Page 11 - 3-5kV Induction Motor

The Customer/Motor Manufacturer is responsible for obtaining such re-certification; Iris can offer a
consulting service to customers, advising them on the best layout of sensors to get a good PD signal,
and can supply junction boxes and monitoring units which are ATEX-certified (at component level).
However, the Customer/Motor Manufacturer must assure that their installations in hazardous areas
meet all the requirements specified by local regulations and ATEX standards.

IRIS component list for monitoring stator PD on motors
rated 3.3kV and above with ATEX certifications

Part No. Description Comments

IRIS sensor Kit and PD Signal Termination Unit

B0602 Bus Coupler Package (Bus up to 6.9 kV) including: (no termination box)
3 Epoxy-mica capacitors (80 pF, 6.9 kV) and
installation kit.
B0702 Bus Coupler Package (Bus between 7 & 16 kV) (no termination box).
including: 3 Epoxy-mica capacitors (80 pF, 16 kV)
and installation kit.
ZAX653 ATEX/IECEx hazardous location stainless steel Quote with B0602,
standard termination box with 3 outputs. B0702,
Does NOT include conduit hubs.
Termination box has markings Ex nA IIC T5 Gc IPP66
based on EN 60079-0:2009, EN 60079-15:2010,
IEC 60079-0:2010 and IEC 60079-15:2010.
PDTrac continuous monitoring system

ZAX3005 ATEX/IECEx hazardous location PDTracII Quote with B0602,
continuous on-line PD monitor. Complete with stainless steel B0702, ZAX653
IP66 enclosure, shock mounts, 6 foot extension cable kit, PD
sensor inputs, ambient temperature and humidity sensor input
(0-1 V), alarm relay, USB and Ethernet ports, Modbus TCP/IP
protocol, and software for configuration and analysis.
To be used with three Iris Power PD couplers (80 pF EMCs),
or Iris Power approved equivalent.
PDTracII has markings Ex nA nC IICT5 Gc IP66
based on EN 60079-0:2009, EN60079-15:2010,
IEC 60079-0:2010 and IEC 60079- 15:2010

References to EN 60079-19 Standard
(Explosive Atmospheres: Equipment Repair, Overhaul and Reclamation)
Below are listed some regulatory points to consider when installing a diagnostic system as described
before on a motor in a plant already operating in an explosive area.

The installation of PD sensors falls under Section 3.7 of the Standard: "Modifications: changes to the
design of the equipment which affects material, fit, form or function".
Since the motor certificate describes its specific structure and build, any change made to the motor
could not be in accordance with the structure described in the certification. If the motor undergoes a
modification, this must be compliant with the provisions of Section 4.3.3. of the said Standard, where it
states that a new certificate must be issued or, failing this, that the motor is not suitable anymore for
operating in potentially explosive areas.

Mot/Atex/info082013 pag. 3