Meltric SP User manual

GENERAL
SP devices are single-pole, high-amperage plugs and
receptacles that are designed for safety, durability,
and ease of operation. Each device is mechanically
interlocked with an integral pilot circuit switch for
controlling the power circuit in order to prevent
connection and disconnection under load. Each of
the phases as well as the neutral and ground, are
color coded and keyed to prevent improper connection.
SP receptacles are IP 2X rated to prevent accidental
finger contact with live parts.
There are inherent dangers
associated with electrical
products. Failure to follow
safety precautions can result in serious injury or death.
These instructions must be followed to ensure the safe
and proper installation, operation and maintenance of
the MELTRIC devices. Before installation, disconnect
all sources of power to the circuit to eliminate the risk
of electrical shock. This product must be installed with
an electrical interlock that prevents connection or
disconnection in a loaded condition.
RATINGS
The SP series is CSA listed for use in Non-Load Break
applications up to 600A at 600VAC, 500 HP 3 phase
at 480 VAC and 600 VAC. The SP devices are
NOT designed or listed for current interruption. The
SP receptacle is provided with two auxiliary/pilot
contacts that make (close) when the locking collar
is rotated after plug insertion. The pilot contacts are
designed for use in control circuit wiring of medium
current switchgear, (see diagram of pilot circuit wiring).
The SP pilots have a D300 rating as shown in Table 1.
The phase contact is rated to withstand a 30 kA short
circuit with a current limiting fuse rating as shown in
Table 2. Consult MELTRIC Engineering for horsepow-
er ratings and limitations at lower voltages.
INSTALLATION
SP devices should be installed by qualified
electricians in accordance with all applicable
local and national electrical codes.
Before installing, verify the power is off and the prod-
uct ratings are appropriate for the application. Ensure
the conductors meet code requirements and are with-
in the wiring terminal capacities noted in Table 3.
NOTICE: Ensure the plug and its flexible cable do
not exert a significant force or a constraint on the
receptacle.
Wiring of the pilot contacts
The SP auxiliary/pilot contact leads of each device
should be wired in series within the power control
circuit. A typical pilot circuit wiring diagram is
shown below.
Wiring of the main conductor
Use a flexible cable between 2/0 and 777 MCM (70
and 400 mm2). Strip the insulation as appropriate for
the lug being used. Solder lugs have integral threads
that screw into the terminals. The solder lug should
be tightened until the tapered section is secured in
solid contact with the terminal. Crimped lugs are
secured with M12 bolts that should be tightened to
approximately 30 ft-lb (40 N.m.) with a 3/4" (19 mm)
wrench.
NOTICE: To avoid transmitting torque to the device
moldings when securing the lugs, hold the terminal in
place with a 24 mm wrench (flats are provided).
Hole Pattern for Custom Mounting
NOTICE: In order to maintain IP66/67 protection in
custom installations, watertight seals must 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 can be drilled and threaded to accommodate
#8-32 x 5/8" mounting screws. The hole depth must
be sufficient to achieve adequate gasket compression.
Attaching the handle
Insert cable through cable gland and handle before
tightening the phase conductor. Assemble handle
with the screws and gasket supplied, (use short
screws for inlets, long screws for receptacles) and
tighten cable gland with an appropriate tool.
NOTICE: MELTRIC solder lugs are required for use
with handles.
Attaching the metal angle (if required)
Attach receptacle or inlet to metal angle using the
screws and gasket supplied, (use short screws for
inlets, long screws for receptacles). Connect the
metal angle to ground.
Assembly of the plug/inlet cap
Attach the cap to the plug/inlet by retaining the end
of the chain under one of the mounting screws.
Gasket
In order to achieve rated watertightness, the flat
black gasket must be installed between the inlet or
receptacle and the panel or accessory to which it
is attached.
Rated current and voltage markings
It is essential to indicate the current and voltage of
the main circuit on the supplied stickers. Apply the
stickers on or adjacent to the product so they can
easily be seen.
OPERATION
To ensure safe and reliable operation,
MELTRIC plugs and receptacles must be used
in accordance with their assigned ratings.
