IMM 8001/8002 – Digital Motor Protection Relay
ICE / CEE
____________________________________________________________________________________________
IMU307-1 GB Ind. B
4
1.1.1. Protection function table
ANSI CODE
PROTECTION
Trip
Alarm
Restart
inhibit
[49]
Thermal overload trip
Ith>
[49]
Thermal overload alarm
Ith> Al
[26] *
Level 1: temperature rise
Sx
θ
1
(Nota 1)
[26] *
Level 2: temperature rise
Sx
θ
2
(Nota 1)
[26] *
Wiring fault
Nota 2
•
[5-49]
Start permitted by thermal state
Nota 3
[5-66]
Number of start limitation
Nota 4
[5-27/59]
Start permitted by voltage range
Nota 5
[48]
Too long start
Ist>
[51STALL]
Rotor stalling after start
Istl>
[51LR]
Rotor stalling during start
Ilr>
[46]
Current unbalance
Ineg>
[50]
Short-circuit
I>>
[51N]
Earth
fault (inverse time)
I0>
[51N]
Earth fault (definite time)
I0>>
[37P/I]
Loss of load
P< or I<
[27]
Under voltage after start
U<
[27ST]
Under voltage during start
Ust<
[27RC]
Under voltage for re-acceleration
Urc<
[59]
Over voltage low-set level
U>
[59]
Over voltage high-set level
U>>
Trip loop fault
TSUP>
* IMM 8002 only
Nota 1 :
x = 1, 2, 3 = Number of the detector.
Nota 2 :
•
Display "Dw Sx (with x= Number of the detector) for fault "open wire"
•
Display "Ds Sx (with x= Number of the detector) for fault "wire in short-circuit"
Nota 3 :
Switch the display to the item "thermal state motor"
Nota 4 :
Switch the display to the item " Prohibited time
Start remaining"
Nota 5 :
Switch the display to the item "Measure U3.1 voltage"