Watson-Marlow Varmeca 30 User Manual

3776 en - 07.2007 / h

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VARMECA 30

Variable speed motor or geared motor

Installation and maintenance

LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

NOTE

LEROY-SOMER reserves the right to modify the characteristics of its products at any time in order to incorporate the latest
technological developments. The information contained in this document may therefore be changed without notice.

CAUTION

For the user’s own safety, this VARMECA 30 motor must be connected to an approved earth ( terminal).
If accidentally starting the installation is likely to cause a risk to p ersonnel or the machines being driven, it is essential to supply
the equipment via a circuit-breaking device (power contactor) which can be controlled via an external safety system (emergency
stop, detection of errors on the installation).

The VARMECA 30 motor is fitted with safety devices which, in the event of a fault, control stopping and thus stop the motor. The
motor itself can become jammed for mechanical reasons. Voltage fluctuations, and in particular power cuts, may al so cause the
motor to stop.
The removal of the causes of the shutdown can lead to restarting, which may be dangerous for certain machines or installations.
In such cases, it is essential that the user takes appropriate precautions against the motor restarting after an unscheduled stop.
The variable speed drive is designed to be able to supply a motor and the driven machine above its rated speed.
If the motor or the machine are not mechanically designed to withstand such speeds, the user may be exposed to serious danger
resulting from their mechanical deterioration. It is important that the user checks that the installation can withstand it, before
programming a high speed.
The variable speed drive which is the subject of this manual is designed to be integrated in an installation or an electrical machine,
and can under no circumstances be considered to be a safety device. It is therefore the responsibility of the machine manufacturer,
the designer of the installation or the user to take all necessary precautions to ensure that the system complies with current
standards, and to provide any devices required to ensure the safety of equipment and personnel.

LEROY-SOMER declines all responsibility in the event of th e above recommendations not being observed.

36

LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

SAFETY AND OPERATING INSTRUCTIONS FOR ELECTRICAL ACTUATORS
(In accordance with the low voltage directive 73/23/EEC modified by 93/68/EEC)

• Throughout the manual, this symbol warns of

consequences which may arise from inappropriate
use of the VARMECA 30, since electrical risks may lead
to material or physical damage as well as constituting a
fire hazard.

1 - General

Depending on their degree of protection, VARMECA 30
motors may contain moving parts, as well as hot surfaces,
during operation.
Unjustified removal of protection devices, incorrect use, faulty
installation or inappropriate operation could represent a
serious risk to personnel and equipment.
For further information, consult the manual.
All work relating to transportation, installation, commissioning
and maintenance must be performed by experienced,
qualified personnel (see IEC 364 or CENELEC HD 384, or
DIN VDE 0100 and national specifications for installation and
accident prevention).
In these basic safety instructions, qualified personnel means
persons competent to install, mount, commission and operate
the product and possessing the relevant qualifications.

2 - Use

VARMECA 30 motors are components designed for
integration in installations or electrical machines.
When integrated in a machine, commissioning must not take
place until it has been verified that the machine conforms with
directive 89/392/EEC (Machinery Directive).
It is also necessary to comply with standard EN 60204, which
stipulates in particular that electrical actuators (which include
VARMECA 30) cannot be regarded as circuit-breaking
devices and certainly not as isolating switches.
Commissioning can take place only if the requirements of the
Electromagnetic Compatibility Directive (89/336/EEC,
modified by 92/31/EEC) are met.
VARMECA 30 motors meet the requirements of the Low
Voltage Directive 73/23/EEC, modified by 93/68/EEC. The
harmonised standard of the DIN VDE 0160 series in
connection with standard VDE 0660, part 500 and EN 60146/
VDE 0558 are also applicable.
The technical characteristics and instructions concerning the
connection conditions specified on the nameplate and in the
documentation provided must be observed without fail.

4 - Installation

The installation and cooling of equipment must comply with
the specifications in the manual supplied with the product.
VARMECA 30 motors must be protected against excessive
stress. In particular, there must be no damage to parts and/or
modification of the clearance between components during
transportation and handling. Avoid touching the electronic
components and contact parts.
VARMECA 30 motors contain parts which are sensitive to
electrostatic stress and may be easily damaged if handled
incorrectly. Electrical components must not be exposed to
mechanical damage or destruction (risks to health!).

