The megavolt-ampere reactive hour (MVARh) is an intriguing unit that measures reactive energy, which often goes unnoticed in everyday electrical consumption. Unlike active power measured in kilowatt-hours (kWh), which does real work like lighting a bulb, reactive power is vital for maintaining voltage levels necessary to keep the electrical system stable. It’s the unsung hero ensuring the efficiency and safety of power distribution networks.
Reactive power doesn’t perform tangible tasks, but it is essential for the AC power system’s health. In large-scale operations like factories, an adequate balance of reactive power can lead to significant cost savings by reducing the need for additional transmission capacity. It’s a concept that highlights the unseen complexities behind the convenience of flipping a switch.
The kilovolt-ampere reactive hour (kVARh) is a unit used to measure reactive energy, an essential concept in the realm of alternating current (AC) electrical systems. Reactive energy differs from active energy, in that it does not do useful work but is crucial for maintaining voltage levels necessary for the stability and efficiency of electricity networks. This energy arises due to the presence of inductive and capacitive loads, such as motors and transformers, in the power system.
Interestingly, despite reactive power not performing work directly, it has a direct impact on the efficiency and cost-effectiveness of power delivery. Utilities often impose charges based on reactive energy consumption to encourage users to improve their power factor, thereby optimizing their energy use and relieving stress on the grid infrastructure. Understanding and managing kVARh can lead to significant cost savings and enhanced grid reliability.
Megavolt-Amperes Reactive Hour | Kilovolt-Amperes Reactive Hour |
---|---|
0
MVARh
|
0
kVARh
|
1
MVARh
|
1000
kVARh
|
2
MVARh
|
2000
kVARh
|
3
MVARh
|
3000
kVARh
|
4
MVARh
|
4000
kVARh
|
5
MVARh
|
5000
kVARh
|
6
MVARh
|
6000
kVARh
|
7
MVARh
|
7000
kVARh
|
8
MVARh
|
8000
kVARh
|
9
MVARh
|
9000
kVARh
|
10
MVARh
|
10000
kVARh
|
11
MVARh
|
11000
kVARh
|
12
MVARh
|
12000
kVARh
|
13
MVARh
|
13000
kVARh
|
14
MVARh
|
14000
kVARh
|
15
MVARh
|
15000
kVARh
|
16
MVARh
|
16000
kVARh
|
17
MVARh
|
17000
kVARh
|
18
MVARh
|
18000
kVARh
|
19
MVARh
|
19000
kVARh
|
20
MVARh
|
20000
kVARh
|
21
MVARh
|
21000
kVARh
|
22
MVARh
|
22000
kVARh
|
23
MVARh
|
23000
kVARh
|
24
MVARh
|
24000
kVARh
|
25
MVARh
|
25000
kVARh
|
26
MVARh
|
26000
kVARh
|
27
MVARh
|
27000
kVARh
|
28
MVARh
|
28000
kVARh
|
29
MVARh
|
29000
kVARh
|
30
MVARh
|
30000
kVARh
|
31
MVARh
|
31000
kVARh
|
32
MVARh
|
32000
kVARh
|
33
MVARh
|
33000
kVARh
|
34
MVARh
|
34000
kVARh
|
35
MVARh
|
35000
kVARh
|
36
MVARh
|
36000
kVARh
|
37
MVARh
|
37000
kVARh
|
38
MVARh
|
38000
kVARh
|
39
MVARh
|
39000
kVARh
|
40
MVARh
|
40000
kVARh
|
41
MVARh
|
41000
kVARh
|
42
MVARh
|
42000
kVARh
|
43
MVARh
|
43000
kVARh
|
44
MVARh
|
44000
kVARh
|
45
MVARh
|
45000
kVARh
|
46
MVARh
|
46000
kVARh
|
47
MVARh
|
47000
kVARh
|
48
MVARh
|
48000
kVARh
|
49
MVARh
|
49000
kVARh
|
50
MVARh
|
50000
kVARh
|
51
MVARh
|
51000
kVARh
|
52
MVARh
|
52000
kVARh
|
53
MVARh
|
53000
kVARh
|
54
MVARh
|
54000
kVARh
|
55
MVARh
|
55000
kVARh
|
56
MVARh
|
56000
kVARh
|
57
MVARh
|
57000
kVARh
|
58
MVARh
|
58000
kVARh
|
59
MVARh
|
59000
kVARh
|
60
MVARh
|
60000
kVARh
|
61
MVARh
|
61000
kVARh
|
62
MVARh
|
62000
kVARh
|
63
MVARh
|
63000
kVARh
|
64
MVARh
|
64000
kVARh
|
65
MVARh
|
65000
kVARh
|
66
MVARh
|
66000
kVARh
|
67
MVARh
|
67000
kVARh
|
68
MVARh
|
68000
kVARh
|
69
MVARh
|
69000
kVARh
|
70
MVARh
|
70000
kVARh
|
71
MVARh
|
71000
kVARh
|
72
MVARh
|
72000
kVARh
|
73
MVARh
|
73000
kVARh
|
74
MVARh
|
74000
kVARh
|
75
MVARh
|
75000
kVARh
|
76
MVARh
|
76000
kVARh
|
77
MVARh
|
77000
kVARh
|
78
MVARh
|
78000
kVARh
|
79
MVARh
|
79000
kVARh
|
80
MVARh
|
80000
kVARh
|
81
MVARh
|
81000
kVARh
|
82
MVARh
|
82000
kVARh
|
83
MVARh
|
83000
kVARh
|
84
MVARh
|
84000
kVARh
|
85
MVARh
|
85000
kVARh
|
86
MVARh
|
86000
kVARh
|
87
MVARh
|
87000
kVARh
|
88
MVARh
|
88000
kVARh
|
89
MVARh
|
89000
kVARh
|
90
MVARh
|
90000
kVARh
|
91
MVARh
|
91000
kVARh
|
92
MVARh
|
92000
kVARh
|
93
MVARh
|
93000
kVARh
|
94
MVARh
|
94000
kVARh
|
95
MVARh
|
95000
kVARh
|
96
MVARh
|
96000
kVARh
|
97
MVARh
|
97000
kVARh
|
98
MVARh
|
98000
kVARh
|
99
MVARh
|
99000
kVARh
|
100
MVARh
|
100000
kVARh
|
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