WEG VBWC Series, Инструкция по установке, эксплуатации и обслуживанию

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Vacuum Circuit Breaker | 15
8.1 UNDER VOLTAGE TRIP DEVICE, [UVT]
„
UVT coil trip the VCB when the voltage is lower than 0.6x Nominal Voltage;
UVT coil is instantaneous. The UVT time delay controller is able to adjust the delay tripping up to 3s.
„
The operation of the VCB is not possible mechanically or electrically if the voltage of UVT coil is smaller than
the voltage range showed in the tabel below. UVT coil connection is by terminals D1 and D2
Rated voltage (Vn) Operating voltage range (V) Power consumption (VA or W)
Trip time (ms)
DC (V) AC (V) Pick up Drop out Inrush Steady-state
24~30 -
0.65~0.85 Vn 0.4~0.6 Vn 200 5 ≤50 m/s
48~60 48
100~130 100~130
200~250 200~250
Table 8.2: UVT Coil Characteristics
8.1.1 Specionation of Remote Control Cables minumum gauge
Refer to the below table regarding the length of wire when using trip coil with 24~30 [V] or 48~60 [V] of rate voltage
as power consumption due to inrush current is about 200 VA for coil operation. Coil can be non-operating in case
of not corresponding with the wire specification listed below:
Rated voltage (Vn)
DC 24~30 (V) DC/AC 48 (V)
Wire type #14 AWG (2,08 mm
2
) #16 AWG (1.31 mm
2
) #14 AWG (2.08 mm
2
) #16 AWG (1.31 mm
2
)
Operating Voltage
100% 48,5 m 30,5 m 233,2 m 143,9 m
85% 13,4 m 8,8 62,5 m 39,3 m
Table 8.3: Cable Control Minumum Gauges
8.1.2 UVT assembly position and wiring diagram.
UVT Coil
Figure 8.3: UVT Coil
8.2 LATCH CHECKING SWITCH (LCS)
„
LCS indicating the state whether the closing operation is available or not;
„
Output “b” contact can be generated at OFF & Charge status. And this condition means it’s ready for
closing operation.
Figure 8.4: Latch Checking Switch
*When the Latch is in abnormal position, this LCS prevents the closing operation even though there is a ‘Closing’ operation signal if you
connect LCS to the Closing coil in series.