Eaton Magnefix MD4 User Manual
  1. Manuals
  2. Brands
  3. Eaton Manuals
  4. Switch
  5. Magnefix MD4
  6. User manual

Eaton Magnefix MD4 User Manual

Medium-voltage switchgear
Hide thumbs
Table of Contents

Advertisement

Quick Links

MV switchgear
Magnefix MD4
User manual 991.184 G01 03
Installation, connection, operation, checking, commissioning, decommissioning and maintenance of
Magnefix MD4 medium-voltage switchgear should only be carried out by suitably qualified personnel.
User manual
Medium-voltage switchgear
Magnefix MD4
991.184 G01 03
Eaton Industries (Netherlands) B.V.
P.O. Box 23, 7550 AA Hengelo, The Netherlands
tel:
+31 74 246 91 11
fax:
+31 74 246 44 44
e-mail:
info.electric@eaton.com
Internet:
www.eaton.eu
in the event of a malfunction
Eaton Electrical Solutions & Services: tel: +31 74 246 68 88

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Magnefix MD4 and is the answer not in the manual?

Questions and answers

Related Manuals for Eaton Magnefix MD4

Summary of Contents for Eaton Magnefix MD4

  • Page 1 Eaton Electrical Solutions & Services: tel: +31 74 246 68 88 Installation, connection, operation, checking, commissioning, decommissioning and maintenance of Magnefix MD4 medium-voltage switchgear should only be carried out by suitably qualified personnel.
  • Page 2 Administrative data Version number: G01 03 Date of issue: 30-10-2013 991.184 G01 03...

  • Page 3: Table Of Contents

    Magnefix MD4 CONTENTS INTRODUCTION ..................7 General system description .................. 7 Using the user manual ..................7 1.2.1 Target group ......................7 1.2.2 Structure of the user manual ................... 7 Safety regulations ....................8 1.3.1 General instructions ....................8 1.3.2 Switch room safety ....................
  • Page 4 Plastic-insulated cable in a top connection ............62 3.8.4 Connecting cables 95 mm and over using alternative materials ......63 3.8.5 Connecting Eaton 16 mm transformer cable to the protected branch of the universal clamps ........................64 991.184 G01 03...
  • Page 5 Magnefix MD4 Connection of plastic-insulated cables to Protected panels ......67 3.9.1 Plastic-insulated cable with copper core up to 3 x 70 mm ........67 3.9.2 Connection of plastic-insulated cables with copper cores, 3 x 95 mm up to 3 x 240 mm .......................
  • Page 6 Magnefix MD4 Cleaning ......................99 6.3.1 Switchgear has been isolated ................99 Inspection and maintenance schedule............. 100 6.4.1 Periodic checks ....................100 6.4.2 Periodic check of protected panel ................ 100 6.4.3 Maintenance ....................... 100 Topping up grease-filled cable boxes for paper-insulated lead-covered cables101 Fault diagnosis ....................

  • Page 7: Introduction

    This chapter describes only those operations that may be carried out by the user. Operations not included in the manual must be carried out by or under the supervision of Eaton. 991.184 G01 03...

  • Page 8: Safety Regulations

    Magnefix MD4 Chapter 7 - Accessories Safety standards This chapter gives a summary of available accessories and Magnefix switchgear without protected panel complies with spare parts. the following standards: Chapters 8 and 9 are explanatory chapters of a general IEC 62271-103: High voltage switches for rated voltages nature.

  • Page 9: Notation Guide

    A complete type plate is made up of a main type plate with Important note for clarification. supplementary type plates as required. The main type plate is headed with the Eaton logo and address. EMARK Useful advice. 991.184 G01 03...
  • Page 10 Magnefix MD4 type plate (main section) of the fixed part (example) supplementary type plate (most commonly used) on vacuum circuit-breaker (example) Variable Description unit (English) (English) system rel. release serial.no. Serial number year of constr. year of construction w.o.no. work order number...

  • Page 11: System Description

    The busbars are situated completely inside the epoxy resin insulation. Magnefix MD4 switchgear is easy to install on site. Configuration Magnefix switchgear comes in two configurations: Magnefix switchgear offers high operational reliability, even ...

