0613CT0001

Trip Curves

MicroLogic 6.0 A/P/H Trip Units

MicroLogic 6.0 A/P/H Trip Units: In ≤ 400 A

   
  MicroLogic 6.0 A/P/H Trip Units
with Adjustable Ground-Fault
Pickup and Delay
Characteristic Trip Curve No. 613-1

Ground Fault I2t OFF and ON

In 400 A
   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.
   

MicroLogic 6.0 A/P/H Trip Units:
400 A < In ≤ 1200 A

   
  MicroLogic 6.0 A/P/H Trip Units
with Adjustable Ground-Fault
Pickup and Delay
Characteristic Trip Curve No. 613-2

Ground Fault I2t OFF and ON

400 A < In 1200 A
   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.
   

MicroLogic 6.0 A/P/H Trip Units:
In > 1200 A

   
  MicroLogic 6.0 A/P/H Trip Units
with Adjustable Ground-Fault
Pickup and Delay
Characteristic Trip Curve No. 613-3

Ground Fault I2t OFF and ON

In > 1200 A
   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.
   

MicroLogic 5.0/6.0 A/P/H Trip Unit

MicroLogic 5.0/6.0 A/P/H Trip Units: Long-Time Pickup and Delay, Short-Time Pickup, and I2t OFF Delay

  MicroLogic 5.0/6.0 A/P/H Trip Units
Characteristic Trip Curve No. 613-4

Long-Time Pickup and Delay
Short-Time Pickup and I2t OFF Delay
   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.

NOTE:
  1. There is a thermal-imaging effect that can act to shorten the long-time delay. The thermal-imaging effect comes into play if a current above the long-time delay pickup value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself. A subsequent overload will cause the circuit breaker to trip in a shorter time than normal. The amount of time delay reduction is inverse to the amount of time that has elapsed since the previous overload. Approximately twenty minutes is required between overloads to completely reset thermal-imaging.

  2. The end of the curve is determined by the interrupting rating of the circuit breaker.

  3. With zone-selective interlocking ON, short-time delay utilized, and no restraining signal, the maximum unrestrained short-time delay time band applies regardless of the setting.

  4. Total clearing times shown include the response times of the trip unit, the circuit breaker opening, and the extinction of the current.

  5. For a withstand circuit breaker, instantaneous can be turned OFF. See trip curve 613-7 for instantaneous trip curve. See trip curve 613-10 for instantaneous override values.

  6. Overload indicator illuminates at 100%.

   

MicroLogic 5.0/6.0 A/P/H Trip Units: Short-Time Pickup and I2t ON Delay

  MicroLogic 5.0/6.0 A/P/H Trip Units
Characteristic Trip Curve No. 613-5

Short-Time Pickup and I2t ON Delay
   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.

NOTE:
  1. There is a thermal-imaging effect that can act to shorten the long-time delay. The thermal-imaging effect comes into play if a current above the long-time delay pickup value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself. A subsequent overload will cause the circuit breaker to trip in a shorter time than normal. The amount of time delay reduction is inverse to the amount of time that has elapsed since the previous overload. Approximately twenty minutes is required between overloads to completely reset thermal-imaging.

  2. The end of the curve is determined by the interrupting rating of the circuit breaker.

  3. With zone-selective interlocking ON, short-time delay utilized, and no restraining signal, the maximum unrestrained short-time delay time band applies regardless of the setting.

  4. Total clearing times shown include the response times of the trip unit, the circuit breaker opening, and the extinction of current.

  5. For withstand circuit breaker, instantaneous can be turned OFF. See trip curve 613-7 for instantaneous trip curve. See trip curve 613-10 for instantaneous override values.

  6. See trip curve 613-4 for long-time pickup and delay trip curve.

   

MicroLogic 5.0/6.0 Trip Units: Instantaneous Pickup, 2x to 15x and OFF

  MicroLogic 5.0/6.0 A/P/H Trip Units
Characteristic Trip Curve No. 613-7

Instantaneous Pickup

2x–15x and OFF

   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.

