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ETAP Advanced Relay Testing & Transient Simulator (ARTTS)
The ETAP Advanced Relay Testing and Transient Simulator (ARTTS) is a new concept that utilizes hardware and software technologies for testing, calibrating, and simulating relays.

ETAP ARTTS combines the short-circuit and protection device coordination capabilities of ETAP with the relay testing hardware. It provides actual steady-state and transient responses of relays for comparisons with the manufacturers published data. ARTTS is designed to improve system protection, coordination, and reliability, hence decreasing operational and maintenance costs.
ARTTS provides the bridge between the relay-testing hardware and power system simulation technology. While ETAP Star provides a revolutionary method of analyzing and simulating the protective device coordination and protection view via an intelligent one-line diagram, ETAP ARTTS determines the actual operation of protective relays based on steady-state and dynamic transient waveforms and compares the captured relay response with that of manufacturer published curves.


ARTTS Hardware
Advanced protection relay test set and measurement system. It can test 24 different relay types, watt-hour meters, transducers, and meters.
ARTTS SoftwareSuite of software modules for automatic testing and simulation of protective relays and measurement devices.
Star-ARTTS Interface
Fully integrated interface for ETAP Star coordination/ selectivity module and ARTTS hardware.
ETAP ARTTS Can Test The Following Relays| Relay Type | IEEE No. |
| Distance Relay | 21 |
| Synchronizing Device | 25 |
| Under/Over-Voltage Relay | 27/59 |
| Directional Power Relay | 32 |
| Field Relay | 40 |
| Reverse Phase Current Relay | 46 |
| Phase Sequence Voltage Relay | 47 |
| Incomplete Sequence Relay | 48 |
| Instantaneous Overcurrent Relay | 50 |
| Inverse Time Overcurrent Relay | 51 |
| Power Factor Relay | 55 |
| Voltage Balance Relay | 60 |
| Ground Detector Relay | 64 |
| Directional Overcurrent Relay | 67 |
| Phase Angle Out-of-Step Relay | 78 |
| Automatic Reclosing Relay | 79 |
| Frequency Relay | 81 |
| Pilot Wire Receiver Relay | 85 |
| Lockout Relay | 86 |
| Differential Protection Relay | 87 |
| Voltage Directional Relay | 91 |
| Power Directional Relay | 92 |
| Tripping Relay | 94 |


