Ex-Approval (Doc.nO.: 6051401R02) - Wilo EMU FA Serie Instrucciones De Instalación Y Funcionamiento

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• Keeping within the thresholds stated in
IEC 60034-17 for the voltage peaks and rise
speed (output filters may be necessary).
• Varying the pulse frequency of the frequency
converter.
• Using our external double-bar electrode for faults
with the sealing chamber monitor.
The following construction measures could also
help to reduce or prevent faults:
• Separate power supply cable for main lead and
control lead (depending on the motor size).
• Sufficient distance between main lead and con-
trol lead.
• Using shielded power cables.
Summary
• Continuous operation up to rated frequency
(50 Hz or 60 Hz), observing the min. flow speed
• Consider additional measures with regard to EMC
(choice of frequency converter, using filters, etc.).
• Never exceed the rated current or rated speed of
the motor.
• It must be possible to connect the motor's own
temperature monitor (bimetal or PTC sensor).

10.3. Ex-approval (Doc.no.: 6051401R02)

This section contains special information for
owners and operators of pumps which have been
built and certified for use in environments where
explosions may occur.
It expands on and therefore supplements the
standard instructions for these pumps. It also
expands on and supplements the "General safety
information" section and must be read and fully
understood by all users and operators of the
pump.
This section applies only to Ex-rated pumps
and contains additional instructions for these
pumps!
10.3.1. Identification of Ex-rated pumps
Pumps that have been approved for use in an
explosive atmosphere are be marked as follows on
the rating plate:
• "Ex" symbol of the corresponding approval
• Information on Ex classification
• Certification number
10.3.2. ATEX approval
The motors are certified for use in atmospheres at
risk of explosion in accordance with EC direc-
tive 94/09/EC, which requires device group II,
category 2.
The motors can be used in both zone 1 and
zone 2.
These motors may not be used in zone 0!
Non-electrical devices (e.g. hydraulics) also com-
ply with EC directive 94/09/EC.
ATEX classification
The Ex classification, for example,
II 2G Ex de IIB T4 Gb on the rating plate indicates
the following:
68
• II = device group
• 2G = device category (2 = suitable for zone 1,
G = gas, vapor and mist)
• Ex = explosion-protected device complying to
Euro norm
• d = ignition protection type for motor casing:
Pressure-resistant encapsulation
• e = ignition protection for terminals: Increased
safety
• II = intended for places where explosions may
occur, with the exception of mines
• B = intended for use with gases in sub-group B
(all gases excluding hydrogen, acetylene, carbon
disulfide)
• T4 = max. surface temperature of the device is
135 °C
• Gb = device protection level "b"
"Pressure-resistant encapsulation" protection
class
Motors in this protection class must be equipped
with a temperature limiter
Non-immersed operation
To allow pumps to be operated within potentially
explosive areas with a non-immersed motor, the
following must be observed:
• Non-immersed operation is only possible with the
following motors: T 12, T 13, T 17, T 20.1, T 24,
T 30, T 34, T 42, T 50 and T 50.1.
• The motor must be fitted with a dual-circuit tem-
perature monitor (control and limitation).
The temperature controller can switch the motor
back on automatically. The maximum starts
per hour (15/h with a 3-minute pause) must be
observed.
• During non-immersed operation, the max. fluid
and ambient temperature must not be exceeded.
The max. ambient temperature corresponds to
the max. fluid temperature.
The following applies to the motor T 12: During
non-immersed operation, the fluid and ambient
temperature must not exceed 30 °C!
Certification number
The certification number of the approval is locat-
ed on the rating plate, in your order confirmation
as well as on the technical data sheet.
10.3.3. Electrical connection
ELECTROCUTION hazard!
Incorrect electrical connections can cause fa-
tal electric shocks. Electrical connections may
only be carried out by a qualified electrician
who is approved by the local power supplier,
in accordance with locally applicable regula-
tions.
In addition to the information in the "Electrical
connection" section, the following points must be
observed for Ex-rated pumps:
• The power supply cable must be connected
outside the potentially explosive area, or inside
APPENDIX
WILO SE 05/2014 v05 DIN A4