Vega VRB-25 - Hydrosphere UK Ltd.

guides the way
VRB-25
MARINE ROTATING BEACON
6 OR 8 PANELS LIGHTHOUSE BEACON

VRB-25 MARINE ROTATING BEACON
The VRB-25 is a powerful, reliable and
compact marine rotating beacon suitable
for ranges from 15 to 22 nautical miles.
Six or eight equally-spaced fresnel
lenses rotate around a stationary lamp
of up to 100 Watts, generating six or
eight discrete pencil beams. Individual
beams can be coloured or blanked off
to generate grouped characters.
Powerful Optics
The heart of the VRB-25 is a highperformance
acrylic fresnel lens
designed by Vega to maximise the
useful output from industry-standard
pre focused tungsten-halogen marine
signal lamps. Lenses are held on all
edges in an accurately-machined cage
to ensure precision alignment.
All six beams are consistent in peak
intensity to within 5% of the average.
Every beacon is individually tested
for peak and effective intensities, the
consistency of intensity between beams,
and rotational speed. Factory tests are
performed in a computer-controlled
zero-range photometric facility.
Reliable Mechanicals
The lens carousel is rotated by a
direct-drive electronically-commutated
brushless pancake motor of 280mm
diameter,designed by Vega specially for
the VRB-25. This motor provides plenty
of torque while consuming only 1-2
watts of energy. Two large, heavy-duty,
fully-sealed ball races (packed with
low-temperature grease) are the
only moving parts, and these can be
expected to operate for at least 20 years
without attention.
Intelligent Electronics
A versatile micro-processor based
electronic controller is housed in a
metal capsule sealed with O’rings. This
controls the lampchanger, solar switch
and motor drive. One of the 248 speeds
from 0.5-15.9 rpm can be selected by
adjusting two hex switches. The speed
will be maintained to within ±2%. External
monitoring functions are available, and the
VRB-25 interfaces readily to the VegaWeb
monitoring system.
To ensure maximum lamp life, consistent
output intensity and minimum energy
consumption, the lamp voltage is
regulated using Pulse-Width-Modulation.
Even if the input voltage ranges from
11-20 Volts (as in an unregulated solarpowered
installation) the RMS voltage at
the lamp will never exceed 12VDC.
High-Wattage Lampchanger
The VRB-25 is equipped with a 6-position
VLC-153 lampchanger. Vega has been
building lampchangers for lamps up to
250 Watts for 20 years and the VLC-153
is one of the latest design.
EASY MAINTENANCE
A small removable hatch gives instant
access for lamp replacement.
The electronics module can be removed
from the base by sliding two latches.
All external fasteners are captive.
The entire Glazing Assembly lifts off
after twisting eight latches.
Lenses and glazing are made of acrylic
and have a rated life of 5-7 years.
Secure Latches
The VRB-25 is supplied with captive
latches. These latches do not require
special tools for their operation.
If secured access to the beacon is
required, special forms of latches are
available that will require special tools
to operate. The use of these latches can
be suffi cient to discourage unauthorised
personnel from opening the beacon.
SPECIFICATIONS
Optics
Lenses
Colours
Service Life
Motor Drive
Type
Current Drain
Rotation
Speeds
Six or eight, optical
grade acrylic, 178.5mm
focal length
Clear, Red (32%T),
Green(34%T),
Blanking Panel (0%T)
Approximately 7 years
30-pole brushless
three-phase direct drive
90mA continuous
typical at 1 rpm
248 user-selectable
speeds in range
0.5 to 15.9 rpm

Mfg by Vega Industries Ltd
H eriot D riv e , P orirua , N Z
C o n tra c t N o D T C G 2 3 -9 3 -C -E 4 3 0 1 2
Speed Control
Speed Variation
Bearings
PID Controller, optical feed-back
with 1200 pulses/rotation
Less than 2% variation.
Automatic torque compensation
Two deep groove sealed ball races,
62mm diameter
DIMENSIONS
Electronics
Power Supply
Controller
Lamp Voltage
Current
Lamps
Lampchanger
Photocell
Monitoring
Nominal 12VDC, 11-30 VDC
acceptable
Vega CALC-20B (motor driver,
lamp changer controller)
Regulated to a maximum of
12V rms by PWM
125mA for CALC-20B
12VDC pre focused vertical fi lament
to 100W
Vega VLC-153 automatic 6-position,
escapement type
Built in, sensor compatible with
USCG Type LDR
Fixed duration contact-closure twice
per rotatation
Top View
ø485mm
1033mm
Environmental
Temperature
Salt
Humidity
Wind
Cooling
Rated for continuous operation -35°C
to +60°C ambient
Rated for continuous exposure to salt air
and sea water spray
Rated for humidity 0-100%, driving rain
at 45° from vertical
Rated to withstand winds to 100kt
Natural radiation only, no cooling fan
or ventilation required
Side View
411mm
CALC-20
V R B -2 5
670mm
Materials
Base
Glazing
Glazing life
Paint Finish
DT 5008 grade Aluminium,
anodised to 25 microns
Optical grade acrylic
Approximately 7 years
Epoxy primer, 2-pot polyurethane gloss
paint on exterior metal surfaces
Bottom View
Breather
200mm (7-7/8") PCD

INTENSITY RANGES
nge at T=0.85 (Nm) 20
25
27 28 29 30 31 32 33 34
35 36
nge at T=0.74 (Nm)
14 16 17 18 19 20 21
22
23
fective Intensity
(kcd)
0 50 100 150 200 250 300 350
100 W NAL-86
4
2.5 2
1.67
1.33
1
0.67 0.5 rpm
75 W NAL-85
50 W NAL-84
35 W NAL-83
4
4
4 2.5 2 1.67 1.33 1
0.67
2 1.33 1 0.67
0.5 rpm
2 1.33 1 0.67
0.5 rpm
0.5 rpm
20 W NAL-82
4 2 1 0.67
0.5 rpm
10 W NAL-81
4 2
1
0.5 rpm
nge at T=0.85 (Nm) 20
25
27 28 29 30 31 32 33 34
35 36
nge at T=0.74 (Nm)
14 16 17 18 19 20 21
22
23
fective Intensity
(kcd)
0 50 100 150 200 250 300 350
3.0A C C-8
4
2
1
0.5 rpm
1.9A C C-8
1.0A C C-8
4
4
2
2
1
1
0.5 rpm
0.5 rpm
3.05A C -8
2.03A C -8
1.15A C -8
4 2 1 0.5 rpm
4 2 1 0.5 rpm
4 2 1 0.5 rpm
PARTS FOR ORDERING
DESCRIPTION
VRB-25 6 Panel (International version)
VRB-25 8 Panel (International version)
VRB-25 6 Panel (USCG without Lampchanger)
Secure Clamps, Add
Specify colour of lenses, specify quantity of blank panels if required
CODE
VRB-25-6P-int
VRB-25-8P-int
VRB-25-6P-US
Add “-SEC” to code
Add note to order
Head Office
Units C&D, West End Centre
Colthouse Lane, Upper Froyle
Hampshire, GU34 4JR
Tel: 01420 520374
Fax: 01420 520373
sales@hydrosphere.co.uk
www.hydrosphere.co.uk
Scottish Office
Fife Renewables Innovation Centre
Ajax Way, Methil
Fife, KY8 3RS
Tel: 01333 422000
sales@hydrosphere.co.uk
VRB_25_V.2.00_Nov_09