5 - Electrical connection

When work is performed on VARMECA 30 motors which are
powered up, national accident prevention specifications must
be respected.
The electrical installation must comply with the relevant
specifications (for example conductor cross-sections,
protection via fused circuit-breaker, connection of protective
conductor). More detailed information is given in the manual.
Instructions for an installation which meets the requirements
for electromagnetic compatibility, such as screening,
earthing, presence of filters and correct insertion of cabl es
and conductors, are given in the documentation supplied with
the VARMECA 30. These instructions must be followed in all
cases, even if the VARMECA 30 carries the CE mark.
Adherence to the limits given in the EMC legisl ation is the
responsibility of the manufacturer of the installation or the
machine.

6 - Operation

Installations incorporating VARMECA 30 motors must be
fitted with additional protection and monitoring devices as laid
down in the current relevant safety regulations: law on
technical equipment, accident prevention regulations, etc.
Modification of VARMECA 30 motors using control software
is permitted.
Active parts of the device and live power connections must
not be touched immediately after the VARMECA 30 is
powered down, as the capacitors may still be charged. In view
of this, the warnings fixed to VARMECA 30 motors must be
observed.
During operation, all protective covers must remain closed.

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3 - Transportation, storage

All instructions concerning transportation, storage and correct
handling must be observed.
The climatic conditions sp ecified in the technica l manual must
be observed.

7 - Servicing and maintenance

Refer to the manufacturer’s documentation.

37

LEROY-SOMER

INSTALLATION AND MAINTENANCE

VARMECA 30

Variable speed motor or geared motor

Notes

3776 en - 07.2007 / h

38

LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

CONTENTS

1 - GENERAL INFORMATION.............................................................................................................................. 40

1.1 - General operating principle............................................................................................................................. 40

1.2 - Product name................................................................................................................................................. 40

1.3 - Characteristics............................................................................................................................................... 41

1.4 - Environmental characteristics........................................................................................................................ 43

1.5 - Radio-frequency interference......................................................................................................................... 43

1.6 - Description of cables and protection devices................................................................................................. 46

1.7 - UL conformity................................................................................................................................................. 47

1.8 - Weights and dimensions................................................................................................................................ 48

2 - INSTALLATION................................................................................................................................................ 49

2.1 - General.......................................................................................................................................................... 49

3 - CONNECTIONS ............................................................................................................................................... 49

3.1 - Wiring precautions......................................................................................................................................... 49

3.2 - Control terminal blocks .................................................................................................................................. 50

3.3 - Power terminal blocks.................................................................................................................................... 52

3.4 - Terminal blocks for options............................................................................................................................ 52

3.5 - Wiring diagrams............................................................................................................................................. 53

3.6 - Power supply and control for FCR brake motors........................................................................................... 57

3.7 - Brake rectified voltage depending on the mains supply................................................................................. 58

3.8 - Example of supplying 2 motors, with or without brake, in parallel, with a single VARMECA......................... 59

3.9 - Wiring diagrams for SO VMA and VMA ESFR options.................................................................................. 60

4 - COMMISSIONING............................................................................................................................................ 62

4.1 - Starting with the power supply....................................................................................................................... 62

4.2 - Starting with remote volt-free contact ............................................................................................................ 62

4.3 - Starting with local run/stop control (BMA 31/32, BMA 33/34 or BMAVAR 31/32,

BMAVAR 33/34 OPTION) ............................................................................................................................. 62

4.4 - Setting the speed........................................................................................................................................... 62

5 - FAULTS-DIAGNOSTICS.................................................................................................................................. 63

6 - MAINTENANCE ............................................................................................................................................... 63

6.1 - Care............................................................................................................................................................... 63

6.2 - Measurements............................................................................................................................................... 63

7 - OPERATING EXTENSIONS ............................................................................................................................ 64

7.1 - Speed control knob option (B 31/32 or B 33/34)............................................................................................ 64

7.2 - Control knob with integrated run-stop control option (BMA31/32 or BMA 33/34) .......................................... 64

7.3 - Control knob with forward/reverse/stop control option (BMAVAR 31/32

or BMAVAR 33/34)........................................................................................................................................ 64

7.4 - Internal speed control option (CVI VMA 31/32 or CVI VMA 33/34) ............................................................... 64