NOTE:
  1. The end of the curve is determined by the interrupting rating of the circuit breaker.

  2. Total clearing times shown include the response times of the trip unit, the circuit breaker opening, and the extinction of current.

  3. The instantaneous region of the trip curve shows maximum total clearing times. Actual clearing times in this region can vary depending on the circuit breaker mechanism design and other factors. The actual clearing time can be considerably faster than indicated. Contact your local Sales Office for additional information.

  4. For withstand circuit breaker, instantaneous can be turned OFF. See trip curve 613-10 for instantaneous override values.

  5. See trip curve 613-4 and 613-5 for long-time pickup, long-time delay, short-time pickup, and short-time delay trip curve.

   

MicroLogic 3.0 Trip Units

MicroLogic 3.0A Trip Unit: Long-Time Pickup and Delay

  MicroLogic 3.0 Trip Unit
Characteristic Trip Curve No. 613-6

Long-Time Pickup and Delay

   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -30°C to +60°C
(-22°F to +140°F) ambient temperature.

NOTE:
  1. There is a thermal-imaging effect that can act to shorten the long-time delay. The thermal-imaging effect comes into play if a current above the long-time delay pickup value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself. A subsequent overload will cause the circuit breaker to trip in a shorter time than normal. The amount of time delay reduction is inverse to the amount of time that has elapsed since the previous overload. Approximately twenty minutes is required between overloads to completely reset thermal-imaging.

  2. The end of the curve is determined by the instantaneous setting of the circuit breaker.

  3. Total clearing times shown include the response times of the trip unit, the circuit breaker opening, and the extinction of current.

  4. See trip curve 613-8 for instantaneous pickup trip curve.

   

MicroLogic 3.0A Trip Unit: Instantaneous Pickup, 1.5X to 12X

  MicroLogic 3.0 Trip Units
Characteristic Trip Curve No. 613-8

Instantaneous Pickup

1.5x–12x

   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.

Instantaneous override values are given on 613-10.

NOTE:
  1. The end of the curve is determined by the interrupting rating of the circuit breaker.

  2. Total clearing times shown include the response times of the trip unit, the circuit breaker opening, and the extinction of current.

  3. The instantaneous region of the trip curve shows maximum total clearing times. Actual clearing times in this region can vary depending on the circuit breaker mechanism design and other factors. The actual clearing time can be considerably faster than indicated. Contact your local Sales Office for additional information.

  4. See trip curve 613-6 for long-time pickup delay trip curve.

   

MicroLogic 2.0A Trip Unit

MicroLogic 2.0A Trip Unit

  MicroLogic 2.0 A Trip Unit
Characteristic Trip Curve No. 613-9

Long-Time Pickup and Delay
Short-Time Pickup with No Delay
   
  The time-current curve information is to be used for application and coordination purposes only.

Curves apply from -25°C to +70°C
(-13°F to +158°F) ambient temperature.

NOTE:
  1. There is a thermal-imaging effect that can act to shorten the long-time delay. The thermal-imaging effect comes into play if a current above the long-time delay pickup value exists for a time and then is cleared by the tripping of a downstream device or the circuit breaker itself. A subsequent overload will cause the circuit breaker to trip in a shorter time than normal. The amount of time delay reduction is inverse to the amount of time that has elapsed since the previous overload. Approximately twenty minutes is required between overloads to completely reset thermal-imaging.

  2. The end of the curve is determined by the short-time setting.

  3. Total clearing times shown include the response times of the trip unit, the circuit breaker opening, and the extinction of current.

  4. Overload indicator illuminates at 100%.

   

MicroLogic 2.0/3.0/5.0/6.0 A/P/H Trip Unit Instantaneous Override Values

Instantaneous Override Values No. 613.10

MasterPact NW/NT Low Arc Flash Circuit Breakers

MasterPact NW Low Arc Flash Circuit Breaker: L1F and LF

MasterPact NT Low Arc Flash Circuit Breaker: L1F and LF

QR code for this page

Was this helpful?