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MIL-DTL-22992 QPL Qualified Heavy Duty Cylindrical Connectors
"Class L"

The UEC MIL-DTL-22992 QPL'd Class L heavy duty connectors are the largest size cylindricals, highly suitable for industrial or military applications, and designed to meet the demands of heavy power interconnections.

The design features of this connector series provide:

Greatest Capacity
current ranges 40 to 200 amps,
conductor sizes 6 to 4/0

Safety
complete protection of personnel
and equipment if connectors are
inadvertently disconnected under
load

Foolproof Mating
design incorporates specific voltage, current, frequency, phase and
grounding requirements

Standardization
MIL-DTL-22992 Class L insert
arrangements specify connector/
cable combinations for maximum
reliability

Serviceable Contacts
contacts are normally crimped to the cable before connector assembly. No insertion tools required. Bushings are available to adapt smaller diameter wires to larger contacts

Arc quenching design
recessed socket contacts within the insert create an arc suppressing chamber which protects the user when connectors are separated under load.

Programmed coupling sequence
grounding and neutral contacts engage before power contacts.

Class L connectors are available only in the specific configurations prescribed by MIL-DTL-22992 for either military or industrial applications. This rigid configuration control assures correct interconnection of electrical circuits for maximum safety and reliability. Controlled parameters include:

How to order

Connectors are supplied with removable contacts unassembled and applicable accessories.
Additional/replacement contacts or accessories may be ordered by their corresponding part numbers.

1 Part Number
MS90555 designates wall mount receptacle (power source)
MS90556 designates straight plug
MS90557 designates cable connecting receptacle without coupling ring
MS90558 designates wall mount plug with coupling ring (equipment end)

2 Shell Finish
C (conductive) for AC or N (nonconductive) for DC circuits.

Ground Assemblies: Finish C

3 Shell Size – related directly to current carrying capability.
Size 28 - 40 amperes
Size 32 - 60 amperes
Size 44 - 100 amperes
Size 52 - 200 amperes

4 Master Key/Keyway Position – N designates normal position. Positions 1, 4, 5 and 6 of the master key/keyway prevent cross-mating of incompatible volt-ages. Refer to the adjacent illustration.

5 Insert Arrangement – determined by connector size (current carrying capability) and cable configuration to be accommodated.

6 Contact Type – P for pin, S for socket. MS90555 and MS90557 are
supplied with socket contacts only. MS90556 and MS90558 are supplied with pin contacts only.

7 Alternate Insert Rotation – used to prevent cross-mating of incompatible frequencies. Absence of a letter in this space indicates normal (0°) position of the insert.

As shown in the adjacent illustration, the front face of the pin insert is rotated within the shell in a clockwise direction from the normal shell key. The socket insert would be rotated counterclockwise the same number of degrees in respect to the normal shell key.

To avoid cross-plugging problems in applications requiring the use of more than one connector of the same size and arrangement, alternate insert rotations are available as indicated in the accompanying chart.

UEC heavy duty Class L connectors have been exposed to the most rigorous recently updated military environmental conditions, without compromise of mechanical integrity or degradation of electrical performance. Parameters include:

MIL-DTL-22992 QPL Qualified Heavy Duty Cylindrical Connectors
"Class QWLD"

The UEC MIL-DTL-22992 QPL'd Class QWLD heavy duty cylindrical connectors provide reliable power and control functions in hostile environments where ordinary connectors cannot survive.

The design features of this connector series provide:

High Durability
Water and explosion proof, resistant to abrasion, corrosion, vibration and shock

Quick, Positive Mating
Double stub threads per MIL-STD-1373 for fast coupling, easily cleaned

Selection
Over 300 industrial and MS-approved insert patterns available, including coaxial and thermocouple Outstanding design features that make these cylindricals a necessity for difficult applications include:

• Alumilite 225* hard anodic finish for abrasion and corrosion resistance or conductive cadmium plate
• Resilient inserts for moisture sealing, positive proof against shock and vibration
• Sealing gaskets at every joint for water-proof assembly
• Cable strain relief provided by clamp bar type accessories

MS-APPROVED CONNECTORS
To illustrate the ordering procedure, part number
MS17343R20N27PW is shown as follows:

 PART NUMBER

1: MS Number
MS17343 designates wall mount receptacle
MS17344 designates straight plug MS17345 designates cable connecting plug MS17346 designates box mount receptacle MS17347 designates jam nut receptacle with rear accessory threads (wall mount)
MS17348 designates jam nut receptacle (box mount)

2: Class
C designates pressurized - used where circuit integrity is protected by a pressure differential. R designates environmental.

3: Shell Size
Available in shell sizes 12 through 44.

4: Shell Finish
C for conductive or N for non-conductive.

5: Insert Arrangement
Please contact us for all current MS insert arrangements.

6: Contact Type
P for pin, S for socket.

7: Alternate Insert Rotation
Used to prevent cross-mating of connectors. Absence of a letter in this space indicates normal (0°) position of the insert.

 MIL-DTL-22992 environmental and mechanical

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