Siemens Argus 7SR21 Technical Manual page 573

Overcurrent relay

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2.12 Sensitive Power (32S)

Voltage Inputs:

Current Inputs:

Map Pickup LED:

This function can be tested by application 1P current and 3P voltage. For Over-power, the elements with the

highest setting should be tested first and for Under-power the elements with the lowest settings should be tested

first. The elements with other settings can then be tested without need to disable the elements already tested.

From the nominal power setting Sn gradually increase/decrease applied voltage or current until 32S-n operation

If the 32S-n Delay setting is long it will be advantageous to map the function to temporarily drive the relevant

Pickup output in the Output Config > Pickup Config menu. This will allow the Pick-up led to operate for the

function. If the delay setting is short the operation of the element can be easily checked directly.

The current or voltage should then be decreased/increased until the element resets.

If the element is set as 32S-n U/C Guarded, The applied current must be above the 32S U/C Guard Setting.

Apply setting power +10% for Over-power or -10% for Under-power and record operating time.

NOTE: The use of some

functions are mutually exclusive

Figure 2.12-1

32S-n - Self Reset

7SR210 & 7SR220 Commissioning & Maintenance Guide

Sensitive Power

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