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Transcript
Safety Screening Report
Report:
071-75924520-601
Date:
18/12/2013
Client:
The Electrical Safety Council
Unit 331 Great Guildford Business
Square 30 Great Guildford Street
London
SE1 0HS
Product:
Electrical Socket
ESC Sample
Number:
9
Summary:
TÜV SÜD Product Service was commissioned by The Electrical Safety Council to
evaluate an Electrical Socket (see figure 1). The aim of the assessment is to assess the
product against the clients Safety Screening Test Plan.
Summary
The product was of adequate external construction and the internal construction was poor. Several
markings were also missing from the product. The product failed to meet its own stated maximum
output current.
Figure 1
Assessed by:
Reviewed by:
Anna Jeeves
Consumer Product Technician
Greg Plummer
Consumer Product Test Engineer
Colour Code
Red
= Fail/Major Fault
Amber
= Improvements Required
Green
© 2013 Not to be reproduced except in full without the permission of TÜV SÜD Product Service
= Pass
Page 1 of 6
The findings expressed in this report are our considered opinions and are based on our assessment of the samples and / or
documentation supplied to us at the time of the assessment. A full or further investigation of the product and / or
documentation may result in additional findings.
Report No: 071-75924520-601
Client:
ESC Sample Number:
Testing Information
TÜV SÜD Product Service
Octagon House, Concorde Way, Segensworth North, Fareham, Hampshire,
PO15 5RL. UK.
The Electrical Safety Council
9
Product Description:
Rated Input Voltage:
Rated Output:
Protection Class:
Product Information
Single Wall Socket with a USB Port
250VAC
Unknown, USB sockets 1.2A
Class I
Testing Laboratory:
Location:
Marking of Product
Comments
Findings
Markings/Warnings
(BS 1363-2, Clause 7)
-Inadequate -Poor -Adequate -Good -Very Good -N/A
The product was marked with model reference, distributor name, and
BS1363. The electrical ratings for the socket were given; however the USB
ratings were not present (packaging / instructions only). This information
should be made visible for the end user after installation. The WEEE logo
and CE marking was also missing.
An instruction leaflet was provided which included an adequate amount of
information regarding the products technical specification and installation.
Markings/Photo
Both the packaging and instructions stated that the product was suitable
for mobile phones, Blackberry’s, iPods, iPhones, PDA’s and MP3’s. A
statement was present to advise the user that the product will trip should
the current exceed 1.2A.
-Yes -No
CE Marking
-Yes -No
If yes see last page of report
Product Build Quality
Comments
Construction
(BS 1363-2, Clause 13)
-Pass
-Fail
The external construction was of an adequate standard and considered
comparable to similar products already on the market. No sharp edges or
burrs were found; however a minor amount of excess material around the
USB aperture was noted.
© 2013 Not to be reproduced except in full without the permission of TÜV SÜD Product Service
Page 2 of 6
The findings expressed in this report are our considered opinions and are based on our assessment of the samples and / or
documentation supplied to us at the time of the assessment. A full or further investigation of the product and / or
documentation may result in additional findings.
Report No: 071-75924520-601
Constructional
Quality
Comments
Constructional
Quality
Comments
Constructional
Quality
Comments
-Pass
Accessibility of Live Parts
(BS 1363-2, Clause 9)
-Fail
The product was constructed with shutters which functioned
simultaneously with the operation of the earth. Access to internal live parts
could not be achieved when applying a 1.0mm calibrated test pin to
openings exposed when installed.
Terminals & Terminations
(BS 1363, Clause 11)
-Pass
-Fail
A number of BS 1363 plugs could be inserted fully into the socket with no
issues found. The input conductors were constructed in brass; however the
grub screws appeared to be made of zinc and not brass as expected.
-Pass
Internal Wiring / Separation
(BS EN 61558-1, Clause 21)
-Fail
The output (SELV) circuit was found to be adequately separated from the
input circuit and the protective earth. The PCB was fully encased between
the socket face and back mouldings. The internal wiring was verified online
as being UL approved.
Screws, Current Carrying Parts & Connections
(BS 1363-2, Clause 13)
Constructional
Quality
Comments
Constructional
Quality
Comments
-Pass
-Fail
The connections to the PCB were found to be mechanically secured and
soldered. The output conductors were adequately secured within the
mouldings. The connections from the PCB were secured to the output
conductors and crimp terminals which were pressed onto the receiving plug
pin conductors.
