INSTALLATION & OPERATING DATA
A T E X
M 2 / M 1
GROUP I
INTRINSICALLY
SAFE
6 PRECAUTIONS
•
Ensure that all covers on Exd housings and their fixing devices are properly secured in compliance with
statutory Exd regulations before switching on the input supply.
•
Never remove the cover of an Exd housing whilst the input supply is connected. Isolate elsewhere
before removing the cover in accordance with statutory regulations.
•
The housing of all power supplies must be securely earthed in compliance with statutory regulations.
•
Carry out a current consumption audit to ensure that the maximum current loading of the power
supply is not exceeded.
•
Ensure that the installation of the power supply, particularly with regard to the
connecting cables, complies with the certification parameters (section 7).
•
Exd housings must be inspected and maintained regularly in accordance with statutory regulations.
•
Use only the correct Trolex replacement fuses (section 7).
Do not substitute any form of equivalent or linking device.
•
The TX6630 Series Exi Power Supply must be mounted in an approved Exd housing when located in a
hazardous area.
•
All cables entering the Exd housing must be terminated with suitable Exd certified cable glands.
•
The cabling between the Power Supply and other approved intrinsically safe devices must comply with
the cable parameters specified in the appropriate Ex certification of the device.
•
Never connect two power supplies in parallel, or employ external circuitry that results in two Intrinsically
Safe Power Supplies circulating in one system. This will contravene the limits of Intrinsic Safety.
•
Where an Intrinsically Safe Power Supply is fitted with auxiliary
Intrinsically Safe isolating relays, all the relay coils are powered
from a common Intrinsically Safe source.
•
If an ac input fuse is ruptured at any time, it can be replaced. It is recommended however, that a full
investigation is carried out to try to establish the cause of the failure as this could indicate potentially
dangerous external conditions.
•
It is good practice to check the condition of the mating flame path surfaces on the Exd chamber
cover whenever it is removed.
•
Five x M25 threaded cable entries are provided on the underside of the Exd chamber for connecting
the incoming Power Supply and for connections to relay contacts if these are fitted.
Approved Cable Glands:
Hawke: 650 series Compound Filled M25 Thread
Hawke: 650 series Compound Filled M20 Thread (when used with a M25/M20 reducer).
Approved Thread Reducers:
Hawke: 476/R, M25/M20 Thread
•
All unused cable entries MUST be blanked off with an APPROVED STOPPING PLUG.
Approved Stopping Plugs:
Hawke: 475, M25 Thread
•
The requirements of the Exd certification of the TX6620 Series Intrinsically Safe Power Supply demand that
electrical
isolation must be provided in the mains Power Supply feed. The isolation should be mounted
adjacent to the Power Supply.
•
The metal housing of the Power Supply, should be earthed in compliance with local regulations.
•
Ensure that the mating faces of the Exd chamber cover are clean and free from inclusions before the
cover is replaced. It is permissible to use copper grease on the mating faces to protect against
corrosion and moisture ingress.
Refer to Section
7
Refer to Section
7
I.S.
Source
RL1
RL2
RL3
RL4
T
T
X
X
9
9
1
1
3
3
0
0
s
s
e
e
r
r
i
i
e
e
s
s
ISSUE D 06/14
7/12
