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Earth Wire Monitor
Rugged unit to monitor earth wire integrity between point of connection and the transformer
star point
on a 525V 3-phase system.
Can be made for other voltages.
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SVC
Motor start-up Sequence and Vigilance Controller
initially intended for winch motors |
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Celtifier
for monitor
& control through SMS's and miss-calls using your cellphone.
Just needs your SIM card and off you go.
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Wireless proximity detection
initially used for
collision avoidance in underground locos
working on 433MHz
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Digital Timer with DIP
switches
settable range: 0.25 – 63.75 seconds
in steps of 0.25 sec
(longer times can be arranged)
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70 x 50 x 23mm
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USB-RS232-I2C-PIC programmer
interface
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low cost Fluid immersion sensor
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Telephone recording interface
detects on/off-hook,
digitises sound and transmits WAV
packets to PC via USB |
70 x 50 x 23mm
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Spinning wheel with 20 lights
and controller
for probability based on programmed probablilities.
Each number appears at random intervals but has a predefined number of hits out of a
specified number (300 in this example)
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Podium display with response buttons
and controller
Each display box has a thumbwheel number entry associated with it,
after setting up a button is pressed to display the number
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EDMU: Energy Display and Management Unit
For installation in homes to manage peak consumption
by warning, disconnecting and reconnecting load circuits
with internal and external
data links
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Affiliate Products
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passive metal detector
Portable, lightweight and battery operated, fold-up model available.
Based on a sensor module (Mercutech) which monitors small changes in the earth's magnetic field.
(See article on microvolt amplilfier)
Contact Roteck
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Dual beam for outside use
Developed, manufactured and sold by
MJR: contact Martin at 082 3902448
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Legacy Designs
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Automated PC controlled test station with
- 2 serial communication links
- controlled 3-phase current oputput
- cotnrolled 3-phase voltages
- manual override
[2007]
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Multifunction Earth Fault Protection
Relay
with SCADA Comm.s (Profibus)
[2002] |
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Nurse call system with mimic panel
for
80 bed units on serial bus,
full event records in non-volatile memory
[1997] |
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Socket Tester
for testing the integrity and safety of South African power outlets
(being redesigned for ruggedness)
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DC earth leakage monitor
2mA resolution
on 50mA range.
Using magnetic toroids,
based on core balance and BH nonlinearity
[1997]
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Test
station
for Eskom's Remote Terminal Units
in their Acquisition and Telecontrol system.
[1994] |
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Field test unit, based on the 8751, C and Assembler
for a missile launcher including optical, RF detectors and gyros
[1990]
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Motor protection Relay based on analog
simulation of an accurate thermal model of an induction motor.
[1979] |
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Passive earth fault protection Relay
(20-2000mA-ac, 250-2500msec) for high-voltage installations
(Erich's first patent)
[1978]
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