7.5 - IP 65 braking resistor option (RF100 – RF 200 – RF 600) ............................................................................ 65

7.6 - IP 20 external braking resistor option (RF – BRR – 800 – 200)..................................................................... 65

7.7 - Electromechanical brake power supply and control option (SO VMA 31/32) ................................................ 65

7.8 - Additional I/O interface and sequential brake control option (ESFR VMA 31/32).......................................... 6

7.9 - Addit

7.10 - Fieldbus options................................ ... ... ... .... ...................................... .... ... ... ... ........................................... 65

7.11 - Encoder feedback option (COD VMA 33/34).............................................................. ... ... .... ... ... ... .............. 65

7.12 - Parameter-setting console option (PX LCD)................................................................................................ 66

7.13 - Parameter-setting software option (SOFTVMA 30) ... .... ... ... ... ..................................................................... 66

7.14 - Operator display option (PAD VMA 30) ....................................................................................................... 66

7.15 - XPress Key.................................................................................................................................................. 66

7.16 - EMC filter (FLT VMA 33/FLT VMA34) ......................................................................................................... 67

7.17 - EMC filter option (FLT VMA 31M)................................................................................................................ 67

7.18 - EMC filter option (FLT VMA 31/32).............................................................................................................. 67

ional I/O interface and sequential brake control option (ESFR VMA 33/34).......................................... 65

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39

LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

GENERAL INFORMATION

1 - GENERAL INFORMATION

• This manual describes the characteristics and installation of the VARMECA 31ML, 31M, 31TL, 31T, 32M, 32TL, 32T,

33TL, 33T, 34TL, 34T.

• The VARMECA 30 is designed to operate in an industrial environment. When used with an e xternal EMC filter,
the VARMECA 30 complies with standards for residential environment.

• If the run command has been enabled, the motor starts as soon as it is switched on.

1.1 - General operating principle

The VARMECA 30 is the physical association of a 3-phase
induction motor and an integrated variable speed drive.
The motor allows all kinds of mounting arrangement (foot or
flange) and can be combined with standard gearboxes from
the LEROY-SOMER range.
In the standard version, the drive with integrated control does
not require any connection other than the power supply.

The options may be used to broaden the application range of
the VARMECA 30.
Thanks to the advanced technology of the IGBT power
module, very high efficiency and reduced noise levels are
possible.

1.2 - Product name

Single-phase power supply

115 V ±10% - 50/60 Hz

Rating

31 ML 025 0.25 31 M 025 0.25 31 TL 025 0.25 31 T 025 0.25
31 ML 037 0.37 31 M 037 0.37 31 TL 037 0.37 31 T 037 0.37

Power (kW)

Single-phase power supply

200/240 V ±10% - 50/60 Hz

Rating Power (kW) Rating Power (kW) Rating Power (kW)

31 M 055 0.55 31 TL 055 0.55 31 T 055 0.55
31 M 075 0.75 31 TL 075 0.75 31 T 075 0.75
32 M 090 0.90 32 TL 090 0.90 31 T 090 0.90
32 M 110 1.1 32 TL 110 1.1 31 T 110 1.1
32 M 150 1.5 32 TL 150 1.5 32 T 150 1.5

3-phase power supply

200/240 V ±10% - 50/60 Hz

32 TL 180 1.8 32 T 180 1.8
32 TL 220 2.2 32 T 220 2.2
33 TL 300 3 32 T 300 3
33 TL 400 4 32 T 400 4
34 TL 550 5.5 33 T 550 5.5
34 TL 750 7.5 33 T 750 7.5

3-phase power supply

400/480 V ±10% - 50/60 Hz

34 T 900 9
34 T 111 11

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LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

