RADEX
®
-N
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
47110 EN
28 of 31
24
Please observe protection
note ISO 16016.
Drawn:
2019-07-23 Pz/Wb
Replacing:
KTR-N dated 2018-07-17
Verified:
2019-07-26 Pz
Replaced by:
Types available:
NN, NANA 1 to 4, NENA 1 and 2, NENE 1, NNZ, NNW and MK each with flange hubs and each with lamina sets
type with 8 pins and closed circular lamina as well as assembly with KTR clamping nuts.
Conditions of operation in
potentially explosive atmospheres
RADEX
®
-N
couplings are suitable for the use according to EU directive 2014/34/EU.
1. Industry (with the exception of mining)
•
Equipment group II of category 2 and 3 (
coupling is not approved/not suitable for equipment group 1
)
•
Substance group G (
gases, fogs, vapours
), zone 1 and 2 (
coupling is not approved/not suitable for zone 0
)
•
Substance group D (
dusts
), zone 21 and 22 (
coupling is not approved/not suitable for zone 20
)
•
Explosion group IIC (gases, fogs, vapours)
(explosion group IIA and IIB are included in IIC)
and explosion
group IIIC (dusts)
(explosion group IIIA and IIIB are included in IIIC)
Temperature class:
Temperature class
Ambient or operating temperature T
a
1)
Max. surface temperature
2)
T2
-40 °C to +230 °C
+250 °C
T3
-40 °C to +175 °C
+195 °C
T4
-40 °C to +110 °C
+130 °C
T5
-40 °C to +75 °C
+95 °C
T6
-40 °C to +60 °C
+80 °C
Explanation:
The maximum surface temperatures each result from the maximum permissible ambient or operating temperature T
a
plus the maximum
temperature increase
T of 20 K to be considered. For the temperature classes T6 to T3 (≤ 200 °C) a safety margin subject to standard of 5 K
and from temperature class T3 (≥ 200 °C) a safety margin subject to standard of 10 K is added.
1) The ambient or operating temperature T
a
is limited to +250 °C due to the permissible permanent operating temperature (surface
temperature).
2) The maximum surface temperature of +230 °C applies for the use in locations which are potentially subject to dust explosion.
In potentially explosive atmospheres
•
the ignition temperature of dusts generated must at least be 1.5 times the surface temperature to be
considered
•
the glow temperature must at least be the surface temperature to be considered plus a safety distance of 75 K.
•
the gases and vapours generated must amount to the temperature class specified.
2. Mining
Equipment group I of category M2 (
coupling is
not approved/
not suitable for equipment group M1
)
Permissible ambient temperature -40 °C to +130 °C.
10
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
10.1 Intended use in
potentially explosive atmospheres
