Specifications

A.11
A
M-PACT
M-PRO
Long Time Protection
• Pickup adjustable from 0.4 to 1.0x In in steps of 0.1
• Pickup adjustable from 0.4 to 1.0x In in steps of 0.01
Long Time Characteristic
• To IEC 947-4 Class 40 (& IEC 255, 80 combinations)
• To IEC 947-4, Class 20
Short Time Protection
• 2, 3, 4, 6, 8 ,10 ,12x Ir
• 1.5, 2, 3, 4, 6, 8 ,10 ,12x Ir
Short Time Delay
• Instantaneous, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0s.
• Instantaneous to 1.0s in 0.1 steps
Short Time I
2
t Cropping
• 0.1 times selected long time
• Pick-up, 1.5, 2, 3, 4, 6, 8, 10 and 12 x Ir
Neutral Protection
Earth fault protection
• Unrestricted (UEF)
• Restricted (REF)
• Standby (SEF)
• Earth fault pickup, OFF, 0.4 to 1.0x In. 0.2 In steps
• Earth fault pickup, OFF, 0.1 to 1.0x In. 0.01 In steps
• Time delay, Instantaneous to 1.0 sec. 0.1 steps
• Earth fault cropping, 1 (OFF), 1.5, 2, 2.5, 3, 4, 5 and 6
Thermal Memory
• 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 LED’s for each fault type
• Fault codes (via Communications unit)
Output Relays
• Load Monitoring
• Trip Initiated
• HV Inter trip (linked to REF)
• Remote ACB switching (Open / Close via Comms. Unit)
Communications MODBUS protocol
Trip Reset
• Manual (push button)
• Automatic
Other Optional Features
• Trip Alarm Contacts (mechanical C/O)
• Watchdog / Watchdog disable
• Auxiliary Power Unit
• Ammeter
• Operations counter
• Trip History (previous 16 trips)
• Main Contact Maintenance Indication
Inputs (Programmable)
• 24 - 48V DC
• 110-130V DC or 110-250V AC
PAMM (Plant Associated Memory Module)
• Small connector
• Large connector
Test Connector
• 15 way D-type
• 16 way DIL heater
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(1) Only UEF or Neutral protection option (not both)
(2) Standard feature when communications option is specified
(3) Standard feature when Restricted Earth Fault option is specified
(4) Feature not available if communications option is specified
(5) Auxiliary power unit required
L =low voltage inputs
H = higher voltage inputs
● Standard feature
❍ Optional feature
17 20 30 40
M-PRO Microprocessor Protection Relays - Specifications