GENERAL INFORMATION

OPERA T ING EXTENSIONS

Designation Description

B 31/32 or B 33/34 Integrated speed control knob
BMA 31/32 or BMA 33/34 Speed control knob and integrated run-stop control knob
BMAVAR 31/32 or BMAVAR 33/34 Speed control knob and integrated stop forward/reverse control knob
CVI VMA 31/32 or CVI VMA 33/34 Integrated speed control
ESFR VMA 31/32 or ESFR VMA 33/34 Brake control
RF100 – RF200 – RF600 Braking resistor Power 100, 200 and 600 W
RF – BRR – 800 – 200 Braking resistor Power 800 W – External mounting
PX LCD Parameter-setting console
COD VMA 33/34 Encoder feedback
SOFTVMA 30 Parameter-setting software
PAD VMA 31/32 or PAD VMA 33/34 Local display unit
PX KEY Copy key
SO VMA 31/32 Fixed brake control and power supply (3-phase supply 400-480 V only)
VMA COM PB 31/32 or VMA COM PB 33/34 Fieldbus: PROFIBUS DP
VMA COM IS 31/32 or VMA COM IS 33/34 Fieldbus: INTERBUS S
VMA COM DT 31/32 or VMA COM DT 33/34 Fieldbus: DEVICENET
VMA COM CN 31/32 or VMA COM CN 33/34 Fieldbus: CAN OPEN
FLT VMA 31M EMC filter for residential environment – Internal mounting (for VMA 31M)
FLT VMA 31/32 EMC filter for residential environment – Internal mounting (for VMA 31TL/T 32/TL/T)
FLT VMA 33 EMC filter for industrial environment – Internal mounting (for VMA 33 TL/T)
FLT VMA 34 EMC filter for industrial environment – Internal mounting (for VMA 34 TL/T)

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1.3 - Characteristics

1.3.1 - Electrical data

Power supply

Phase voltage imbalance - 3%
Output voltage From 0 V to input voltage From 0 V to input voltage

Power range (kW) 0.25 - 0.37* - 0.55 - 0.75 - 0.9 - 1.1 - 1.5
Maximum number of power-

ups per hour

*0.37 kW max. for 115 V supply (0,75 kW with 310M rating)
**7.5 kW max. for 230 V supply

Single-phase supply
110V -10 % to 120V +10 % 50-60Hz ± 2 %
208V -10 % to 240V +10 % 50-60Hz ± 2 %

10 100

1.3.2 - Characteristics and functions

Characteristics V ARMECA 30

- 10 to 80 Hz at constant torque (factory setting can be modified with parameter-setting

Motor frequency variation
range

Efficiency 97.5% motor efficiency
Overload

option)

- 10 to 50 Hz for general applications (factory setting can be modified with parameter-setting
option)

- 0 to Fmax depending on thermal and mechanical limits (Fmax = 400 Hz ; LEROY-SOMER to
be consulted anytime the applications requires the drive to run at more than 150 Hz)

150% of In for 60 s
10 times per hour

3-phase supply
208V -10 % to 240V +10 % 50-60Hz ± 2 %
380V -10 % to 480V +10 % 50-60Hz ± 2 %

0.25 - 0.37 - 0.55 - 0.75 - 0.9 -1.1 - 1.5 - 4 -

5.5 - 7.5** - 9 - 11

41

LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

GENERAL INFORMATION

Pilot control VARMECA 30

- Analogue reference (0 V or 4 mA) = Minimum speed
(10 V or 20 mA) = Maximum speed

- 0 to 10 V with integrated potentiometer (B31/32 – B33/34 option)

Speed reference

Speed regulation

Run/Stop

Forward/Reverse

Stop mode

Ramps - Ramps adjustable from 0 to 600s
Fieldbus - PROFIBUS DP, INTERBUS S, DEVICENET, CAN OPEN, MODBUS RTU, LS NET

- 0 to 10 V with remote potentiometer

- 4 to 20 mA with external reference

- Reference with internal potentiometer

- Digital references

- Fieldbus

- Speed regulation with encoder feedback option for VMA 33 or 34 only

- Regulation of a reference with integrated PI loop

- With power supply

- With remote volt-free contact

- With fieldbus

- With local run/stop control

- With internal connection on the terminal block

- With remote volt-free contact

- With fieldbus

- With local run/stop control

- On ramps (using volt-free contact or integrated control)

- Freewheel

- With electromechanical brake

Protection VARMECA 30

- Undervoltage (see notice 3847)

- Overvoltage (see notice 3847)

- Overloads (see notice 3847)

Power

Control - Short-circuit on 0-10 V/24 V inputs or outputs
Drive reset

.thermal, drive and motor
.protection against locked rotor

- Short-circuit
.motor windings

- Overspeed (see notice 3847)

