| Power Transmissions and Distribution: PTD-2920 |
FEATURES
1. Simulation of power transmission and distribution starting from a Power Plant → Primary Station ( "Y-Y", and "Y-Δ", and "Δ-Δ" Conversions ) → Two transmission cables ( with Fault Testing ) → Secondary Station ( unbalanced output 220V-190V-110V) → Client → Parallel Operation with external power supply ( Phase Sequence Test ) → Client-site or On-pole substations ( Transformer ) → Load Input Test. Students learn to understand the process of power transfer.
2. Protection relays can be individually connected for external test.
3. Experiments include:
(1) Phase-R grounding through resistors.
(2) Two-phase short circuit.
(3) Two-phase grounding short circuit.
(4) Three-phase short circuit.
(5)Phases R, S, and T resistors ground test.
(6) Phase-R unbalanced output (220V-190V-110V) tests.
(7) R, L, and C overload test.
(8) Short, Medium, and Long range transmission test on two-wire cable.
(9) T and π Tests on long range transmission.
(10)Power parallel operation.
(11) Power factor adjustment/correction experiment
(12)Three-phase power wave observation.
4. Graphic software control monitors the power system status. (Online monitoring may be wired or wireless mode ). (optional)
HARDWARE SPECIFICATION
A. APPEARANCE
1. Size : 3250mm/132” (W) x 650mm/27” (D) x 1900mm/78” (H) approx.
2. Control processes are silk printed on the front panel.
3. 8 wheels with brakes are installed for ease of mobility.
4. Three screened cooling fans on both sides for system ventilation.
B. MODULES
1. OVERCURRENT PROTECTION RELAY (OCR), 2 pieces
(1) Rated Current: AC 5A.
(2) Time Range: 0.25, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (12 ranges)
(3) Current Range : 3, 3.5, 4, 4.5, 5, 6A (6 ranges), 20-30-40-50-60A- except (6 instantaneous selection ).
(4) Alert Point:
a. AC110V, 7.5A, COSθ = 0.4 (825 VA at maximum AC 250V).
b. DC24V, 5A, L/R=1mS (50VA at maximum DC 125C).
(5) Power Consumption : 6VA or below.
(6) Frequency : 50/60Hz.
(7) Electronic.
2. REVERSE POWER PROTECTION RELAYS (RPR), 2 pieces
(1) Phase Test: Three-phase power , single-phase detection.
(2) Rated voltage :AC 100V, 110V, 200V and 220V.
(3) Current Rating: AC 5A.
(4) Frequency: 50/60Hz.
(5) Contact Rating:
a. AC 220V, 3A, COSθ = 0.4.
b. DC 24V, 4A, L/R = 7mS.
(6) Response Time :0.5S ~ 15S.
(7) Electronic.
3. UNDER-VOLTAGE PROTECTION RELAYS (UVR), 1 piece
(1) voltage: AC 110V
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