  • Page 12: The Fuse Panel

    Magnefix MD4 2.1.5 The fuse panel Switching on the switch caps To switch on, put a switch cap on the springing handle. The fuse panel has a three-phase cable-connection point Next, push the switch cap against the cam using the and three fuse holders with removable caps.

  • Page 13: The Indicators

    Actions which are not described at all may only be The protected panel has a position indicator at the front (in carried out in consultation with an Eaton specialist. the panel diagram). This position indicator operates The instructions of this specialist must be followed mechanically.

  • Page 14: Safety Features

    2.2.2 Safety features Working on live or partly live installation:  Eaton advises, for the necessary safety, never to work The switchgear is provided with the following safety on live or partly live installations. This is described in features: ...

  • Page 15: General Technical Data

    Magnefix MD4 2.3 General technical data This section contains general technical data only. For details concerning your own system, please refer to the information pack supplied with it, which includes this manual. 2.3.1 Electrical data Rated values: Voltage Impulse withstand voltage...

  • Page 16: Dimensions And Weights

    Magnefix MD4 2.3.2 Dimensions and weights Dimensions – upright version Panel name width weight Cable panel (including switch caps) 91 mm 15 kg Busbar connection 91 mm 7.5 kg Connecting panel 91 mm 4.5 kg Busbar connecting panel (sectional panel including switch caps) 182 mm 19.5 kg...
  • Page 17 Magnefix MD4 Dimensions – wall-mounted version Panel name widths weight Cable panel (including switch caps) 91 mm 15 kg Busbar connection 91 mm 7.5 kg Connecting panel 91 mm 4.5 kg Busbar connecting panel (sectional panel including switch caps) 182 mm 19.5 kg...

  • Page 18: Seg Protection Relay

    Magnefix MD4 2.3.3 SEG protection relay The protection relay is fitted in a separate secondary compartment under the switching mechanism for the protected panel. This protection relay comes with a separate manual. This manual is part of the information pack.

  • Page 19: Setting Up The System

    In accordance with IEC 62271-1 par. 2.1.1 the climate in Transport for the Magnefix switchgear can be arranged by the switchroom must comply with the following Eaton. Detailed instructions are beyond the scope of this requirements: manual. Please contact Eaton Service if necessary. You ...

  • Page 20: Ventilation

    Magnefix MD4 3.2.2 Ventilation Magnefix MD4 switchgear does not require ventilation. However, air circulation around the switchgear may carry dust liable to deposit on the installation. Take the following precautions in order to prevent undesirable air circulation: General  Ensure that the switchroom doors provide a good seal in order to prevent draughts.

  • Page 21: Floor

    Magnefix MD4 3.2.4 Floor General Seal cable entries as perfectly as possible. Cable trench  Fill the cable trench with gritty sand.  Cover the sand with a suitable material (e.g. polyurethane foam which has a closed cellular structure). Ventilation: Left: Unsealed floor, risk of contamination.

  • Page 22: Assembling The Upright Frame

    Magnefix MD4 3.3 Assembling the upright frame AUTION Fit a toothed washer below each screw or bolt head and nut. This is to obtain a proper earth connection. 3.3.1 Parts list of upright frame Part Qty. Description Frame leg Triple plastic cable clamp for 3 x 1 cables (20mm - 43mm)

  • Page 23: Assembling The Frame Legs

    Magnefix MD4 3.3.3 Assembling the frame legs Assemble the frame legs (a) (2 x 2) using the relevant fastening materials. 3.3.4 Fixing the front C-sections Fit the adjustable distance plates (d) and/or (e) to the C-sections (c). Fit the triple plastic cable clamp (b) to the C- section (c).

  • Page 24: Fitting The Branch Earth Bar

    Magnefix MD4 3.3.7 Fitting the branch earth bar Fit the branch earth bar (g) to the earth bar (f). 3.3.8 Fitting the cross coupling Fit cross coupling (k) to the rear of frame leg (a) using the fasteners. 1, 2 3.3.9...

  • Page 25: Position The Switchgear On The Frame

    Magnefix MD4 3.3.11 Position the switchgear on the frame Unpack the switchgear. Remove any switch and fuse caps, if installed. Remove the switch caps and the fuse caps from the switchgear. Make sure no dust or dirt can penetrate into the switch and fuse caps.

