6
4. Tripping
4.1 Tripping Display
During tripping, Trip LED on, Thermal LED also on
during thermal overload tripping. Function LED and Data
LED blinks showing tripping current or source as shown
below:
4.2 Tripping Reset
During tripping condition, press "RESET/MODE" to
reset, the relay will reset if condition permits. If relay is
set to auto reset, the relay will reset automatically if the
tripping condition is cleared with a 5% hysteresis.
4.3 Tripping Test
Press and hold "TEST" for 3.5 seconds to simulate a
tripping condition, Trip LED blinks when "TEST" is
pressed. During Test Tripping, "tESt" blinks, R1 off and
R2 on if set to "On any tripping". Press "RESET/MODE"
to reset. Tripping Test is disabled when motor is
starting/running.
4.4 Binary Input Tripping
When Binary input is set to 2 - Instant tripping, binary
input will generate a tripping condition. "triP" will blink,
R1 off and R2 on if set to "On any tripping". Press
"RESET/MODE" to reset. If relay is set to auto reset, the
relay will reset after the input is normal for 1s.
4.5 Tripping History Display
During Current/Thermal display, press "RESET/MODE"
to jump to Tripping History Display. Display shows the
previous tripping status with a 'dot' blinking at Function
LED. To clear tripping history, press "UP" and "DOWN"
simultaneously.
5. Typical Application Diagram
Trip LED Thermal
LED
Function
LED
Data LED
Description
On
On
t oL
Thermal Overload
On
Off
2 tripping current
Short circuit tripping
On
Off
4 tripping current
Undercurrent tripping
On
Off
6 Ub
Unbalance tripping
On
Off
6 PS
Phase sequence error
tripping
On
Off
6 PL
Phase loss tripping
On
Off
8 tripping current
Earth fault tripping
On
Off
A tripping current
Prolonged
starting/Stalled rotor
tripping
On
On
t ESt
Trip Test
On
Off
t riP
Binary input tripping
Aux
6
2
3
4
5
L
R1
R2
N
9
10
11
12
13
14
7
15
8
16
1
MPR 500
Table 2: Tripping display
L1
L2
L3
M
K1
N
K1
H1
S2
S1
K1
Block R1/
Reset/
Trip
Start
Stop
NO
NC
COM
COM
NC
NO
Binary
input
Figure 5: Example of application
F1 F2 F3
F4
tripping
3-Phase Motor
Aux
6
2
3
4
5
L
R1
R2
N
9
10
11
12
13
14
7
15
8
16
1
MPR 500
L
M
K1
N
K1
H1
S2
S1
K1
Block R1/
Reset/
Trip
Start
Stop
NO
NC
COM
COM
NC
NO
Binary
input
F1
F2
Single-Phase Motor*
* To use MPR500 for single-phase protection, Io>> Earth
fault, Phase sequence and phase loss protection should be
set to off.
