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Wherever power is provided by a small
local power system with generators such as diesel generator sets,
wind or hydro turbines or a combination, there is the possibility of
blackouts caused by overloads or unbalanced loads on the system. It
is possible that sensitive equipment like computers or DVD players
may be affected by voltage dips. In many local power systems fuel,
wind or water can be wasted when the generators have to run at times
of low power demand. Load controllers such as DILCs will help to
solve these problems if they are used appropriately on the power
system. DILCs should be deployed throughout the system on loads that
it is acceptable to switch off, or defer, at times when demand
exceeds supply. It may also be required to switch some loads on when
there is a surplus of energy, and DILCs can perform this task also.
DILCs are available in a number of casing options:
•
as a plug-and-socket adaptor for UK and
Europe,
•
as a DIN-rail type, and
•
in a wall-mounting enclosure with a
miniature circuit breaker (“MCB”) in series
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DILC
in wall mounting enclosure as installed on Island
of Foula,
Scotland (also available as DIN-rail type)
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These different casings allow
flexibility in the way in which DILCs are deployed – on heating
circuits, on whole rings and on individual loads. Whichever option
is employed the settings and manner of application is the same.
A DILC will disconnect its load
immediately if the system frequency or voltage fall below their
threshold values. When the system frequency and voltage achieve the
required conditions for the load to be switched on, it begins a
time-out and then switches on the load. The timeout period will be a
random value within a pre-set range.
DILCs can
operate in one of two modes: frequency sensing only, or frequency
and voltage sensing. In both cases, a time-out delay setting must be
chosen, between 8 seconds and 16 minutes, and this incorporates a
random factor to avoid simultaneous connection of multiple loads.
Technical Information
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Product Compliance |
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EU Directives Low
voltage directive (72/23/EEC) |
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(CE marked) EMC
directive (89/336/EEC) |
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Mechanical
and Environmental |
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Dimensions |
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LDC-2P
LDC-2R
LDC-2W |
120 x 65 x 85 mm (h x w x d
excl. pins)
75 x 50 x 110 mm (h x w x d)
178 x 129 x 128 mm (h x w x d) |
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Weight |
Mounted |
Packed
(std. packaging) |
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LDC-2P
LDC-2R
LDC-2 |
0.35 kg
0.3 kg
1.0 kg |
TBA
TBA
TBA |
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Ambient temperature - operation
Ambient humidity Indoor use only
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-10 °C to +40 °C |
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Ratings |
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Frequency
Nominal voltage (Vn)
Burden Approx.
Maximum load
resistive
Supply protection
(wall-mounting only) |
44
to 66 Hz 110/230 VAC
Operating range Vn = 110 VAC
100 to 120 VAC
Vn = 230 VAC 180 to 260 VAC
75 mA
16 A or 3 kW single phase AC
16 A type B MCB |
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User Configuration |
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Nominal frequency
Frequency threshold
Voltage threshold
Voltage step change
Time delay range
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fn =
50 Hz fn = 60 Hz
fn = 50 Hz
fn = 60 Hz
disabled, 10, 15, 20 % Vn
8 s to 2 min, 2 to 4 min, 4 to
8 min, 8 to 16 min |
47.35 - 52.08 Hz
53.15 - 59.19 Hz
disabled, 195, 190, 185 V
disabled, 105, 100, 95 V |
| Indication |
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Output on
Output off - voltage/frequency
low
voltage/frequency OK,
timing to switch-on
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Green LED
Yellow LED (steady)
Yellow LED (flashing) |
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| Accuracy |
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Frequency
Voltage
Delay to switch-on |
±0.5 Hz
±5 V
±1 s |
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Benefits
24 hour power
No blackouts
No wasteful dumping of
excess generation
Prioritised loads
Essential loads protected
Integration of renewable
energy
Efficient use of generation
Improved use of diesel generation
Features
- Non-essential loads are switched off
temporarily when system nears overload
- Excess energy is usefully deployed
- Sensitive loads are protected from
“brown out” conditions
- Loads are gradually re-introduced in a
random order as power system stabilises
WE CAN SUPPLY
WHOLESALE AND BULK ORDERS.
ALL OUR PRICES INCLUDE VAT.
CARRIAGE COSTS
DEPEND ON WEIGHT SO PLEASE CALL US TO DISCUSS YOUR REQUIREMENTS
CALL US ON: 0208 663 3273
FOR FURTHER DETAILS AND
NO OBLIGATION FREE ADVICE
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Tel: 0208 663 3273 Fax: 0208 650 9037 email: sales@brightgreenenergy.co.uk
