5-234 C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS CHAPTER 5: SETTINGS
5
5.7.8 Voltage elements
5.7.8.1 Menu
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS
These protection elements can be used for a variety of applications, such as
• Undervoltage protection — For voltage sensitive loads, such as induction motors, a drop in voltage increases the
drawn current, which can cause dangerous overheating in the motor. The undervoltage protection feature can be
used to either cause a trip or generate an alarm when the voltage drops below a specified voltage setting for a
specified time delay.
VOLTAGE ELEMENTS
PHASE
UNDERVOLTAGE1
See below
PHASE
UNDERVOLTAGE3
PHASE
OVERVOLTAGE1
See page 5-236
PHASE
OVERVOLTAGE3
NEUTRAL OV1
See page 5-237
NEUTRAL OV3
NEG SEQ OV1
See page 5-238
NEG SEQ OV3
AUXILIARY OV1
See page 5-239
AUXILIARY OV3
VOLTAGE
DIFFERENTIAL 1
See page 5-240
VOLTAGE
DIFFERENTIAL 3
BANK
OVERVOLTAGE
See page 5-243
NEUTRAL VOLTAGE
UNBALANCE 1
See page 5-247
NEUTRAL VOLTAGE
UNBALANCE 3