Basler DGC-500 - Page 83

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3 Phase – 51 Pickup. This setting selects the overcurrent pickup threshold for three-phase generator

connections. A 51 Pickup setting of 0.18 to 1.18 Aac (style X1X1) or 0.9 to 7.75 Aac (style X5X1) may be

entered.

3 Phase – 51 Time Dial. When three-phase generator connections are used, this setting selects the time

delay from when an overcurrent condition is detected and an overcurrent annunciation (trip) occurs. The

51 Time Dial setting operates in conjunction with the 51 Curve setting. When the F, Fixed Time curve

setting is selected, the 51 Time Dial setting is adjustable from 0 to 30 seconds and determines the

overcurrent time delay with no regard to the generator current level. When one of the 16 inverse curve

settings are selected, the 51 Time Dial setting (adjustable from a multiplier of 0 to 9.9) along with the level

of measured generator current determines the overcurrent time delay.

3 Phase –51 Curve. When three-phase generator connections are used, the 51 Curve setting operates in

conjunction with the 51 Time Dial setting. Selecting a 51 Curve setting of F, Fixed Time causes the 51

Time Dial setting to determine the overcurrent time delay with no regard to the generator current level.

When one of the 16 inverse curve settings are selected, the 51 Time Dial setting, along with the level of

the measured generator current, determines the overcurrent time delay. The overcurrent curve setting

selections are listed below.

• A, Standard Inverse

• B, Very Inverse

• C, Extremely Inverse

• D, Definite

• E1, Extremely Inverse

• E2, Extremely Inverse

• F, Fixed Time

• G, Long Inverse

• I1, Inverse

• I2, Inverse

• L1, Long Inverse

• L2, Long Inverse

• M, Moderately Inverse

• S1, Short Inverse

• S2, Short Inverse

• V1, Very Inverse

• V2, Very Inverse

3 Phase – 51 Alarm Configuration. This setting selects how a three-phase overcurrent condition is

annunciated. An overcurrent condition can be configured to trigger a pre-alarm, alarm, or no annunciation.

Single Phase – 51 Pickup. This setting selects the overcurrent pickup threshold for single-phase

generator connections. A 51 Pickup setting of 0.18 to 1.18 Aac (style X1X1) or 0.9 to 7.75 Aac (style

X5X1) may be entered.

Single Phase – 51 Time Dial. When single-phase generator connections are used, this setting selects the

time delay from when an overcurrent condition is detected and an overcurrent annunciation (trip) occurs.

The 51 Time Dial setting operates in conjunction with the 51 Curve setting. When the F, Fixed Time curve

setting is selected, the 51 Time Dial setting is adjustable from 0 to 30 seconds and determines the

overcurrent time delay with no regard to the generator current level. When one of the 16 inverse curve

settings are selected, the 51 Time Dial setting (adjustable from a multiplier of 0 to 9.9) along with the level

of measured generator current determines the overcurrent time delay.

Single Phase – 51 Curve. When single-phase generator connections are used, the 51 Curve setting

operates in conjunction with the 51 Time Dial setting. Selecting a 51 Curve setting of F, Fixed Time

causes the 51 Time Dial setting to determine the overcurrent time delay with no regard to the generator

current level. When one of the 16 inverse curve settings are selected, the 51 Time Dial setting, along with

the level of the measured generator current, determines the overcurrent time delay. The overcurrent

curve setting selections are listed below.