Robert Technology Power & Signal connectors, PDP's, Generators, Cable Assemblies

MIL-DTL-22992 QPL Qualified Cylindrical Connectors "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 RTI Class “L” connector line is a power connector with current ratings ranging from 40 through 200 amperes. This type of connector is required for all ground power equipment by MIL-STD-454, and are considered the preferred connector under MIL-STD-1453, which mandates its use in all equipment procured by the military. The selection of Class “L” connectors was primarily based on maximum user safety and equipment protection.

RT90556-MS90556

SIZE	PART NO.	A THREAD	E	G	H	L	N	Q	GG
28	RT90556*28	2.000	Table 2	1.8750-16UN	1.750	2.000	8.188	2.312	2.439/2.428
32	RT90556*32	2.250	Table 2	1.8750-16UN	1.750	2.250	8.188	3.562	2.689/2.678
44	RT90556*44	3.000	Table 2	2.3125-16UN	2.250	3.125	2.500	3.531	3.667/3.646
52	RT90556*52	3.500	Table 2	3.0000-16UN	2.875	3.625	3.250	4.016	4.167/4.146

Safety

RTI Class “L” connectors are equipped with arc quenching chambers to minimize damage to cable or connector and reduce the hazard of live circuit rupture to personnel during the most severe field conditions.
Designed with a coupling sequence that engages both the neutral and ground contacts before the power contacts.
Socket contacts are recessed well within the dielectric face, which represents a “dead face” to the outside world.

Equipment Protection

Connectors are shell polarized (key/keyway) for alternate voltage and phase requirements.
Discrimination of 60 Hz & 400 Hz accomplished by alternate nsert positions.
Current rating controlled by shell size.
Connectors are fully grounded for all AC applications.

Additional Design Features

Shells are machined from high strength aluminum and are supplied with conductive or non-conductive finishes.
Equipped with necessary seals for waterproofing whether mated, unmatted, capped or uncapped.
Crimped or soldered contacts, hand insertable and removable.
Quick connect/disconnect for mating and unmating during severe field conditions.

Ordering Information

Connectors are supplied with removable contacts. Contacts are supplied unassembled. Also supplied are applicable accessories as shown below. Additional contacts may be ordered separately by part number. Connectors may be be ordered by RTI part number or we can cross reference the military(MS) part number as shown below.

Part Identification:

RT90555	C	44	4	12	S	Z
1	2	3	4	5	6	7

1. Connector Designation

RT 90555 Wall Mount Receptacle (Power Source)

RT 90556 Straight Plug

RT 90557 Cable Connecting Receptacle without Coupling Ring

RT 90558 Wall Mounting Plug with Coupling Ring (Equipment End)

2. Shell Finish

C: Conductive for Grounded Assemblies.

N: Non-Conductive Assemblies. Figure 1.

3. Shell Size (28, 32, 44, 52) Related to current carrying capacity

28 – 40 amperes

32 – 60 amperes

44 – 100 amperes

52 – 200 amperes

4. Shell/Keyway Position

1, 4, 5, and 6 positions are available to prevent cross mating of dissimilar voltages. Figure 2.

5. Insert Arrangement

Figure 3.

6. Contact Type

P: Pin

S: Socket

7. Alternate Insert Positioning

Discrimination of 60Hz and 400Hz assemblies is accomplished by alternate positioning of inserts.

Figure 2.

MASTER KEY/KEYWAY POSITIONS:
N designates normal position. Four other positions (1, 4, 5, and 6) of the master key/keyway prevent mating of incompatible voltages. Refer to the illustration above for applicability.