  • Page 26: Fit The C-Section To The Front Of The Frame (Systems With Protected Panel Only)

    Magnefix MD4 3.3.13 Fit the C-section to the front of the frame (systems with Protected panel only) Fit the C-section to the front of the frame after connecting the cables (Chapter 3.9). Fit the cable support section (r) to the underside of the C-section (p).

  • Page 27: Assembling The Wall Frame

    Magnefix MD4 3.4 Assembling the wall frame 3.4.1 Parts list for the wall frame Part Qty. Description Vertical post Triple plastic cable clamp for 3 x 1 cables (20mm - 43mm) C section Adjustable distance plate for steel cable clamp...

  • Page 28: Assembling The Wall Frame

    Magnefix MD4 3.4.3 Assembling the wall frame Fit a horizontal suspension beam (k) to the vertical posts (a) using the fastening materials. 3.4.4 Fixing the front C sections Fit the adjustable distance plates (d) to the C-sections (c). Fit the triple plastic cable clamp (b) to the C- section (c).

  • Page 29: Preparing Fixed Section

    Magnefix MD4 3.4.7 Preparing fixed section Remove the switch caps and the fuse caps from the switchgear. Make sure no dust or dirt can penetrate into the switch and fuse caps. Lay the fixed part of the switchgear on wooden blocks to avoid damage to the interlock.

  • Page 30: Fixing The Earth Strip

    Magnefix MD4 3.4.10 Fixing the earth strip Fix the earth strip (l) to the frame (a) using the fastening materials supplied. 3.4.11 Fitting the dust cap Fit the dust cap between the side plates. 3.4.12 Fitting the C-section in lower station...

  • Page 31: Connecting The Cables, General

    Magnefix MD4 3.5 Connecting the cables, general Cables may only be connected: • by authorised and qualified personnel; • in accordance with the instructions in this manual; • in accordance with the instructions of the cable manufacturer. IFE HAZARD •...

  • Page 32: Fixing The Cable Cores

    Magnefix MD4 3.5.3 Fixing the cable cores Universal cable core clamps. Universal cable core clamps can be used for connecting:  PILC cables with copper cores up to 3 x 70 mm  XLPE cables with copper cores up to 3 x 70 mm Universal cable core clamps, Cu, up to 70 mm Concentric cable core clamps.

  • Page 33: Cable Boxes For Paper-Insulated Lead-Covered Cables (Pilc)

    Magnefix MD4 3.5.4 Cable boxes for paper-insulated lead- covered cables (PILC) The following plastic cable boxes are used for connecting paper-insulated lead-covered cables:  1 cable box for PILC, Cu, up to 3 x 70 mm Small and medium-sized cable boxes for PILC cable ...

  • Page 34: Cable Boxes For Plastic-Insulated Cables (Xlpe)

    Cable boxes to non-standard specification It is possible to use a different make of cable box or a combination of an Eaton cable box with a non-standard cable termination material. In this case terminate the cable and/or cable box in accordance with the instructions of the relevant manufacturer.

  • Page 35: Connecting The Paper-Insulated Lead-Covered Cables (Gplk)

    Magnefix MD4 3.6 Connecting the paper-insulated lead- covered cables (GPLK) 3.6.1 PILC with copper core up to 3 x 70 mm , universal clamps ARNING  Always earth the installation. • Never work on a live or partly live installation.
  • Page 36 Magnefix MD4 Saw off the cable box in accordance with the diameter (d) measured across the lead sheath. Take into account that several layers of polyethylene tape are to be applied over the lead sheath. Deburr sharp edges. 3, 4 Degrease the upper side of the lead sheath and sand it lightly, for example, with a scouring pad.
  • Page 37 Magnefix MD4 12. Fix the cable in the cable clamp (c) at position (M) previously marked. Move the distance piece (b) until the centre of the cable is exactly in line with the centre of the cable box. Firmly tighten the cable clamp.
  • Page 38 Magnefix MD4 22. Hang a double folded nylon thread (a) over the edge of each opening in the cable box (b), with the ends hanging inside. 23. Now slide the cable box completely on to the cast resin insulation. 24. Fit the protection covers (c) at the rear side and secure them.

