General
Eaton's Cooper Power Series 600 A 35 kV Class T-OP II deadbreak connector is used to terminate high-voltage underground cable to transformers, switches, switchgear, and other apparatus. It is fully shielded and submersible and meets the requirements of IEEE Std 386-2016 "Separable Insulated Connector Systems."
The 200 A three-phase rated interface provides a means for obtaining a live test, visible ground, and visible break using a clampstick. It also provides a convenient location for an Eaton's Cooper Power Series metal oxide varistor elbow (M.O.V.E.) arrester, grounding elbow, or a 200 A tap line.
Eaton's Cooper Power Series offers an optional capacitive test point similar to its 200 A elbow connectors. This allows use of test point faulted circuit indicators.
T-OP II connectors are designed for use on solid dielectric cable (XLPE or EPR) with extruded semi-conducting shields. Installation on jacketed cable may require additional sealing material. Adapters are available for terminating tape shield and drain wire UniShield™ jacketed cable.
Ratings
900 A Rating: The T-OP II connector system is rated for 900 A continuous when installed on a copper bushing.
200 kV BIL Rating: The T-OP II connector is available with an optional 200 kV BIL rating, allowing you to match the BIL rating of the system and the equipment to which it will be connected.
Installation
The T-body is assembled onto prepared cable with a threaded coppertop compression connector or shear bolt. The loadbreak-reducing tap plug (LRTP) is threaded into the connector by using a 5/16 inch T-wrench. The short end of a special copper alloy stud, provided with the kit, is threaded into a de-energized 600 A bushing. The assembled housing is then connected to the apparatus bushing using an O&T/torque tool. The T-OP II connector's unique captured rotating nut feature provides ease of removal of the T-OP II system from the apparatus bushing. Refer to Installation Instruction Sheet MN650051EN for details.
Production Tests
Tests are conducted in accordance with IEEE Std 386-2016:
- ac 60 Hz 1-minute withstand
- 50 kV/70 kV
- Minimum partial discharge extinction voltage: 26 kV
Tests are conducted in accordance with Eaton requirements:
- Physical inspection
- Periodic dissection
- Periodic fluoroscopic analysis
Voltage Ratings and Characteristics
| Description | kV |
|---|---|
| Standard voltage class | 35 |
| Maximum rating phase-to-phase (loadbreak-reducing tap plug only) | 36.6 |
| Maximum rating phase-to-ground | 21.1 |
| ac 60 Hz 1-minute withstand | |
| 150 kV BIL Class T-OP II | 50 |
| 200 kV BIL Class T-OP II | 70 |
| dc 15-minute withstand | 103 |
| BIL and full wave crest | 150/200 |
| Minimum partial discharge extinction voltage | 26 |
Note: Voltage ratings and characteristics meet or exceed IEEE Std 386-2016.
Current Ratings and Characteristics
| Description | Amperes |
|---|---|
| 600 A Interface | |
| Continuous | 600/900 A rms |
| 24-hour overload | 1000 A rms |
| Short time | 40,000 A rms symmetrical for 0.20 s; 27,000 A rms symmetrical for 4 s |
| 200 A Interface | |
| Continuous | 200 A rms |
| Switching | 10 operations at 200 A rms at 21.1 kV |
| Fault closure | 10,000 A rms symmetrical at 36.6 kV for 0.17 s |
| Short time | 10,000 A rms symmetrical for 0.17 s; 3500 A rms symmetrical for 3 s |
a System design and protection must recognize the ratings of 200 A interface.
b Switching rating limited to single-phase 21.1 kV.
Note: Current ratings and characteristics meet or exceed IEEE Std 386-2016.
Features and Benefits
Loadbreak-reducing tap plug (LRTP): 200 A, three-phase fault close rated. Features a captured rotating nut system that threads onto a copper alloy stud in the apparatus bushing, providing a mechanical backoff feature for removal.
T-body: Molded T-body adapts to different cable sizes and provides a deadfront shielded connection.
Compression connector: 15/16 inch – 9 NS threaded coppertop compression connector ensures a cool-running connection with maximum current transfer and high mechanical strength.
Semiconducting shield: Precision-molded peroxide cured semi-conducting shield provides ground shield continuity and meets IEEE Std 592E-2007 requirements.
Capacitive test point: (Optional) On molded T-body with snap-on cap, provides a location for Eaton's Cooper Power Series test point faulted circuit indicators.
Semi-conducting insert: Precision-molded semi-conducting insert provides corona-free electrostatic shielding of the compression connector.
Drain wire tab: Molded into the semi-conductive shield for attaching a drain wire to maintain deadfront safety.
EPDM insulation: High-quality peroxide cured EPDM insulation.
Alignment segment: The LRTP eliminates cross-threading of the compression connector and ensures proper torque installation in the T-body. A shear pin disengages the alignment segment upon reaching proper torque for removal.