Creepage Distances, Clearances & Distances Through Insulation
(BS EN 61558-1, Clause 26)
-Pass
-Fail
The minimum creepage / clearance distance measured between the
primary and secondary side of the circuit board (7mm) with a 1.3mm slot
was found to be within the limit of the standard >5mm. The transformer
was constructed with a triple insulated winding therefore providing an
adequate barrier from the primary winding.
© 2013 Not to be reproduced except in full without the permission of TÜV SÜD Product Service
Page 3 of 6
The findings expressed in this report are our considered opinions and are based on our assessment of the samples and / or
documentation supplied to us at the time of the assessment. A full or further investigation of the product and / or
documentation may result in additional findings.
Constructional
Quality
Comments
Result
Comments
Result
Comments
Result
Comments
Result
Comments
Short Circuit, Overload and Thermal Protection
(BS EN 61558-1, Clause 15)
-Pass
-Fail
A fusible resistor was suitably fitted to the primary side of the circuit.
Although not a requirement it is recommended that a thermal protective
device is incorporated into the circuit.
Mechanical Strength
(BS 1363-2, Clause 20)
-Pass
-Fail
A standard USB connector was placed in to the socket and subjected to an
impact test of 5Nm to all sides then around the socket and facia. No
damage was observed.
Insulation Resistance / Leakage Current
(BS EN 61558-1, Clause 18.2)
-Pass
-Fail
The product was subjected to an insulation resistance test with a voltage of
500VDC applied. This was measured between live / neutral and the USB
output. A measurement of >999MΩ was recorded across each path;
therefore meeting the requirement of >5MΩ.
Electric Strength
(BS 1363-2, Clause 15 / BS EN 61558-1, Clause 18)
-Pass
-Fail
The product as a whole was subjected to an electric strength test to
1500VAC. The output was tested to 4242VDC. No breakdown or flashover
occurred.
Output Voltage & Current Under Load
(BS EN 62684, Clause 5)
-Pass
-Fail
The device was plugged in and the open circuit voltage measured across
the USB ground and supply. It was found to be 5.241VDC and was between
the limits of 4.75 – 5.25VDC.
The maximum stated output current was 1200mA which is within the
required limit of 1500mA.
Under short circuit conditions the product drew <50mV <1mA from the USB
port. The maximum sustainable load was just over 1.01A. At approximately
1.09A the port started to trip out, presumably due to a current limiting
device.
The device was setup with a load bank and the load slowly increased until
the voltage output dropped significantly. The load was then backed off until
the voltage remained stable at a current of 1A and left to run. The
temperature was monitored around the device. After 8 hours the test was
stopped.
© 2013 Not to be reproduced except in full without the permission of TÜV SÜD Product Service
Page 4 of 6
The findings expressed in this report are our considered opinions and are based on our assessment of the samples and / or
documentation supplied to us at the time of the assessment. A full or further investigation of the product and / or
documentation may result in additional findings.
Report No: 071-75924520-601
70.0
60.0
T
e 50.0
m 40.0
p
30.0
T1
T2
° 20.0
C 10.0
T3
T4
08:10:00
08:50:00
09:30:00
10:10:00
10:50:00
11:30:00
12:10:00
12:50:00
13:30:00
14:10:00
14:50:00
15:30:00
16:10:00
16:50:00
17:30:00
18:10:00
18:50:00
19:30:00
0.0
Time
T1=Above USB socket
T2=Right of USB socket
T3= Left of USB socket
T4=Base under USB socket
The maximum recorded temperature was 58.6°C.
© 2013 Not to be reproduced except in full without the permission of TÜV SÜD Product Service
Page 5 of 6
The findings expressed in this report are our considered opinions and are based on our assessment of the samples and / or
documentation supplied to us at the time of the assessment. A full or further investigation of the product and / or
documentation may result in additional findings.
Report No: 071-75924520-601
Product Images
Internal Overview
Internal Face
Fusible Resistor
PCB
Markings
Transformer
© 2013 Not to be reproduced except in full without the permission of TÜV SÜD Product Service
Page 6 of 6
The findings expressed in this report are our considered opinions and are based on our assessment of the samples and / or
documentation supplied to us at the time of the assessment. A full or further investigation of the product and / or
documentation may result in additional findings.