Certificate history:
Ex ia IIC T4 Ga (-30ºC ≤ Ta ≤ See Annex)
This certificate is issued as verification that a sample(s), representative of production, was assessed and tested and found to comply with the IEC Standard list below and that the manufacturer's quality system, relating to the Ex products covered by this certificate, was assessed and found to comply with the IECEx Quality system requirements. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
This Unit verification certificate is issued as verification that the Apparatus identified on page 1, was assessed and tested and found to comply with the IEC Standard list below. This certificate is granted subject to the conditions as set out in IECEx Scheme Rules, IECEx 02 and Operational Documents as amended.
STANDARDS: The electrical apparatus and any acceptable variations to it specified in the schedule of this certificate and the identified documents, was found to comply with the following standards:
As this is a Unit Verification Certificate, no QAR is applicable as this certificate is specific to the items listed by serial number or other unique identification.
The range designated as the SD**xxx Series Surge Protection Devices are designed to protect instrumentation and electronic systems from surges and transients conducted through signal cables. The apparatus comprises a printed circuit board (p.c.b.) upon which are mounted all of the electrical components. The units use two and three terminal gas discharge tubes, diodes, zener diodes, resistors and inductors for operational purposes and may be optionally encapsulated. The p.c.b. is housed within a plastic enclosure with two groups of three terminals (1, 2 & 3 and 4, 5 & 6) at either end of the enclosure, for the connection of the interconnecting cables. An earth shoe is fitted to the apparatus to enable connection of an earth bonding conductor with a cross sectional area of at least 4mm². The SD**xxx Series comprises:- SD**X (two wire and earth with Li = 0.22mH) and SD**T3 (three wire and earth with Li = 0.22mH). The apparatus in each of these series, differ only in the operating voltage. The “**” in the apparatus title indicates the nominal voltage the apparatus is designed to work at. For example a unit marked SD07R has a nominal working voltage of 7V and an operating voltage of 7.5V. The working voltage and operating voltage of the devices are not critical for the safety assessment. Three further units are included the SD**R, SD**R3 and SDrtd. The range designated as the SD**Mxxx Series Surge Protection Devices are designed to protect instrumentation and electronic systems from surges and transients conducted through signal cables. The SD**Mxxx Series Surge Protection Devices are based on a module construction and comprise a ‘module base’ unit which has four options and a plug in surge ‘module insert’ which has thirty two options. Once the ‘module insert’ is installed into the ‘module base’ unit it is retained in place by a locking bar. The SD**xxx Series Surge Protection Devices and SD**Mxxx Series Surge Protection Devices may be located in a hazardous area.For the full details of the units covered, the Input and output parameters and the Ambient Temperature limits, see the Annex.
