Samwha DSP CTL - Operation Time Characteristics; Comprehensive Technical Specifications

Digital Motor Protection Realy
DSP-C Series
Operation Time
DIV
Description
Operation time
Remark
Over current(OC)
in case the load current greater than preset value
is sensed
Definite time:0.1~60 sec/adjustable
Inverse time:5~30class
C Series
Under current(UC)
in case the load current lower than preset
value is sensed
0.1~30 sec
Phase loss(PLc)
In case one of three phase is a state of phase loss
1sec~5sec
reverse phase(rPc)
0.5sec
Locked rotor(LC)
In case the starting current greater than 300% of
"OC" preset value is kept after dt is elapsed
0.1sec
0.5sec~3sec
In case the 180~700% running current of
preset "OC" value is sensed
Shock/Stall
Current
unbalance(ub)
1sec ~8sec
0.1~30 sec
in case the ground fault current greater than
preset value is sensed
Ground fault(EC)
to ptotect over temperature sensed by PT100
8sec,only for CCM-PT/CCL-PT type
Technical Specification
DIV
Description
Load Current
range
10 Type
70 Type
With External CT
*0.5A~10A or external CT(0.5~6A)
*0.5~6A for short circuit protection
*Inverse T-I : 0.5~10A/800%
*5A~70A
*5~25A for short circuit protection
*Inverse T-I : 5~40A/800%
1A~1200A
Ground fault
Time preset
Zero phase current
*30mA~2A
*sensed through external ZCT or embedded ZCT
Starting delay time(dt)
1~300 sec/def.
1~60 sec/def.
over current trip delay(ot)
5~30Class/inv.
under current trip delay(uc)
1~30sec/def.
Ground fault starting delay time(Edt)
OFF,0.1~25 sec/def.
Ground fault trip delay time(Eot)
Shock/stall trip delay time(st)
0.5~3sec/def.
Phase loss trip delay time(PLc)
1~5sec/def.
[max current-min current)/max current] * 100%
0.5~30 sec/def.
In case the order of load current phase
is changed like "RTS" from "RST"
7
Temperature(tEmP)