Protection & Control
Bus Protection
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B90 Bus Differential System
- Cost effective bus protection and metering for up to six feeders.
- Featuring integrated protection for HV and EHV busbars, providing cost effective, feature focused busbar protection.
- Large color graphical HMI and high density I/O option available.
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B30 Bus Differential System
- Three-phase high impedance differential protection for substation busbars.
- A high impedance busbar protection relay, designed to provide busbar differential protection for single or split busbar arrangements.
- Large color graphical HMI and high density I/O option available.
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P741 - Busbar Differential Relay (Central Unit)
- Busbar scheme for centralized or distributed applications up to 8 zones + Check Zone and 28 bays.
- Adaptable to any busbar configuration.
- True sample based sub-cycle operation.
- Fully redundant communications between CU and PU’s.
- IEC 61850-9-2 LE process bus (with P743).
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P742 - Busbar Differential Relay (Peripheral Unit)
- Peripheral Unit used with P741.
- 40TE case with standard IO.
- Backup protection functions (50 N&P/51 N&P/50ST P&N).
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P747 – Busbar Differential Relay
- Complete protection for MV and HV Busbar configurations with up to 4 zones and 18 feeders
- Interoperable with all classes of CT: IEEE, IEC, air-gapped, non-gapped - and CTs with moderate knee point voltage
- 10 integrated function keys, tri-color LEDs, and graphical programmable logic permit the creation of comprehensive schemes, tailored to your needs
- IEC 61850 redundant Ethernet, supporting self-healing ring, RSTP, dual homing or PRP/HSR
- IEC62439 HSR compliant IEC61850 Ed 1
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P746 – Busbar Differential Relay
- Complete protection for MV and HV Busbar configurations with up to 2 zones and 18 feeders
- Option of conventional VT or IEC 61850-9-2LE compliant sampled value Process Bus
- 10 integrated function keys, tri-color LEDs, and graphical programmable logic permit the creation of comprehensive schemes.
- IEC 61850 redundant Ethernet, supporting self-healing ring, RSTP, dual homing or PRP/HSR
- IEC62439 HSR compliant IEC61850 Ed 1
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P743 - Busbar Differential Relay (Extended Peripheral Unit)
- Peripheral Unit used with P741.
- IEC 61850 Ed.1 communication.
- IEC 61850-9-2 LE process bus ready.
- 60TE case with increased IO.
- Backup protection functions (50 N&P/51 N&P/50ST P&N).
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MFAC: High – Speed Differential Protection Relay
- MFAC 14 when only earth fault protection is required, MFAC 34 provides both phase and earth fault protection.
- Applications including generators, reactors, busbars, motors and the individual windings of power transformers.
- Ensuring high stability with through faults, with 'tuned to rated frequency' technique and a wide settings range
- Fast and reliable due to its simple electromechanical construction
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MCAG High - Speed Differential Protection
- Current-calibrated busbar differential relay highly-tuned to the fundamental to prevent spurious operation
- Attracted armature design with simple and robust construction High impedance protection principle
- High stability during through faults, Operation is fast and reliable (25ms at 5 x setting)
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MVTP – Buswire Supervision Relay
- Single and 3-phase Models for continuous Buswire supervision
- Used in high impedance type Busbar protection schemes
- Detects open-circuited Buswire as well as open-circuited main current transformers.
- Integral Buswire shorting facility
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HID High Impedance Differential Module
- Auxiliary resistors and varistors for high impedance differential schemes.
- Provides resistors together with voltage
limiters (MOVs) normally used in conjunction
with a high-speed overcurrent relay to
achieve high impedance differential protection.
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