MicroLogic™ 5.0P and 6.0P Electronic Trip Units – Instruction Bulletin PDF
48049-137-06EN

Trip Unit Configuration

Trip Unit Parameters Adjustment

NOTE: The protection menu settings cannot be adjusted unless the switch cover is open. When settings have been adjusted, press one of the menus buttons to save the new values.

  1. Open switch cover (A).

  2. Press maintenance button (B) to bring up maintenance menu (C).

Maintenance Menu

M2C/M6C Programmable Contacts

If M2C or M6C contact kit is installed, use “Contacts M2C/M6C” menu to set alarm type and operational mode. The M2C kit has S1 and S2 contacts. The M6C kit has S1, S2, S3, S4, S5 and S6 contacts.

M2C/M6C Contact Kits Setup

   

Set M2C/M6C Contact Alarm Type
1. Enter M2C/M6C contacts alarm type into trip unit memory. Available alarms are:

Ir Long-time pickup
Ii Instantaneous pickup
Isd Short-time pickup
Ground-fault current
Ground-fault alarm
Iunbal Current unbalanced
Iamax Phase A demand overcurrent
Ibmax Phase B demand overcurrent
Icmax Phase C demand overcurrent
Inmax Neutral demand overcurrent
Vmin Voltage is below set minimum
Vmax Voltage is above set maximum
Vunbal Voltage unbalanced
rPmax Reversed power
Fmin Frequency is below set minimum
Fmax Frequency is above set maximum
ΦF rot Phase rotation
Ished Current shedding
Pshed Power shedding
Not Selected No alarms selected

2. Set up M2C/M6C contact alarm mode. Contact modes available are:

  • Latching contact—Stays latched until reset

  • Nonlatching contact—Drops out after fault is removed.

  • Time Delay—Delay placed on contacts

For troubleshooting purposes only the following modes are available:

  • Locked 0—Contacts are locked open

  • Locked 1—Contacts are locked closed

For short-time, instantaneous and ground fault (SIG) alarms only:

  • Each alarm occurrence will activate the relay and will signal and continue to signal an alarm until the trip unit test/reset button is pressed.

  • This “latching behavior occurs regardless of whether “latching” or “nonlatching” contact mode was used during alarm setup.

Set M2C/M6C Contact Alarm Mode
3.

Reset displays states of relays and allows them to be reset.

NOTE: Select reset option under the M2C/M6C menu to reset all alarms. The test/reset button on the trip unit will reset the trip unit so that it will stop activating the alarm, but does not reset the M2C/M6C contact.

MicroLogic Trip Unit Setup

Use “MicroLogic setup” menu to set display language, date and time, circuit breaker information, power sign, VT ratio and system frequency.

MicroLogic Trip Unit Setup

     

Set Language
1.

Set display language.
     

Set Date and Time
2.

Set trip unit date and time.

NOTE: If trip unit is connected to a communication network which provides date and time synchronization, date/time cannot be set from trip unit. If trip unit is not connected to a communication network which provides data and time synchronization, date and time will need to be re-entered every time trip unit power is lost.)
NOTE: In US English the date format is month/day/year. In all other languages the date format is day/month/year.

After using the test kit to do secondary injection testing, thermal imaging inhibit, ZSI testing or ground-fault inhibit, the time will need to be reset if the trip unit is not connected to a communication network providing date and time synchronization.

NOTE: If time is not synchronized by a supervisor using the network system management software, reset time semi-annually, or more often if needed.
   
WARNING
Potential compromise of system availability, integrity, and confidentiality
Change default passwords at first use to help prevent unauthorized access to device settings, controls and information.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
 
3.

Enter circuit breaker information into trip unit memory. The following information must be entered to properly identify the circuit breaker over the communication network:

Standard—ANSI, UL, IEC or IEC/GB

Circuit Breaker Family—MasterPacT (ANSI, UL, IEC or IEC/GB), PowerPacT (UL or IEC) or ComPacT NS (IEC)

Circuit Breaker Type—Found on the circuit breaker faceplate

Circuit Breaker Contact Wear Code–Only modified when replacing an existing trip unit with contact wear information

NOTE: The contact wear meter is active only when circuit breaker type is MasterPacT.

To maintain contact wear indicator information when replacing an existing trip unit:

Set Circuit Breaker Information
  a. Read code on trip unit to be replaced. (The code is a hexadecimal number.)
  b. Remove old trip unit and install new trip unit in circuit breaker.
  c. Enter code from old trip unit in new trip unit.
4.

Select power sign.

Choose the signing convention to be used for power metering, energy metering and load shedding:

  • P+: Power absorbed from upstream to downstream (top fed)

  • P-: Power absorbed from downstream to upstream (bottom fed)

Default value is P+

Set Power Sign
5.

Enter VT ratio of external voltage transformer into trip unit memory. If no external voltage transformer is present, set both primary value and secondary value to 690 V.

If supply voltage for the trip unit exceeds 690 V, an external voltage transformer is required.