Cable adapter: Molded cable adapter, sized for cable insulation diameters from 0.875 to 1.965 inches (22.2 to 49.9 mm), provides stress relief for the terminated cable.
Copper alloy stud: Extended length allows threading into the connector before bushing and terminator interfaces mate. Blunt start threads help eliminate cross-threading. Stud threads into an industry-standard 600 A bushing.
Figure 1: T-OP II cutaway design features
Textual Description: The diagram shows a cutaway view of the T-OP II connector. Key components illustrated include: the T-body, which houses the connection and provides shielding; the loadbreak-reducing tap plug (LRTP) with its captured rotating nut; the compression connector for cable termination; the semiconducting shield and insert for electrical shielding; EPDM insulation; a cable adapter for stress relief; a copper alloy stud that interfaces with the apparatus bushing; and a drain wire tab.
Optional Features and Tools
Optional Features:
- Protective cap: 200 A insulated protective cap fits over the loadbreak-reducing tap plug for deadfront shielding.
- Capacitive test point: On molded T-body with snap-on cap, provides a place to mount Eaton's Cooper Power Series STVT, STLO, and STHI faulted circuit indicators.
- Copper alloy stud: (As described in Features section)
Tools:
- T-wrench: Used to install the loadbreak-reducing tap plug into the compression connector and T-body.
- Torque tool: Required to check the torque of a 35 kV Class T-OP II deadbreak connector or bushing adapter when installed on a 600 A bushing interface. It is precision calibrated and hotstick operable.
- Combination operating and test/torque tool: Used with a hotstick to test for circuit de-energization and to install/remove a 35 kV Class LRTP equipped connector from an apparatus tap. It includes a molded EPDM rubber cap and torque limiter for proper tool seating and connector torquing.
- 5/16-inch hex shaft: A 5/16-inch hex shaft with a 3/8-inch socket drive tool.
Figure 2: T-OP II connector profile and stacking dimensions in inches (mm)
Textual Description: This diagram illustrates the profile and stacking dimensions of the T-OP II connector. It shows various measurements labeled A, B, C, D, S2, S3, and S5, with their corresponding values provided in inches and millimeters: A: 18.10 inches (459.7 mm), B: 0.22 inches (5.6 mm), C: 0.25 inches (6.3 mm), D: 12.89 inches (327.4 mm), S2: 0.50 inches (12.7 mm), S3: 12.46 inches (316.5 mm), S5: 2.84 inches (72.1 mm).
Ordering Information
Each BOL-T connector kit contains: Molded rubber T-body, Insulating plug, Cap, Compression or shear bolt connector, Cable adapter, Silicone lubricant, Installation instruction sheet.
A 35 kV T-OP II connector is available with or without a protective cap and with or without the test point. Use the following procedure to develop the correct part number for the desired T-OP II connector kit, based on cable size, conductor size, and desired options.
T-OP II Connector Kit Catalog Numbering System: Build an 8- to 10-digit catalog number by following the steps. The first 3 digits are "TP6". Digits 4 through 8 are selected based on specifications, and digits 9 and 10 are optional.
Catalog number digits:
- 1 and 2: "TP" = T-OP II connector system
- 3: "6" = 600 A system
Step 1. Select digits 4 and 5 (BIL version):
- "35" = 35 kV class bushing interface, 150 kV BIL
- "38" = 35 kV class bushing interface, 200 kV BIL
Step 2. Select digit 6 (Cable adapter range code): Determine the cable's diameter over the electrical insulation (refer to Figure 3). Identify the cable range from Table 3 that covers the minimum and maximum insulation diameters. Select the corresponding cable range code.
| Inches | mm | Cable range code |
|---|---|---|
| 0.875–0.985 | 22.2–25.0 | D |
| 0.930–1.040 | 23.6–26.4 | E |
| 0.980–1.115 | 24.9–28.3 | F |
| 1.040–1.175 | 26.4–29.8 | G |
| 1.095–1.240 | 27.8–31.5 | H |
| 1.160–1.305 | 29.5–33.1 | J |
| 1.220–1.375 | 31.0–34.9 | K |
| 1.285–1.395 | 32.5–35.4 | L |
| 1.355–1.520 | 34.4–38.6 | M |
| 1.485–1.595 | 37.7–40.5 | N |
| 1.530–1.640 | 38.9–41.7 | P |
| 1.575–1.685 | 40.0–42.8 | Q |
| 1.665–1.785 | 42.3–45.3 | R |
| 1.755–1.875 | 44.6–47.9 | S |
| 1.845–1.965 | 46.9–50.0 | T |
| 1.960–2.210 | 49.8–56.1 | U |
Step 3. Select digits 7 and 8 (Conductor code): Identify the conductor size and type in Table 4 (compression) or Table 5 (shear bolt) and select the conductor code from the appropriate column.
