Wolf ATEX 400VA Operation Instructions

Wolf ATEX 400VA/320VA and 250VA GRP
Transformer
Operation and Maintenance Instructions
Please Retain – Read Before Use
LL-114/T class /(Suffixes define cable, plug, socket and fuse options)
LL-214/T class /(Suffixes define cable, plug, socket and fuse options)
LL-221/T class /(Suffixes define cable, plug, socket and fuse options)
The Wolf ATEX GRP Transformer range are rated at 400VA/320VA and
250VA and use a durable GRP (glass reinforced polyester) enclosure housed
in a protective 316 stainless steel skid.
Check model identification label attached to the lid for the transformer's
power rating. The user must ensure this power rating is not exceeded.
400VA/320VA Transformer
The transformers listed below are certified with a maximum output of 400VA
in an ambient temperature of up to 35
o
of up to 50 C, and are Group II, Category 2 equipment for use in Zone 1 & 2
potentially explosive gases, vapours & mists, where temperature class T3 is
permitted, and zone 21 & 22 potentially explosive dusts where a maximum
o
surface temperature of 195 C is permitted.
Approval Codes/Certification:
Ex d e IIC T3 Gb
II 2 G D
o
Ex t IIIC T195 C Db
o
400VA - Tamb = -20 to +35 C
Model No Input Voltage
LL-114/T3/*** 110V AC +6%, -10%
LL-214/T3/*** 230V AC +6%, -10%
LL-221/T3/*** 230V AC +6%, -10%
LL-221/T3/***/CTE 230V AC+6%, -10%
Check model identification label attached to the lid for rated voltage.
250VA Transformer
The transformers listed below are certified with a maximum output of 250VA
in an ambient temperature of up to 55
equipment for use in Zone 1 & 2 potentially explosive gases, vapours & mists,
where temperature class T4 is permitted, and zone 21 & 22 potentially
explosive dusts where a maximum surface temperature of 130
Approval Codes/Certification:
II 2 G D Ex d e IIC T4 Gb
o
Ex t IIIC T130 C Db
o
Tamb = -20 to +55 C
Model No Input Voltage
LL-114/T4/*** 110V AC +6%, -10%
LL-214/T4/*** 230V AC +6%, -10%
LL-221/T4/*** 230V AC +6%, -10%
LL221/T4/***/CTE 230V AC+6%, -10%
Check model identification label attached to the lid for rated voltage.
ATEX Certificate: LCIE 02 ATEX 6248X.
Certificate 'X' suffix – Do not open when energised.
Declarations and Attestations of conformity are also enclosed.
The transformer is also IECEx approved as described above:
IECEx LCIE 04.0016X.
IMPORTANT INFORMATION
1. Read these instructions carefully before commencing to use the
Transformer and retain them for future use.
2. Check the approval label to ensure the Transformer is suitable for the
supply provided, ambient temperature present and the environmental
conditions.
3. Ensure the cable type is suitable for your application as certain cables
and their operational use / installation may alter the temperature range
of the product:
-SY cable has a lower operational temperature range of -5°C for flexed
applications. Note this cable's insulation is made from PVC.
-SB cable has a lower operational temperature range of -20°C for flexed
applications.
-H07RN-F cable has a lower operational temperature range of -25°C
flexed applications.
-Helkama cable has a lower operational temperature range of -35°C for
flexed applications.
4. It is the user's responsibility to ensure there is no potential difference
between the earth supply to the transformer and the earth where it is
sited. Where this is not possible the transformer should also be locally
earth bonded. A flexible cable with a conductor area of 6mm
which is no longer than two metres is recommended for this. The
transformer must be de-energised during connection or disconnection of
the local earth bond.
5. The Transformer housing is constructed from GRP (Glass Reinforced
Polyester) and the mounted sockets are plastic, the end user must
ensure that these materials are suitable for the atmosphere the
transformer will be used in. Excessive force should not be used on plastic
components.
LL-1280 issue 6
DF670
o C or 320VA in an ambient temperature
IP66
o
320VA - Tamb = -20 to +50 C
Output Voltage
24V AC
24V AC
110V AC.
110V AC CTE (55V-0V-55V)
o
C and are Group II, Category 2
o
C is permitted.
IP66
Output Voltage
24V AC
24V AC
110V AC.
110V AC CTE (55V-0V-55V)
2
minimum
6. The Transformer must not be opened when energised. After
disconnection from the mains supply a delay of 5 mins must be observed
before opening.
7. Ensure all replacement fuses are of the correct type and current rating.
Details of the fuses fitted are found on the transformer model
identification label attached to the lid.
