NOTICE:
In order to maintain the IP protection
provided by DB models in custom installations,
watertight seals should be used under the heads of
the four mounting bolts and they must be retained
by a lock washer and nut on the inside of the box or
panel. Alternatively, four blind holes may be drilled
and threaded to accommodate the mounting screws,
provided that the hole depth is sufficient to achieve
adequate gasket compression.
OPERATION
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To ensure safe and reliable operation,
MELTRIC plugs and receptacles must be used
in accordance with their assigned ratings.
MELTRIC plugs and receptacles can only be used in
conjunction with mating receptacles or plugs manu-
factured by MELTRIC or another licensed producer of
products bearing the
technology trademark.
MELTRIC plugs & receptacles are designed with
different keying arrangements, so that only plugs and
receptacles with compatible contact configurations
and electrical ratings will mate with each other.
Connection
First remove the lid on the receptacle by turning the
locking ring fully counterclockwise. The lid can then
be removed. For convenience it remains attached to
the receptacle by a wire.
To insert the plug into a receptacle, the arrow on the
plug casing is aligned with the left end of the viewing
window on the receptacle, Figure 1 . Push the plug
partially into the receptacle until it hits a stop then
rotate slightly clockwise. The plug is now in the rest
position with circuit open.
Push the plug straight into the receptacle until it is
held in place by the locking ring Figure 2 . The
electrical connection is now made as indicated by the
red color in the viewing window. IP67 watertightness
is achieved by fully rotating the locking ring in the
clockwise direction until the protruding lockout tab
completely clears the window shroud.
Disconnection
To break the connection, turn the locking ring fully
counterclockwise. This will break the circuit and
eject the plug straight out to the rest or off position.
The plug contacts are deenergized at this point. To
remove the plug, rotate it counterclockwise (about
10°) until it can be withdrawn from the receptacle,
Figure 3 . Insert the lid and rotate the locking ring
fully clockwise to provide IP67 protection to the
receptacle, Figure 4 .
To attempt another engage-
ment after disconnection, the plug must be
returned to its rest position.
Achieving Ratings & Watertightness
Rated ingress protection is achieved when the
plug and receptacle are mated and the locking
ring is fully rotated in the clockwise direction. It can
also be achieved by the receptacle when the lid is
inserted and the locking ring is fully rotated in the
clockwise direction.
NOTICE:
Proper steps must be taken to maintain
watertightness at NPT fittings on the plug handles
or at the junction box. Use of a sealer tape is
recommended.
Lockout Provisions
All DB plugs and receptacles are provided with
lockout provisions.
Plug Lockout
To prevent the DB plug from being inserted into any
DB receptacle place a padlock or a safety lockout
through the hole provided.
Receptacle Lockout
Insert the lid and fully rotate the locking ring clock-
wise. A padlock or safety lockout can then be inserted
in the hole on the locking ring.
Locking Plug and Receptacle in Closed Position
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Deenergize electrical power to the receptacle
prior to punching out the knockout hole on the
receptacle locking ring.
To lock the plug and receptacle in the closed position
a knock-out hole located on the receptacle locking
ring must first be opened with the help of a 1/4”
punch. When the plug and receptacle are engaged
and the locking ring is fully rotated then the lockout
hole will have cleared the window shroud and a
padlock or safety lockout can be inserted.
Locking Plug and Receptacle in the Open or
Parked Position
When the plug is in the rest or off position the lockout
holes on the locking ring and plug can be aligned.
Insert a safety lockout device through both holes to
lock the unit in the parked position.
MAINTENANCE
Before inspecting, repairing,
or maintaining MELTRIC prod-
ucts, disconnect electrical power to the receptacle to
eliminate the risk of electrical shock.
MELTRIC products require little on-going mainte-
nance. However, it is a good practice to periodically
perform the following general inspections:
• Check the mounting screws for tightness.
• Verify that the weight of the cable is supported
by the strain relief mechanism and not by the
terminal connections.
• Check the IP gaskets for wear and resiliency.
Replace as required.
• Verify the electrical continuity of the ground circuit.
• Check the contact surfaces for cleanliness
and pitting.
Use a clean cloth to rub off deposits of dust or sim-
ilar foreign materials on the contacts and the plug
interiors. Sprays should not be used, as they tend to
collect dirt. If any significant pitting of the contacts
or other serious damage is observed, the device
should be replaced.
MANUFACTURER’S RESPONSIBILITY
MELTRIC’s responsibility is strictly limited to the
repair or replacement of any product that does not
conform to the warranty specified in the purchase
contract. MELTRIC shall not be liable for any pen-
alties or consequential damages associated with the
loss of production, work, profit or any financial loss
incurred by the customer.
MELTRIC Corporation shall not be held liable when
its products are used in conjunction with products
not bearing the
technology trademark. The
use of MELTRIC products in conjunction with mating
devices that are not marked with the
tech-
nology trademark shall void all warranties on the product.
MELTRIC Corporation is an ISO 9001 certified
company. Its products are designed, manufactured
and rated in accordance with applicable UL, CSA and
IEC standards. MELTRIC designs and manufactures
its products in accordance with Marechal keying
standards established to ensure intermatablility with
similarly rated products manufactured by Marechal
Electric Group.
1
3
4
5
6
2
1
2
3
4
1
3
4
5
6
2
1
2
3
4
Table 6 - Custom Mounting Dimensions
‘A’
‘B’
Model
Inches mm Inches mm
DB30
2.17 55
2.17 55
DB60
2.68 68
2.59 66
DB100
3.35 85
3.2 81
Lockout
Holes
Locking
Ring
Lockout
Hole
INSDB J
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