25kV, Medium Voltage URD Joint
For single-core 25-28kV, extruded dielectric bare and jacketed concentric neutral power cables


The Innovative Power Products, Inc. MVJ 250UD and MVJ 250T UDJ series joints are heatshrinkable systems for splicing bare or jacketed concentric neutral 25kV extruded dielectric, power cable. It uses special materials to control electrical stress at the connector and shield cutbacks and provides internal moisture seals. A heatshrinkable field control tubing controls stress over the connector and shield cutbacks. Insulating tubings reinstate the cable insulation across the joint and shielding tubing reshields the joint and forms a moisture seal to the cable semiconductive layer. A stainless steel constant force spring clamps the neutral wires to the joint. For jacketed concentric neutral cable, a tough abrasion resistant black jacketing tubing or wraparound sleeve provides the joint with external moisture seals and mechanical protection.

MVJ 250UD and 250T UDJ kits provide a lightweight, compact and environmentally sealed system for splicing bare or jacketed concentric neutral cable. These features allow the installation of this jointing system in duct systems, vaults, submersible or directburied applications. This joint is ideal for almost any non-tension application. The system is totally sealed. Joint failures in flooded vaults are eliminated.


  • MVJ kits are factory engineered to provide fast and easy installation with reliable lifetime performance.

    MVJ 250UD and 250T UDJ joints’ performance is based on the design and testing of the MVJ 250 series joint for metallic tape and wire shielded power cables.

    MVJ kits are designed to meet or exceed the requirements of the applicable sections of the following cable/cable accessory standard IEEE-404.

  • MVJ 250UD and 250T UDJ kits cover a wide range of conductor sizes. They accommodate out-of-round or off-tolerance cables. The MVJ 250UD and 250T UDJ kits can be used for size transitions within the actual kit’s cable use range. Three (3) kit sizes cover all cable sizes from #2 AWG through 1000 kcmil. When preparing the cable ends, pencilling of the insulation is not required.

Electrical Specifications: 25kV Related Joints
 
Test Requirement
Value MVJ 250UD(J)
AC withstand, 1 minute (60 hz)
52 kV PASS
DC withstand, 15 minutes
100 kV PASS
Partial Discharge (Corona) Voltage (<3pC)
21.6 kV >21.6 kV
Impulse withstand 1.2 x 50 μs (crest kV)
150 kV > 150kV
AC withstand 1 hour (60hz)
78 kV PASS
AC withstand 5 hour (60hz)
52 kV PASS
Continuous current rating
= Cable = Cable
Cyclical Submersion test (ANSI C119.2)
Pass 52 cycles Pass 52 cycles
     
Bill of Materials: Std. Pkg.: 1 kit = 1 each, 1/C joint
 
Key
Item Description
Quantity Supplied
1
Field Control Material
As Required In All Kits
2
Field Control Tube
1 per kit In All Kits
3
Insulating Tube
As Required In All Kits
4
Shielding Tube
1 per kit In All Kits
5
Spring Clamp, S.S.
1 per kit In All Kits
6
Black Jacketing Tube or Wraparound Sleeve***
1 per kit UDJ Kits Only
-
Cable Preparation Kit
1 per kit P - Pmod Kit**
-
Installation Guide
1 per kit In All Kits
       




  • To download a PDF copy of the data sheet Click here.

    For a complete PDF of the current IPP catalog Click Here. If you would like the catalog in a printed version, please go to the "Catalog Request" page via the link at the top of the page.



MVJ 250UD and MVJ 250T UDJ factory engineered kits are individually packaged single-core cable joints. Everything is included to splice one single-core cable less the butt-splice connectors. Connectors can be supplied in the kits; subject to factory quote.



  • MVJ 250UD & 250T UDJ series: Price List PL-645

25kv Selection Guide
Conductor Range
Catalog #

Insulation

Min.

Diameter
Max.
Jacket Diameter Max. Connector
Length Max.
Connector O.D.
Min.
Installed
Length Max.
Bare Concentric Neutral Cable Joint
1-3/0 AWG
MVJ 251UD
0.80 1.20 N/A 3.75 0.85 19.0
4/0-500 kcmil
MVJ 252UD
1.05 1.45 N/A 5.50 1.35 22.0
600-1000 kcmil
MVJ 253UD
1.40 1.85 N/A 8.00 1.85 25.0
               
Jacketed Concentric Neutral Cable Joint
1-3/0 AWG
MVJ 251UDJ
0.80 1.20 1.55 3.75 0.85 30.0
4/0-500 kcmil
MVJ 252UDJ
1.05 1.45 1.90 5.50 1.35 36.0
600-1000 kcmil
MVJ 253UDJ
1.40 1.85 2.25 8.00 1.85 40.0

All dimensions in inches unless shown otherwise


Ordering Information

1. Find your cable size in the selection guide above and identify the kit catalog number. This kit will be all that is needed to splice one single-core cable, less the butt-splice connectors. Confirm the dimensions when at the extremes of the size range.
SPACE
2. Add the mod kit letter designation as needed to change the base kit:

P - cable cleaning kit (Pmod)
     
Examples
     
Example 1:
1/C, 2/0 AWG, 25kV bare concentric neutral cable spliced to the same cable with a cable cleaning kit:
MVJ 251UDP

  Example 2:
1/C, 750 kcmil, 25kV jacketed concentric neutral (JCN) cable spliced to the same cable:
MVJ 253T UDJ

Note: for 28kV joint selection confirm dimensional data.


* CONNECTORS: To have connectors supplied in the kits, please refer to Section 5 in this catalog for connector selection information. The connectors must be ordered separately but can be packaged within the kits if detailed information is supplied.
** Supplied if specified.
*** WRAPAROUND SLEEVE with stainless steel channel– Contact IPP for more information.


QUESTIONS OR QUOTES EMAIL US AT: sales@ippcorp.com or CALL TOLL FREE 1-800-544-4626