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M-PRO Microprocessor Protection Relays - Specifictions
Trip Unit
Long Time protection
Pickup adjustable from 0.4 to 1.0 x I
Pickup adjustable from 0.4 to 1.0 x I
Long Time characteristics
To IEC 947-4, Class 20
To IEC 947-4, Class 40 (& IEC 255, 80 combinations)
Short Time protection (fixed short time protection)
1.5,2,3,4,5,6,8,10,12 x I
(Frame 1 & 2)
r
Instantaneous Trip (I
)
i
OFF, 2, 3, 4, 6, 8, 10 & 12 x I
Short Time delay
Inst to 1.0s in 0.1 steps
0.1,0.2,0.4,0.5,0,6,0.8,1.0s (Frame 1 & 2)
2
Short Time I
t protection (inverse short circuit protection)
Pickup 1.5,2,3,4,6,8,10,12 x I
0.1 times selected long time
Neutral Protection
Fixed neutral protection
Earth Fault Protection
Unrestricted (UEF)
Restricted (REF)
Standby (SEF)
Earth fault pickup: OFF, 0.4 to 1 x I
Earth fault pickup: OFF, 0.1 to 1 x I
Time delay: Inst to 1.0s in 0.1 steps
Time delay: <100mS,0.1,0.2,0.4,0.6,0.8,1.0
Earth fault cropping: 1(OFF), 1.5, 2, 2.5, 3,4,5 and 6
Local Point Customization
Late point customization (can be derated upto two steps)
Thermal memory or Cooling time
Fixed to at time constant of 20 minutes
Adjustable time constants: inst,10,20,30,45,60,120,180 minutes
Trip indication
Healthy Unit LED
Warning/Alarm LED
Discrete LEDs for each fault type
Fault codes (via communications unit)
Faults
Existing faults
History of trips
Trip History (only last trip)
System Status
Breaker Status
Ammeter
Input Relays (predisposizione)
External Rogowski coil
Auxiliary Power supply
Output Relays
Trip initiated
HV inter trip (linked to REF)
Watchdog/Watchdog disable (No output relay)
Remote ACB Switching (Open / Close via Comms. Unit)
Load monitoring
Communications MODBUS protocol
Trip reset
Manual (Push Button) (Frame 1 & 2)
Automatic (Frame 1 & 2)
Monitoring
Ammeters
Load monitoring
Operations counter
Trip alarm Contacts (mechanical C/O)
Trip History (previous 16 trips)
Main Contact Maintenance Indication
Inputs
24-48V d.c.
110-130V d.c. or 110-250V a.c.
PAMM (Plant Associated Memory Module)
Large connector
Test connector
16 way DIL header
26 way D-type
Test Box
MCR Test (Frame 1 & 2)
Force Trip (Frame 1 & 2)
1) Standard Features when communications option is specified
2) Standard feature when Restricted Earth Fault option is specified
3) Feature not available if communications option is specified
4) Auxiliary Power Unit Required
APPENDIX-K(O
APPENDIX-K(O
APPENDIX-K(O
APPENDIX-K(Ov v v v v er View - Special Featur
APPENDIX-K(O
MPRO 17Plus*
in steps of 0.1
n
in steps of 0.01
n
(Frame 1 & 2)
n
r
in 0.2 I
steps
n
n
in 0.01 I
steps
n
n
(5)
H = High Voltage Inputs
er View - Special Featur
er View - Special Featur
er View - Special Features)
er View - Special Featur
es)
es)
es)
es)
MPRO 18Plus*
MPRO 30
L
(1)
(1)
O
O
O
O
(1)
(1)
O
O
(1)
(1)
O
O
(2)
O
S
(3)
O
O
(2)
O
O
O
(4)
O
* Available for Frame 1 , 2
Standard (
L = Low Voltage Inputs
133
MPRO 40
H
L
H
O
O
(2)
O
(3)
O
O
O
O
(2)
O
O
O
O
S
S
O
O
O
(4)
O
) or Optional (O)
APPENDIX
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