Conformal coating available (NEW)
Pluggable current and voltage terminals
Binary input thresholds settable using DIGSI (3 stages)
Secondary current transformer values (1 A / 5 A) settable using DIGSI
9 programmable function keys
6-line display
Buffer battery exchangeable from the front
USB front port
2 additional communication ports
Integrated switch for low-cost and redundant optical Ethernet rings
Ethernet redundancy protocols RSTP, PRP, and HSR for highest availability
Relay-to-relay communication through Ethernet with IEC 61850 GOOSE
Millisecond-accurate time synchronization through Ethernet with SNTP
Number of binary inputs and binary outputs by a connection from up to two SICAM I/O-Units extendable.
Protection Functions:
Overcurrent protection (50, 50N, 51, 51N)
Directional time-overcurrent protection (67, 67N)
Sensitive dir. ground-fault detection (67Ns)
High-impedance restricted ground fault (87N)
Undercurrent monitoring (37)
Overload protection (49)
Under-/overvoltage protection (27/59)
Frequency protection (81O/U)
Breaker failure protection (50BF)
Negative-sequence protection (46)
Synch-check (25)
Auto-reclosure (79)
Fault locator (21FL)
Lockout (86)
Control Functions/Programmable Logic:
Commands for control of CB, disconnect switches (isolators/isolating switches)
Control through a keyboard, binary inputs, DIGSI 4, or SCADA system
User-defined PLC logic with CFC (e.g. interlocking)
Monitoring Functions:
Operational measured values V, I, f
Energy metering values Wp, Wq
Circuit-breaker wear monitoring
Minimum and maximum values
Trip circuit supervision (74TC)
Fuse failure monitor
8 oscillographic fault records
Communication Interfaces:
System/service interface
IEC 61850 Edition 1 and 2
IEC 60870-5-103 and IEC 60870-5-104
PROFIBUS-DP
DNP 3.0
MODBUS RTU
DNP3 TCP
PROFINET
Ethernet redundancy protocols RSTP, PRP, and HSR
Hardware:
4 current transformers
0/3 voltage transformers
3/7 binary inputs (thresholds
Application: Optimized for three-position disconnectors, switchgear interlocking, suitable for redundant master station, automation via CFC
Control Functions: Number of switching devices limited by I/Os, graphic display of element positions, local/remote switching via key, 4 assignable function keys, measured-value acquisition, signal & command indications, P/Q/cosφ calculations, event logging, switching statistics
Monitoring Functions: Operational measured values, energy metering, time of operation, slave pointer, self-supervision
Communication Interfaces: IEC 61850 Ethernet, IEC 60870-5-103, PROFIBUS-FMS/DP, DNP 3.0, MODBUS, DIGSI 4 service & front interface, time sync via IRIG-B/DCF77
Hardware & Mounting: Operator panel separate if required, key-operated switches for authority, large graphic display with keyboard
Type: Numerical overcurrent and earth fault relay
Models: 7SR1002, 7SR1003, 7SR1004, 7SR1005
Protection functions: Overcurrent (50/51), Earth Fault (50N/51N), Thermal Overload (49), Broken Conductor (46BC), Negative Phase Sequence (46NPS), Sensitive Earth Fault (50SEF/51SEF), CB Fail (50BF), Cold Load Pickup (51C), etc.
Supervision: Trip Circuit Supervision (74TC), Total Harmonic Distortion (81THD)
Control: Lockout (86), CB Control
Power Supply: Universal AC/DC supply
CT Input: 1A / 5A site-selectable
Communication: USB (front), RS485 MODBUS RTU / IEC 103 (rear)
I/O: Up to 6 Digital Inputs and 6 Digital Outputs
Case: Size 4, 4U high, non-draw-out
Applications: Distribution and industrial protection, motor and voltage-based protection
Standard: IEC 60255 compliant