| Concentric or compressed AWG or kcmil | mm² | Compact or solid AWG or kcmil | mm² | Conductor code |
|---|---|---|---|---|
| No connector | 0 | |||
| #2 | 35 | #1 | 11 | |
| #1 | 1/0 | 50 | 12 | |
| 1/0 | 50 | 2/0 | 70 | 13 |
| 2/0 | 70 | 3/0 | 14 | |
| 3/0 | 4/0 | 95 | 15 | |
| 4/0 | 95 | 250 | 120 | 16 |
| 250 | 120 | 300 | 17 | |
| 300 | 350 | 18 | ||
| 350 | 400 | 185 | 19 | |
| 400 | 185 | 450 | 20 | |
| 450 | 500 | 240 | 21 | |
| 500 | 240 | 600 | 300 | 22 |
| 600 | 300 | 700 | 23 | |
| 650 | 750 | 24 | ||
| 750 | 900 | 25 | ||
| 900 | 1000 | 500 | 26 | |
| 1000 | 500 | 27 | ||
| 1250 | 630 | 1250 | 28 |
| Cable conductor size AWG or kcmil | mm² | standard Concentric sizes | Conductor code | Catalog number |
|---|---|---|---|---|
| 1/0 | 1/0 | 50 | S1 | CDT630SB150T |
| 2/0 | 2/0 | 70 | ||
| 3/0 | 3/0 | -- | ||
| 4/0 | 4/0 | 95 | ||
| 250 | 250 | 120 | ||
| 350 | -- | 150 | S3 | CDT630SB300T |
| -- | 350 | 185 | ||
| 500 | 500 | 240 | ||
| 600 | 600 | 300 | ||
| 700 | -- | -- | S4 | CDT630SB400T |
| -- | 700 | -- | ||
| 750 | 750 | -- | ||
| 800 | 800 | 400 | ||
| 900 | -- | -- | S6 | CDT1250SB630T |
| -- | -- | 800 | ||
| -- | 900 | -- | ||
| 1000 | 1000 | 500 | ||
| -- | 1100 | -- | ||
| -- | 1200 | -- | ||
| -- | 1250 | 630 | S8 | CDT1250SB800T |
| -- | 1300 | -- | ||
| -- | 1400 | -- | ||
| -- | 1500 | 800 |
Figure 3: Typical construction of medium-voltage underground cable
Textual Description: This diagram illustrates the cross-section of a medium-voltage underground cable, showing its layers from the outside in: Outer jacket, Metal neutral or shield, Insulation shield, Diameter over insulation, Insulation, Conductor shield, and Conductor.
Step 4. Select digit 9 and 10 (Optional):
- "TC" = T-OP II connector kit with a capacitive test point and protective cap
- "C" = T-OP II connector kit with a protective cap (no capacitive test point)
- Blank = T-OP II connector kit without capacitive test point or protective cap
Example: Select a 200 kV BIL T-OP II connector kit without a capacitive test point, with a protective cap for a 4/0 compressed cable with a nominal insulation diameter of 1.26 inches.
- Step 1: Select digits 4 and 5 for 200 kV BIL bushing interface: "TP638".
- Step 2: Select digit 6 for cable range. Nominal diameter 1.26 ± 0.030 inches. Minimum diameter 1.23 inches, maximum diameter 1.29 inches. From Table 3, the range 1.23–1.29 inches corresponds to "J" or "K". Let's use "J".
- Step 3: Select digits 7 and 8 for conductor code. 4/0 compressed cable. From Table 4, "4/0" under "Concentric or compressed" has conductor code "16".
- Step 4: Select digit 9 for protective cap. Use "C".
Order catalog number: TP638J16C.
Accessories: For replacement compression connectors, shear bolts, and cable adapters, see Catalog Data CA650006EN, "Deadbreak Accessories, Tools, and Replacement Parts."
| Description | Catalog number (150 kV BIL) | Catalog number (200 kV BIL) |
|---|---|---|
| T-body without test point | DT635 | DT638 |
| T-body with test point | DT635T | DT638T |
| Loadbreak-reducing tap plug (LRTP) | LRTP635 | LRTP638 |
| Operating and test/torque tool with cap | OTTQ635 | OTTQ635 |
| Installation torque tool | TQHD635 | TQHD635 |
| 5/16-inch T-wrench | TWRENCH | TWRENCH |
| Copper alloy stud for use with T-OP II | STUD-T | STUD-T |
| 200 A, 35 kV class insulated protective cap | LPC235 | LPC238 |
| 5/16-inch threaded coppertop connector | CC6CaT | CC6CaT |
| Cable adapters | CA635ᵇ | CA638ᵇ |
| 5/16-inch hex shaft with 3/8-inch drive socket | HD635 | HD635 |
| Operating and test tool with cap | OT635 | OT635 |
a Use Table 4 and/or Table 5 for conductor code.
b Use Table 3 to select cable range code.
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