GE M-PACT Operating And Installation Instructions
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GE M-PACT Operating And Installation Instructions

GE M-PACT Operating And Installation Instructions

Air circuit breakers
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'M-PACT'
Air Circuit Breakers
Operating and Installation Instructions

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  • Page 1 ‘M-PACT’ Air Circuit Breakers Operating and Installation Instructions...

  • Page 2: Table Of Contents

    Two-Breaker cable interlock................................... 11 Routine inspection – Fixed or withdrawable ACB (types A, D & H)........................11 Recommended Tool Kit for Maintenance and Modification of M-PACT Air Circuit Breaker ................. 12 M-PACT Trouble Shooting ....................................12 SECTION 2 PROTECTION UNITS ..................................13 M-PRO 17 Protection Unit....................................

  • Page 3: Section 1 Acb

    If further information is required, concerning any aspect of • All electrical supplies to the circuit breaker should be switched operation or maintenance of ‘M-PACT’ circuit breakers, please off. contact: GE Power Controls. • The circuit breaker should be tripped to the OFF position and Tel: 0151 524 1122 the closing springs discharged.

  • Page 4: Installing 'M-Pact' Circuit Breakers

    Remove the breaker from its cassette using procedures ‘M-PACT’ is in the DISCONNECTED position. described in the section ‘Withdrawal of M-PACT Circuit Breaker’. Position the cassette as required in the switchboard.

  • Page 5: Removal Of Circuit Breaker From Cassette

    Insert the torque bar into the torque bar hole and secure it by The breaker is now in the maintenance position. fitting the securing screw as shown in figure 4. Fig. 7 Slide rail handle Slide rail Fig. 4 Securing screw Removal of Circuit Breaker from Using a screwdriver, rotate the racking handle shutter drive, cassette...

  • Page 6: Mounting Circuit Breaker Into Cassette

    Circuit breaker removal can be made easier by using a When approaching the CONNECTED position, effort to turn specifically designed lifting truck (Fig. 11). Contact the nearest the racking handle will increase as the clusters on the breaker sales office for availability. engage with the cassette mounted fixed contacts.

  • Page 7: M-Pact' Ancillary Equipment - Fitting Instructions

    ‘M-PACT’ ancillary equipment - Fitting instructions Motorised spring charging unit Ensure circuit breaker is open with springs discharged. For DC motors, fix motor filter in position shown (if supplied, Fig. 16) using the two fixing screws to a torque of 5Nm.

  • Page 8: Pushbutton Padlocking

    Fig. 22 Fig. 25 Locking bar Then secure the capacitor unit with 2 off M5 screws (screw Safety shutters length 10mm max. torque to 7Nm) and lock washers to the tapped holes in the mechanism side plate (Figs 22 & 23). Security padlocking Ensure the circuit breaker is DISCONNECTED and the racking handle removed.

  • Page 9: Installing Carriage Switch

    Installing Carriage Switch Fit carriage switch terminal block assembly to the left-hand side of the cassette (Fig. 28), using the fasteners supplied, to a torque of 5Nm. Stick the designator label next to terminal block assembly (Note: Two terminal locations are unused). Fig.

  • Page 10: To Fit Door Interlock

    Door bracket location detail below (Fig. 38) is for right hand To fit Door Interlock hinged switch board doors. Drill two holes in the door for M5 clearance. A door interlock mechanism may be fitted inside the cassette on the right for L/H hinged door or left for R/H hinged door. Specify whether door is L/H or R/H hinged when ordering.

  • Page 11: To Fit Mechanical Trip Alarm

    44) and tie wrap them to the side of M-PRO. Replace facia. Fig. 47 Recommended configurations are provided with the mis- insertion device for the entire M-PACT range. Fig. 44 Mechanical Operations Counter The optional pack contains an operations counter with fixing screws.

  • Page 12: Two-Breaker Cable Interlock

    Replace as necessary. ‘A’ cm Bottom ACB Note: Arc chutes on ‘M-PACT’ circuit breakers have a unique design feature. They are reversible to extend useful life. Reversal of the arc chutes during each routine inspection is recommended.