  • Page 39: Pilc With Copper Cores, 3 X 95 Mm Up To 3 X 150 Mm , Concentric Clamps

    For cables with an aluminium core 1B Crimp cable clamp, Al, up to 240 mm Eaton cable core clamps are only suitable for connecting cables with a copper core. Aluminium cables are to be connected to the Magnefix copper connection pins using copper/aluminium crimp cable sockets.
  • Page 40 Magnefix MD4 Procedure Incise the cable at the correct length, as shown.  L1 = 700 mm EMARK To simplify insertion of the cable cores in the right tubes of the cable box, it is recommended to cut the cable cores to different lengths.
  • Page 41 Magnefix MD4 Slide the cable box on to the cast resin insulation of the panel. Draw the cable beside the cable box until the polyethylene tape protrudes about 10 mm below the cable box. Mark the cable with a line (M) immediately above the cable clamp (A).
  • Page 42 Magnefix MD4 18. Fit the connecting pieces (1) to the connection pins using one of the washers (2a). 19. Tighten the hexagon socket head screws (torque 15 Nm (11 lbf)). Ensure that the screws are fitted in the same direction angled forward (approx.
  • Page 43 Magnefix MD4 25. Hang a double folded nylon thread (a) over the edge of each opening in the cable box (b), with the ends hanging inside. 26. Now slide the cable box completely on to the cast resin insulation. 27. Fit the protection covers (c) at the rear side and secure them.

  • Page 44: Pilc With Copper Or Aluminium Cores Up To 3 X 240 Mm , Gland Entry

     2 steel cable clamps For cables with an aluminium core Eaton cable core clamps are only suitable for connecting cables with a copper core. Aluminium cables are to be connected to the Magnefix copper connection pins using copper/aluminium crimp cable sockets.
  • Page 45 Magnefix MD4 Procedure Incise the cable at the correct length, as shown.  L1 = 650 mm Terminate the cable, as shown.  L2 = 175 mm  d = diameter across the lead sheath Remove the lead sheath over distance (d).
  • Page 46 Magnefix MD4 Slide the cable box on to the cast resin insulation of the panel. Draw the cable beside the cable box (g) such that the bottom of the O ring (f) is about 25 mm higher than the bottom of the cable box.

  • Page 47: With Plastic Entry Bushing47

     2 washers with hexagon socket head screws (2)  1 gland (3)  2 steel cable clamps For cables with an aluminium core Eaton cable core clamps are only suitable for connecting cables with a copper core. Aluminium cables are to be connected to the Magnefix...
  • Page 48 Magnefix MD4 Procedure Incise the cable at the correct length, as shown.  L1 = 650 mm Terminate the cable, as shown.  L2 = 175 mm  d = diameter across the lead sheath Remove the lead sheath over distance (d).
  • Page 49 Magnefix MD4 Grease the O-ring (f) using silicone grease or acid-free Vaseline. Place the O ring in the upper recess of the plastic entry bushing (h). Press the plastic entry bushing in the cable box (b) and fit the two fixing shells (k) in the lower recess of the entry bushing.
  • Page 50 Magnefix MD4 15. Slide the entry bushing (h) up the cable (a). 16. Slide the cable box (b) up the cable and then up the entry bushing. 15, 16 17. Fix the cable in the cable clamp (c) at position (M) previously marked.

  • Page 51: Filling The Cable Box For Paper-Insulated, Lead-Covered Cables

    Magnefix MD4 3.7 Filling the cable box for paper-insulated, lead-covered cables 3.7.1 Materials required Can of grease for the cable box with closed cover for transport and storage. Hand pump. Filling device with filling tube and valve. Filling hose with hose clip, shut-off ring and connector nipple.
  • Page 52 Magnefix MD4 Secure the filling device by firmly tightening the screw in the top plate. Using the hose clip, firmly attach the hose to the filling tube of the filling device. Remove the nylon locking pin and the rubber sealing from the cable box.
  • Page 53 Magnefix MD4 15. Close the filling hose using the shut-off ring. 16. Reduce the pressure on the can by completely opening the valve. 17. Undo the hose clip and remove the can from the filling hose. 18. Hold the can in such a way that the grease in the filling hose cannot come into contact with the valve, to avoid clogging.
  • Page 54 Magnefix MD4 23. The lead sheath can now be earthed. Earthing should be done right above the outer cable sheath so that the cable box can be lowered, if necessary. This earth connector has to be attached to the horizontal earth bar.