Set VT Ratio
6.

Enter system frequency into trip unit memory.

NOTE: When system frequency is set to 400 Hz:

  • Reactive power absolute value will be correct, but sign will be wrong.

  • PF absolute value will be correct, but sign will be wrong.

  • Frequency value may not be accurate.

  • Frequency protection is disabled.

  • Phase rotation protection is disabled.

Set System Frequency

Metering Setup

Use “Metering setup” menu to set parameters for metering system current and power.

Metering Setup

  1. Select system type.

    Three measurement options are available:

    Network Type Neutral Phase Current
    3-phase, 3-wire, 3 CT (Uses 2 wattmeters) No Ia, Ib and Ic measured
    3-phase, 4-wire, 4 CT* (Uses 3 wattmeters) Yes Ia, Ib, Ic and In measured
    3-phase, 4-wire, 3 CT (Uses 3 wattmeters) No Ia, Ib and Ic measured
    NOTE: In the case of a four-pole circuit breaker, the ability to set the neutral is limited by the setting of the neutral type switch on the circuit breaker.

    In measurement is not available for “3-phase, 4-wire, 3 CT” network types and Van, Vbn and Vcn simple voltage measurements are not available for “3-phase, 3-wire, 3 CT” network types.

    If these measurements are desired, and if the connected system is a wye (4-wire) system, select “3-phase, 4-wire, 4 CT’ and connect to neutral (Vn) voltage terminal on the neutral CT.

    Set System Type

2.

Set current calculation method and interval.

The calculation method can be block interval or thermal calculation.

The window type is factory set as a sliding window.

The time interval can be set from five to 60 minutes in one minute increments.

Set Current Demand
3.

Set power calculation method and interval.

The calculation method can be block interval, thermal calculation or sync. to comms.

NOTE: The sync to comms method is available only with the communication option. This function determines demand power based on a signal from the communication module.

The default window type is sliding.

The time interval can be set from five to 60 minutes in one minute increments.

Set Power Demand
4.

Select sign convention.

Choose the signing convention to be used for reactive power (VARS) and reactive energy (VARhrs) and power factor measurements:

IEEE

IEC

IEEE alt

Set Sign Convention

Communication Module Setup

Use “Com. setup” menu to set communication module setup.

NOTE: Com. setup parameters can only be entered if a circuit breaker communication module (BCM) is installed.

Communication Module Setup

1.

Set communication parameters. Default values are:

Address = 47

Baud-rate = 19.2k

Parity = even

Set Modbus Com Values

WARNING
Potential compromise of system availability, integrity, and confidentiality
Change default passwords at first use to help prevent unauthorized access to device settings, controls and information.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
2.

Remote access.

Remote access is factory set and does not require adjustment.

NOTE: Remote access setting can be changed to allow protection settings to be changed via the communication network. Contact the local sales office about the availability of software to utilize this feature.

Check Remote Access
3.

Set remote control.

Manual: The circuit breaker cannot be opened or closed via the network system management software.

Auto: The circuit breaker can be opened or closed via the network system management software.

NOTE: For remote operation of the circuit breaker, the BCM must be set to enable opening and/or closing and circuit breaker must have communicating shunt coils with wire harness installed.

Set Remote Control

Switch Settings Adjustment

NOTICE
HAZARD OF Equipment damage
  • Using the switches to set trip unit values will override settings made using the keypad.
  • Changing the switch setting for overload, short-time or instantaneous, or changing the neutral protection selector on a four-pole circuit breaker, will delete all fine adjustments previously made using the keypad for overload, short-time and instantaneous protection.
  • Changing the switch setting for ground-fault will delete all fine adjustments made with the keypad for ground-fault protection.
  • If cover pin located on back of the protective cover is missing, contact sales office for a replacement cover.
Failure to follow these instructions can result in equipment damage.

  1. Open switch cover (A).

  2. Confirm that cover pin (B) is on back of the protective cover. This pin is necessary to lock trip unit settings when they are set to trip.

  3. Adjust the appropriate switches (C) to desired values. Display screen (D) automatically shows appropriate setting curve (E). The set value is displayed as a boxed value in amperes or seconds.

  4. Make fine adjustments using navigation keys (F) or network system management software. All fine adjustments are stored in non-volatile memory.

    NOTE: Fine adjustments can only be made for values less than those set with the switches. Using switches to set values after making fine adjustments using the keypad will override the keypad adjustments.

    Fine switch settings are in the following increments:

    Long-time pickup = 1 A

    Long-time delay = 0.5 sec.

    Short-time pickup = 10 A

    Short-time delay = 0.1 sec.

    Instantaneous pickup = 10 A

    Ground-fault pickup = 1 A

    Ground-fault delay = 0.1 sec.

    Adjust Switch Settings

  5. Replace switch cover. Use a lead seal (A), not supplied, to provide tamper evidence if necessary.

    NOTE: When the cover is closed, the navigation keys can no longer be used to make adjustments to the trip unit settings if they are set to trip.

