Motor Protection
REM610
Product version: C
21. Functions, codes and symbols
Table 37. Functions included in REM610
Functionality
Protection
Three-phase thermal overload for motors
Motor startup based on thermal stress calculation
Three-phase definite-time overcurrent, low-set
stage
Three-phase overcurrent, high-set stage
Inverse-time unbalance protection based on
negative phase-sequence current
Phase reversal protection
Undercurrent (loss-of-load)
Non-directional earth fault, low-set stage
Cumulative startup time counter and restart inhibit
function
Circuit-breaker failure
Temperature protection using RTD sensors or
thermistors
Lockout relay function
Condition monitoring
Trip circuit supervision
Restart inhibit function
Measurement
Disturbance recorder
Residual current
Three-phase current
Thermal level
Negative phase-sequence current
Temperature measurements via RTD inputs
32
Issued: 30.10.2009
IEC 60617
IEC-ANSI
θ>
49M
2
I
x t
48/14
s
s
I
>
51/14
s
I>>
50/51
I
>
46
2
REV
46R
I<
37
I
>
51N
0
Σtsi
66
CBFP
62BF
ThA>, ThB>
49/38
86
TCS
TCS
RESTART
RESTART INHIBIT
DISABLE
I
I
0
n
L
, L
, L
I
, I
1
2
3
a
θ
TH LEVEL
I
I
2
2
RTD1, RTD2,
RTD1, RTD2,
RTD3, RTD4,
RTD3, RTD4,
RTD5, RTD6
RTD5, RTD6
1MRS756304 C
, I
b
c
ABB