  • Page 55: Connection Of Plastic-Insulated Cables To C(Able) And T(Ransformer) Panels

    Magnefix MD4 3.8 Connection of plastic-insulated cables to C(able) and T(ransformer) panels 3.8.1 Plastic-insulated cable with copper core up to 3 X 70 mm , universal clamps ARNINGG • Always earth the installation. • Never work on a live or partly live installation.
  • Page 56 Magnefix MD4 Proceed as follows: Pull up the cable and fix it in the cable clamps. Firmly tighten the clamps. Terminate the cable in accordance with the instructions of the cable supplier. Cut off the cable cores 2 to 3 mm below the cast resin insulation (a).
  • Page 57 Magnefix MD4 Turn the sealing plugs inside out. Using a pair of sharp scissors, carefully cut a hole in the conical part of the sealing plugs without making any notches. The diameter of this hole should be half the diameter of the core insulation.

  • Page 58: Connection Of Plastic-Insulated Cables With Copper Cores, 3 X 95 Mm Up To 3 X

    1A Concentric cable core clamps Cu 95 to 240 mm For cables with an aluminium core Eaton cable core clamps are only suitable for connecting cables with a copper core. Aluminium cables are to be connected to the Magnefix copper connection pins using copper/aluminium crimp cable sockets.
  • Page 59 Magnefix MD4 Proceed as follows: Pull up the cable and fix it in the cable clamps. Firmly tighten the clamps. Terminate the cable in accordance with the instructions of the cable supplier. Cut off the cable cores 2 to 3 mm below the cast resin insulation.
  • Page 60 Magnefix MD4 Turn the sealing plugs inside out. Using a pair of sharp scissors, carefully cut a hole in the conical part of the sealing plugs without making any notches. The diameter of this hole should be half the diameter of the core insulation.
  • Page 61 Magnefix MD4 Section of a correct termination 17. Slide the insulating conduits and the rubber sleeves on to the cast resin insulated members. Check that the flattened sides of the washers around the insulating conduits abut. 18. Fit both protective covers (d) and secure them. Make sure that the conduits adequately rest on the bearing faces of the protection covers.

  • Page 62: Plastic-Insulated Cable In A Top Connection

    Magnefix MD4 3.8.3 Plastic-insulated cable in a top connection A top connection has a construction similar to that of a bottom connection. But with a top connection the insulating conduits around the connection pins are filled with a moisture-repellent filling compound.

  • Page 63: Connecting Cables 95 Mm And Over Using Alternative Materials

    In deviation from the above procedure, an alternative method can be used to connect the cables. If in doubt, please contact Eaton Service for advice. ARNING Connect aluminium cables to the copper connection pins of the Magnefix using copper/aluminium crimp cable sockets.

  • Page 64: Connecting Eaton 16 Mm Transformer Cable To The Protected Branch Of The Universal Clamps

    Never work on a live or partly live installation. These rubber sleeves are not resistant to cable grease. Eaton cable core clamps are only suitable for connecting copper-cored plastic-insulated cable. Eaton transformer cable. Any length L is available to order.
  • Page 65 Magnefix MD4 Slide the insulating conduits and the rubber sleeves onto the cast resin insulated members of the terminal block. The flattened sides of the washers around the insulating conduits must abut. Fix the cable and the rubber rings on the cable in the cable clamps.
  • Page 66 Magnefix MD4 The bending radius of the cable must be at least 30 cm. 10. Connect the cable to the transformer. 11. Protect the connections using the plastic guard. 991.184 G01 03...

