800KVA transformer itself is the loss of how much?
S9 type oil change 800kVA no load loss 1400 watts load loss 7500 watts
S11 type oil change 800kVA no load loss 980 watts load loss 7500 watts
S9 type oil change 800kVA Calculation results: no-load loss 1400 watts load load loss of 7500 watts.
Calculation formula of transformer loss
(1) active loss: ΔP = P0 + KTβ2PK ------- (1)
(2) Reactive power loss: ΔQ = Q0 + KTβ2QK ------- (2)
(3) Integrated power loss: ΔPZ = ΔP + KQΔQ ---- (3)
Q0 ≈ I0% SN, QK ≈UK% SN
Where: Q0 - no load reactive power loss (kvar)
P0 - No load loss (kW)
PK - rated load loss (kW)
SN - transformer rated capacity (kVA)
I0% - transformer no-load current percentage.
UK% - short circuit voltage percentage
Β - average load factor
KT - load fluctuation loss coefficient
QK - rated load leakage power (kvar)
KQ - Reactive power equivalent (kW / kvar)
Selection of the parameters of the above formula:
(1) take KT = 1.05;
(2) The reactive power equivalent KQ = 0.1kW / kvar when the 6kV ~ 10kV step-down transformer of the urban power grid and industrial enterprise power grid adopts the minimum load,
(3) the average load factor of the transformer, for agricultural transformer desirable β = 20%; for industrial enterprises, the implementation of three shifts, desirable β = 75%;
(4) transformer operating hours T = 8760h, the maximum load loss hours: t = 5500h.
(5) transformer no-load loss P0, rated load loss PK, I0%, UK%, see the transformer signs shown.
Are 800kVA transformer, the model is different, loss of access great. You find out the model to say, there are standards can be found.