  6. Check settings using keypad (B) and graphic display or the network system management software.

    Check Switch Settings

Examples

MicroLogic 5.0P Trip Unit

  1. Set switches:

    A—Long-time pickup (Ir)

    B—Long-time delay (tr)

    C—Short-time pickup (Isd)

    D—Short-time delay (tsd)

    E—Instantaneous pickup (Ii)

  2. Fine-tune adjust using keypad and graphic display screen or the network system management software.

    Set Pickup Levels

MicroLogic 6.0P Trip Unit

  1. Set switches:

    A—Long-time pickup (Ir)

    B—Long-time delay (tr)

    C—Short-time pickup (Isd)

    D—Short-time delay (tsd)

    E—Instantaneous pickup (Ii)

    F—Ground-fault pickup (Ig)

    G—Ground-fault delay (tg)

  2. Fine-tune adjust using keypad and graphic display screen or the network system management software.

    Set Pickup Levels

Zone-Selective Interlocking (ZSI)

The number of devices which can be interlocked are shown in .

ZSI Combinations

Downstream Device (sends output to RIM) Upstream Device (receives input from RIM) →
MicroLogic #.0x Trip Units Square D MicroLogic Series B Trip Units Square D
GC-100 Ground-Fault Relay for Equipment Protection		 Square D
GC-200 Ground-Fault Relay for Equipment Protection		 Merlin Gerin STR58 Trip Units Federal Pioneer USRC and USRCM Trip Units
MicroLogic #.0x Trip Units 15 R R 15 15 R
Square D MicroLogic Series B Trip Units R 26 R R R 15
Square D GC-100 Ground-Fault Relay for Equipment Protection R R 7 R R R
Square D GC-200 Ground-Fault Relay for Equipment Protection 15 R R 15 15 R
Merlin Gerin STR58 Trip Units 15 R R 15 15 R
Merlin Gerin STR53 Trip Units 15 R R 15 15 R
Federal Pioneer USRC and USRCM Trip Units R 15 R R R 15
Square D Add-On Ground Fault Module for Equipment Protection R 5 R R R R

Jumpered Terminals

Wire circuit breakers for zone-selective interlocking.

Circuit breaker terminals are shipped with terminals Z3, Z4 and Z5 jumpered to self-restrain the short-time and ground-fault functions. Remove the jumpers when activating zone-selective interlocking.

NOTE: Use I2t off with ZSI for proper coordination. Using I2t on with ZSI is not recommended as the delay in the upstream device receiving a restraint signal could result in the trip unit tripping in a time shorter than the published trip curve.

ZSI Wiring Example

Trip Unit Operation Verification

Use a test kit connected to the trip unit test plug receptacle (A) to verify trip unit is functioning as desired. See instructions shipped with test kit to perform verification tests.

NOTE: To verify operation of the circuit breaker and trip unit, use primary injection testing. (See Trip Unit Installation Check for more information.)

Verify Trip Unit Operation

Trip Unit Resetting

Reset Trip Unit

When the circuit breaker trips, the fault indicator will remain lit until the trip unit is reset.

Do not return circuit breaker to service until cause of trip is determined. For more information, refer to the circuit breaker installation instructions shipped with the circuit breaker.

Press the reset/test button (A) to reset the trip unit after trip.

Equipment Ground-Fault Trip Functions Testing

Test Equipment Ground-Fault Trip Function

Paragraph 230-95 (c) of the National Electrical Code requires that all equipment ground-fault protection systems be tested when first installed.

With the trip unit powered and the circuit breaker closed, test the equipment ground-fault (MicroLogic 6.0P trip unit) trip function.

The trip unit is powered if:

  • circuit breaker is on and has more than 150 V of load voltage on two phases (circuit breaker is closed or bottom fed).

  • the test kit is connected and on.

  • the 24 Vdc external power supply is connected.

  • an external voltage tap is installed and voltage of more than 150 V is present on two phases.

For instructions on how to close circuit breaker, refer to the circuit breaker installation instructions shipped with the circuit breaker.

To test trip function, press the ground-fault test button (A). Circuit breaker should trip.

If circuit breaker does not trip, contact the local field office.

Trip Unit Status Check

Check trip unit battery and trip indicators.

  1. Make sure trip unit is powered. The trip unit is powered if:

    • circuit breaker is on and has more than 150 V of load voltage on two phases (circuit breaker is closed or bottom fed).

    • the test kit is connected and on.

    • the 24 Vdc external power supply is connected.

    • the external voltage tap is installed and voltage of more than 150 V is present on two phases.

  2. Press test/reset button (A).

    • All trip indicators (B) will light up

    • Battery status will be displayed

    • The battery bar graph reading is valid after the reset button has been released

    Check Trip Unit Status

  3. If the battery bar graph shows the battery needs to be changed, use Square D battery catalog number S33593:

    • lithium battery

    • 1.2AA, 3.6 V, 800 ma/h

For instructions on replacing battery, see Battery Replacement.

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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