8. Prices and design are subject to alteration without notice. All products
sold are subject to our conditions of sale. A copy of these instructions
with any relevant revisions can be found at –
9. When using the product, the plugs must be connected and fully engaged
in their corresponding socket to maintain the IP rating of the plug &
socket. Check the seals are present and in good condition in the socket
lid on any fitted sockets. The covers on the sockets must be fully closed
and latched to seal surfaces and maintain the stated IP rating of the
product.
Note - Plugs do not have latching covers or other devices to prevent
the ingress of fluid and/or dusts. They are only IP rated when engaged
in their corresponding sockets. Plugs must be kept clean and dry when
not engaged with a socket.
MAINTENANCE
1. Isolate the Transformer from the mains.
2. It is essential that the Transformer is maintained in accordance with the
requirements of EN60079-17
3. A visual check should be carried out to ensure all internal cable is in good
condition, and not suffering any sign of damage or degradation. All
internal connections should be checked to ensure that they are correctly
secured.
4. The transformer input and any connected equipment cables, glands and
plugs should be inspected before each use. Any damaged cables,
glands and plugs should be replaced immediately.
5. The condition of the GRP Enclosure, door gaskets and sockets should
be inspected for damage, and to ensure there is no breakdown in the
IP66 rating.
6. If changing the input or output fuses, care should be taken to secure the
screwed cover on fully.
7. IMPORTANT - No modifications are permitted to the Transformer.
USER GUIDANCE FOR WOLF ATEX TRANSFORMERS
1. It is a requirement of the certification that the transformer is only operated
in a vertical orientation, with the component transformer at the bottom.
This is indicated by the orientation warning label affixed to the
transformer door.
2. This Wolf ATEX Transformer is fitted with IEC 60269, 80kA breaking
capacity cartridge fuses and is designed to supply a maximum load of
400VA/320VA or 250VA dependent on the rating of these fuses. The
fuse types and maximum values must not be exceeded. The certification
is reliant on these fuses to prevent the T Class (in max ambient) being
exceeded under fault or overload conditions. Replacing these with fuses
of a different type or of a higher rating could result in an unsafe condition
occurring in the safe or hazardous area. To prevent nuisance tripping,
the total power of apparatus operated from the transformer should not
exceed the given maximum VA. Table 1 on page 2, contains suggested
combinations of Wolf lamps that can be connected. Where apparatus
other than Wolf lighting products are connected, its load should be
checked to ensure it is suitable for use with type gG (general) fuses.
Details of the fuses fitted are found on the transformer model
identification label attached to the lid.
3. In the event of a fault in a circuit connected to the transformer, it is
important that this fault current is interrupted by the output fuses before
overheating damage to circuits and a potentially unsafe condition in the
safe or hazardous area can occur. The user must therefore ensure that
the maximum total impedance of the potential fault current flow path,
from the source to the point of a fault, will not prevent this happening.
The connected circuit impedance is proportional to the length and
conductor area of the cable. Table 2 on page 2 contains Wolf's
recommended maximum cable lengths for given transformer output
voltage and fuse fitted. As can be seen from Table 2, reducing the fuse
value increases the permitted cable length. Transformers with part
numbers suffixed /2FXX are equipped with 2 off output fuses, and this
permits the use of longer cable lengths as the load is distributed across
two smaller value fuses. However, transformers with two output fuses,
due to the centre tap of the secondary being connected to earth (CTE),
will have shorter permitted cable lengths than non CTE versions of the
same output voltage.
Check model identification label on lid to establish whether the
output of the transformer is CTE connected.
4. Apparatus with long cable lengths (>20m @ 24V) must be checked to
ensure the calculated voltage drop will not prevent the apparatus from
operating within the specified voltage tolerance (see apparatus
instructions).
5. DIN rail mounted screw type terminal blocks are fitted to the transformer
to connect the input cable. Each terminal is suitable for a single
conductor up to 4mm 2 only. These terminals should be tightened down
to 0.6 Nm whether a conductor is fitted or not.
6. Approved cable glands must be used and be suitable for the type of
cable used. Any unused cable entries should be blanked off with an
approved stopper plug to maintain a minimum IP rating as marked on
the certification label. Gland and stoppers should be approved to
maintain the certification and IP rating as per the label.
Brass M20 Trumpet glands fitted by Wolf have the cable clamp
tightened to 1Nm. If contact between the two clamping faces is not
made then low strength threadlock is applied to prevent clamp fixing
from loosening. Black polymide M25 Trumpet glands have the cable
clamp tightened to 2.0Nm.
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