  • Page 13: Recommended Tool Kit For Maintenance And Modification Of M-Pact Air Circuit Breaker

    Recommended Tool Kit for Maintenance and Modification of M-PACT Air Circuit Breaker Cluster Pliers Used for removal of primary isolating contacts during inspection and maintenance (Part number LLA11YY207). Flat Bladed Screwdriver - 8 mm Used for removal of front panel fixing screws and operation of racking shutter drive.

  • Page 14: Section 2 Protection Units

    SECTION 2 PROTECTION UNITS M-PRO 17 Protection Unit Front Panel Protection Healthy LED switches A green ‘healthy indicator’ is continuously flashing at the pace of a ‘heart beat’ when the M-PRO is powered and the Protection operation status is normal. switches (earth fault Reset button...

  • Page 15: Protection Features

    Earth Fault Protection (OPTIONAL) Protection Features Earth fault current is measured by summing the current in all phases and neutral (where used) to give a value equal to the Long Time Protection earth leakage current which is present downstream of the Long time protection is provided in accordance to the IEC 947- circuit breaker.
  • Page 16 M-PRO 17 EARTH LEAKAGE PROTECTION (UEF) 1000 Earth Fault pickup, If 0.6 0.8 1.0 Min/max settings show n in BOLD Trip delay settings Inst 0.01 0.01 1000 CURRENT IN MULTIPLES OF In...

  • Page 17: Operator Controls

    Earth Fault Pickup (If) - OPTIONAL Operator Controls This is the pick-up current for earth fault protection. It is set as a fraction of the breakers rating (Ir). Switch positions are provided at OFF, 0.4In, 0.6In, 0.8In and All operator controls are presented on the M-PRO 17 1.0In.

  • Page 18: M-Pro 20, 30 & 40 Protection Units

    M-PRO 20, 30 & 40 Protection Units Front Panel Liquid crystal display (LCD) A two-line LCD screen displays menus, 2 line LCD display curve settings and circuit status data, as selected using the keypad. Warn Alarm LED ‘Healthy’ LED green continuously Healthy LED whenever M-PRO is energised and the...

  • Page 19: Navigation Table

    Navigation table LEVEL 1 LEVEL 2 LEVEL 3 LEVEL 4 Select Select Select Sele Option: Protection Option: Curve Option: Iset Option: 41% In Modified/Stored Escap Escap Escap Sele Option: Ammeters Option: Earth Option: Overload Option: 40% In Modified/Stored Sele Option: Load Option: Input Settings Option: Cooling Option: 100% In...

  • Page 20: Menu Structure

    Menu Structure There are four levels within the M-PRO menu structure, the main three are described below. Only those menus specified at the time of ordering will be factory set into M-PRO hence not all of the following menus will be available. Level 1 Menu Level 2 Menu Level 3 Menu...

  • Page 21: Pamm - A Unique Security Feature

    PAMM - A unique security feature Inverse Short Circuit Current The Plant Associated Memory Module (PAMM), being Time mounted on the cassette (for withdrawable units) is independent of the withdrawable circuit breaker and M-PRO unit. All stored settings and data will be retained even when power is removed from the M-PRO unit.
  • Page 22 MCR/HSISC Time Current Fixed Making Current Release (MCR) High Instantaneous Short Circuit Protection (HSISC) are factory pre-set relative to the capacity of the circuit breaker to which the M-PRO is fitted. M-PRO 20/30/40 MOTOR PROTECTION Long Time Protection 10000 Ir = 0.4 to 1.0 x In Min/max settings show n in BOLD 1000...
  • Page 23 M-PRO 20/30/40 STANDARD INVERSE Long Time Protection 1000 Ir = 0.4 to 1.0 x In Min/max settings show n in BOLD LT curve 16 Note: ITSC curve is alw ays 10 X the set LT curve ITSC curve 16 LT curve 1 Inst 1.5 In 12 In...
  • Page 24 M-PRO 20/30/40 EXTREMELY INVERSE Long Time Protection 10000 Ir = 0.4 to 1.0 x In Min/max settings show n in BOLD 1000 LT curve 16 Note: ITSC curve is alw ays 10 X the set LT curve ITSC curve 16 LT curve 1 Inst ITSC curve 1...
  • Page 25 Earth Fault Protection Earth Fault Trip Time Delay Earth fault protection is available on M-PRO 30 and M-PRO 40 trip units. Any combination of unrestricted earth fault (UEF), Time restricted earth fault (REF) and standby earthfault (SEF) may be specified for factory configuration. Measurement is achieved by neutral Rogowski coil (mounted internally or externally) and/or earth leg CT.
  • Page 26 M-PRO 30/40 EARTH LEAKAGE Protection (UEF & SEF) 1000 Pickup, If adjustable from 0.1 to 1 x In (0.1 steps show n) Earth Fault Cropping, Cr adjustable from 1.5 to 6 Trip delay, Tf T = Tf x Cr x (If / I) adjustable from instantaneous to 1s Inst...
  • Page 27 Thermal Memory An auxiliary power supply is required for correct operation of the digital outputs as all the outputs will be opened when the This is the cooling time constant which is user selectable. It M-PRO powers down. provides a direct relationship to the thermal content which will The outputs are updated every 100ms.

