GE MI-869 - Page 351

CHAPTER 4: SETPOINTS PROTECTION
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–233
Figure 4-83: Volts per Hertz logic diagram
894010$ 1.cdr
Volts/Hz 1 PKP
FLEXLOGIC OPERAND
Pickup:
SETPOINTS
RUN
Curve: TD Multiplier: Reset Time:
Block:
SETPOINT
Off=0
AND
Volts/Hz 1 OP
t
V/ H z
SETPOINTS
Configurable FUNCTION:
Disabled=0
Trip
Alarm Latched Alarm
OR
AN D AND AND
Operate Output
Relay 1(TRIP)
LED: TRIP
OR
LED: ALARM
LATCH
S R
RESET
Command
FLEXLOGIC OPERAND
SETPOINT
Relays
Do Not Operate, Operate
SIGNAL INPUT:
SETPOINT
Phase Voltage Inputs from Ph VT Bnk1-J2
MAX
WYE Delta
Van Vbn Vcn
Vab Vbc Vca
Auxiliary Voltage Inputs from Aux VT Bnk1-J2
Ph VT Bnk1-J2
Aux VT Bnk1- J2
J2-3VT Frequency
Actual Values
Actual Values
J2-Vx Frequency
V, F V, F
Voltage Mode:
Vx