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Hot Appliance Couplers - Guaranteed operating safety and compatibility for "Hot" Appliance Couplers0 pages
Hot Appliance Couplers
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Hot Appliance Couplers
Guaranteed operating safety and compatibility for "Hot" Appliance
Couplers
Electric grills, heating devices, powerful projectors, data servers or lighting systems:
these are all appliances that generate a high degree of heat during operation. Such appliances place special demands on the power supply. Inherent risks such as overheating,
short circuits, burns or electric shocks must be reliably prevented for safe operation. Hot
appliance inlets according to the IEC 60320-1 component standard guarantee this safety,
as well as the compatibility of products from one manufacturer to the next.
damages to the equipment or surroundings.
An additional advantage of IEC 60320-1 is the
complete compatibility of products from a wide
range of manufacturers.
Use
SCHURTER's 1681 IEC appliance inlet
The IEC 60320-1 component standard is a
worldwide specification for appliance inlets
and connectors, covering various current
ranges, protection classes as well as
maximum pin temperatures and ambient
temperature for the connectors. Until the
introduction of this standard, appliance
couplers were covered under the DIN 49491
standard and were commonly called "waffle
iron plugs", since they were frequently used in
electric irons and waffle irons. A porcelain
insulator, with a steel tongue to establish the
safety contact, was installed in the appliance.
The coupler was surrounded by a Duroplast
(Bakelite) housing and was typically fabricated
using low quality cords with a fabric or rubber
sheath. This type of hot appliance inlet design
concealed serious safety risks:
High temperature appliance inlets are used
universally for the operation of appliances with
high heat generation, for example, electric
grills, table grills, raclette makers or electric
heaters. Hot appliance inlets are also
frequently used in other applications such as:
IT equipment (e.g., high-powered computers,
data servers), powerful projectors, lighting
systems, medical devices, measurement
instruments, power supplies or other industrial
types of equipment.
Criteria
From the user's perspective, power supply
safety is crucial. The IEC 60320 set of
standards establish basic criteria for protection
class, rated current, pin temperature, and
provide specific measurements for the
different coupler shapes. Based on the
maximum permitted pin temperature, the IEC
60320-1 component standard distinguishes
three main categories:
-t
-t
-t
Appliance couplers for cold conditions
maximum pin temperature 70°C
Appliance couplers for warm conditions
maximum pin temperature 120°C
Appliance couplers for hot conditions
maximum pin temperature 155°C
These three temperature categories (cold,
warm and hot appliances) are established only
for the 10 A inlet styles. The remaining styles
have only one or two temperature categories
(see Table 1).
Mating Appliance Coupler IEC60320-1
Appliance Inlets
Gender Male
Symbol
Symbol Type
Current [A]
Type
Current [A]
Temperature [°C]
Temperature [°C] Protection classe
C6
2.5
70
1
C8
2.5
70
2
C8p
2.5
70
2
C10
6
70
2
C14
10
70
1
C16
10
120
1
C16A
10
155
1
C18
10
70
2
C20
16
70
1
With products manufactured according to the
IEC 60320-1 standard, these risks can be
eliminated, for the most part, with proper use:
meaning users and appliances are properly
protected, as is any related consequential
1
2.5
70
2
C7p
2.5
70
2
C9
6
70
2
C13
10
70
1
C15
10
120
1
C15A
10
155
1
C17
10
70
2
16
70
1
16
155
1
•
C23
16
70
2
C24
16
70
2
•
•
•
C21
Gendre Female
70
C7
IEC60320
Connectors
2.5
C19
-- Short circuits inside the socket, due to a t
t lack of heat resistant insulation on the cord
-- Charring, caused by overheating of the plug t
tcomponents
-- Electric shocks, due to insufficiently tt
t recessed conductive contacts on the plug
C5
C22
16
155
1
•
•
•
•
•
•
•
•
•
Table 1: Coupler categories (source: SCHURTER AG)
Connectors
1
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