SP devices can only be used in conjunction with
mating receptacles or plugs manufactured by
MELTRIC or another licensed producer of products
bearing the ™technology trademark.
L1 L2 L3 N
L1 L2 L3 N
P1 P2
L1 L2 L3 N
L1 L2 L3 N
P1 P2
2"1.67"
1.67"
Ø.201 thru or
tap for 10-32
Table 1 - Auxiliary Contact Ratings
Device 120VAC 240VAC 480VAC 600VAC
SP .6A .3A – –
Table 2 - Short Circuit Withstand Ratings
Device Rating Fuse Type1
SP – 600A 30 kA @ 600 VAC Class L 1400A2
1 - Short Circuit Rating applies with fusing up to this amperage.
Ratings are based on tests performed with Ferraz Shawmut non-
time Delay Current Limiting fuses.
2 - Tests performed with maximum allowable motor fusing sized per
the 2008 NEC.
Max Min
SP 777 MCM 2/0 12-14 AWG
Table 3 - Wiring Terminal Capacity
Main Contacts Aux. Contacts
SP
OPERATING INSTRUCTIONS
A company of MARECHAL ELECTRIC GROUP
MELTRIC Corporation / 4765 W. Oakwood Park Drive Franklin, WI 53132
Tel. : [phone] / Fax : [phone] / e-mail : [email protected]
INSSP F
A manufacturer of products using Marechal technology
meltric.com

NOTICE: Do not attempt to operate the SP device
until the receptacle is mounted. The mounting bolts
must be in place to maintain alignment of compo-
nents and compression against the panel or handle is
required to maintain assembly.
SP series plugs and receptacles feature different
mechanical keying of L1, L2, L3, N, and G. Mating
plug/receptacle combinations are color coded for
easy identification.
SP series plugs and receptacles are not intended
to be connected or disconnected under load.
The pilot circuit must be used to control the
power circuit.
The pilot circuit can only be turned ‘on’ when the
plug is engaged and the plug can only be removed
when the pilot curcuit is in the ‘off’ position. For
safety, MELTRIC recommends the following connec-
tion sequence: Ground, Neutral, Phase 1, Phase 2,
Phase 3.
Connection
Insert the plug straight into the receptacle until a
‘click’ is heard. Figure 1 The plug and its flexible
cable must not exert force on the receptacle.
Pull on the plug to make sure it is properly latched
in the receptacle. Figure 2 A small rotation of the
plug, in either direction, engages the locking finger on
the receptacle to prevent any further rotation.
To close the pilot circuit and mechanically lock the
plug into the receptacle, turn the ring on the recep-
tacle until the “1” lines up with the arrow across from
the release button. Figure 3
Do not attempt to turn the ring towards “1”
when there is no plug engaged. Defeating the
mechanical lock could create a potentially
hazardous condition if energized under load.
Disconnection
To open the pilot circuit and unlock the plug, turn the
ring back until the “0” is aligned with the arrow.
Figure 4 This action signals the controller to switch
off the power and unlocks the plug. To remove the
plug, press firmly on the latch release button and
simultaneously pull on the plug. A slight rotation of
the plug may be required before it can be removed.
Achieving rated watertightness
Rated IP66/67 watertightness to is achieved when
the plug and receptacle are mated. When discon-
nected, the receptacle cap must be fully inserted with
the slot in the cap aligned with the protruding ‘button’.
The plug cap must be pressed firmly into place.
NOTICE: Proper steps must be taken to maintain
watertightness at threaded connections on the plug
handles or at the junction box. The use of a sealer
tape is recommended.
MAINTENANCE
WARNING: Before inspecting, repairing, or maintain-
ing MELTRIC products, 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 similar
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 penalties or
consequential damages associated with the loss of
production, work, profit, or any other kind of 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 devic-
es that are not marked with the ™technology
trademark shall void all warranties on the product.
MELTRIC Corporation is an ISO 9001 certified com-
pany. 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.
4
3
1
2
Latch
Release
Button
INSSP F