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If the motor is provided with just a terminal board having just
the 6 mains pins the connection of thermal protection and
heaters have to be made by welding the wires of auxiliary
devices with the wires of the cable and insulate using a heat-
shrink sheath.
Protection
The motor must be protected by a tripping device that in
case of breakdown, cut off the supply of the motor so that the
surface temperature of the parts in contact with the explosive
atmosphere doesn't reach the ignition temperature.
Motors for inverter duty
In case the motors are supplied by inverter, they shall be
provided with protectors inside the windings (normally PTC
thermistors), capable of assuring the respect of temperature
class limits. Such devices shall be connected to a control
device able to cut off power to the motor in case of reaching of
the limit temperature. The permissible operating characteristics
in this mode are stated on the nameplate or an additional label.
Output filters must be installed based upon the length of the
cable on the motor side of the VFD. Filter selection and the
maximum cable length depend on the instructions and data
provided by the VFD manufacturer. To prevent stray circulating
currents, it is recommended to use appropriate measures on
the power supply that allow to significantly reduce the
triggering cause. For this purpose contact your local VFD
supplier.
Heaters
The heaters shall be supplied only when the motor is not
under power. Tha cables have to be adequate for a power of
25W with supply that can be from 110V up to 240V (±10%).
Permissible load
Assuming a life-span of 20.000h for 2P motors and 40.000h for
4,6,8P motors:
ù
Max
Max
Motor
radial
axial
Bearing
size
load
load
in L/2
Thrust
63
6202
365
230
71
6202
450
280
80
6204
590
370
90
6205
645
400
100
6206
920
560
112
6306
1280
700
132
6308
1345
770
160
6309
2465
1401
180
6310
3000
1498
Allowed duty services
S1: Continuous duty the motor works at a constant load until
thermal equilibrium is reached.
S2: Intermittent duty: Once started, the motor works at a
constant load for a limited period and thermal equilibrium is not
reached. Motor will be started a second time then when its
temperature has decreased to room temperature.
S3: Intermittent duty: A sequence of identical duty cycles,
made up with a time of operation at constant load and a time at
rest. When at rest, the motor is not fed. Starting current does
not significantly influence temperature rise.
S9: Load and speed vary periodically within the permissible
operating range. Frequent overloading may occur. Tipical of
motors supplied by inverter.
Motors with forced ventilation (IC416)
In case of motors with forced ventilation, the main motor can
be supplied only when the auxiliary ventilation is already
working.
2
5. MARKING
Marking of conformity to the
(*)
European Directives
Specific marking of explosion
(*)
protection
Motor for surface plants (different
from mines)
II (*)
2 (*)
Category 2: high level of protection
explosive atmosphere due to
G (*)
presence of combustible gas vapour
or mist
Ex db
Flameproof motor and terminal box
Flameproof motor, increased safety
Ex dbeb
terminal box
IIC
Gas group, suitable for IIB and IIA
T3, T4,
Temperature class
T5
explosive atmosphere due to
D (*)
presence of combustible dust
Ex tb
tb enclosures suitable for zone 21
IIIC
(cat. 2D)
T125° C
Max surface temperature
T.amb
Ambient temperature
AB : laboratory which issues the CE
type certificate
AB xx yyy
xx : year of issue of certificate
yyy : number of CE type certificate
Notified Body that gives the Product
ZZZZ (*)
Quality Assurance Notification
(*) Only for ATEX marking
6. MAINTENANCE AND REPAIR
MAINTENANCE shall be performed only by qualified
people in accordance with the standard IEC/EN 60079-17 or
Max
national standards (last edition).
axial
Qualified people must have knowledge about electrical
load
apparatus
for
explosive
atmospheres
Pull
installations in hazardous areas.
120
- Every 3000 hours of service verify and restore, if necessary,
160
the grease on the radial seals (for example V-rings).
220
Periodically (depending on the environment and duty) verify:
230
- motor cleanliness (oil, DUST, dirt and machining residuals
350
absence) and free passage of cooling air
480
- correct tightening of electrical connections, of fastening
590
screws
714
615
- free motor running with low vibration (v eff<3,5mm/s for
Pn<15KW v eff<4,5 mm/s for Pn>15KW) and absence of
anomalous noises; where there is high vibration and/or noise
verify the motor fastenings, machine balancing and that the
bearings are in good condition.
- The bearings must be inspected once per 3000h operation.
REPAIRS shall be made in accordance with the rules as
defined in EN 60079-19 standard.
These repairs can only be done under the control and
authorization of Orange1 EM or by certified repair workshop.
When the repair is made by a certified repair workshop, they
must respect all the original characteristic of the motor and
use only original spare parts.
Furthermore they have to place an additional nameplate on
the motor with written a symbol to identify the Repair,
company name and certification,
repair operation number
and date.
Nothing regarding the type of protection can be modified.
In case all these rules are not respected, the motor loses all its
characteristic of certification.
FLAMEPROOF JOINTS CANNOT BE REPAIRED
7. MODULAR COMPONENTS
The motors are completely modular.
Feet and flanges can be mounted without affecting the ATEX
certificate, as they are external and are not part of the type of
protection.
In the table here below we show you the screws to be used to
mount the different modular components.
Motor
Flange
Feet
Size
63-71
M5x16
M6x16
80-90
M6x20
M6x20
M8x30
100
M8x20
DADO M8
112
M8x20
M8x35 NUT M8
132
M10x20
M10X50 NUT M10
n.3 M10x95
160
M10x70 + NUT M10
n.1 M10x70
n.3 M10x95
180
M10x70 + NUT M10
n.1 M10x70
Screws class 8.8
8.
MANUFACTURING DATE
The manufacturing date is shown on the motor nameplate
indicating Month and year of manufacture: MM-YY
and
electrical
Terminal box Cover
M5x14
M5x14
M5x14
M5x14
M6x16
M6X20
M6X20
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