- By switching off the VARMECA 30 or by opening/closing the connection between the 24V
and ENA (VMA 31/32) terminals or SDI 1 and SDI 2 (VMA 33/34) terminals

42

LEROY-SOMER

INSTALLATION AND MAINTENANCE

VARMECA 30

Variable speed motor or geared motor

GENERAL INFORMATION

1.4 - Environmental characteristics

Characteristics Level

Index of protection IP 65
Storage temperature - 40 °C to + 70 °C Conforming to standard IEC 68-2-1.
Transport temperature - 40 °C to + 70 °C
Operating temperature - 20 °C to + 50 °C (with power derated by 1% per °C, above 40 °C)

< 1000 m without derating.

Altitude

Ambient humidity 95% non condensing
Humidity during storage 93%, 40 °C, 4 days

Vibration

Shocks

Immunity Conforming to EN61000-6-2
Radiated and conducted

emissions
UL standards Conforming to UL 508 C (E211799)

The maximum authorised altitude is 4000 m, but above 1000 m, the continuous output current
should be derated by 1% per additional 100 m over 1000 m (eg: for an altitude of 3000 m,
derate by 20%).

- Exposed product: 0.01 g

- Sinusoidal vibration:

• VMA 31/32 : 2-9 Hz 3,5 ms

• VMA 33/34 : 2-6 Hz 3,5 ms-2 - 6-100 Hz 5 ms
in accordance with standard IEC 68-2-6.

Packaged product: 15 g, 6 ms, 500 times/direction in all 6 directions in accordance with
standard
IEC 68-2-29.

Conforming to EN50081-2 with internal filter

2

/Hz 1 hr in accordance with standard IEC 68-2-34.

-2

- 9-100 Hz 10 ms

-2

-2

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1.5 - Radio-frequency interference

1.5.1 - General

Variable speed drives use high-speed switches (transistors,
semi-conductors) which switch high voltages (around
550VDC for 3-phase drives) at high frequencies (several
kHz). This provides better efficiency and a low level of motor
noise.

As a result, they generate radio-frequency signals which may
disturb operation of other equipment or distort measurements
taken by sensors:

- due to high-frequency leakage currents which escape to
earth via the stray capacity of the drive/motor cable and that
of the motor via the metal structures which support the motor

- by conduction or feedback of R.F. signals on the power
supply cable: conducted emissions

- by direct radiation near to the mains supply power cabl e or
the drive/motor cable: radiated emissions
These phenomena are of direct interest to the user.
The frequency range concerned (radio frequency) does not
affect the energy distribution company.

Conformity of the drive is only assured when the
mechanical and electrical installation instructions

described in this manual are adhered to.

43

LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

GENERAL INFORMATION

1.5.2 - Standards (Emission)

The maximum emission level is set by the generic industrial (EN 50081-2) and residential (EN 50081-1) standards.
VARMECA 30 conforms to the following standards:
EN 50081-2, EN 61000-6-4 - EN 61800-3, IEC 61800-3.

Emission

Conformity conditions according to the

switching frequency

Standard Description Application

Second environment with
unrestricted distribution (DENR)

Second environment with

EN 61800-3 Variable speed drive standards

EN 50081-1 Generic emission standards for
EN61000-6-3

EN 50081-2 Generic emission standards for
EN 61000-6-4

residential, commercial and light
industrial environments

the industrial environment A.C. supply

restricted distribution (DER)
First environment with

unrestricted distribution (R)
First environment with restricted

distribution (I)

A.C. supply -

VMA 31/32 ≤ 10kHz
VMA 33/34 ≤ 11kHz

VMA 31/32 ≤ 10kHz
VMA 33/34 ≤ 11kHz

VMA 31/32 ≤ 4kHz

VMA 33/34 ≤ 4,5kHz

VMA 31 ≤ 8kHz
VMA 32 ≤ 4kHz

VMA 33/34 ≤ 4,5kHz

With EMC filter

Internal External

VMA 31/32 ≤ 10kHz
VMA 33/34 ≤ 11kHz

VMA 31/32 ≤ 10kHz
VMA 33/34 ≤ 11kHz

-

VMA 31/32 ≤ 4kHz

VMA 33/34 ≤ 4,5kHz

VMA 31/32 ≤ 10kHz
VMA 33/34 ≤ 11kHz

VMA 31/32 ≤ 4kHz

VMA 33/34 ≤ 11kHz

VMA 31/32 ≤ 10kHz
VMA 33/34 ≤ 11kHz

The second environment includes industrial networks supplied with low voltage but which do not serve buildings

for domestic use. Operation of a dr iv e with out an EMC filte r in this ty pe of e nvironment may resu lt in inte rference
on certain electronic appliances located near the drive whose immun ity level might not be compatible with industrial
conditions. If it proves impossible to filter the disturbed element, add an external EMC filter.

