Description
A self-contained motor and generator set that operates as a second generator for Power System Trainer. It provides extra experiments and studies into power generation. The motor (prime mover) and generator set consists of two coupled machines mounted in the base of the control console. Manual or different types of automatic excitation control the output of the generator. A vector drive controls the speed of the motor. Digital meters show the conditions of the prime mover and generator. The relays show students how actual generators are protected and the different ways that they are protected. Students can set the relays from their control panels. The relays also include sockets to link them to a suitable computer (computer not included) for more detailed programming, if needed. The relays operate the circuit breakers around the second generator. The circuit breakers also include hand-operated switches, and lamps. The lamps show whether the circuit-breaker is open or closed. The Second Generator links to the Power System Trainer at the higher voltage (transmission) level to simulate central generation, for example main power stations. The Second Generator also links to the Power System Trainer at the lower voltage (utilisation) level to simulate embedded generation directly to a load, for example a generator at a factory or hospital. Multifunction digital meters at the generator output and the utilisation and distribution outputs show the conditions of all three phases
Learning Outcomes
- Central and embedded generation
- Synchronising and parallelling with another threephase source (mains or generator)
- Load sharing and stiff /weak systems
- Circulating current monitoring
- Three-source systems: connecting the generator at the central generation or embedded generation level
- Automatic voltage regulator operation in constant reactive power and constant power factor modes
Specifications
Atico is committed to a programme of continuous improvement; hence we reserve the right to alter the design and product specification without prior notice.
Nett dimension and weight:
2100 mm long x 2000 mm high x 1500 mm front to back. Allow an extra 500 mm to its left side for power connections, and an extra 1500 mm at the back when access doors are open. 930 kg
Approximate packed volume and weight:
5 m3 and 1500 kg
Generator and motor:
6 kVA maximum (operated at a nominal 2 kVA), four-pole salient pole a.c generator. Brushless, with automatic and manual excitation.
7 kVA maximum induction motor with shaft encoder and electronic four-quadrant a.c vector drive control.
Relays:
Generator bus protection: overcurrent and earth fault
Generator protection: over speed and under speed, overvoltage and overcurrent, and loss of mains (from rate of change of frequency and voltage vector shift)
Meters:
2 x multi-function meters to show voltage, current and power
4 x digital meters to show generator excitation voltage and current, prime mover speed and generator load angle
Distribution transformer:
220 V to 110 V delta-to-delta (Dd0) with adjustable primary tappings and an earthing transformer to the secondary windings
Generator transformer:
220 V to 220 V delta-to-star (Dy11) with adjustable secondary tapping and an earth link for the secondary star point
Operating Conditions
- Operating Environment:
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