  • Page 67: Connection Of Plastic-Insulated Cables To Protected Panels

    Magnefix MD4 3.9 Connection of plastic-insulated cables to Protected panels 3.9.1 Plastic-insulated cable with copper core up to 3 x 70 mm ARNING • Always earth the installation. • Never work on a live or partly live installation. Required materials ...
  • Page 68 Magnefix MD4 Proceed as follows: Pull up the cable and fix it in the cable clamps. Firmly tighten the clamps. Terminate the cable in accordance with the instructions of the cable supplier. Cut off the cable cores 2 to 3 mm below the cast resin insulation.
  • Page 69 Magnefix MD4 Turn the sealing plugs inside out. Using a pair of sharp scissors, carefully cut a hole in the conical part of the sealing plugs without making any notches. The diameter of this hole should be half the diameter of the core insulation.
  • Page 70 Magnefix MD4 15. Slide the insulating conduits and the rubber sleeves on to the cast resin insulated members. 16. Place the protection tubes (d) and hand-tighten the screws (e). Make sure that the insulating conduits adequately rest on the bottom-most locking screws of the protection tubes.

  • Page 71: Connection Of Plastic-Insulated Cables With Copper Cores, 3 X 95 Mm Up To 3 X

    Terminate the cable cores and the splice in accordance with the cable manufacturer’s instructions. For cables with an aluminium core Eaton cable core clamps are only suitable for connecting cables with a copper core. Aluminium cables are to be connected to the Magnefix...
  • Page 72 Magnefix MD4 Proceed as follows: Pull up the cable and fix it in the cable clamps. Firmly tighten the clamps. Terminate the cable in accordance with the instructions of the cable supplier. Cut off the cable cores 2 to 3 mm below the cast resin insulation.
  • Page 73 Magnefix MD4 Using a pair of sharp scissors, carefully cut a hole in the conical part of the sealing plugs without making any notches. The diameter of this hole should be half the diameter of the core insulation. Restore the sealing plugs to their normal shape.
  • Page 74 Magnefix MD4 Section of a correct termination 17. Slide the insulating conduits and the rubber sleeves on to the cast resin insulated members. 18. Place the protection tubes (d) and hand-tighten the screws (e). Make sure that the insulating conduits adequately rest on the bottom-most locking screws of the protection tubes.

  • Page 75: System Operation

    Magnefix MD4 For the protected panel 4. SYSTEM OPERATION The vacuum circuit-breaker of the protected panel can only This chapter contains the operating procedures for Eaton be switched on if the adjacent switch caps have been Magnefix switchgear pulled out.

  • Page 76: Switching

    Magnefix MD4 4.2 Switching Magnefix switchgear is intended for switching rated voltages and currents. Switching operations are always triggered by fitting or removing switch caps using the springing handle. The procedures for switching on and off are detailed below. EMARK Text printed in italics shows the result of an action.
  • Page 77 Magnefix MD4 Switching on a protected panel For the vacuum-circuit-breaker The vacuum circuit-breaker can be switched on for two purposes:  for normal operation;  for maintenance work. Procedure for normal operation It is assumed that the switch caps of the corresponding branch-circuit panel have been removed.
  • Page 78 Magnefix MD4 Switching on for maintenance It is assumed that the switch caps of the corresponding branch-circuit panel have been removed. Check that the protection relay has been reset. Reset a triggered protection relay. ARNING By removing the switch-off/interlocking key you...

  • Page 79: Switching Off

    Magnefix MD4 4.2.2 Switching off Switching off the cable panel and branch-circuit panel ARNING Refer to the safety instructions in paragraph 4.1.2. Procedure for switch caps Place the springing handle on the switch cap. Pull the handle firmly.  The switch cap disengages from the fixed part.

  • Page 80: Changing A Fuse

    Magnefix MD4 4.3 Changing a fuse AUTION The fuses are very fragile, so handle them with care. • Avoid impact forces and shocks. • Never allow the fuse link or filled fuse holder cap to rest directly against a wall.

  • Page 81: Resetting An Overcurrent Indicator

    Magnefix MD4 4.4 Resetting an overcurrent indicator A switch cap can be provided with an indicator (a) for passing short-circuit currents. The switch cap has a small round window showing the rated value of the breaking current. The moment the current passing through the switch cap exceeds the value to which the indicator has been set, a red flag appears in the window of the switch cap.

  • Page 82: Voltage Indication

    Magnefix MD4 4.6 Voltage indication A single-pole voltage tester (type UNL) is available for detecting voltages. The single-pole voltage tester consists of two parts:  the probe (1) with exchangeable test point (1);  the grip (4). The probe is screwed onto the grip before use. During transport of the tester the probe can also be fixed to the grip in inverted position.

