Description
A test set that gives students theoretical and practical experience with a variety of industrial relays. The equipment uses industrial protection equipment and techniques, and a range of industrial relays, adapted for educational use. The test set allows students to compare individual relay characteristics. It also allows connection of two relays for experiments such as relay discrimination. The test set includes meters, current and voltage transformers (CTs and VTs), power supplies, a configurable transformer and load resistors. It also has a useful desk space for students to work on. The configurable transformer has a star connected primary, but the secondary has multiple tappings. So, the user may connect it as delta or star with different voltage ratios. Controls on the lower panel of the test set allow the user to adjust the test voltage supply, current and load resistances. A transmission line on the upper panel of the test set allows students to set up distance protection and parallel feeder tests. we supply each relay in rugged, portable enclosures. The relays rest on the desktop either end of the test set. The user programs the relays either directly or using software. The test set includes relay support software which enables users to program the relay modules using a suitable computer (computer not included). Students connect the relays to the test circuits on the front of the test set. A multi-core cable connects from the back of the test set to the back of each relay to give it a supply current for correct operation. The test set has clear schematic diagrams to help students carry out and understand the experiments.
Learning Outcomes
- Overcurrent protection
- Relay discrimination using current and time settings
- Directional protection
- Differential protection
- Earth fault protection
- Distance protection
- Current Transformer (CT) polarity
Features
- Includes a complete set of modern digital protection relays, specially adapted for
educational use - Transmission line for distance protection and parallel feeder tests
- Transformer with confi gurable secondary tappings for tests with diff erent phase displacements
- Tests two relays at the same time
- Includes all controls, supplies, load resistors, transformers and instrumentation needed for the tests
- Additional desk space for the relays
Specifications
Nett dimensions and weight : 2660 mm long x 1890 mm high x 1020 mm front to back and 731 kg
Approximate packed dimensions and weight : 5 m3 and 930 kg
Nett and packed dimensions of Relays: Refer to separate datasheets.
Recommond Floor area : >1000 mm at the back of the test set and >2000 mm around the front and sides
Controls and instrumentation:
• 0 to 220 V variable voltage supply
• 0 to 10 A variable current supply
• Two fault limiting resistors
• Timed fault application circuit breaker
• Confi gurable tapped transformer with delta or star secondary
• Variable three-phase load delta connected
• Variable three-phase load star connected
• Four sets of three-phase current transformers
• Two sets of three-phase voltage transformers
• Mains isolator
Test circuits:
• Relay test circuit
• Confi gurable transformer test circuit
• Transmission line model (5 x 50 km)
Protection relays included:
• Overcurrent and Earth Fault Relay
• Diff erential Protection Relay
• Directional/Non-Directional Overcurrent Relay
• Feeder Management Relay
• Distance Protection Relay
Refer to separate datasheets for details.
Operating Conditions
- Operating Enviroment:
Laboratory - Storage Temprature Range :
–25°C to +55°C (when packed for transport) - Operating Temprature range:
+5°C to +40°C - Operating relative humidity range:
80% at temperatures < 31°C decreasing linearly to 50% at 40°C
