PENSTOCK CONTROL
A
penstock
(motorized liquid flow control gate) is often used to control and maintain
open channel flowrate. In some cases, penstock control is used to limit storm flow
conditions through the channel by diverting excess (storm condition) flow to a
temporary holding vessel.
To monitor open channel flow downstream from a penstock, see the note at the end
of the OCM application example.
The HYDRO+ provides time step penstock control based on open channel level with
only minimal application programming. For the following example, we’ll assume
Operation was set for "level" (P001 = 1) and Empty (P006) was set from the
transducer face to the channel bottom.
RELAY INTERCONNECTION
The relay contact illustrations adjacent to the HYDRO+ relay terminals are shown in
the power off, de-energized, alarm on, control off condition.
Connect the HYDRO+ relays as follows:
RL1 to "OPEN" control (energized = open penstock per P112,P114 and P115)
RL2 to "CLOSE" control (energized = close penstock per P112, P114 and P115)
RL3 to Hi Alarm (energized = alarm off, de-energized = alarm on)
RL4 to Lo Alarm (energized = alarm off, de-energized = alarm on)
RL5 not used
transducer
penstock
storm
spillway
PL-507 48
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