44

LEROY-SOMER

INSTALLATION AND MAINTENANCE

3776 en - 07.2007 / h

VARMECA 30

Variable speed motor or geared motor

GENERAL INFORMATION

1.5.3 - Standards (Immunity)

The minimum immunity level is set by the generic industrial (EN 51000-6-2) and residential (EN 51000-6-1) standards.
VARMECA 30 conforms to the following standards:
EN 61000-4-2, IEC 61000-4-2 - EN 61000-4-3, IEC 61000-4-3 - EN 61000-4-5, IEC 61000-4-5 - EN 61000-4-6, IEC 61000-4-6 EN
61000-4-11, IEC 61000-4-11 - EN 61000-6-2, IEC 61000-6-2 - EN 61000-3, IEC 61000-3.

Immunity

Standard Description Application Conformity

IEC 61000-4-3 Immunity standards for radiated
EN 61000-4-3
IEC 61000-4-6 Generic immunity standards for
EN 61000-4-6
EN 50082-1 Generic immunity standards for

EN 61000-6-1
EN 50082-2

EN 61000-6-2
EN 61800-3

EN 61000-6-2
EN 61000-4-4 Bursts of fast transients Control cable Level 4 (hardened industrial)

EN 61000-4-5 Shock waves Phase-earth power supply cable Level 4

radio-frequency

conducted radio-frequency

residential, commercial and light
industrial environments

Generic immunity standards for the
industrial environment

Variable speed drive standards Conforms to the first and second environmentIEC 61000-6-2

shielded cables outside product

Product casing Level 3 (industrial)

Control and power cables

- ConformsIEC 61000-6-1

- ConformsIEC 61000-6-2

Power cable Level 3 (industrial)

Phase-to-phase power supply

cable

Earth signal circuits

(refer to section 1.5.5)

Level 3 (industrial)

Level 3

Level 2

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1.5.4 - Earth leakage current

Earth leakage currents may depend on the type of EMC filter
used. The VARMECA 30 can be supplied with its filter
integrated and wired-up. The levels of leakage current also
depend on the voltage and/or the power supply frequency
and the size of the motor.
In all cases, for conformity with immunity standards, a voltage
limiting device is connected to earth. The shunt current is
negligible in normal circumstances.

1.5.4.1 - use of earth leakage detector (residual current
device)

1- Type AC: which detects AC faults. Not to be used with
variable speed drives.
2- Type A: which detects AC faults and pulsed DC faults
(provided that the DC is cancelled out at least once per cycle).
Only for use with single-phase drives.
3 - Type B: which detects AC faults, pulsed DC faults and
smoothed DC faults. Only this type is suitable for use with

all variable speed drives.

Note: If an external EMC filter is being used, a delay of 50 ms
should be incorporated to avoid spurious faults being taken
into account.

1.5.5 - Control cable immunity

Control cable immunity can be increased outside the
VARMECA 30 by one of the following 2 methods:

• Use of shielded twisted pair cable, with shielding connected
to earth around its circumference within 100 mm of the
VARMECA 30.

• Passing the cable through a ferrite ring at 100 mm maximum
distance from the VARMECA 30.

Note: Several control cables can pass through a single
ferrite.

1.5.6 - Control circuit immunity when
overvoltage occurs

Immunity to overvoltages in control circuits or in long cables
connected to the outside of a building.
The various drive input and output circuits conform to
standard EN61000-6-2 (1 kV) relating to overvoltages.

There are some exceptions, where the installation may be
exposed to overvoltage peaks which exceed the levels
determined by the standard. This may be the case in the
event of lightning strikes or earth faults associated with long
cable lengths (>30 m). To limit the risks of damage to the
drive, the following precautions could be taken:

45