  • Page 83: Voltage Indication

    Magnefix MD4 4.6.1 Voltage indication Screw the probe onto the grip; if necessary, screw an adapter onto the probe. Bring the probe into contact with the part of the switchgear to be tested. Watch the indicator lamp.  If the indicator lamp lights up, a voltage is present.

  • Page 84: Phase Sequence Indicator

    Magnefix MD4 4.6.3 Phase sequence indicator A phase sequence indicator is available to show phases are in line. For voltage indication a single pole voltage indicator is available, see par. 4.6. The phase sequence indicator comprises two measuring rods, a voltmeter and a set of connecting wires. One of the measuring rods is fitted with a connector into which the voltmeter fits.

  • Page 85: Demonstrate Phases Are In Line

    Magnefix MD4 4.6.4 Demonstrate phases are in line The cast-resin insulated members are marked with the letters A to K for measuring and testing purposes. Measuring points for phase Check that all phases are live Test the phase sequence indicator Connect one test probe to earth.

  • Page 86: Earthing

    Magnefix MD4 4.7 Earthing 4.7.1 Equipment There are two methods for earthing the cables:  Single-pole slow earthing  Three-pole high-speed earthing A bag containing earthing equipment is available for single- pole slow earthing of cable panels. The equipment comprises:...

  • Page 87: Earthing A Cable Using Single-Pole Slow Earthing

    Magnefix MD4 4.7.2 Earthing a cable using single-pole slow earthing ARNING • Do not fit an earthing cap unless it is dead. • If an earthing cap is fitted to a live cast resin insulated member, a short-circuit current may...

  • Page 88: Earthing A Cable Using Three-Pole High-Speed Earthing

    Magnefix MD4 4.7.3 Earthing a cable using three-pole high- speed earthing EMARK • Only earth the installation when the switchgear is isolated. • First of all read the safety instructions in para 4.1.1 on switching the switch caps on and off.
  • Page 89 Magnefix MD4 Push the high-speed earthing equipment into the switch-on equipment holder until it engages in the spring clamp. Push the earthing cap as far as possible into the central opening in the fixed component of the switch equipment, making sure that the protruding part of the switch-on equipment (A) is at the left.

  • Page 90: Removing Three-Pole High-Speed Earthing

    Magnefix MD4 4.7.4 Removing three-pole high-speed earthing Proceed as follows: Turn the grip to the opening position. Pull the earthing cap forcefully from the fixed component. 991.184 G01 03...

  • Page 91: Earthing A Transformer

    Magnefix MD4 4.7.5 Earthing a transformer ARNING When fitting the earthing pins, never put your hand between the red ring on the mounting rod and the earthing pins. Switch off the transformer panel. Remove the fuses. Make sure the switchgear is dead and pay attention to any feedback from the low-voltage side.

  • Page 92: Earthing A Protected Panel

    Magnefix MD4 4.7.6 Earthing a protected panel ARNING • Do not fit an earthing cap unless it is dead. • If an earthing cap is fitted to a live cast resin insulated member, a short-circuit current may cause the earthing cap to jump away, followed by an electric arc extending in the direction of the operator.
  • Page 93 Magnefix MD4 10. Check that the cable to be earthed is dead. 11. Connect the earthing caps to the earthing point of the Magnefix switchgear using the earthing spider or the individual earthing cables. ARNING When fitting the earthing caps, never put your hand between the red ring on the mounting rod and the earthing caps.

  • Page 94: Measuring, Testing And Phase Sequence Testing

    Magnefix MD4 4.8 Measuring, testing and phase sequence testing 4.8.1 Measuring Isolate the installation. Earth the installation. EMARK You can use both the standard earthing caps with separate earthing cables and the earthing caps with extended connection pins and the earthing spider.

  • Page 95: Phase Sequence Testing

    Magnefix MD4 4.8.3 Phase sequence testing In order to carry out phase sequence testing, the cable is to be connected inductively to suitable measuring equipment (e.g. MUCO phase sequence testing unit). EMARK The earthing caps with extended connection pins are used.

  • Page 96: System Commissioning And Decommissioning

    Eaton. The commissioning procedure for your Magnefix  Materials outside the scope of our supply. switchgear is laid down in the Eaton general conditions of 5.1.3 Handover sale or in the sales contract.

