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.
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 Intrinsically Safe Power Supply CPS-A is designed for use in underground coalmines. It is supplied from 110 V ac and provides an intrinsically safe output.
The enclosure is polycarbonate and has a dimension of 125 x 105 x 120 mm.
The power supply consists of two circuit boards. The input board contains switch mode power supplies, while the output board contains over voltage and over current protection circuits.
Depending on the selection of fuse rating for the main power supply output, transformer T1, and values of resistances R5, R12, R28, R29 and R62 the power supply may be configured to provide 12 V and 15 V output. The models are distinguished by the output voltage and current marking.
It is a condition of safe use that the following parameters shall be taken into account during installation:
Maximum supply voltage Um
132 V a.c.
12 V / 2.4 A
12 V / 2 A
15 V / 1.5 A
15 V / 0.5 A
15 V / 0.47 A
Maximum output voltage Uo
Maximum output current Io
Maximum external capacitance Co
Maximum external inductance Lo
Maximum external inductance and resistance ratio Lo/Ro
The following documents were assessed in the course of preparing this
certificate. The documents listed give a full and correct specification of the
safety aspects of the electrical equipment.
IS Power Supply - Input
IS Power Supply - Output
ISP1-Z-004 3 sheets
(PCB Artwork Input Board)
ISP1-Z-005 6 sheets
(PCB Artwork Output Board)
ISP1 IS Power Supply
ISP1 Main Transformer
Construction – 12V
ISP1 Main Transformer
Construction – 15V
ISP1 Auxiliary Transformer
ISP1 Marking (Labels)