  • Page 28: Operating M-Pro 20/30/40

    Operating M-PRO 20/30/40 When M-PRO is first energised: The green ‘Healthy’ LED will light indicating that (a) power is present, (b) The unit is functioning normally. This will remain lit at all times when M-PRO is energised unless a fault is present. Refer to M-PRO menu structure when the instructions below are carried out. If the Ammeters option has been specified, the LCD screen will display the RMS Blue phase currents.
  • Page 29 S/C Curve = C03, 69ms @ 6Iset Fixed S/C Crnt 8xI_SET 3200A Fixed S/C Time = 1.0s At this stage, select the appropriate setting (Note, the presently stored setting has an equals sign before it. Upon selection, this changes as illustrated): Press and the M-PRO will display Select...

  • Page 30: M-Pro Test Box

    M-PRO Test Box After allowing sufficient time for the test to run the ACB should trip. The M-PRO test box may be used as a means of powering up We can check if the test is running correctly by viewing the thermal an M-PRO, simulating faults by secondary and tertiary register and highest phase entry on those ACB’s configured with injection or for performing a forced trip of the breaker.

  • Page 31: Neutral Rogowski Coil Mounting Details

    The mounting bracket has been designed to fit a number of Neutral Earth Leg standard neutral bar arrangements. Rogowski Frame 1 M-PACT ACB’s are provided with frame 1 external A8 (+) Not Available neutral Rogowski coils. Likewise fame 2 M-PACT ACB’s are M-PRO 17 provided with frame 2 external Rogowski coils.
  • Page 32 Frame 1 neutral Rogowki coil Frame 2 neutral Rogowki coil will clamp on to copper sizes: will clamp on to copper sizes: 40mm x 4 – 25mm 40mm x 4 – 25mm 50mm x 4 – 25mm 50mm x 4 – 25mm 60mm x 4 –...

  • Page 33: M-Pro Optional Accessories

    24V and 264V AC or DC. M-PRO 17 test box The recommended backup protection is a GE Power Controls HRC fuse link Type NIT4 with Type RS20 fuse holder. For more detailed installation and electrical specification refer to APP034 available from GE Power controls.

  • Page 34: Section 3 M-Pact Wiring Diagram

    SECTION 3 M-PACT Wiring Diagram emer- gency switch switch Customer Supplied External Wiring (example) Optional Factory Internal Wiring Terminal References B1 to B16 Automatic disconnect L.T. Blocks Disconnected indication Closing coil ACB ON indication C1 to C16 Automatic disconnect L.T. Blocks...

  • Page 35: Connections For M-Pro 40

    Connections for M-PRO 40 Location Terminal Function PAMM OUTPUT 4, normally open volt free contact: Operates when the REF (or SEF) element trips PAMM the ACB. This is used to trip an upstream HV breaker. PAMM OUTPUT 3, normally open volt free contact: Used to control shunt trip to open the ACB via serial link.

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