  • Page 97: Procedure

    Magnefix switchgear is to be disposed of in an environmentally responsible manner. Substances and materials released are to be destroyed, re- used or disposed of in accordance with the regulations in force at the time. A list of the materials used is available from Eaton. 991.184 G01 03...

  • Page 98: Inspection, Maintenance And Repair Of The System

    6. INSPECTION, MAINTENANCE AND 6.2 Inspection and maintenance, general REPAIR OF THE SYSTEM Magnefix MD4 switchgear and the switches used in them Maintenance described in this chapter may be carried out require little maintenance. However, inspections and by the user’s qualified personnel, with due attention to and checks must be performed and the switchgear cleaned at compliance with guidelines and safety regulations.

  • Page 99: Tools

    6.3.1 Switchgear has been isolated Remove dust and dirt, using a soft hand brush or by Training blowing. Furthermore, Eaton can provide training courses for Persistent dirt can be removed, using MAC 05. Magnefix users' technical staff. Maintenance kit AUTION...

  • Page 100: Inspection And Maintenance Schedule

    Magnefix MD4 6.4 Inspection and maintenance schedule 6.4.2 Periodic check of protected panel Carry out the checks described under Periodic check. Check the switch and interlocks for proper operation. ARNING Check the protection relays in accordance with the Inspections, checks and maintenance operations manufacturer’s instructions.

  • Page 101: Topping Up Grease-Filled Cable Boxes For Paper-Insulated Lead-Covered Cables101

    Magnefix MD4 6.5 Topping up grease-filled cable boxes for paper-insulated lead-covered cables IFE HAZARD • When performing work on the cable box, the relevant cable(s) must always be earthed. • Never work on a live or partly live installation. 1. Check the cable grease level, using a lamp if necessary.

  • Page 102: Fault Diagnosis

    Magnefix MD4 6.6 Fault diagnosis If a fault is found in the system, you can attempt to pinpoint its cause. Contact Eaton Service if you are unable to locate the cause or if you are in doubt. ARNING • If there is any likelihood that correcting the...

  • Page 103: Accessories

    Cable box body up to 150 mm 681.367 Hose clip 32-50 for plastic entry bushing 683.579 Fixing shell (2 off required for plastic 683.397 MAGNEFIX MD4 parts entry bushing) Plastic entry bushing 683.396 Hose clip 40-60 for cable box 683.580 Protection tube (3 off) 685.439...
  • Page 104 Cable clamp (metal): Type F16 (diameter 16 mm) 014.348 Type F28 (diameter: 28 mm) 014.398 Type F30 (diameter: 30 mm) 014.350 MAGNEFIX MD4 parts Type F38 (diameter: 38 mm) 014.351 Type F48 (diameter: 48 mm) 014.352 Type F52 (diameter: 52 mm) 014.359 Type F60 (diameter: 60 mm) 014.353...

  • Page 105: Accessories

    Magnefix MD4 Description and article numbers of parts not shown in illustrations Name Item No. Spacer for wall-mounted frame, para. item 3.4.1 pos. j 682.204 Cable core clamp for paper-insulated lead-covered cable and plastic- insulated cable copper core (3 in number) for 12 mm dia. connecting pin para.

  • Page 106: Glossary

    WORK OPERATIONS MANAGER for safe operation as regards personnel. must ensure that all requirements, rules and  Supplier: instructions are complied with. Eaton or its representative.  Communication  User: Before starting operations, the INSTALLATION The person or body responsible MANAGER must be informed of the intended for operation and maintenance of the switchgear.

  • Page 107: Abnormal Operating Conditions

    Magnefix MD4 8.2 Abnormal 8.3 Equipment and the area surrounding it Operating conditions  Electrical installation  Rated voltage, current, power An assembly of electrical leads and the appliances to The voltage, current and power upon which the design which the leads are connected.

  • Page 108: Appendix

    Magnefix MD4 9. APPENDIX 9.1 Appendix - Electrical Diagram 991.184 G01 03...

  • Page 109: Appendix - Floor Plan

    Magnefix MD4 9.2 Appendix - Floor plan 991.184 G01 03...

Table of Contents

Save PDF