User Manual 59
User Manual 58
Function Description
The smart unit is used for power distribution protection. It can be configured as basic type, Amme-
ter type and harmonics controllers.
Note: Please Contact Noark if customers use functions like Load monitor, Zone-Selection Interlocking and digital input/out-
put DI/DO.
Protection
function
Measurement
function
Maintenance
function
Other
functions
M (Basic type) A (Ammeter type) H (Harmonic type)
Long time protection
Overload pre-alarm
Short time protection
Instantaneous protection
Neutral protection
Ground-fault protection
Current unbalance protection
MCR and HSISC protection
Voltage unbalance protection
Overvoltage protection
Undervoltage protection
Over-frequency protection
Under-frequency protection
Phase sequence protection
Reverse active power protection
Demand value protection
Harmonics protection
Thermal memory
Current measurement
Voltage measurement
Frequency measurement
Power measurement
Power factor measurement
Electric energy measurement
Demand value measurement
Harmonic measurement
Test function
Record of operations
Trip records
Alarm records
Position change records
Contact wear records
Load monitoring
Zone Selective Interlocking
RS485 communication function
Digital input/output DI/DO
Real time clock
LED display
Tri-color LCD display
LED status indication
Button operation
Knob setting
USB test port
Function
Model
4.0 4.0
4.0
HMI
Knob Setting Instructions
Open the standard transparent cover and carry out
the necessary settings of the controller. The knob is
used mainly to set protection parameters: long-time
delay, shor t-time delay, instantaneous, and
ground-fault values. Under normal circumstances,
the knob settings can meet the system require-
ments. Fine-tuning is not necessary for the function
parameters.
Open the standard transparent
cover with a flat-blade screw-
driver
Set the knobs with a
flat-blade screwdriver
Profile of SU
Long time delay
Short time delay
Instantaneous
ground
Long time delay setting Take In=1600A as an example
In=1600A
Ir=0.7xIn=1120A
Tr=2s(@6Ir)
Short time delay setting
Take In=1600A as an example
Note: X=off
In=1600A
Isd=4 xIr=4480A
Tsd=0.4S
Instantaneous parameter setting
Take In=1600A as an example
In=1600A
Ii=15xIn=24000A
Ground-fault protection time setting
Take In=1600A as an example
In=1600A
Ig=880A
Tg=0.4S
Tsd
Tg
Note: “X” of the Tsd setting knob: Disable the short-delay protection.
Tsd setting panel: OFF: definite time setting area; ON: inverse time
setting area
Note: “X” of the Tg setting knob: Disable the ground protection.
Tg setting panel: OFF: definite time setting area; ON: inverse time
setting area
C
M
Y
CM
MY
CY
CMY
K