltage values legible with a multimeter (20Vdc scale limit) on the IN/Gnd terminals of the
analogue inputs, corresponding to the mA control signal generated by the 4-20mA transducer in regulation.
Fig. 11 shows the connection of two pressure transducers plus the type of operation (standard) and the operating
regulation controls. WARNING :
do not invert the transducer
cables (IN / +V) when
connection is made to terminals
1/3 and 5/7 as the transducer
may be damaged.
ATTENTION :
at standard configuration
P3/Set-point =max. output fan
fig. 11
10
9
8
7
6
5
4
3
2
1
ACCURACY
PRESSURE TRANSDUCER
GND
OUT
10V
+V
GND
IN 2
10V
+V
GND
IN 1
+/- 3% FS
4-20mA
0-10Vdc
XSK 2
XSK 1
M0
c
m
Mm
c
Mm
c
M
0
c
m
M
0
c
m
M
0
c
m
Mm
c
Mm
c

RGF 300
20/53
2.2.2 Connection of NTC temperature sensors (10kohm @ 25 °C)
Two versions of NTC temperature sensors are available for rgf300 models:
• X for scale +10 °C to +60 °C
• Yfor scale - 20 °C to +20 °C
The table below lists the information necessary for calibration of the Set-point (page 34) with the position of
P3 referred to the centesimal Commutators (Com.) or Trimmer (Trim.), and for calibration of the
Proportional Band with the position of P2.
Setting of work point SP / Set-point P3 with NTC probe Proportional Band PB/P2
SP > Trimmer P3 SP > Centesimal switch with NTC probe
START
position
START
position
START
position
TRIMMER
SETTING X (°C)
10°/60° Y (°C) -20°/20° CENTESIMAL
SETTING N° X (°C)
10° / 60° Y (°C) -20°/ 20° TRIMMER
SETTING For X & Y
Skale
6° -22° 00 10° -20° 3 °C
10 15° -16°
m
20 20° -12°
m
30 25° -8°
40 30° -4°
35° 0° 50 35° 00° 18 °C
c60 40° 4° c
70 45° 8°
80 50° 12°
90 55° 16°
M
64° 23°
99 60° 20°
M30 °C
Tab. 5
Connection of the two NTC sensors is shown in fig. 12 below.
Also shown is the type of operation (standard) and operating regulation controls.
Master X for scale +10 C° to +60 C° Master Y for scale -20 C° to +20 C°
ATTENTION :
at standard configuration
P3 / Set-point =max.
output fan
fig. 12
°C Airflow = 35"
NO-Air = 70"
T. C.
10
9
8
7
6
5
4
3
2
1
NTC 2
NTC 1
NTC
NTC probe (10 kohm a 25 °C)
GND
OUT
10V
+V
GND
IN 2
10V
+V
GND
IN 1
Mm
c
Mm
c
Mm
c
Mm
c
Mm
c
Mm
c
Mm
c
Mm
c
Mm
c