Presafe 17 ATEX 9970X KTEX DKEX

Presafe 17 ATEX 9970 X issue 3
This certificate may only be reproduced in its entirety and without any change, schedule included.
DNV Product Assurance AS, Veritasveien 3, 1363 Høvik, Norway, Tel [phone], www.dnv.com
ICP-4-5-i1-ATEX-f2, rev 1
Page 2 of 4
[13] Schedule
[14]
EU-Type Examination Certificate No:
Presafe 17 ATEX 9970 X
Issue 3
[15] Description of Product
The centrifugal (radial) fan with axial air intake is intended for ventilation purposes. It consists of Ex certified
electric cage motor and fan casing with impeller. Cooling is achieved by heat exchange, using convection
current of the transported air.
The impeller is mounted directly on the motor designed for fans and protected from the mechanical
damage by metallic enclosure (“fan casing in form of rectangular duct”). Fan casing is made of
galvanized steel sheets and fixed to motor by fastening screws. Fans must not be installed outdoors.
The impeller is squirrel cage shape and it is made of galvanized steel sheets in five (diameter) sizes
225, 250, 280, 315 and 355 mm. Intake cone as the closest to the impeller made of copper to comply
with permissible material pairings (acc. to EN 14986:2017).
Electric motors used are three phase asynchronous motors with 4 or 6 poles:
-MK106-4DK.07.Y or MK106-4DK.14.Y cert. acc. to PTB 08 ATEX 3061
-MK137-4DK.10.Y, MK137-4DK.20.Y and MK137-6DK.20.Y cert. acc. to PTB 08 ATEX 3062
Temperature sensors (3xPTC) embedded in the windings shall be connected to trigger device conforming
to EN 50495:2010.
In order for the fan’s permitted current and power consumption not to be exceeded the fan may need to be
pressurized with a minimum back pressure according to table 1 in [15].
The fans can be speed controlled by reduction of supply voltage by transformer or three phase AC
controller. Speed control using frequency inverter is not permitted.
If the free end of the permanently connected cable terminates in hazardous area it shall be protected by
type of protection listed in clause 1 of EN 60079-0:2018.
Type designation: KTEX and DTEX
Models: DKEX 225-4, DKEX 250-4, DKEX 280-4, DKEX 315-4, DKEX 355-6.
KTEX 50-25-4, KTEX 50-30-4, KTEX 60-30-4, KTEX 60-35-4, KTEX 70-40-6.
Electrical Data (rating) and ambient temperature are specified in Table 1:
Model
Phase
Supply voltage
Rated
current
Power
Back pressure
required
Tamb
DKEX 225-4
3
380-400V (Y) AC
50Hz 230V (Δ) AC
50Hz
0.88 A
1.52 A
0.5 kW
125 Pa
-20°C to +40°C
DKEX 250-4
3
380-415V (Y) AC
50Hz 230V (Δ) AC
50Hz
1.80 A
3.10 A
0.9 kW
60 Pa
-20°C to +40°C
DKEX 280-4
3
380-415V (Y) AC
50Hz 230V (Δ) AC
50Hz
2.25 A
3.90 A
1.3 kW
300 Pa
-20°C to +40°C
DKEX 315-4
3
380-415V (Y) AC
50Hz 230V (Δ) AC
50Hz
3.90 A
6.80 A
2.1 kW
300 Pa
-20°C to +40°C
DKEX 355-6
3
380-415V (Y) AC
50Hz 230V (Δ) AC
50Hz
3.76 A
6.50 A
1.8 kW
-
-20°C to +40°C
KTEX 50-25-4
3
380-400 (Y) AC 50Hz
230V (Δ) AC 50Hz
0.88 A
1.52 A
0.5 kW
110 Pa
-20°C to +40°C