1.7 Area of use
NGC-20-C(L)-E controllers are used for temperature control and temperature limiting of electrical heaters in industrial and potentially
explosive atmospheres. The NGC-20-CL-E consists of a temperature controller and an additional safety temperature limiter.
NGC-20-C(L)-E units are approved for use in hazardous area Zone 1 and Zone 2 (Gas) and Zone 21 and Zone 22 (Dust). Where needed
the temperature sensor of the unit can be placed in Zone 0 (Zone 20) However, the control unit itself is not approved for being installed
in Zone 0 (Zone 20).
1.8 Safety instructions
During operation, do not leave this Instruction Manual or other objects inside the enclosure. Use the temperature controller and limiter
only for its intended purpose and operate it only in clean, undamaged condition. In the event of incorrect assembly, the requirements of
IP66 as specified by IEC 60529:2001 are no longer met. Do not make any modifications to the temperature controller and limiter that are
not expressly mentioned in this Instruction Manual.
Whenever work is done on the temperature controller and limiter, be sure to observe the national safety and accident prevention
regulations and the safety instructions given in this Instruction Manual.
1.9 Conformity with standards
NGC-20-C(L)-E units meet the requirements of the following Hazardous area- and functional safety standards and are developed,
manufactured and tested in accordance with state-of-the-art engineering practice.
IEC 60079-0, EN60079-0
General requirements
IEC 60079-7, EN60079-7
Increased safety
Ex e
IEC 60079-18, EN60079-18
Encapsulation
Ex m
IEC 60079-11 EN60079-11
Intrinsic safety
Ex i
IEC 61241, EN 61241 Parts 1 to 3
Electrical apparatus for use in the presence of combustible dust
IEC 61508-1:2000 and IEC 61508-2:2000
For NGC-20-CL-E only: Functional Safety of Electrical /Electronic /
Programmable Electronic Safety-related Systems
Table 1: Standards overview.
1.10 Technical data
Application type
NGC-20-Cx-E units are approved for use in Hazardous area Zone 1 or Zone 2 (Gas) or Zone
21 or Zone 22 (Dust) and non hazardous areas
Hazardous area Approval
Baseefa08ATEX0184X
II 2 GD Gb Ex e mb ib IIC T* Db Ex tD A21 IP66 T95°C
IECEx BAS 08.0047X
Gb Ex e mb ib IIC T*
Db Ex tD A21 IP66 T95°C
T*: The switching capacity depends on the hazardous area temperature classification
(T-Class) and the maximum expected use temperature. Ratings as shown in table below
Temperature Class T5
Temperature Class T4
Maximum Ambient
Temperature
Maximum Switching
Current
Maximum Ambient
Temperature
Maximum
Switching Current
+ 50 °C
25 A
Up to 56 °C
25 A
+ 54 °C
20 A
+ 56 °C
16 A
All values as per hazardous area certification.
Current ratings are given for a supply voltage of 254V +/-10%, 50/60 Hz and resistive loads only.
TC RU С-ВЕ.ИМ43.В.01764
1Ex e ib mb IIC T5/T4 Gb X
Ex tb IIIC T100°C/T130°C Db X IP66
Ta -60°C... +60°C
ООО "ТехИмпорт
N°: 10-IEx-0020X
Ex e ib mb IIC T* Gb
Ex tb IIC T* °C Db IP66
6 | nVent.com
