Meltric DSDC - Manual (Page 2)

The DSDC series offers a NEMA 3R or IP54/IP55
protection standard. NOTICE: An option for Type 4X
or IP 66 & 67 protection is available 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 accomodate the mounting
screws, provided that the hole depth is sufficient to
achieve adequate gasket compression.
OPERATION
To ensure safe and reliable operation Meltric
plugs and receptacles must be used in
accordance with their assigned ratings.
They can only be used in conjunction with mating
receptacles or plugs manufactured by Meltric or
another licensed producer of products bearing the
TM 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.
Factory jumpers are installed on devices
intended for applications of 600VDC and
750VDC. The figure below shows the location of
these jumpers, DO NOT REMOVE them.
Dual Circuit DC Wiring Instruction for
Non-Load Break Applications
Some applications require connections with 2
separate DC circuits. This requires 4 contacts
(or 5 if a ground contact is used). In these cases:
• L3 and L2 are used for the (+) and (-) of the up to
250 VDC circuit with the highest voltage.
• L1 and N are used for the (+) and (-) of the up to
250 VDC circuit with the lowest (or equal) voltage.
Connection
Verify the power source is de-energized.
DO NOT ENGAGE ON AN ENERGIZED CIRCUIT.
To connect a plug and receptacle, first depress the
pawl to open the lid on the receptacle, then orient the
plug as shown in figure 1 so that the red dot on the
outside of the casing lines up with the red dot just to
the left of the latch on the receptacle casing. Push
the plug partially into the receptacle until it hits a
stop, then rotate the plug in the clockwise direction
until it hits another stop after about 30° of rotation.
At this point, the circuit is still open. Push the plug
straight into the receptacle as shown in figure 2 until
it becomes securely latched in place. The electrical
connection is now made. On in-line connectors,
squeeze the drawplates on both sides of the device
together until the plug latches in place.
As an added safety feature, the DSDC2 is provided
with a “locking pawl” to prevent any unintended
connections. To mate the devices, loosen the thumb
screw on the pawl, and follow steps 1 and 2. On the
DSDC9 and DSDC2 devices, an integral mechanism
provides easy connection of the plug to the receptacle.
With the DSDC9 or DSDC2 plug partially inserted
and rotated 30° so that it is positioned for connection,
place the wire clamps around the bolt heads as
shown in figure 3.
To pull the plug into the receptacle, simply push
the handles back along the side of the receptacle
and then push the plug into the receptacle until the
plug is latched in place, as shown in figure 4. On
the DSDC2, tighten the thumb screw on the pawl to
prevent any unintended disconnection. A locking
device should be used when the devices are mated.
Disconnection
Before disconnection, verify the power source
is de-energized. DO NOT DISENGAGE ON
AN ENERGIZED CIRCUIT.
To release the connection after the power source
has been turned off, simply depress the pawl as
shown in figure 5 . This will eject the plug straight
out to the rest, or off, position. To remove the plug,
rotate it counter-clockwise (about 30°) until it releases
from the receptacle as shown in figure 6 . Close
and latch the lid on the receptacle. As an added
safety feature, DSDC2 is proved with a “locking
pawl” to prevent any unintended disconnections. To
disconnect the devices, loosen the thumb screw
on the pawl, and follow steps 5 and 6.
Achieving Environmental Ratings
and Watertightness
For devices rated Type 4, 4X or 3R, use only
with mating devices having identical markings
to maintain enclosure rating of the mated pair.
Rated ingress protection applies to the device when
the plug and receptacle are mated and latched
together. It also applies to the receptacle when the
lid is latched closed.
Lockout Provisions
All DSDC devices are provided with lockout
provisions, which are designed for a 5/16” lock
shank. These may be used to “lock” the devices
together to prevent unintended disconnection, or
to lock out the receptacle or inlet. To prevent an
unintended disconnection, lock the devices together
by inserting a locking device through the hole
provided in the pawl after the plug and receptacle
have been connected.
To lockout the plug, insert a locking device through
the hole provided in the casing. This will prevent the
plug from being inserted into a receptacle.
To lockout the receptacle, close and latch the lid
and then insert the locking device through the hole
provided in the pawl. This will prevent the lid from
being opened for the insertion of a plug.
MAINTENANCE
Before inspecting, repairing, or
maintaining Meltric products,
disconnect electrical power to the receptacle to
eliminate the risk of electrical shock.
Meltric products require little on-going maintenance.
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.
Deposits of dust or similar foreign materials can be
rubbed off the contacts with a clean cloth. 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.
Receptacle contacts may be inspected by a qualified
electrician. This should only be done with the power
off. It is accomplished by depressing the numbered
ring around the circumference of the interior on two
opposite points. This will allow the shutter to be
manually turned clockwise as required to permit access
to the contacts. Once the inspection is complete, the
shutter must be rotated counter-clockwise until it is
locked in the closed position.
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 penalties
or conse-quential 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 TM technology trademark. The
use of Meltric products in conjunction with mating
devices that are not marked with the TM
technology trademark shall void all warranties on 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 is also a member of BECMA,
the international Butt-contact Electrical Connectors
Manufacturers’ Association. Like all members,
Meltric additionally designs and manufactures its
products in accordance with BECMA standards
established to ensure intermatablility with similarly
rated products manufactured by other members.
www.becma.ch INSDSDC D
3
4
Wire clamp
around bolthead
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